ipq806x: add & enable cpufreq support

This change set enables frequency scaling on ipq806x, which speeds-up
the CPU and allows it to achieve its max frequency.

These patches are cherry-picked & backported from the following location:
*130-132: linux-next
*133-143: LKML - https://lkml.org/lkml/2015/3/21/15
*144: derived from other qcom similar dts
*145: derived from https://chromium.googlesource.com/chromiumos/third_party/kernel/+/chromeos-3.14/drivers/cpufreq/cpufreq-krait.c

Signed-off-by: Mathieu Olivari <[email protected]>

SVN-Revision: 45730

target/linux/ipq806x/config-3.18

@@ -40,10 +40,12 @@ CONFIG_ARM_ARCH_TIMER_EVTSTREAM=y
 CONFIG_ARM_CPU_SUSPEND=y
 CONFIG_ARM_GIC=y
 CONFIG_ARM_HAS_SG_CHAIN=y
+# CONFIG_ARM_KIRKWOOD_CPUFREQ is not set
 CONFIG_ARM_L1_CACHE_SHIFT=6
 CONFIG_ARM_L1_CACHE_SHIFT_6=y
 # CONFIG_ARM_LPAE is not set
 CONFIG_ARM_PATCH_PHYS_VIRT=y
+CONFIG_ARM_QCOM_CPUFREQ=y
 # CONFIG_ARM_SP805_WATCHDOG is not set
 CONFIG_ARM_THUMB=y
 # CONFIG_ARM_THUMBEE is not set
@@ -64,6 +66,7 @@ CONFIG_COMMON_CLK=y
 CONFIG_COMMON_CLK_QCOM=y
 CONFIG_COMPACTION=y
 CONFIG_COREDUMP=y
+# CONFIG_CPUFREQ_DT is not set
 CONFIG_CPU_32v6K=y
 CONFIG_CPU_32v7=y
 CONFIG_CPU_ABRT_EV7=y
@@ -73,11 +76,25 @@ CONFIG_CPU_CACHE_VIPT=y
 CONFIG_CPU_COPY_V6=y
 CONFIG_CPU_CP15=y
 CONFIG_CPU_CP15_MMU=y
+CONFIG_CPU_FREQ=y
+# CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE is not set
+# CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND is not set
+CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y
+# CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE is not set
+# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
+# CONFIG_CPU_FREQ_GOV_CONSERVATIVE is not set
+# CONFIG_CPU_FREQ_GOV_ONDEMAND is not set
+CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
+# CONFIG_CPU_FREQ_GOV_POWERSAVE is not set
+# CONFIG_CPU_FREQ_GOV_USERSPACE is not set
+CONFIG_CPU_FREQ_STAT=y
+# CONFIG_CPU_FREQ_STAT_DETAILS is not set
 CONFIG_CPU_HAS_ASID=y
 # CONFIG_CPU_ICACHE_DISABLE is not set
 CONFIG_CPU_PABRT_V7=y
 CONFIG_CPU_PM=y
 CONFIG_CPU_RMAP=y
+# CONFIG_CPU_THERMAL is not set
 CONFIG_CPU_TLB_V7=y
 CONFIG_CPU_V7=y
 CONFIG_CRC16=y
@@ -111,6 +128,7 @@ CONFIG_GENERIC_BUG=y
 CONFIG_GENERIC_CLOCKEVENTS=y
 CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y
 CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
+CONFIG_GENERIC_CPUFREQ_KRAIT=y
 CONFIG_GENERIC_IDLE_POLL_SETUP=y
 CONFIG_GENERIC_IO=y
 CONFIG_GENERIC_IRQ_SHOW=y
@@ -203,6 +221,10 @@ CONFIG_IRQCHIP=y
 CONFIG_IRQ_DOMAIN=y
 CONFIG_IRQ_FORCED_THREADING=y
 CONFIG_IRQ_WORK=y
+CONFIG_KPSS_XCC=y
+CONFIG_KRAITCC=y
+CONFIG_KRAIT_CLOCKS=y
+CONFIG_KRAIT_L2_ACCESSORS=y
 # CONFIG_LEDS_REGULATOR is not set
 CONFIG_LIBFDT=y
 CONFIG_LOCKUP_DETECTOR=y
@@ -281,6 +303,7 @@ CONFIG_PINCTRL_MSM8X74=y
 CONFIG_PM=y
 CONFIG_PM_CLK=y
 # CONFIG_PM_DEBUG is not set
+CONFIG_PM_OPP=y
 CONFIG_PM_SLEEP=y
 CONFIG_PM_SLEEP_SMP=y
 CONFIG_POWER_RESET=y
@@ -299,6 +322,7 @@ CONFIG_PRINTK_TIME=y
 CONFIG_PROC_PAGE_MONITOR=y
 CONFIG_QCOM_BAM_DMA=y
 CONFIG_QCOM_GSBI=y
+CONFIG_QCOM_HFPLL=y
 CONFIG_QCOM_SCM=y
 CONFIG_QCOM_WDT=y
 CONFIG_RAS=y

target/linux/ipq806x/config-4.0

@@ -41,10 +41,12 @@ CONFIG_ARM_ARCH_TIMER_EVTSTREAM=y
 CONFIG_ARM_CPU_SUSPEND=y
 CONFIG_ARM_GIC=y
 CONFIG_ARM_HAS_SG_CHAIN=y
+# CONFIG_ARM_KIRKWOOD_CPUFREQ is not set
 CONFIG_ARM_L1_CACHE_SHIFT=6
 CONFIG_ARM_L1_CACHE_SHIFT_6=y
 # CONFIG_ARM_LPAE is not set
 CONFIG_ARM_PATCH_PHYS_VIRT=y
+CONFIG_ARM_QCOM_CPUFREQ=y
 # CONFIG_ARM_SMMU is not set
 # CONFIG_ARM_SP805_WATCHDOG is not set
 CONFIG_ARM_THUMB=y
@@ -66,6 +68,7 @@ CONFIG_COMMON_CLK=y
 CONFIG_COMMON_CLK_QCOM=y
 CONFIG_COMPACTION=y
 CONFIG_COREDUMP=y
+# CONFIG_CPUFREQ_DT is not set
 CONFIG_CPU_32v6K=y
 CONFIG_CPU_32v7=y
 CONFIG_CPU_ABRT_EV7=y
@@ -76,11 +79,25 @@ CONFIG_CPU_CACHE_VIPT=y
 CONFIG_CPU_COPY_V6=y
 CONFIG_CPU_CP15=y
 CONFIG_CPU_CP15_MMU=y
+CONFIG_CPU_FREQ=y
+# CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE is not set
+# CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND is not set
+CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y
+# CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE is not set
+# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
+# CONFIG_CPU_FREQ_GOV_CONSERVATIVE is not set
+# CONFIG_CPU_FREQ_GOV_ONDEMAND is not set
+CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
+# CONFIG_CPU_FREQ_GOV_POWERSAVE is not set
+# CONFIG_CPU_FREQ_GOV_USERSPACE is not set
+CONFIG_CPU_FREQ_STAT=y
+# CONFIG_CPU_FREQ_STAT_DETAILS is not set
 CONFIG_CPU_HAS_ASID=y
 # CONFIG_CPU_ICACHE_DISABLE is not set
 CONFIG_CPU_PABRT_V7=y
 CONFIG_CPU_PM=y
 CONFIG_CPU_RMAP=y
+# CONFIG_CPU_THERMAL is not set
 CONFIG_CPU_TLB_V7=y
 CONFIG_CPU_V7=y
 CONFIG_CRC16=y
@@ -114,6 +131,7 @@ CONFIG_GENERIC_BUG=y
 CONFIG_GENERIC_CLOCKEVENTS=y
 CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y
 CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
+CONFIG_GENERIC_CPUFREQ_KRAIT=y
 CONFIG_GENERIC_IDLE_POLL_SETUP=y
 CONFIG_GENERIC_IO=y
 CONFIG_GENERIC_IRQ_SHOW=y
@@ -209,6 +227,10 @@ CONFIG_IRQ_DOMAIN=y
 CONFIG_IRQ_DOMAIN_HIERARCHY=y
 CONFIG_IRQ_FORCED_THREADING=y
 CONFIG_IRQ_WORK=y
+CONFIG_KPSS_XCC=y
+CONFIG_KRAITCC=y
+CONFIG_KRAIT_CLOCKS=y
+CONFIG_KRAIT_L2_ACCESSORS=y
 # CONFIG_LEDS_REGULATOR is not set
 CONFIG_LIBFDT=y
 CONFIG_LOCKUP_DETECTOR=y
@@ -222,6 +244,7 @@ CONFIG_MDIO_BOARDINFO=y
 CONFIG_MDIO_GPIO=y
 CONFIG_MFD_QCOM_RPM=y
 # CONFIG_MFD_SPMI_PMIC is not set
+CONFIG_MFD_SYSCON=y
 CONFIG_MIGHT_HAVE_CACHE_L2X0=y
 CONFIG_MIGHT_HAVE_PCI=y
 CONFIG_MIGRATION=y
@@ -293,6 +316,7 @@ CONFIG_PINCTRL_MSM8X74=y
 CONFIG_PM=y
 CONFIG_PM_CLK=y
 # CONFIG_PM_DEBUG is not set
+CONFIG_PM_OPP=y
 CONFIG_PM_SLEEP=y
 CONFIG_PM_SLEEP_SMP=y
 CONFIG_POWER_RESET=y
@@ -311,6 +335,7 @@ CONFIG_PRINTK_TIME=y
 CONFIG_PROC_PAGE_MONITOR=y
 CONFIG_QCOM_BAM_DMA=y
 CONFIG_QCOM_GSBI=y
+CONFIG_QCOM_HFPLL=y
 CONFIG_QCOM_SCM=y
 CONFIG_QCOM_WDT=y
 CONFIG_RAS=y

target/linux/ipq806x/patches-3.18/130-clk_mux-Fix-set_parent-doing-the-wrong-thing-when-IN.patch

@@ -0,0 +1,60 @@
+From 6793b3cd5da817c4be218bd8632f07cf4d2b0d26 Mon Sep 17 00:00:00 2001
+From: Hans de Goede <[email protected]>
+Date: Wed, 19 Nov 2014 14:48:59 +0100
+Subject: [PATCH] clk_mux: Fix set_parent doing the wrong thing when INDEX_BIT
+ && index >= 3
+
+If CLK_MUX_INDEX_BIT is set, then each bit turns on / off a single parent,
+so theoretically multiple parents could be enabled at the same time, but in
+practice only one bit should ever be 1. So to select parent 0, set
+the register (*) to 0x01, to select parent 1 set it 0x02, parent 2, 0x04,
+parent 3, 0x08, etc.
+
+But the current code does:
+
+                if (mux->flags & CLK_MUX_INDEX_BIT)
+                        index = (1 << ffs(index));
+
+Which means that:
+
+For an input index of 0, ffs returns 0, so we set the register
+to 0x01, ok.
+
+For an input index of 1, ffs returns 1, so we set the register
+to 0x02, ok.
+
+For an input index of 2, ffs returns 2, so we set the register
+to 0x04, ok.
+
+For an input index of 3, ffs returns 1, so we set the register
+to 0x02, not good!
+
+The code should simply be:
+
+                if (mux->flags & CLK_MUX_INDEX_BIT)
+                        index = 1 << index;
+
+Which always does the right thing, this commit fixes this.
+
+Signed-off-by: Hans de Goede <[email protected]>
+Signed-off-by: Michael Turquette <[email protected]>
+---
+ drivers/clk/clk-mux.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/drivers/clk/clk-mux.c b/drivers/clk/clk-mux.c
+index 4f96ff3..6e1ecf9 100644
+--- a/drivers/clk/clk-mux.c
++++ b/drivers/clk/clk-mux.c
+@@ -77,7 +77,7 @@ static int clk_mux_set_parent(struct clk_hw *hw, u8 index)
+ 
+ 	else {
+ 		if (mux->flags & CLK_MUX_INDEX_BIT)
+-			index = (1 << ffs(index));
++			index = 1 << index;
+ 
+ 		if (mux->flags & CLK_MUX_INDEX_ONE)
+ 			index++;
+-- 
+2.1.4
+

target/linux/ipq806x/patches-3.18/131-clk-Add-__clk_mux_determine_rate_closest.patch

@@ -0,0 +1,120 @@
+From 15a02c1f6dd7c2bb150c61d00ffb33f584ff2288 Mon Sep 17 00:00:00 2001
+From: Stephen Boyd <[email protected]>
+Date: Mon, 19 Jan 2015 18:05:28 -0800
+Subject: [PATCH] clk: Add __clk_mux_determine_rate_closest
+
+Some clock drivers want to find the closest rate on the input of
+a mux instead of a rate that's less than or equal to the desired
+rate. Add a generic mux function to support this.
+
+Signed-off-by: Stephen Boyd <[email protected]>
+Tested-by: Kenneth Westfield <[email protected]>
+Signed-off-by: Michael Turquette <[email protected]>
+---
+ drivers/clk/clk.c            | 47 +++++++++++++++++++++++++++++++++++---------
+ include/linux/clk-provider.h |  8 +++++++-
+ 2 files changed, 45 insertions(+), 10 deletions(-)
+
+--- a/drivers/clk/clk.c
++++ b/drivers/clk/clk.c
+@@ -695,14 +695,20 @@ struct clk *__clk_lookup(const char *nam
+ 	return NULL;
+ }
+ 
+-/*
+- * Helper for finding best parent to provide a given frequency. This can be used
+- * directly as a determine_rate callback (e.g. for a mux), or from a more
+- * complex clock that may combine a mux with other operations.
+- */
+-long __clk_mux_determine_rate(struct clk_hw *hw, unsigned long rate,
+-			      unsigned long *best_parent_rate,
+-			      struct clk **best_parent_p)
++static bool mux_is_better_rate(unsigned long rate, unsigned long now,
++			   unsigned long best, unsigned long flags)
++{
++	if (flags & CLK_MUX_ROUND_CLOSEST)
++		return abs(now - rate) < abs(best - rate);
++
++	return now <= rate && now > best;
++}
++
++static long
++clk_mux_determine_rate_flags(struct clk_hw *hw, unsigned long rate,
++			     unsigned long *best_parent_rate,
++			     struct clk **best_parent_p,
++			     unsigned long flags)
+ {
+ 	struct clk *clk = hw->clk, *parent, *best_parent = NULL;
+ 	int i, num_parents;
+@@ -730,7 +736,7 @@ long __clk_mux_determine_rate(struct clk
+ 			parent_rate = __clk_round_rate(parent, rate);
+ 		else
+ 			parent_rate = __clk_get_rate(parent);
+-		if (parent_rate <= rate && parent_rate > best) {
++		if (mux_is_better_rate(rate, parent_rate, best, flags)) {
+ 			best_parent = parent;
+ 			best = parent_rate;
+ 		}
+@@ -743,8 +749,31 @@ out:
+ 
+ 	return best;
+ }
++
++/*
++ * Helper for finding best parent to provide a given frequency. This can be used
++ * directly as a determine_rate callback (e.g. for a mux), or from a more
++ * complex clock that may combine a mux with other operations.
++ */
++long __clk_mux_determine_rate(struct clk_hw *hw, unsigned long rate,
++			      unsigned long *best_parent_rate,
++			      struct clk **best_parent_p)
++{
++	return clk_mux_determine_rate_flags(hw, rate, best_parent_rate,
++					    best_parent_p, 0);
++}
+ EXPORT_SYMBOL_GPL(__clk_mux_determine_rate);
+ 
++long __clk_mux_determine_rate_closest(struct clk_hw *hw, unsigned long rate,
++			      unsigned long *best_parent_rate,
++			      struct clk **best_parent_p)
++{
++	return clk_mux_determine_rate_flags(hw, rate, best_parent_rate,
++					    best_parent_p,
++					    CLK_MUX_ROUND_CLOSEST);
++}
++EXPORT_SYMBOL_GPL(__clk_mux_determine_rate_closest);
++
+ /***        clk api        ***/
+ 
+ void __clk_unprepare(struct clk *clk)
+--- a/include/linux/clk-provider.h
++++ b/include/linux/clk-provider.h
+@@ -382,6 +382,8 @@ struct clk *clk_register_divider_table(s
+  *	register, and mask of mux bits are in higher 16-bit of this register.
+  *	While setting the mux bits, higher 16-bit should also be updated to
+  *	indicate changing mux bits.
++ * CLK_MUX_ROUND_CLOSEST - Use the parent rate that is closest to the desired
++ *	frequency.
+  */
+ struct clk_mux {
+ 	struct clk_hw	hw;
+@@ -396,7 +398,8 @@ struct clk_mux {
+ #define CLK_MUX_INDEX_ONE		BIT(0)
+ #define CLK_MUX_INDEX_BIT		BIT(1)
+ #define CLK_MUX_HIWORD_MASK		BIT(2)
+-#define CLK_MUX_READ_ONLY	BIT(3) /* mux setting cannot be changed */
++#define CLK_MUX_READ_ONLY		BIT(3) /* mux can't be changed */
++#define CLK_MUX_ROUND_CLOSEST		BIT(4)
+ 
+ extern const struct clk_ops clk_mux_ops;
+ extern const struct clk_ops clk_mux_ro_ops;
+@@ -554,6 +557,9 @@ struct clk *__clk_lookup(const char *nam
+ long __clk_mux_determine_rate(struct clk_hw *hw, unsigned long rate,
+ 			      unsigned long *best_parent_rate,
+ 			      struct clk **best_parent_p);
++long __clk_mux_determine_rate_closest(struct clk_hw *hw, unsigned long rate,
++			      unsigned long *best_parent_rate,
++			      struct clk **best_parent_p);
+ 
+ /*
+  * FIXME clock api without lock protection

target/linux/ipq806x/patches-3.18/132-clk-Add-clk_unregister_-divider-gate-mux-to-close-me.patch

@@ -0,0 +1,115 @@
+From 4e3c021fb995bcbb5d1f814d00584cb80eb904a8 Mon Sep 17 00:00:00 2001
+From: Krzysztof Kozlowski <[email protected]>
+Date: Mon, 5 Jan 2015 10:52:40 +0100
+Subject: [PATCH] clk: Add clk_unregister_{divider, gate, mux} to close memory
+ leak
+
+The common clk_register_{divider,gate,mux} functions allocated memory
+for internal data which wasn't freed anywhere. Drivers using these
+helpers could only unregister clocks but the memory would still leak.
+
+Add corresponding unregister functions which will release all resources.
+
+Signed-off-by: Krzysztof Kozlowski <[email protected]>
+Reviewed-by: Stephen Boyd <[email protected]>
+Signed-off-by: Michael Turquette <[email protected]>
+---
+ drivers/clk/clk-divider.c    | 16 ++++++++++++++++
+ drivers/clk/clk-gate.c       | 16 ++++++++++++++++
+ drivers/clk/clk-mux.c        | 16 ++++++++++++++++
+ include/linux/clk-provider.h |  4 ++++
+ 4 files changed, 52 insertions(+)
+
+--- a/drivers/clk/clk-divider.c
++++ b/drivers/clk/clk-divider.c
+@@ -463,3 +463,19 @@ struct clk *clk_register_divider_table(s
+ 			width, clk_divider_flags, table, lock);
+ }
+ EXPORT_SYMBOL_GPL(clk_register_divider_table);
++
++void clk_unregister_divider(struct clk *clk)
++{
++	struct clk_divider *div;
++	struct clk_hw *hw;
++
++	hw = __clk_get_hw(clk);
++	if (!hw)
++		return;
++
++	div = to_clk_divider(hw);
++
++	clk_unregister(clk);
++	kfree(div);
++}
++EXPORT_SYMBOL_GPL(clk_unregister_divider);
+--- a/drivers/clk/clk-gate.c
++++ b/drivers/clk/clk-gate.c
+@@ -162,3 +162,19 @@ struct clk *clk_register_gate(struct dev
+ 	return clk;
+ }
+ EXPORT_SYMBOL_GPL(clk_register_gate);
++
++void clk_unregister_gate(struct clk *clk)
++{
++	struct clk_gate *gate;
++	struct clk_hw *hw;
++
++	hw = __clk_get_hw(clk);
++	if (!hw)
++		return;
++
++	gate = to_clk_gate(hw);
++
++	clk_unregister(clk);
++	kfree(gate);
++}
++EXPORT_SYMBOL_GPL(clk_unregister_gate);
+--- a/drivers/clk/clk-mux.c
++++ b/drivers/clk/clk-mux.c
+@@ -177,3 +177,19 @@ struct clk *clk_register_mux(struct devi
+ 				      NULL, lock);
+ }
+ EXPORT_SYMBOL_GPL(clk_register_mux);
++
++void clk_unregister_mux(struct clk *clk)
++{
++	struct clk_mux *mux;
++	struct clk_hw *hw;
++
++	hw = __clk_get_hw(clk);
++	if (!hw)
++		return;
++
++	mux = to_clk_mux(hw);
++
++	clk_unregister(clk);
++	kfree(mux);
++}
++EXPORT_SYMBOL_GPL(clk_unregister_mux);
+--- a/include/linux/clk-provider.h
++++ b/include/linux/clk-provider.h
+@@ -294,6 +294,7 @@ struct clk *clk_register_gate(struct dev
+ 		const char *parent_name, unsigned long flags,
+ 		void __iomem *reg, u8 bit_idx,
+ 		u8 clk_gate_flags, spinlock_t *lock);
++void clk_unregister_gate(struct clk *clk);
+ 
+ struct clk_div_table {
+ 	unsigned int	val;
+@@ -361,6 +362,7 @@ struct clk *clk_register_divider_table(s
+ 		void __iomem *reg, u8 shift, u8 width,
+ 		u8 clk_divider_flags, const struct clk_div_table *table,
+ 		spinlock_t *lock);
++void clk_unregister_divider(struct clk *clk);
+ 
+ /**
+  * struct clk_mux - multiplexer clock
+@@ -414,6 +416,8 @@ struct clk *clk_register_mux_table(struc
+ 		void __iomem *reg, u8 shift, u32 mask,
+ 		u8 clk_mux_flags, u32 *table, spinlock_t *lock);
+ 
++void clk_unregister_mux(struct clk *clk);
++
+ void of_fixed_factor_clk_setup(struct device_node *node);
+ 
+ /**

target/linux/ipq806x/patches-3.18/133-ARM-Add-Krait-L2-register-accessor-functions.patch

@@ -0,0 +1,144 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v3,01/13] ARM: Add Krait L2 register accessor functions
+From: Stephen Boyd <[email protected]>
+X-Patchwork-Id: 6063051
+Message-Id: <[email protected]>
+To: Mike Turquette <[email protected]>, Stephen Boyd <[email protected]>
+Cc: [email protected], [email protected],
+	[email protected], [email protected],
+	Viresh Kumar <[email protected]>,
+	Mark Rutland <[email protected]>, Russell King <[email protected]>,
+	Courtney Cavin <[email protected]>
+Date: Fri, 20 Mar 2015 23:45:20 -0700
+
+Krait CPUs have a handful of L2 cache controller registers that
+live behind a cp15 based indirection register. First you program
+the indirection register (l2cpselr) to point the L2 'window'
+register (l2cpdr) at what you want to read/write.  Then you
+read/write the 'window' register to do what you want. The
+l2cpselr register is not banked per-cpu so we must lock around
+accesses to it to prevent other CPUs from re-pointing l2cpdr
+underneath us.
+
+Cc: Mark Rutland <[email protected]>
+Cc: Russell King <[email protected]>
+Cc: Courtney Cavin <[email protected]>
+Signed-off-by: Stephen Boyd <[email protected]>
+
+---
+arch/arm/common/Kconfig                   |  3 ++
+ arch/arm/common/Makefile                  |  1 +
+ arch/arm/common/krait-l2-accessors.c      | 58 +++++++++++++++++++++++++++++++
+ arch/arm/include/asm/krait-l2-accessors.h | 20 +++++++++++
+ 4 files changed, 82 insertions(+)
+ create mode 100644 arch/arm/common/krait-l2-accessors.c
+ create mode 100644 arch/arm/include/asm/krait-l2-accessors.h
+
+--- a/arch/arm/common/Kconfig
++++ b/arch/arm/common/Kconfig
+@@ -9,6 +9,9 @@ config DMABOUNCE
+ 	bool
+ 	select ZONE_DMA
+ 
++config KRAIT_L2_ACCESSORS
++	bool
++
+ config SHARP_LOCOMO
+ 	bool
+ 
+--- a/arch/arm/common/Makefile
++++ b/arch/arm/common/Makefile
+@@ -7,6 +7,7 @@ obj-y				+= firmware.o
+ obj-$(CONFIG_ICST)		+= icst.o
+ obj-$(CONFIG_SA1111)		+= sa1111.o
+ obj-$(CONFIG_DMABOUNCE)		+= dmabounce.o
++obj-$(CONFIG_KRAIT_L2_ACCESSORS) += krait-l2-accessors.o
+ obj-$(CONFIG_SHARP_LOCOMO)	+= locomo.o
+ obj-$(CONFIG_SHARP_PARAM)	+= sharpsl_param.o
+ obj-$(CONFIG_SHARP_SCOOP)	+= scoop.o
+--- /dev/null
++++ b/arch/arm/common/krait-l2-accessors.c
+@@ -0,0 +1,58 @@
++/*
++ * Copyright (c) 2011-2013, The Linux Foundation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 and
++ * only version 2 as published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ */
++
++#include <linux/spinlock.h>
++#include <linux/export.h>
++
++#include <asm/barrier.h>
++#include <asm/krait-l2-accessors.h>
++
++static DEFINE_RAW_SPINLOCK(krait_l2_lock);
++
++void krait_set_l2_indirect_reg(u32 addr, u32 val)
++{
++	unsigned long flags;
++
++	raw_spin_lock_irqsave(&krait_l2_lock, flags);
++	/*
++	 * Select the L2 window by poking l2cpselr, then write to the window
++	 * via l2cpdr.
++	 */
++	asm volatile ("mcr p15, 3, %0, c15, c0, 6 @ l2cpselr" : : "r" (addr));
++	isb();
++	asm volatile ("mcr p15, 3, %0, c15, c0, 7 @ l2cpdr" : : "r" (val));
++	isb();
++
++	raw_spin_unlock_irqrestore(&krait_l2_lock, flags);
++}
++EXPORT_SYMBOL(krait_set_l2_indirect_reg);
++
++u32 krait_get_l2_indirect_reg(u32 addr)
++{
++	u32 val;
++	unsigned long flags;
++
++	raw_spin_lock_irqsave(&krait_l2_lock, flags);
++	/*
++	 * Select the L2 window by poking l2cpselr, then read from the window
++	 * via l2cpdr.
++	 */
++	asm volatile ("mcr p15, 3, %0, c15, c0, 6 @ l2cpselr" : : "r" (addr));
++	isb();
++	asm volatile ("mrc p15, 3, %0, c15, c0, 7 @ l2cpdr" : "=r" (val));
++
++	raw_spin_unlock_irqrestore(&krait_l2_lock, flags);
++
++	return val;
++}
++EXPORT_SYMBOL(krait_get_l2_indirect_reg);
+--- /dev/null
++++ b/arch/arm/include/asm/krait-l2-accessors.h
+@@ -0,0 +1,20 @@
++/*
++ * Copyright (c) 2011-2013, The Linux Foundation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 and
++ * only version 2 as published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ */
++
++#ifndef __ASMARM_KRAIT_L2_ACCESSORS_H
++#define __ASMARM_KRAIT_L2_ACCESSORS_H
++
++extern void krait_set_l2_indirect_reg(u32 addr, u32 val);
++extern u32 krait_get_l2_indirect_reg(u32 addr);
++
++#endif

target/linux/ipq806x/patches-3.18/134-clk-mux-Split-out-register-accessors-for-reuse.patch

@@ -0,0 +1,192 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v3,02/13] clk: mux: Split out register accessors for reuse
+From: Stephen Boyd <[email protected]>
+X-Patchwork-Id: 6063111
+Message-Id: <[email protected]>
+To: Mike Turquette <[email protected]>, Stephen Boyd <[email protected]>
+Cc: [email protected], [email protected],
+	[email protected], [email protected],
+	Viresh Kumar <[email protected]>
+Date: Fri, 20 Mar 2015 23:45:21 -0700
+
+We want to reuse the logic in clk-mux.c for other clock drivers
+that don't use readl as register accessors. Fortunately, there
+really isn't much to the mux code besides the table indirection
+and quirk flags if you assume any bit shifting and masking has
+been done already. Pull that logic out into reusable functions
+that operate on an optional table and some flags so that other
+drivers can use the same logic.
+
+Signed-off-by: Stephen Boyd <[email protected]>
+
+---
+drivers/clk/clk-mux.c        | 76 +++++++++++++++++++++++++++-----------------
+ include/linux/clk-provider.h |  9 ++++--
+ 2 files changed, 54 insertions(+), 31 deletions(-)
+
+--- a/drivers/clk/clk-mux.c
++++ b/drivers/clk/clk-mux.c
+@@ -29,35 +29,24 @@
+ 
+ #define to_clk_mux(_hw) container_of(_hw, struct clk_mux, hw)
+ 
+-static u8 clk_mux_get_parent(struct clk_hw *hw)
++unsigned int clk_mux_get_parent(struct clk_hw *hw, unsigned int val,
++				unsigned int *table, unsigned long flags)
+ {
+-	struct clk_mux *mux = to_clk_mux(hw);
+ 	int num_parents = __clk_get_num_parents(hw->clk);
+-	u32 val;
+ 
+-	/*
+-	 * FIXME need a mux-specific flag to determine if val is bitwise or numeric
+-	 * e.g. sys_clkin_ck's clksel field is 3 bits wide, but ranges from 0x1
+-	 * to 0x7 (index starts at one)
+-	 * OTOH, pmd_trace_clk_mux_ck uses a separate bit for each clock, so
+-	 * val = 0x4 really means "bit 2, index starts at bit 0"
+-	 */
+-	val = clk_readl(mux->reg) >> mux->shift;
+-	val &= mux->mask;
+-
+-	if (mux->table) {
++	if (table) {
+ 		int i;
+ 
+ 		for (i = 0; i < num_parents; i++)
+-			if (mux->table[i] == val)
++			if (table[i] == val)
+ 				return i;
+ 		return -EINVAL;
+ 	}
+ 
+-	if (val && (mux->flags & CLK_MUX_INDEX_BIT))
++	if (val && (flags & CLK_MUX_INDEX_BIT))
+ 		val = ffs(val) - 1;
+ 
+-	if (val && (mux->flags & CLK_MUX_INDEX_ONE))
++	if (val && (flags & CLK_MUX_INDEX_ONE))
+ 		val--;
+ 
+ 	if (val >= num_parents)
+@@ -65,24 +54,53 @@ static u8 clk_mux_get_parent(struct clk_
+ 
+ 	return val;
+ }
++EXPORT_SYMBOL_GPL(clk_mux_get_parent);
+ 
+-static int clk_mux_set_parent(struct clk_hw *hw, u8 index)
++static u8 _clk_mux_get_parent(struct clk_hw *hw)
+ {
+ 	struct clk_mux *mux = to_clk_mux(hw);
+ 	u32 val;
+-	unsigned long flags = 0;
+ 
+-	if (mux->table)
+-		index = mux->table[index];
++	/*
++	 * FIXME need a mux-specific flag to determine if val is bitwise or numeric
++	 * e.g. sys_clkin_ck's clksel field is 3 bits wide, but ranges from 0x1
++	 * to 0x7 (index starts at one)
++	 * OTOH, pmd_trace_clk_mux_ck uses a separate bit for each clock, so
++	 * val = 0x4 really means "bit 2, index starts at bit 0"
++	 */
++	val = clk_readl(mux->reg) >> mux->shift;
++	val &= mux->mask;
++
++	return clk_mux_get_parent(hw, val, mux->table, mux->flags);
++}
+ 
+-	else {
+-		if (mux->flags & CLK_MUX_INDEX_BIT)
+-			index = 1 << index;
++unsigned int clk_mux_reindex(u8 index, unsigned int *table,
++			     unsigned long flags)
++{
++	unsigned int val = index;
+ 
+-		if (mux->flags & CLK_MUX_INDEX_ONE)
+-			index++;
++	if (table) {
++		val = table[val];
++	} else {
++		if (flags & CLK_MUX_INDEX_BIT)
++			val = 1 << index;
++
++		if (flags & CLK_MUX_INDEX_ONE)
++			val++;
+ 	}
+ 
++	return val;
++}
++EXPORT_SYMBOL_GPL(clk_mux_reindex);
++
++static int clk_mux_set_parent(struct clk_hw *hw, u8 index)
++{
++	struct clk_mux *mux = to_clk_mux(hw);
++	u32 val;
++	unsigned long flags = 0;
++
++	index = clk_mux_reindex(index, mux->table, mux->flags);
++
+ 	if (mux->lock)
+ 		spin_lock_irqsave(mux->lock, flags);
+ 
+@@ -102,21 +120,21 @@ static int clk_mux_set_parent(struct clk
+ }
+ 
+ const struct clk_ops clk_mux_ops = {
+-	.get_parent = clk_mux_get_parent,
++	.get_parent = _clk_mux_get_parent,
+ 	.set_parent = clk_mux_set_parent,
+ 	.determine_rate = __clk_mux_determine_rate,
+ };
+ EXPORT_SYMBOL_GPL(clk_mux_ops);
+ 
+ const struct clk_ops clk_mux_ro_ops = {
+-	.get_parent = clk_mux_get_parent,
++	.get_parent = _clk_mux_get_parent,
+ };
+ EXPORT_SYMBOL_GPL(clk_mux_ro_ops);
+ 
+ struct clk *clk_register_mux_table(struct device *dev, const char *name,
+ 		const char **parent_names, u8 num_parents, unsigned long flags,
+ 		void __iomem *reg, u8 shift, u32 mask,
+-		u8 clk_mux_flags, u32 *table, spinlock_t *lock)
++		u8 clk_mux_flags, unsigned int *table, spinlock_t *lock)
+ {
+ 	struct clk_mux *mux;
+ 	struct clk *clk;
+--- a/include/linux/clk-provider.h
++++ b/include/linux/clk-provider.h
+@@ -390,7 +390,7 @@ void clk_unregister_divider(struct clk *
+ struct clk_mux {
+ 	struct clk_hw	hw;
+ 	void __iomem	*reg;
+-	u32		*table;
++	unsigned int	*table;
+ 	u32		mask;
+ 	u8		shift;
+ 	u8		flags;
+@@ -406,6 +406,11 @@ struct clk_mux {
+ extern const struct clk_ops clk_mux_ops;
+ extern const struct clk_ops clk_mux_ro_ops;
+ 
++unsigned int clk_mux_get_parent(struct clk_hw *hw, unsigned int val,
++				unsigned int *table, unsigned long flags);
++unsigned int clk_mux_reindex(u8 index, unsigned int *table,
++			     unsigned long flags);
++
+ struct clk *clk_register_mux(struct device *dev, const char *name,
+ 		const char **parent_names, u8 num_parents, unsigned long flags,
+ 		void __iomem *reg, u8 shift, u8 width,
+@@ -414,7 +419,7 @@ struct clk *clk_register_mux(struct devi
+ struct clk *clk_register_mux_table(struct device *dev, const char *name,
+ 		const char **parent_names, u8 num_parents, unsigned long flags,
+ 		void __iomem *reg, u8 shift, u32 mask,
+-		u8 clk_mux_flags, u32 *table, spinlock_t *lock);
++		u8 clk_mux_flags, unsigned int *table, spinlock_t *lock);
+ 
+ void clk_unregister_mux(struct clk *clk);
+ 

target/linux/ipq806x/patches-3.18/135-clk-Avoid-sending-high-rates-to-downstream-clocks-during-set_rate.patch

@@ -0,0 +1,129 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v3, 03/13] clk: Avoid sending high rates to downstream clocks during
+	set_rate
+From: Stephen Boyd <[email protected]>
+X-Patchwork-Id: 6063271
+Message-Id: <[email protected]>
+To: Mike Turquette <[email protected]>, Stephen Boyd <[email protected]>
+Cc: [email protected], [email protected],
+	[email protected], [email protected],
+	Viresh Kumar <[email protected]>
+Date: Fri, 20 Mar 2015 23:45:22 -0700
+
+If a clock is on and we call clk_set_rate() on it we may get into
+a situation where the clock temporarily increases in rate
+dramatically while we walk the tree and call .set_rate() ops. For
+example, consider a case where a PLL feeds into a divider.
+Initially the divider is set to divide by 1 and the PLL is
+running fairly slow (100MHz). The downstream consumer of the
+divider output can only handle rates =< 400 MHz, but the divider
+can only choose between divisors of 1 and 4.
+
+ +-----+   +----------------+
+ | PLL |-->| div 1 or div 4 |---> consumer device
+ +-----+   +----------------+
+
+To achieve a rate of 400MHz on the output of the divider, we
+would have to set the rate of the PLL to 1.6 GHz and then divide
+it by 4. The current code would set the PLL to 1.6GHz first while
+the divider is still set to 1, thus causing the downstream
+consumer of the clock to receive a few clock cycles of 1.6GHz
+clock (far beyond it's maximum acceptable rate). We should be
+changing the divider first before increasing the PLL rate to
+avoid this problem.
+
+Therefore, set the rate of any child clocks that are increasing
+in rate from their current rate so that they can increase their
+dividers if necessary. We assume that there isn't such a thing as
+minimum rate requirements.
+
+Signed-off-by: Stephen Boyd <[email protected]>
+
+---
+drivers/clk/clk.c | 34 ++++++++++++++++++++++------------
+ 1 file changed, 22 insertions(+), 12 deletions(-)
+
+--- a/drivers/clk/clk.c
++++ b/drivers/clk/clk.c
+@@ -1476,21 +1476,23 @@ static struct clk *clk_propagate_rate_ch
+  * walk down a subtree and set the new rates notifying the rate
+  * change on the way
+  */
+-static void clk_change_rate(struct clk *clk)
++static void clk_change_rate(struct clk *clk, unsigned long best_parent_rate)
+ {
+ 	struct clk *child;
+ 	struct hlist_node *tmp;
+ 	unsigned long old_rate;
+-	unsigned long best_parent_rate = 0;
+ 	bool skip_set_rate = false;
+ 	struct clk *old_parent;
+ 
+-	old_rate = clk->rate;
++	hlist_for_each_entry(child, &clk->children, child_node) {
++		/* Skip children who will be reparented to another clock */
++		if (child->new_parent && child->new_parent != clk)
++			continue;
++		if (child->new_rate > child->rate)
++			clk_change_rate(child, clk->new_rate);
++	}
+ 
+-	if (clk->new_parent)
+-		best_parent_rate = clk->new_parent->rate;
+-	else if (clk->parent)
+-		best_parent_rate = clk->parent->rate;
++	old_rate = clk->rate;
+ 
+ 	if (clk->new_parent && clk->new_parent != clk->parent) {
+ 		old_parent = __clk_set_parent_before(clk, clk->new_parent);
+@@ -1510,7 +1512,7 @@ static void clk_change_rate(struct clk *
+ 	if (!skip_set_rate && clk->ops->set_rate)
+ 		clk->ops->set_rate(clk->hw, clk->new_rate, best_parent_rate);
+ 
+-	clk->rate = clk_recalc(clk, best_parent_rate);
++	clk->rate = clk->new_rate;
+ 
+ 	if (clk->notifier_count && old_rate != clk->rate)
+ 		__clk_notify(clk, POST_RATE_CHANGE, old_rate, clk->rate);
+@@ -1523,12 +1525,13 @@ static void clk_change_rate(struct clk *
+ 		/* Skip children who will be reparented to another clock */
+ 		if (child->new_parent && child->new_parent != clk)
+ 			continue;
+-		clk_change_rate(child);
++		if (child->new_rate != child->rate)
++			clk_change_rate(child, clk->new_rate);
+ 	}
+ 
+ 	/* handle the new child who might not be in clk->children yet */
+-	if (clk->new_child)
+-		clk_change_rate(clk->new_child);
++	if (clk->new_child && clk->new_child->new_rate != clk->new_child->rate)
++		clk_change_rate(clk->new_child, clk->new_rate);
+ }
+ 
+ /**
+@@ -1556,6 +1559,7 @@ int clk_set_rate(struct clk *clk, unsign
+ {
+ 	struct clk *top, *fail_clk;
+ 	int ret = 0;
++	unsigned long parent_rate;
+ 
+ 	if (!clk)
+ 		return 0;
+@@ -1589,8 +1593,13 @@ int clk_set_rate(struct clk *clk, unsign
+ 		goto out;
+ 	}
+ 
++	if (top->parent)
++		parent_rate = top->parent->rate;
++	else
++		parent_rate = 0;
++
+ 	/* change the rates */
+-	clk_change_rate(top);
++	clk_change_rate(top, parent_rate);
+ 
+ out:
+ 	clk_prepare_unlock();

target/linux/ipq806x/patches-3.18/136-clk-Add-safe-switch-hook.patch

@@ -0,0 +1,170 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v3,04/13] clk: Add safe switch hook
+From: Stephen Boyd <[email protected]>
+X-Patchwork-Id: 6063211
+Message-Id: <[email protected]>
+To: Mike Turquette <[email protected]>, Stephen Boyd <[email protected]>
+Cc: [email protected], [email protected],
+	[email protected], [email protected],
+	Viresh Kumar <[email protected]>
+Date: Fri, 20 Mar 2015 23:45:23 -0700
+
+Sometimes clocks can't accept their parent source turning off
+while the source is reprogrammed to a different rate. Most
+notably CPU clocks require a way to switch away from the current
+PLL they're running on, reprogram that PLL to a new rate, and
+then switch back to the PLL with the new rate once they're done.
+Add a hook that drivers can implement allowing them to return a
+'safe parent' that they can switch their parent to while the
+upstream source is reprogrammed to support this.
+
+Signed-off-by: Stephen Boyd <[email protected]>
+
+---
+This patch is good enough for Krait, but soon I'll need to 
+support a "safe rate" where we ask a clock what rate it needs to be running
+at to be sure it's within voltage constraints. Right now safe parent
+handles that problem on Krait, but on other platforms it won't work.
+
+ drivers/clk/clk.c            | 61 ++++++++++++++++++++++++++++++++++++++------
+ include/linux/clk-provider.h |  1 +
+ 2 files changed, 54 insertions(+), 8 deletions(-)
+
+--- a/drivers/clk/clk.c
++++ b/drivers/clk/clk.c
+@@ -1350,7 +1350,8 @@ out:
+ static void clk_calc_subtree(struct clk *clk, unsigned long new_rate,
+ 			     struct clk *new_parent, u8 p_index)
+ {
+-	struct clk *child;
++	struct clk *child, *parent;
++	struct clk_hw *parent_hw;
+ 
+ 	clk->new_rate = new_rate;
+ 	clk->new_parent = new_parent;
+@@ -1360,6 +1361,18 @@ static void clk_calc_subtree(struct clk
+ 	if (new_parent && new_parent != clk->parent)
+ 		new_parent->new_child = clk;
+ 
++	if (clk->ops->get_safe_parent) {
++		parent_hw = clk->ops->get_safe_parent(clk->hw);
++		if (parent_hw) {
++			parent = parent_hw->clk;
++			p_index = clk_fetch_parent_index(clk, parent);
++			clk->safe_parent_index = p_index;
++			clk->safe_parent = parent;
++		}
++	} else {
++		clk->safe_parent = NULL;
++	}
++
+ 	hlist_for_each_entry(child, &clk->children, child_node) {
+ 		child->new_rate = clk_recalc(child, new_rate);
+ 		clk_calc_subtree(child, child->new_rate, NULL, 0);
+@@ -1439,17 +1452,47 @@ out:
+  * so that in case of an error we can walk down the whole tree again and
+  * abort the change.
+  */
+-static struct clk *clk_propagate_rate_change(struct clk *clk, unsigned long event)
++static struct clk *clk_propagate_rate_change(struct clk *clk,
++					     unsigned long event)
+ {
+ 	struct clk *child, *tmp_clk, *fail_clk = NULL;
++	struct clk *old_parent;
+ 	int ret = NOTIFY_DONE;
+ 
+-	if (clk->rate == clk->new_rate)
++	if (clk->rate == clk->new_rate && event != POST_RATE_CHANGE)
+ 		return NULL;
+ 
++	switch (event) {
++	case PRE_RATE_CHANGE:
++		if (clk->safe_parent)
++			clk->ops->set_parent(clk->hw, clk->safe_parent_index);
++		clk->old_rate = clk->rate;
++		break;
++	case POST_RATE_CHANGE:
++		if (clk->safe_parent) {
++			old_parent = __clk_set_parent_before(clk,
++							     clk->new_parent);
++			if (clk->ops->set_rate_and_parent) {
++				clk->ops->set_rate_and_parent(clk->hw,
++						clk->new_rate,
++						clk->new_parent ?
++						clk->new_parent->rate : 0,
++						clk->new_parent_index);
++			} else if (clk->ops->set_parent) {
++				clk->ops->set_parent(clk->hw,
++						clk->new_parent_index);
++			}
++			__clk_set_parent_after(clk, clk->new_parent,
++					       old_parent);
++		}
++		break;
++	}
++
+ 	if (clk->notifier_count) {
+-		ret = __clk_notify(clk, event, clk->rate, clk->new_rate);
+-		if (ret & NOTIFY_STOP_MASK)
++		if (event != POST_RATE_CHANGE || clk->old_rate != clk->rate)
++			ret = __clk_notify(clk, event, clk->old_rate,
++					   clk->new_rate);
++		if (ret & NOTIFY_STOP_MASK && event != POST_RATE_CHANGE)
+ 			fail_clk = clk;
+ 	}
+ 
+@@ -1494,7 +1537,8 @@ static void clk_change_rate(struct clk *
+ 
+ 	old_rate = clk->rate;
+ 
+-	if (clk->new_parent && clk->new_parent != clk->parent) {
++	if (clk->new_parent && clk->new_parent != clk->parent &&
++			!clk->safe_parent) {
+ 		old_parent = __clk_set_parent_before(clk, clk->new_parent);
+ 
+ 		if (clk->ops->set_rate_and_parent) {
+@@ -1514,9 +1558,6 @@ static void clk_change_rate(struct clk *
+ 
+ 	clk->rate = clk->new_rate;
+ 
+-	if (clk->notifier_count && old_rate != clk->rate)
+-		__clk_notify(clk, POST_RATE_CHANGE, old_rate, clk->rate);
+-
+ 	/*
+ 	 * Use safe iteration, as change_rate can actually swap parents
+ 	 * for certain clock types.
+@@ -1601,6 +1642,8 @@ int clk_set_rate(struct clk *clk, unsign
+ 	/* change the rates */
+ 	clk_change_rate(top, parent_rate);
+ 
++	clk_propagate_rate_change(top, POST_RATE_CHANGE);
++
+ out:
+ 	clk_prepare_unlock();
+ 
+--- a/include/linux/clk-provider.h
++++ b/include/linux/clk-provider.h
+@@ -179,6 +179,7 @@ struct clk_ops {
+ 					struct clk **best_parent_clk);
+ 	int		(*set_parent)(struct clk_hw *hw, u8 index);
+ 	u8		(*get_parent)(struct clk_hw *hw);
++	struct clk_hw	*(*get_safe_parent)(struct clk_hw *hw);
+ 	int		(*set_rate)(struct clk_hw *hw, unsigned long rate,
+ 				    unsigned long parent_rate);
+ 	int		(*set_rate_and_parent)(struct clk_hw *hw,
+--- a/include/linux/clk-private.h
++++ b/include/linux/clk-private.h
+@@ -38,8 +38,11 @@ struct clk {
+ 	struct clk		**parents;
+ 	u8			num_parents;
+ 	u8			new_parent_index;
++	u8			safe_parent_index;
+ 	unsigned long		rate;
++	unsigned long		old_rate;
+ 	unsigned long		new_rate;
++	struct clk		*safe_parent;
+ 	struct clk		*new_parent;
+ 	struct clk		*new_child;
+ 	unsigned long		flags;

target/linux/ipq806x/patches-3.18/137-clk-qcom-Add-support-for-High-Frequency-PLLs-HFPLLs.patch

@@ -0,0 +1,351 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v3,05/13] clk: qcom: Add support for High-Frequency PLLs (HFPLLs)
+From: Stephen Boyd <[email protected]>
+X-Patchwork-Id: 6063261
+Message-Id: <[email protected]>
+To: Mike Turquette <[email protected]>, Stephen Boyd <[email protected]>
+Cc: [email protected], [email protected],
+	[email protected], [email protected],
+	Viresh Kumar <[email protected]>
+Date: Fri, 20 Mar 2015 23:45:24 -0700
+
+HFPLLs are the main frequency source for Krait CPU clocks. Add
+support for changing the rate of these PLLs.
+
+Signed-off-by: Stephen Boyd <[email protected]>
+
+---
+I'd really like to get rid of __clk_hfpll_init_once() if possible...
+
+ drivers/clk/qcom/Makefile    |   1 +
+ drivers/clk/qcom/clk-hfpll.c | 253 +++++++++++++++++++++++++++++++++++++++++++
+ drivers/clk/qcom/clk-hfpll.h |  54 +++++++++
+ 3 files changed, 308 insertions(+)
+ create mode 100644 drivers/clk/qcom/clk-hfpll.c
+ create mode 100644 drivers/clk/qcom/clk-hfpll.h
+
+--- a/drivers/clk/qcom/Makefile
++++ b/drivers/clk/qcom/Makefile
+@@ -6,6 +6,7 @@ clk-qcom-y += clk-pll.o
+ clk-qcom-y += clk-rcg.o
+ clk-qcom-y += clk-rcg2.o
+ clk-qcom-y += clk-branch.o
++clk-qcom-y += clk-hfpll.o
+ clk-qcom-y += reset.o
+ 
+ obj-$(CONFIG_APQ_GCC_8084) += gcc-apq8084.o
+--- /dev/null
++++ b/drivers/clk/qcom/clk-hfpll.c
+@@ -0,0 +1,253 @@
++/*
++ * Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 and
++ * only version 2 as published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ */
++#include <linux/kernel.h>
++#include <linux/export.h>
++#include <linux/regmap.h>
++#include <linux/delay.h>
++#include <linux/err.h>
++#include <linux/clk-provider.h>
++#include <linux/spinlock.h>
++
++#include "clk-regmap.h"
++#include "clk-hfpll.h"
++
++#define PLL_OUTCTRL	BIT(0)
++#define PLL_BYPASSNL	BIT(1)
++#define PLL_RESET_N	BIT(2)
++
++/* Initialize a HFPLL at a given rate and enable it. */
++static void __clk_hfpll_init_once(struct clk_hw *hw)
++{
++	struct clk_hfpll *h = to_clk_hfpll(hw);
++	struct hfpll_data const *hd = h->d;
++	struct regmap *regmap = h->clkr.regmap;
++
++	if (likely(h->init_done))
++		return;
++
++	/* Configure PLL parameters for integer mode. */
++	if (hd->config_val)
++		regmap_write(regmap, hd->config_reg, hd->config_val);
++	regmap_write(regmap, hd->m_reg, 0);
++	regmap_write(regmap, hd->n_reg, 1);
++
++	if (hd->user_reg) {
++		u32 regval = hd->user_val;
++		unsigned long rate;
++
++		rate = __clk_get_rate(hw->clk);
++
++		/* Pick the right VCO. */
++		if (hd->user_vco_mask && rate > hd->low_vco_max_rate)
++			regval |= hd->user_vco_mask;
++		regmap_write(regmap, hd->user_reg, regval);
++	}
++
++	if (hd->droop_reg)
++		regmap_write(regmap, hd->droop_reg, hd->droop_val);
++
++	h->init_done = true;
++}
++
++static void __clk_hfpll_enable(struct clk_hw *hw)
++{
++	struct clk_hfpll *h = to_clk_hfpll(hw);
++	struct hfpll_data const *hd = h->d;
++	struct regmap *regmap = h->clkr.regmap;
++	u32 val;
++
++	__clk_hfpll_init_once(hw);
++
++	/* Disable PLL bypass mode. */
++	regmap_update_bits(regmap, hd->mode_reg, PLL_BYPASSNL, PLL_BYPASSNL);
++
++	/*
++	 * H/W requires a 5us delay between disabling the bypass and
++	 * de-asserting the reset. Delay 10us just to be safe.
++	 */
++	udelay(10);
++
++	/* De-assert active-low PLL reset. */
++	regmap_update_bits(regmap, hd->mode_reg, PLL_RESET_N, PLL_RESET_N);
++
++	/* Wait for PLL to lock. */
++	if (hd->status_reg) {
++		do {
++			regmap_read(regmap, hd->status_reg, &val);
++		} while (!(val & BIT(hd->lock_bit)));
++	} else {
++		udelay(60);
++	}
++
++	/* Enable PLL output. */
++	regmap_update_bits(regmap, hd->mode_reg, PLL_OUTCTRL, PLL_OUTCTRL);
++}
++
++/* Enable an already-configured HFPLL. */
++static int clk_hfpll_enable(struct clk_hw *hw)
++{
++	unsigned long flags;
++	struct clk_hfpll *h = to_clk_hfpll(hw);
++	struct hfpll_data const *hd = h->d;
++	struct regmap *regmap = h->clkr.regmap;
++	u32 mode;
++
++	spin_lock_irqsave(&h->lock, flags);
++	regmap_read(regmap, hd->mode_reg, &mode);
++	if (!(mode & (PLL_BYPASSNL | PLL_RESET_N | PLL_OUTCTRL)))
++		__clk_hfpll_enable(hw);
++	spin_unlock_irqrestore(&h->lock, flags);
++
++	return 0;
++}
++
++static void __clk_hfpll_disable(struct clk_hfpll *h)
++{
++	struct hfpll_data const *hd = h->d;
++	struct regmap *regmap = h->clkr.regmap;
++
++	/*
++	 * Disable the PLL output, disable test mode, enable the bypass mode,
++	 * and assert the reset.
++	 */
++	regmap_update_bits(regmap, hd->mode_reg,
++			PLL_BYPASSNL | PLL_RESET_N | PLL_OUTCTRL, 0);
++}
++
++static void clk_hfpll_disable(struct clk_hw *hw)
++{
++	struct clk_hfpll *h = to_clk_hfpll(hw);
++	unsigned long flags;
++
++	spin_lock_irqsave(&h->lock, flags);
++	__clk_hfpll_disable(h);
++	spin_unlock_irqrestore(&h->lock, flags);
++}
++
++static long clk_hfpll_round_rate(struct clk_hw *hw, unsigned long rate,
++				 unsigned long *parent_rate)
++{
++	struct clk_hfpll *h = to_clk_hfpll(hw);
++	struct hfpll_data const *hd = h->d;
++	unsigned long rrate;
++
++	rate = clamp(rate, hd->min_rate, hd->max_rate);
++
++	rrate = DIV_ROUND_UP(rate, *parent_rate) * *parent_rate;
++	if (rrate > hd->max_rate)
++		rrate -= *parent_rate;
++
++	return rrate;
++}
++
++/*
++ * For optimization reasons, assumes no downstream clocks are actively using
++ * it.
++ */
++static int clk_hfpll_set_rate(struct clk_hw *hw, unsigned long rate,
++			      unsigned long parent_rate)
++{
++	struct clk_hfpll *h = to_clk_hfpll(hw);
++	struct hfpll_data const *hd = h->d;
++	struct regmap *regmap = h->clkr.regmap;
++	unsigned long flags;
++	u32 l_val, val;
++	bool enabled;
++
++	l_val = rate / parent_rate;
++
++	spin_lock_irqsave(&h->lock, flags);
++
++	enabled = __clk_is_enabled(hw->clk);
++	if (enabled)
++		__clk_hfpll_disable(h);
++
++	/* Pick the right VCO. */
++	if (hd->user_reg && hd->user_vco_mask) {
++		regmap_read(regmap, hd->user_reg, &val);
++		if (rate <= hd->low_vco_max_rate)
++			val &= ~hd->user_vco_mask;
++		else
++			val |= hd->user_vco_mask;
++		regmap_write(regmap, hd->user_reg, val);
++	}
++
++	regmap_write(regmap, hd->l_reg, l_val);
++
++	if (enabled)
++		__clk_hfpll_enable(hw);
++
++	spin_unlock_irqrestore(&h->lock, flags);
++
++	return 0;
++}
++
++static unsigned long clk_hfpll_recalc_rate(struct clk_hw *hw,
++					   unsigned long parent_rate)
++{
++	struct clk_hfpll *h = to_clk_hfpll(hw);
++	struct hfpll_data const *hd = h->d;
++	struct regmap *regmap = h->clkr.regmap;
++	u32 l_val;
++
++	regmap_read(regmap, hd->l_reg, &l_val);
++
++	return l_val * parent_rate;
++}
++
++static void clk_hfpll_init(struct clk_hw *hw)
++{
++	struct clk_hfpll *h = to_clk_hfpll(hw);
++	struct hfpll_data const *hd = h->d;
++	struct regmap *regmap = h->clkr.regmap;
++	u32 mode, status;
++
++	regmap_read(regmap, hd->mode_reg, &mode);
++	if (mode != (PLL_BYPASSNL | PLL_RESET_N | PLL_OUTCTRL)) {
++		__clk_hfpll_init_once(hw);
++		return;
++	}
++
++	if (hd->status_reg) {
++		regmap_read(regmap, hd->status_reg, &status);
++		if (!(status & BIT(hd->lock_bit))) {
++			WARN(1, "HFPLL %s is ON, but not locked!\n",
++					__clk_get_name(hw->clk));
++			clk_hfpll_disable(hw);
++			__clk_hfpll_init_once(hw);
++		}
++	}
++}
++
++static int hfpll_is_enabled(struct clk_hw *hw)
++{
++	struct clk_hfpll *h = to_clk_hfpll(hw);
++	struct hfpll_data const *hd = h->d;
++	struct regmap *regmap = h->clkr.regmap;
++	u32 mode;
++
++	regmap_read(regmap, hd->mode_reg, &mode);
++	mode &= 0x7;
++	return mode == (PLL_BYPASSNL | PLL_RESET_N | PLL_OUTCTRL);
++}
++
++const struct clk_ops clk_ops_hfpll = {
++	.enable = clk_hfpll_enable,
++	.disable = clk_hfpll_disable,
++	.is_enabled = hfpll_is_enabled,
++	.round_rate = clk_hfpll_round_rate,
++	.set_rate = clk_hfpll_set_rate,
++	.recalc_rate = clk_hfpll_recalc_rate,
++	.init = clk_hfpll_init,
++};
++EXPORT_SYMBOL_GPL(clk_ops_hfpll);
+--- /dev/null
++++ b/drivers/clk/qcom/clk-hfpll.h
+@@ -0,0 +1,54 @@
++/*
++ * Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 and
++ * only version 2 as published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ */
++#ifndef __QCOM_CLK_HFPLL_H__
++#define __QCOM_CLK_HFPLL_H__
++
++#include <linux/clk-provider.h>
++#include <linux/spinlock.h>
++#include "clk-regmap.h"
++
++struct hfpll_data {
++	u32 mode_reg;
++	u32 l_reg;
++	u32 m_reg;
++	u32 n_reg;
++	u32 user_reg;
++	u32 droop_reg;
++	u32 config_reg;
++	u32 status_reg;
++	u8  lock_bit;
++
++	u32 droop_val;
++	u32 config_val;
++	u32 user_val;
++	u32 user_vco_mask;
++	unsigned long low_vco_max_rate;
++
++	unsigned long min_rate;
++	unsigned long max_rate;
++};
++
++struct clk_hfpll {
++	struct hfpll_data const *d;
++	int init_done;
++
++	struct clk_regmap clkr;
++	spinlock_t lock;
++};
++
++#define to_clk_hfpll(_hw) \
++	container_of(to_clk_regmap(_hw), struct clk_hfpll, clkr)
++
++extern const struct clk_ops clk_ops_hfpll;
++
++#endif

target/linux/ipq806x/patches-3.18/138-clk-qcom-Add-HFPLL-driver.patch

@@ -0,0 +1,206 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v3,06/13] clk: qcom: Add HFPLL driver
+From: Stephen Boyd <[email protected]>
+X-Patchwork-Id: 6063231
+Message-Id: <[email protected]>
+To: Mike Turquette <[email protected]>, Stephen Boyd <[email protected]>
+Cc: [email protected], [email protected],
+	[email protected], [email protected],
+	Viresh Kumar <[email protected]>, <[email protected]>
+Date: Fri, 20 Mar 2015 23:45:25 -0700
+
+On some devices (MSM8974 for example), the HFPLLs are
+instantiated within the Krait processor subsystem as separate
+register regions. Add a driver for these PLLs so that we can
+provide HFPLL clocks for use by the system.
+
+Cc: <[email protected]>
+Signed-off-by: Stephen Boyd <[email protected]>
+
+---
+.../devicetree/bindings/clock/qcom,hfpll.txt       |  40 ++++++++
+ drivers/clk/qcom/Kconfig                           |   8 ++
+ drivers/clk/qcom/Makefile                          |   1 +
+ drivers/clk/qcom/hfpll.c                           | 109 +++++++++++++++++++++
+ 4 files changed, 158 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/clock/qcom,hfpll.txt
+ create mode 100644 drivers/clk/qcom/hfpll.c
+
+--- /dev/null
++++ b/Documentation/devicetree/bindings/clock/qcom,hfpll.txt
+@@ -0,0 +1,40 @@
++High-Frequency PLL (HFPLL)
++
++PROPERTIES
++
++- compatible:
++	Usage: required
++	Value type: <string>
++	Definition: must be "qcom,hfpll"
++
++- reg:
++	Usage: required
++	Value type: <prop-encoded-array>
++	Definition: address and size of HPLL registers. An optional second
++		    element specifies the address and size of the alias
++		    register region.
++
++- clock-output-names:
++	Usage: required
++	Value type: <string>
++	Definition: Name of the PLL. Typically hfpllX where X is a CPU number
++		    starting at 0. Otherwise hfpll_Y where Y is more specific
++		    such as "l2".
++
++Example:
++
++1) An HFPLL for the L2 cache.
++
++	clock-controller@f9016000 {
++		compatible = "qcom,hfpll";
++		reg = <0xf9016000 0x30>;
++		clock-output-names = "hfpll_l2";
++	};
++
++2) An HFPLL for CPU0. This HFPLL has the alias register region.
++
++	clock-controller@f908a000 {
++		compatible = "qcom,hfpll";
++		reg = <0xf908a000 0x30>, <0xf900a000 0x30>;
++		clock-output-names = "hfpll0";
++	};
+--- a/drivers/clk/qcom/Kconfig
++++ b/drivers/clk/qcom/Kconfig
+@@ -70,3 +70,11 @@ config MSM_MMCC_8974
+ 	  Support for the multimedia clock controller on msm8974 devices.
+ 	  Say Y if you want to support multimedia devices such as display,
+ 	  graphics, video encode/decode, camera, etc.
++
++config QCOM_HFPLL
++	tristate "High-Frequency PLL (HFPLL) Clock Controller"
++	depends on COMMON_CLK_QCOM
++	help
++	  Support for the high-frequency PLLs present on Qualcomm devices.
++	  Say Y if you want to support CPU frequency scaling on devices
++	  such as MSM8974, APQ8084, etc.
+--- a/drivers/clk/qcom/Makefile
++++ b/drivers/clk/qcom/Makefile
+@@ -17,3 +17,4 @@ obj-$(CONFIG_MSM_GCC_8960) += gcc-msm896
+ obj-$(CONFIG_MSM_GCC_8974) += gcc-msm8974.o
+ obj-$(CONFIG_MSM_MMCC_8960) += mmcc-msm8960.o
+ obj-$(CONFIG_MSM_MMCC_8974) += mmcc-msm8974.o
++obj-$(CONFIG_QCOM_HFPLL) += hfpll.o
+--- /dev/null
++++ b/drivers/clk/qcom/hfpll.c
+@@ -0,0 +1,109 @@
++/*
++ * Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 and
++ * only version 2 as published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ */
++
++#include <linux/kernel.h>
++#include <linux/init.h>
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/of.h>
++#include <linux/clk.h>
++#include <linux/clk-provider.h>
++#include <linux/regmap.h>
++
++#include "clk-regmap.h"
++#include "clk-hfpll.h"
++
++static const struct hfpll_data hdata = {
++	.mode_reg = 0x00,
++	.l_reg = 0x04,
++	.m_reg = 0x08,
++	.n_reg = 0x0c,
++	.user_reg = 0x10,
++	.config_reg = 0x14,
++	.config_val = 0x430405d,
++	.status_reg = 0x1c,
++	.lock_bit = 16,
++
++	.user_val = 0x8,
++	.user_vco_mask = 0x100000,
++	.low_vco_max_rate = 1248000000,
++	.min_rate = 537600000UL,
++	.max_rate = 2900000000UL,
++};
++
++static const struct of_device_id qcom_hfpll_match_table[] = {
++	{ .compatible = "qcom,hfpll" },
++	{ }
++};
++MODULE_DEVICE_TABLE(of, qcom_hfpll_match_table);
++
++static const struct regmap_config hfpll_regmap_config = {
++	.reg_bits	= 32,
++	.reg_stride	= 4,
++	.val_bits	= 32,
++	.max_register	= 0x30,
++	.fast_io	= true,
++};
++
++static int qcom_hfpll_probe(struct platform_device *pdev)
++{
++	struct clk *clk;
++	struct resource *res;
++	struct device *dev = &pdev->dev;
++	void __iomem *base;
++	struct regmap *regmap;
++	struct clk_hfpll *h;
++	struct clk_init_data init = {
++		.parent_names = (const char *[]){ "xo" },
++		.num_parents = 1,
++		.ops = &clk_ops_hfpll,
++	};
++
++	h = devm_kzalloc(dev, sizeof(*h), GFP_KERNEL);
++	if (!h)
++		return -ENOMEM;
++
++	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++	base = devm_ioremap_resource(dev, res);
++	if (IS_ERR(base))
++		return PTR_ERR(base);
++
++	regmap = devm_regmap_init_mmio(&pdev->dev, base, &hfpll_regmap_config);
++	if (IS_ERR(regmap))
++		return PTR_ERR(regmap);
++
++	if (of_property_read_string_index(dev->of_node, "clock-output-names",
++						  0, &init.name))
++		return -ENODEV;
++
++	h->d = &hdata;
++	h->clkr.hw.init = &init;
++	spin_lock_init(&h->lock);
++
++	clk = devm_clk_register_regmap(&pdev->dev, &h->clkr);
++
++	return PTR_ERR_OR_ZERO(clk);
++}
++
++static struct platform_driver qcom_hfpll_driver = {
++	.probe		= qcom_hfpll_probe,
++	.driver		= {
++		.name	= "qcom-hfpll",
++		.of_match_table = qcom_hfpll_match_table,
++	},
++};
++module_platform_driver(qcom_hfpll_driver);
++
++MODULE_DESCRIPTION("QCOM HFPLL Clock Driver");
++MODULE_LICENSE("GPL v2");
++MODULE_ALIAS("platform:qcom-hfpll");

target/linux/ipq806x/patches-3.18/139-clk-qcom-Add-IPQ806X-s-HFPLLs.patch

@@ -0,0 +1,127 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v3,08/13] clk: qcom: Add IPQ806X's HFPLLs
+From: Stephen Boyd <[email protected]>
+X-Patchwork-Id: 6063241
+Message-Id: <[email protected]>
+To: Mike Turquette <[email protected]>, Stephen Boyd <[email protected]>
+Cc: [email protected], [email protected],
+	[email protected], [email protected],
+	Viresh Kumar <[email protected]>
+Date: Fri, 20 Mar 2015 23:45:27 -0700
+
+Describe the HFPLLs present on IPQ806X devices.
+
+Signed-off-by: Stephen Boyd <[email protected]>
+
+---
+drivers/clk/qcom/gcc-ipq806x.c | 83 ++++++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 83 insertions(+)
+
+--- a/drivers/clk/qcom/gcc-ipq806x.c
++++ b/drivers/clk/qcom/gcc-ipq806x.c
+@@ -30,6 +30,7 @@
+ #include "clk-pll.h"
+ #include "clk-rcg.h"
+ #include "clk-branch.h"
++#include "clk-hfpll.h"
+ #include "reset.h"
+ 
+ static struct clk_pll pll0 = {
+@@ -102,6 +103,85 @@ static struct clk_regmap pll8_vote = {
+ 	},
+ };
+ 
++static struct hfpll_data hfpll0_data = {
++	.mode_reg = 0x3200,
++	.l_reg = 0x3208,
++	.m_reg = 0x320c,
++	.n_reg = 0x3210,
++	.config_reg = 0x3204,
++	.status_reg = 0x321c,
++	.config_val = 0x7845c665,
++	.droop_reg = 0x3214,
++	.droop_val = 0x0108c000,
++	.min_rate = 600000000UL,
++	.max_rate = 1800000000UL,
++};
++
++static struct clk_hfpll hfpll0 = {
++	.d = &hfpll0_data,
++	.clkr.hw.init = &(struct clk_init_data){
++		.parent_names = (const char *[]){ "pxo" },
++		.num_parents = 1,
++		.name = "hfpll0",
++		.ops = &clk_ops_hfpll,
++		.flags = CLK_IGNORE_UNUSED,
++	},
++	.lock = __SPIN_LOCK_UNLOCKED(hfpll0.lock),
++};
++
++static struct hfpll_data hfpll1_data = {
++	.mode_reg = 0x3240,
++	.l_reg = 0x3248,
++	.m_reg = 0x324c,
++	.n_reg = 0x3250,
++	.config_reg = 0x3244,
++	.status_reg = 0x325c,
++	.config_val = 0x7845c665,
++	.droop_reg = 0x3314,
++	.droop_val = 0x0108c000,
++	.min_rate = 600000000UL,
++	.max_rate = 1800000000UL,
++};
++
++static struct clk_hfpll hfpll1 = {
++	.d = &hfpll1_data,
++	.clkr.hw.init = &(struct clk_init_data){
++		.parent_names = (const char *[]){ "pxo" },
++		.num_parents = 1,
++		.name = "hfpll1",
++		.ops = &clk_ops_hfpll,
++		.flags = CLK_IGNORE_UNUSED,
++	},
++	.lock = __SPIN_LOCK_UNLOCKED(hfpll1.lock),
++};
++
++static struct hfpll_data hfpll_l2_data = {
++	.mode_reg = 0x3300,
++	.l_reg = 0x3308,
++	.m_reg = 0x330c,
++	.n_reg = 0x3310,
++	.config_reg = 0x3304,
++	.status_reg = 0x331c,
++	.config_val = 0x7845c665,
++	.droop_reg = 0x3314,
++	.droop_val = 0x0108c000,
++	.min_rate = 600000000UL,
++	.max_rate = 1800000000UL,
++};
++
++static struct clk_hfpll hfpll_l2 = {
++	.d = &hfpll_l2_data,
++	.clkr.hw.init = &(struct clk_init_data){
++		.parent_names = (const char *[]){ "pxo" },
++		.num_parents = 1,
++		.name = "hfpll_l2",
++		.ops = &clk_ops_hfpll,
++		.flags = CLK_IGNORE_UNUSED,
++	},
++	.lock = __SPIN_LOCK_UNLOCKED(hfpll_l2.lock),
++};
++
++
+ static struct clk_pll pll14 = {
+ 	.l_reg = 0x31c4,
+ 	.m_reg = 0x31c8,
+@@ -2261,6 +2341,9 @@ static struct clk_regmap *gcc_ipq806x_cl
+ 	[USB_FS1_XCVR_SRC] = &usb_fs1_xcvr_clk_src.clkr,
+ 	[USB_FS1_XCVR_CLK] = &usb_fs1_xcvr_clk.clkr,
+ 	[USB_FS1_SYSTEM_CLK] = &usb_fs1_sys_clk.clkr,
++	[PLL9] = &hfpll0.clkr,
++	[PLL10] = &hfpll1.clkr,
++	[PLL12] = &hfpll_l2.clkr,
+ };
+ 
+ static const struct qcom_reset_map gcc_ipq806x_resets[] = {

target/linux/ipq806x/patches-3.18/140-clk-qcom-Add-support-for-Krait-clocks.patch

@@ -0,0 +1,271 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v3,09/13] clk: qcom: Add support for Krait clocks
+From: Stephen Boyd <[email protected]>
+X-Patchwork-Id: 6063251
+Message-Id: <[email protected]>
+To: Mike Turquette <[email protected]>, Stephen Boyd <[email protected]>
+Cc: [email protected], [email protected],
+	[email protected], [email protected],
+	Viresh Kumar <[email protected]>
+Date: Fri, 20 Mar 2015 23:45:28 -0700
+
+The Krait clocks are made up of a series of muxes and a divider
+that choose between a fixed rate clock and dedicated HFPLLs for
+each CPU. Instead of using mmio accesses to remux parents, the
+Krait implementation exposes the remux control via cp15
+registers. Support these clocks.
+
+Signed-off-by: Stephen Boyd <[email protected]>
+
+---
+drivers/clk/qcom/Kconfig     |   4 ++
+ drivers/clk/qcom/Makefile    |   1 +
+ drivers/clk/qcom/clk-krait.c | 166 +++++++++++++++++++++++++++++++++++++++++++
+ drivers/clk/qcom/clk-krait.h |  49 +++++++++++++
+ 4 files changed, 220 insertions(+)
+ create mode 100644 drivers/clk/qcom/clk-krait.c
+ create mode 100644 drivers/clk/qcom/clk-krait.h
+
+--- a/drivers/clk/qcom/Kconfig
++++ b/drivers/clk/qcom/Kconfig
+@@ -78,3 +78,7 @@ config QCOM_HFPLL
+ 	  Support for the high-frequency PLLs present on Qualcomm devices.
+ 	  Say Y if you want to support CPU frequency scaling on devices
+ 	  such as MSM8974, APQ8084, etc.
++
++config KRAIT_CLOCKS
++	bool
++	select KRAIT_L2_ACCESSORS
+--- a/drivers/clk/qcom/Makefile
++++ b/drivers/clk/qcom/Makefile
+@@ -6,6 +6,7 @@ clk-qcom-y += clk-pll.o
+ clk-qcom-y += clk-rcg.o
+ clk-qcom-y += clk-rcg2.o
+ clk-qcom-y += clk-branch.o
++clk-qcom-$(CONFIG_KRAIT_CLOCKS) += clk-krait.o
+ clk-qcom-y += clk-hfpll.o
+ clk-qcom-y += reset.o
+ 
+--- /dev/null
++++ b/drivers/clk/qcom/clk-krait.c
+@@ -0,0 +1,166 @@
++/*
++ * Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 and
++ * only version 2 as published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ */
++
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/io.h>
++#include <linux/delay.h>
++#include <linux/err.h>
++#include <linux/clk-provider.h>
++#include <linux/spinlock.h>
++
++#include <asm/krait-l2-accessors.h>
++
++#include "clk-krait.h"
++
++/* Secondary and primary muxes share the same cp15 register */
++static DEFINE_SPINLOCK(krait_clock_reg_lock);
++
++#define LPL_SHIFT	8
++static void __krait_mux_set_sel(struct krait_mux_clk *mux, int sel)
++{
++	unsigned long flags;
++	u32 regval;
++
++	spin_lock_irqsave(&krait_clock_reg_lock, flags);
++	regval = krait_get_l2_indirect_reg(mux->offset);
++	regval &= ~(mux->mask << mux->shift);
++	regval |= (sel & mux->mask) << mux->shift;
++	if (mux->lpl) {
++		regval &= ~(mux->mask << (mux->shift + LPL_SHIFT));
++		regval |= (sel & mux->mask) << (mux->shift + LPL_SHIFT);
++	}
++	krait_set_l2_indirect_reg(mux->offset, regval);
++	spin_unlock_irqrestore(&krait_clock_reg_lock, flags);
++
++	/* Wait for switch to complete. */
++	mb();
++	udelay(1);
++}
++
++static int krait_mux_set_parent(struct clk_hw *hw, u8 index)
++{
++	struct krait_mux_clk *mux = to_krait_mux_clk(hw);
++	u32 sel;
++
++	sel = clk_mux_reindex(index, mux->parent_map, 0);
++	mux->en_mask = sel;
++	/* Don't touch mux if CPU is off as it won't work */
++	if (__clk_is_enabled(hw->clk))
++		__krait_mux_set_sel(mux, sel);
++	return 0;
++}
++
++static u8 krait_mux_get_parent(struct clk_hw *hw)
++{
++	struct krait_mux_clk *mux = to_krait_mux_clk(hw);
++	u32 sel;
++
++	sel = krait_get_l2_indirect_reg(mux->offset);
++	sel >>= mux->shift;
++	sel &= mux->mask;
++	mux->en_mask = sel;
++
++	return clk_mux_get_parent(hw, sel, mux->parent_map, 0);
++}
++
++static struct clk_hw *krait_mux_get_safe_parent(struct clk_hw *hw)
++{
++	int i;
++	struct krait_mux_clk *mux = to_krait_mux_clk(hw);
++	int num_parents = __clk_get_num_parents(hw->clk);
++
++	i = mux->safe_sel;
++	for (i = 0; i < num_parents; i++)
++		if (mux->safe_sel == mux->parent_map[i])
++			break;
++
++	return __clk_get_hw(clk_get_parent_by_index(hw->clk, i));
++}
++
++static int krait_mux_enable(struct clk_hw *hw)
++{
++	struct krait_mux_clk *mux = to_krait_mux_clk(hw);
++
++	__krait_mux_set_sel(mux, mux->en_mask);
++
++	return 0;
++}
++
++static void krait_mux_disable(struct clk_hw *hw)
++{
++	struct krait_mux_clk *mux = to_krait_mux_clk(hw);
++
++	__krait_mux_set_sel(mux, mux->safe_sel);
++}
++
++const struct clk_ops krait_mux_clk_ops = {
++	.enable = krait_mux_enable,
++	.disable = krait_mux_disable,
++	.set_parent = krait_mux_set_parent,
++	.get_parent = krait_mux_get_parent,
++	.determine_rate = __clk_mux_determine_rate_closest,
++	.get_safe_parent = krait_mux_get_safe_parent,
++};
++EXPORT_SYMBOL_GPL(krait_mux_clk_ops);
++
++/* The divider can divide by 2, 4, 6 and 8. But we only really need div-2. */
++static long krait_div2_round_rate(struct clk_hw *hw, unsigned long rate,
++				  unsigned long *parent_rate)
++{
++	*parent_rate = __clk_round_rate(__clk_get_parent(hw->clk), rate * 2);
++	return DIV_ROUND_UP(*parent_rate, 2);
++}
++
++static int krait_div2_set_rate(struct clk_hw *hw, unsigned long rate,
++			unsigned long parent_rate)
++{
++	struct krait_div2_clk *d = to_krait_div2_clk(hw);
++	unsigned long flags;
++	u32 val;
++	u32 mask = BIT(d->width) - 1;
++
++	if (d->lpl)
++		mask = mask << (d->shift + LPL_SHIFT) | mask << d->shift;
++
++	spin_lock_irqsave(&krait_clock_reg_lock, flags);
++	val = krait_get_l2_indirect_reg(d->offset);
++	val &= ~mask;
++	krait_set_l2_indirect_reg(d->offset, val);
++	spin_unlock_irqrestore(&krait_clock_reg_lock, flags);
++
++	return 0;
++}
++
++static unsigned long
++krait_div2_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
++{
++	struct krait_div2_clk *d = to_krait_div2_clk(hw);
++	u32 mask = BIT(d->width) - 1;
++	u32 div;
++
++	div = krait_get_l2_indirect_reg(d->offset);
++	div >>= d->shift;
++	div &= mask;
++	div = (div + 1) * 2;
++
++	return DIV_ROUND_UP(parent_rate, div);
++}
++
++const struct clk_ops krait_div2_clk_ops = {
++	.round_rate = krait_div2_round_rate,
++	.set_rate = krait_div2_set_rate,
++	.recalc_rate = krait_div2_recalc_rate,
++};
++EXPORT_SYMBOL_GPL(krait_div2_clk_ops);
+--- /dev/null
++++ b/drivers/clk/qcom/clk-krait.h
+@@ -0,0 +1,49 @@
++/*
++ * Copyright (c) 2013, The Linux Foundation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 and
++ * only version 2 as published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ */
++
++#ifndef __QCOM_CLK_KRAIT_H
++#define __QCOM_CLK_KRAIT_H
++
++#include <linux/clk-provider.h>
++
++struct krait_mux_clk {
++	unsigned int	*parent_map;
++	bool		has_safe_parent;
++	u8		safe_sel;
++	u32		offset;
++	u32		mask;
++	u32		shift;
++	u32		en_mask;
++	bool		lpl;
++
++	struct clk_hw	hw;
++};
++
++#define to_krait_mux_clk(_hw) container_of(_hw, struct krait_mux_clk, hw)
++
++extern const struct clk_ops krait_mux_clk_ops;
++
++struct krait_div2_clk {
++	u32		offset;
++	u8		width;
++	u32		shift;
++	bool		lpl;
++
++	struct clk_hw	hw;
++};
++
++#define to_krait_div2_clk(_hw) container_of(_hw, struct krait_div2_clk, hw)
++
++extern const struct clk_ops krait_div2_clk_ops;
++
++#endif

target/linux/ipq806x/patches-3.18/141-clk-qcom-Add-KPSS-ACC-GCC-driver.patch

@@ -0,0 +1,205 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v3,10/13] clk: qcom: Add KPSS ACC/GCC driver
+From: Stephen Boyd <[email protected]>
+X-Patchwork-Id: 6063201
+Message-Id: <[email protected]>
+To: Mike Turquette <[email protected]>, Stephen Boyd <[email protected]>
+Cc: [email protected], [email protected],
+	[email protected], [email protected],
+	Viresh Kumar <[email protected]>, <[email protected]>
+Date: Fri, 20 Mar 2015 23:45:29 -0700
+
+The ACC and GCC regions present in KPSSv1 contain registers to
+control clocks and power to each Krait CPU and L2. For CPUfreq
+purposes probe these devices and expose a mux clock that chooses
+between PXO and PLL8.
+
+Cc: <[email protected]>
+Signed-off-by: Stephen Boyd <[email protected]>
+
+---
+.../devicetree/bindings/arm/msm/qcom,kpss-acc.txt  |  7 ++
+ .../devicetree/bindings/arm/msm/qcom,kpss-gcc.txt  | 28 +++++++
+ drivers/clk/qcom/Kconfig                           |  8 ++
+ drivers/clk/qcom/Makefile                          |  1 +
+ drivers/clk/qcom/kpss-xcc.c                        | 95 ++++++++++++++++++++++
+ 5 files changed, 139 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/arm/msm/qcom,kpss-gcc.txt
+ create mode 100644 drivers/clk/qcom/kpss-xcc.c
+
+--- a/Documentation/devicetree/bindings/arm/msm/qcom,kpss-acc.txt
++++ b/Documentation/devicetree/bindings/arm/msm/qcom,kpss-acc.txt
+@@ -21,10 +21,17 @@ PROPERTIES
+ 		    the register region. An optional second element specifies
+ 		    the base address and size of the alias register region.
+ 
++- clock-output-names:
++	Usage: optional
++	Value type: <string>
++	Definition: Name of the output clock. Typically acpuX_aux where X is a
++		    CPU number starting at 0.
++
+ Example:
+ 
+ 	clock-controller@2088000 {
+ 		compatible = "qcom,kpss-acc-v2";
+ 		reg = <0x02088000 0x1000>,
+ 		      <0x02008000 0x1000>;
++		clock-output-names = "acpu0_aux";
+ 	};
+--- /dev/null
++++ b/Documentation/devicetree/bindings/arm/msm/qcom,kpss-gcc.txt
+@@ -0,0 +1,28 @@
++Krait Processor Sub-system (KPSS) Global Clock Controller (GCC)
++
++PROPERTIES
++
++- compatible:
++	Usage: required
++	Value type: <string>
++	Definition: should be one of:
++			"qcom,kpss-gcc"
++
++- reg:
++	Usage: required
++	Value type: <prop-encoded-array>
++	Definition: base address and size of the register region
++
++- clock-output-names:
++	Usage: required
++	Value type: <string>
++	Definition: Name of the output clock. Typically acpu_l2_aux indicating
++		    an L2 cache auxiliary clock.
++
++Example:
++
++	l2cc: clock-controller@2011000 {
++		compatible = "qcom,kpss-gcc";
++		reg = <0x2011000 0x1000>;
++		clock-output-names = "acpu_l2_aux";
++	};
+--- a/drivers/clk/qcom/Kconfig
++++ b/drivers/clk/qcom/Kconfig
+@@ -79,6 +79,14 @@ config QCOM_HFPLL
+ 	  Say Y if you want to support CPU frequency scaling on devices
+ 	  such as MSM8974, APQ8084, etc.
+ 
++config KPSS_XCC
++	tristate "KPSS Clock Controller"
++	depends on COMMON_CLK_QCOM
++	help
++	  Support for the Krait ACC and GCC clock controllers. Say Y
++	  if you want to support CPU frequency scaling on devices such
++	  as MSM8960, APQ8064, etc.
++
+ config KRAIT_CLOCKS
+ 	bool
+ 	select KRAIT_L2_ACCESSORS
+--- a/drivers/clk/qcom/Makefile
++++ b/drivers/clk/qcom/Makefile
+@@ -18,4 +18,5 @@ obj-$(CONFIG_MSM_GCC_8960) += gcc-msm896
+ obj-$(CONFIG_MSM_GCC_8974) += gcc-msm8974.o
+ obj-$(CONFIG_MSM_MMCC_8960) += mmcc-msm8960.o
+ obj-$(CONFIG_MSM_MMCC_8974) += mmcc-msm8974.o
++obj-$(CONFIG_KPSS_XCC) += kpss-xcc.o
+ obj-$(CONFIG_QCOM_HFPLL) += hfpll.o
+--- /dev/null
++++ b/drivers/clk/qcom/kpss-xcc.c
+@@ -0,0 +1,95 @@
++/* Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 and
++ * only version 2 as published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ */
++
++#include <linux/kernel.h>
++#include <linux/init.h>
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/err.h>
++#include <linux/io.h>
++#include <linux/of.h>
++#include <linux/of_device.h>
++#include <linux/clk.h>
++#include <linux/clk-provider.h>
++
++static const char *aux_parents[] = {
++	"pll8_vote",
++	"pxo",
++};
++
++static unsigned int aux_parent_map[] = {
++	3,
++	0,
++};
++
++static const struct of_device_id kpss_xcc_match_table[] = {
++	{ .compatible = "qcom,kpss-acc-v1", .data = (void *)1UL },
++	{ .compatible = "qcom,kpss-gcc" },
++	{}
++};
++MODULE_DEVICE_TABLE(of, kpss_xcc_match_table);
++
++static int kpss_xcc_driver_probe(struct platform_device *pdev)
++{
++	const struct of_device_id *id;
++	struct clk *clk;
++	struct resource *res;
++	void __iomem *base;
++	const char *name;
++
++	id = of_match_device(kpss_xcc_match_table, &pdev->dev);
++	if (!id)
++		return -ENODEV;
++
++	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++	base = devm_ioremap_resource(&pdev->dev, res);
++	if (IS_ERR(base))
++		return PTR_ERR(base);
++
++	if (id->data) {
++		if (of_property_read_string_index(pdev->dev.of_node,
++					"clock-output-names", 0, &name))
++			return -ENODEV;
++		base += 0x14;
++	} else {
++		name = "acpu_l2_aux";
++		base += 0x28;
++	}
++
++	clk = clk_register_mux_table(&pdev->dev, name, aux_parents,
++				     ARRAY_SIZE(aux_parents), 0, base, 0, 0x3,
++				     0, aux_parent_map, NULL);
++
++	platform_set_drvdata(pdev, clk);
++
++	return PTR_ERR_OR_ZERO(clk);
++}
++
++static int kpss_xcc_driver_remove(struct platform_device *pdev)
++{
++	clk_unregister_mux(platform_get_drvdata(pdev));
++	return 0;
++}
++
++static struct platform_driver kpss_xcc_driver = {
++	.probe = kpss_xcc_driver_probe,
++	.remove = kpss_xcc_driver_remove,
++	.driver = {
++		.name = "kpss-xcc",
++		.of_match_table = kpss_xcc_match_table,
++	},
++};
++module_platform_driver(kpss_xcc_driver);
++
++MODULE_DESCRIPTION("Krait Processor Sub System (KPSS) Clock Driver");
++MODULE_LICENSE("GPL v2");
++MODULE_ALIAS("platform:kpss-xcc");

target/linux/ipq806x/patches-3.18/142-clk-qcom-Add-Krait-clock-controller-driver.patch

@@ -0,0 +1,435 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v3,11/13] clk: qcom: Add Krait clock controller driver
+From: Stephen Boyd <[email protected]>
+X-Patchwork-Id: 6063121
+Message-Id: <[email protected]>
+To: Mike Turquette <[email protected]>, Stephen Boyd <[email protected]>
+Cc: [email protected], [email protected],
+	[email protected], [email protected],
+	Viresh Kumar <[email protected]>, <[email protected]>
+Date: Fri, 20 Mar 2015 23:45:30 -0700
+
+The Krait CPU clocks are made up of a primary mux and secondary
+mux for each CPU and the L2, controlled via cp15 accessors. For
+Kraits within KPSSv1 each secondary mux accepts a different aux
+source, but on KPSSv2 each secondary mux accepts the same aux
+source.
+
+Cc: <[email protected]>
+Signed-off-by: Stephen Boyd <[email protected]>
+
+---
+.../devicetree/bindings/clock/qcom,krait-cc.txt    |  22 ++
+ drivers/clk/qcom/Kconfig                           |   8 +
+ drivers/clk/qcom/Makefile                          |   1 +
+ drivers/clk/qcom/krait-cc.c                        | 352 +++++++++++++++++++++
+ 4 files changed, 383 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/clock/qcom,krait-cc.txt
+ create mode 100644 drivers/clk/qcom/krait-cc.c
+
+--- /dev/null
++++ b/Documentation/devicetree/bindings/clock/qcom,krait-cc.txt
+@@ -0,0 +1,22 @@
++Krait Clock Controller
++
++PROPERTIES
++
++- compatible:
++	Usage: required
++	Value type: <string>
++	Definition: must be one of:
++			"qcom,krait-cc-v1"
++			"qcom,krait-cc-v2"
++
++- #clock-cells:
++	Usage: required
++	Value type: <u32>
++	Definition: must be 1
++
++Example:
++
++	kraitcc: clock-controller {
++		compatible = "qcom,krait-cc-v1";
++		#clock-cells = <1>;
++	};
+--- a/drivers/clk/qcom/Kconfig
++++ b/drivers/clk/qcom/Kconfig
+@@ -87,6 +87,14 @@ config KPSS_XCC
+ 	  if you want to support CPU frequency scaling on devices such
+ 	  as MSM8960, APQ8064, etc.
+ 
++config KRAITCC
++	tristate "Krait Clock Controller"
++	depends on COMMON_CLK_QCOM && ARM
++	select KRAIT_CLOCKS
++	help
++	  Support for the Krait CPU clocks on Qualcomm devices.
++	  Say Y if you want to support CPU frequency scaling.
++
+ config KRAIT_CLOCKS
+ 	bool
+ 	select KRAIT_L2_ACCESSORS
+--- a/drivers/clk/qcom/Makefile
++++ b/drivers/clk/qcom/Makefile
+@@ -20,3 +20,4 @@ obj-$(CONFIG_MSM_MMCC_8960) += mmcc-msm8
+ obj-$(CONFIG_MSM_MMCC_8974) += mmcc-msm8974.o
+ obj-$(CONFIG_KPSS_XCC) += kpss-xcc.o
+ obj-$(CONFIG_QCOM_HFPLL) += hfpll.o
++obj-$(CONFIG_KRAITCC) += krait-cc.o
+--- /dev/null
++++ b/drivers/clk/qcom/krait-cc.c
+@@ -0,0 +1,352 @@
++/* Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 and
++ * only version 2 as published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ */
++
++#include <linux/kernel.h>
++#include <linux/init.h>
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/err.h>
++#include <linux/io.h>
++#include <linux/of.h>
++#include <linux/of_device.h>
++#include <linux/clk.h>
++#include <linux/clk-provider.h>
++#include <linux/slab.h>
++
++#include "clk-krait.h"
++
++static unsigned int sec_mux_map[] = {
++	2,
++	0,
++};
++
++static unsigned int pri_mux_map[] = {
++	1,
++	2,
++	0,
++};
++
++static int
++krait_add_div(struct device *dev, int id, const char *s, unsigned offset)
++{
++	struct krait_div2_clk *div;
++	struct clk_init_data init = {
++		.num_parents = 1,
++		.ops = &krait_div2_clk_ops,
++		.flags = CLK_SET_RATE_PARENT,
++	};
++	const char *p_names[1];
++	struct clk *clk;
++
++	div = devm_kzalloc(dev, sizeof(*div), GFP_KERNEL);
++	if (!div)
++		return -ENOMEM;
++
++	div->width = 2;
++	div->shift = 6;
++	div->lpl = id >= 0;
++	div->offset = offset;
++	div->hw.init = &init;
++
++	init.name = kasprintf(GFP_KERNEL, "hfpll%s_div", s);
++	if (!init.name)
++		return -ENOMEM;
++
++	init.parent_names = p_names;
++	p_names[0] = kasprintf(GFP_KERNEL, "hfpll%s", s);
++	if (!p_names[0]) {
++		kfree(init.name);
++		return -ENOMEM;
++	}
++
++	clk = devm_clk_register(dev, &div->hw);
++	kfree(p_names[0]);
++	kfree(init.name);
++
++	return PTR_ERR_OR_ZERO(clk);
++}
++
++static int
++krait_add_sec_mux(struct device *dev, int id, const char *s, unsigned offset,
++		  bool unique_aux)
++{
++	struct krait_mux_clk *mux;
++	static const char *sec_mux_list[] = {
++		"acpu_aux",
++		"qsb",
++	};
++	struct clk_init_data init = {
++		.parent_names = sec_mux_list,
++		.num_parents = ARRAY_SIZE(sec_mux_list),
++		.ops = &krait_mux_clk_ops,
++		.flags = CLK_SET_RATE_PARENT,
++	};
++	struct clk *clk;
++
++	mux = devm_kzalloc(dev, sizeof(*mux), GFP_KERNEL);
++	if (!mux)
++		return -ENOMEM;
++
++	mux->offset = offset;
++	mux->lpl = id >= 0;
++	mux->has_safe_parent = true;
++	mux->safe_sel = 2;
++	mux->mask = 0x3;
++	mux->shift = 2;
++	mux->parent_map = sec_mux_map;
++	mux->hw.init = &init;
++
++	init.name = kasprintf(GFP_KERNEL, "krait%s_sec_mux", s);
++	if (!init.name)
++		return -ENOMEM;
++
++	if (unique_aux) {
++		sec_mux_list[0] = kasprintf(GFP_KERNEL, "acpu%s_aux", s);
++		if (!sec_mux_list[0]) {
++			clk = ERR_PTR(-ENOMEM);
++			goto err_aux;
++		}
++	}
++
++	clk = devm_clk_register(dev, &mux->hw);
++
++	if (unique_aux)
++		kfree(sec_mux_list[0]);
++err_aux:
++	kfree(init.name);
++	return PTR_ERR_OR_ZERO(clk);
++}
++
++static struct clk *
++krait_add_pri_mux(struct device *dev, int id, const char *s, unsigned offset)
++{
++	struct krait_mux_clk *mux;
++	const char *p_names[3];
++	struct clk_init_data init = {
++		.parent_names = p_names,
++		.num_parents = ARRAY_SIZE(p_names),
++		.ops = &krait_mux_clk_ops,
++		.flags = CLK_SET_RATE_PARENT,
++	};
++	struct clk *clk;
++
++	mux = devm_kzalloc(dev, sizeof(*mux), GFP_KERNEL);
++	if (!mux)
++		return ERR_PTR(-ENOMEM);
++
++	mux->has_safe_parent = true;
++	mux->safe_sel = 0;
++	mux->mask = 0x3;
++	mux->shift = 0;
++	mux->offset = offset;
++	mux->lpl = id >= 0;
++	mux->parent_map = pri_mux_map;
++	mux->hw.init = &init;
++
++	init.name = kasprintf(GFP_KERNEL, "krait%s_pri_mux", s);
++	if (!init.name)
++		return ERR_PTR(-ENOMEM);
++
++	p_names[0] = kasprintf(GFP_KERNEL, "hfpll%s", s);
++	if (!p_names[0]) {
++		clk = ERR_PTR(-ENOMEM);
++		goto err_p0;
++	}
++
++	p_names[1] = kasprintf(GFP_KERNEL, "hfpll%s_div", s);
++	if (!p_names[1]) {
++		clk = ERR_PTR(-ENOMEM);
++		goto err_p1;
++	}
++
++	p_names[2] = kasprintf(GFP_KERNEL, "krait%s_sec_mux", s);
++	if (!p_names[2]) {
++		clk = ERR_PTR(-ENOMEM);
++		goto err_p2;
++	}
++
++	clk = devm_clk_register(dev, &mux->hw);
++
++	kfree(p_names[2]);
++err_p2:
++	kfree(p_names[1]);
++err_p1:
++	kfree(p_names[0]);
++err_p0:
++	kfree(init.name);
++	return clk;
++}
++
++/* id < 0 for L2, otherwise id == physical CPU number */
++static struct clk *krait_add_clks(struct device *dev, int id, bool unique_aux)
++{
++	int ret;
++	unsigned offset;
++	void *p = NULL;
++	const char *s;
++	struct clk *clk;
++
++	if (id >= 0) {
++		offset = 0x4501 + (0x1000 * id);
++		s = p = kasprintf(GFP_KERNEL, "%d", id);
++		if (!s)
++			return ERR_PTR(-ENOMEM);
++	} else {
++		offset = 0x500;
++		s = "_l2";
++	}
++
++	ret = krait_add_div(dev, id, s, offset);
++	if (ret) {
++		clk = ERR_PTR(ret);
++		goto err;
++	}
++
++	ret = krait_add_sec_mux(dev, id, s, offset, unique_aux);
++	if (ret) {
++		clk = ERR_PTR(ret);
++		goto err;
++	}
++
++	clk = krait_add_pri_mux(dev, id, s, offset);
++err:
++	kfree(p);
++	return clk;
++}
++
++static struct clk *krait_of_get(struct of_phandle_args *clkspec, void *data)
++{
++	unsigned int idx = clkspec->args[0];
++	struct clk **clks = data;
++
++	if (idx >= 5) {
++		pr_err("%s: invalid clock index %d\n", __func__, idx);
++		return ERR_PTR(-EINVAL);
++	}
++
++	return clks[idx] ? : ERR_PTR(-ENODEV);
++}
++
++static const struct of_device_id krait_cc_match_table[] = {
++	{ .compatible = "qcom,krait-cc-v1", (void *)1UL },
++	{ .compatible = "qcom,krait-cc-v2" },
++	{}
++};
++MODULE_DEVICE_TABLE(of, krait_cc_match_table);
++
++static int krait_cc_probe(struct platform_device *pdev)
++{
++	struct device *dev = &pdev->dev;
++	const struct of_device_id *id;
++	unsigned long cur_rate, aux_rate;
++	int cpu;
++	struct clk *clk;
++	struct clk **clks;
++	struct clk *l2_pri_mux_clk;
++
++	id = of_match_device(krait_cc_match_table, dev);
++	if (!id)
++		return -ENODEV;
++
++	/* Rate is 1 because 0 causes problems for __clk_mux_determine_rate */
++	clk = clk_register_fixed_rate(dev, "qsb", NULL, CLK_IS_ROOT, 1);
++	if (IS_ERR(clk))
++		return PTR_ERR(clk);
++
++	if (!id->data) {
++		clk = clk_register_fixed_factor(dev, "acpu_aux",
++						"gpll0_vote", 0, 1, 2);
++		if (IS_ERR(clk))
++			return PTR_ERR(clk);
++	}
++
++	/* Krait configurations have at most 4 CPUs and one L2 */
++	clks = devm_kcalloc(dev, 5, sizeof(*clks), GFP_KERNEL);
++	if (!clks)
++		return -ENOMEM;
++
++	for_each_possible_cpu(cpu) {
++		clk = krait_add_clks(dev, cpu, id->data);
++		if (IS_ERR(clk))
++			return PTR_ERR(clk);
++		clks[cpu] = clk;
++	}
++
++	l2_pri_mux_clk = krait_add_clks(dev, -1, id->data);
++	if (IS_ERR(l2_pri_mux_clk))
++		return PTR_ERR(l2_pri_mux_clk);
++	clks[4] = l2_pri_mux_clk;
++
++	/*
++	 * We don't want the CPU or L2 clocks to be turned off at late init
++	 * if CPUFREQ or HOTPLUG configs are disabled. So, bump up the
++	 * refcount of these clocks. Any cpufreq/hotplug manager can assume
++	 * that the clocks have already been prepared and enabled by the time
++	 * they take over.
++	 */
++	for_each_online_cpu(cpu) {
++		clk_prepare_enable(l2_pri_mux_clk);
++		WARN(clk_prepare_enable(clks[cpu]),
++			"Unable to turn on CPU%d clock", cpu);
++	}
++
++	/*
++	 * Force reinit of HFPLLs and muxes to overwrite any potential
++	 * incorrect configuration of HFPLLs and muxes by the bootloader.
++	 * While at it, also make sure the cores are running at known rates
++	 * and print the current rate.
++	 *
++	 * The clocks are set to aux clock rate first to make sure the
++	 * secondary mux is not sourcing off of QSB. The rate is then set to
++	 * two different rates to force a HFPLL reinit under all
++	 * circumstances.
++	 */
++	cur_rate = clk_get_rate(l2_pri_mux_clk);
++	aux_rate = 384000000;
++	if (cur_rate == 1) {
++		pr_info("L2 @ QSB rate. Forcing new rate.\n");
++		cur_rate = aux_rate;
++	}
++	clk_set_rate(l2_pri_mux_clk, aux_rate);
++	clk_set_rate(l2_pri_mux_clk, 2);
++	clk_set_rate(l2_pri_mux_clk, cur_rate);
++	pr_info("L2 @ %lu KHz\n", clk_get_rate(l2_pri_mux_clk) / 1000);
++	for_each_possible_cpu(cpu) {
++		clk = clks[cpu];
++		cur_rate = clk_get_rate(clk);
++		if (cur_rate == 1) {
++			pr_info("CPU%d @ QSB rate. Forcing new rate.\n", cpu);
++			cur_rate = aux_rate;
++		}
++		clk_set_rate(clk, aux_rate);
++		clk_set_rate(clk, 2);
++		clk_set_rate(clk, cur_rate);
++		pr_info("CPU%d @ %lu KHz\n", cpu, clk_get_rate(clk) / 1000);
++	}
++
++	of_clk_add_provider(dev->of_node, krait_of_get, clks);
++
++	return 0;
++}
++
++static struct platform_driver krait_cc_driver = {
++	.probe = krait_cc_probe,
++	.driver = {
++		.name = "krait-cc",
++		.of_match_table = krait_cc_match_table,
++	},
++};
++module_platform_driver(krait_cc_driver);
++
++MODULE_DESCRIPTION("Krait CPU Clock Driver");
++MODULE_LICENSE("GPL v2");
++MODULE_ALIAS("platform:krait-cc");

target/linux/ipq806x/patches-3.18/143-cpufreq-Add-module-to-register-cpufreq-on-Krait-CPUs.patch

@@ -0,0 +1,304 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v3,12/13] cpufreq: Add module to register cpufreq on Krait CPUs
+From: Stephen Boyd <[email protected]>
+X-Patchwork-Id: 6063191
+Message-Id: <[email protected]>
+To: Mike Turquette <[email protected]>, Stephen Boyd <[email protected]>
+Cc: [email protected], [email protected],
+	[email protected], [email protected],
+	Viresh Kumar <[email protected]>, <[email protected]>
+Date: Fri, 20 Mar 2015 23:45:31 -0700
+
+Register a cpufreq-generic device whenever we detect that a
+"qcom,krait" compatible CPU is present in DT.
+
+Cc: <[email protected]>
+Signed-off-by: Stephen Boyd <[email protected]>
+
+---
+.../devicetree/bindings/arm/msm/qcom,pvs.txt       |  38 ++++
+ drivers/cpufreq/Kconfig.arm                        |   9 +
+ drivers/cpufreq/Makefile                           |   1 +
+ drivers/cpufreq/qcom-cpufreq.c                     | 204 +++++++++++++++++++++
+ 4 files changed, 252 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/arm/msm/qcom,pvs.txt
+ create mode 100644 drivers/cpufreq/qcom-cpufreq.c
+
+--- /dev/null
++++ b/Documentation/devicetree/bindings/arm/msm/qcom,pvs.txt
+@@ -0,0 +1,38 @@
++Qualcomm Process Voltage Scaling Tables
++
++The node name is required to be "qcom,pvs". There shall only be one
++such node present in the root of the tree.
++
++PROPERTIES
++
++- qcom,pvs-format-a or qcom,pvs-format-b:
++	Usage: required
++	Value type: <empty>
++	Definition: Indicates the format of qcom,speedX-pvsY-bin-vZ properties.
++		    If qcom,pvs-format-a is used the table is two columns
++		    (frequency and voltage in that order). If qcom,pvs-format-b 		    is used the table is three columns (frequency, voltage,
++		    and current in that order).
++
++- qcom,speedX-pvsY-bin-vZ:
++	Usage: required
++	Value type: <prop-encoded-array>
++	Definition: The PVS table corresponding to the speed bin X, pvs bin Y,
++		    and version Z.
++Example:
++
++	qcom,pvs {
++		qcom,pvs-format-a;
++		qcom,speed0-pvs0-bin-v0 =
++			<  384000000  950000 >,
++			<  486000000  975000 >,
++			<  594000000 1000000 >,
++			<  702000000 1025000 >,
++			<  810000000 1075000 >,
++			<  918000000 1100000 >,
++			< 1026000000 1125000 >,
++			< 1134000000 1175000 >,
++			< 1242000000 1200000 >,
++			< 1350000000 1225000 >,
++			< 1458000000 1237500 >,
++			< 1512000000 1250000 >;
++	};
+--- a/drivers/cpufreq/Kconfig.arm
++++ b/drivers/cpufreq/Kconfig.arm
+@@ -129,6 +129,15 @@ config ARM_OMAP2PLUS_CPUFREQ
+ 	depends on ARCH_OMAP2PLUS
+ 	default ARCH_OMAP2PLUS
+ 
++config ARM_QCOM_CPUFREQ
++	tristate "Qualcomm based"
++	depends on ARCH_QCOM
++	select PM_OPP
++	help
++	  This adds the CPUFreq driver for Qualcomm SoC based boards.
++
++	  If in doubt, say N.
++
+ config ARM_S3C_CPUFREQ
+ 	bool
+ 	help
+--- a/drivers/cpufreq/Makefile
++++ b/drivers/cpufreq/Makefile
+@@ -64,6 +64,7 @@ obj-$(CONFIG_ARM_OMAP2PLUS_CPUFREQ)	+= o
+ obj-$(CONFIG_PXA25x)			+= pxa2xx-cpufreq.o
+ obj-$(CONFIG_PXA27x)			+= pxa2xx-cpufreq.o
+ obj-$(CONFIG_PXA3xx)			+= pxa3xx-cpufreq.o
++obj-$(CONFIG_ARM_QCOM_CPUFREQ)		+= qcom-cpufreq.o
+ obj-$(CONFIG_ARM_S3C24XX_CPUFREQ)	+= s3c24xx-cpufreq.o
+ obj-$(CONFIG_ARM_S3C24XX_CPUFREQ_DEBUGFS) += s3c24xx-cpufreq-debugfs.o
+ obj-$(CONFIG_ARM_S3C2410_CPUFREQ)	+= s3c2410-cpufreq.o
+--- /dev/null
++++ b/drivers/cpufreq/qcom-cpufreq.c
+@@ -0,0 +1,204 @@
++/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 and
++ * only version 2 as published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ */
++
++#include <linux/cpu.h>
++#include <linux/err.h>
++#include <linux/init.h>
++#include <linux/io.h>
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/of.h>
++#include <linux/platform_device.h>
++#include <linux/pm_opp.h>
++#include <linux/slab.h>
++#include <linux/cpufreq-dt.h>
++
++static void __init get_krait_bin_format_a(int *speed, int *pvs, int *pvs_ver)
++{
++	void __iomem *base;
++	u32 pte_efuse;
++
++	*speed = *pvs = *pvs_ver = 0;
++
++	base = ioremap(0x007000c0, 4);
++	if (!base) {
++		pr_warn("Unable to read efuse data. Defaulting to 0!\n");
++		return;
++	}
++
++	pte_efuse = readl_relaxed(base);
++	iounmap(base);
++
++	*speed = pte_efuse & 0xf;
++	if (*speed == 0xf)
++		*speed = (pte_efuse >> 4) & 0xf;
++
++	if (*speed == 0xf) {
++		*speed = 0;
++		pr_warn("Speed bin: Defaulting to %d\n", *speed);
++	} else {
++		pr_info("Speed bin: %d\n", *speed);
++	}
++
++	*pvs = (pte_efuse >> 10) & 0x7;
++	if (*pvs == 0x7)
++		*pvs = (pte_efuse >> 13) & 0x7;
++
++	if (*pvs == 0x7) {
++		*pvs = 0;
++		pr_warn("PVS bin: Defaulting to %d\n", *pvs);
++	} else {
++		pr_info("PVS bin: %d\n", *pvs);
++	}
++}
++
++static void __init get_krait_bin_format_b(int *speed, int *pvs, int *pvs_ver)
++{
++	u32 pte_efuse, redundant_sel;
++	void __iomem *base;
++
++	*speed = 0;
++	*pvs = 0;
++	*pvs_ver = 0;
++
++	base = ioremap(0xfc4b80b0, 8);
++	if (!base) {
++		pr_warn("Unable to read efuse data. Defaulting to 0!\n");
++		return;
++	}
++
++	pte_efuse = readl_relaxed(base);
++	redundant_sel = (pte_efuse >> 24) & 0x7;
++	*speed = pte_efuse & 0x7;
++	/* 4 bits of PVS are in efuse register bits 31, 8-6. */
++	*pvs = ((pte_efuse >> 28) & 0x8) | ((pte_efuse >> 6) & 0x7);
++	*pvs_ver = (pte_efuse >> 4) & 0x3;
++
++	switch (redundant_sel) {
++	case 1:
++		*speed = (pte_efuse >> 27) & 0xf;
++		break;
++	case 2:
++		*pvs = (pte_efuse >> 27) & 0xf;
++		break;
++	}
++
++	/* Check SPEED_BIN_BLOW_STATUS */
++	if (pte_efuse & BIT(3)) {
++		pr_info("Speed bin: %d\n", *speed);
++	} else {
++		pr_warn("Speed bin not set. Defaulting to 0!\n");
++		*speed = 0;
++	}
++
++	/* Check PVS_BLOW_STATUS */
++	pte_efuse = readl_relaxed(base + 0x4) & BIT(21);
++	if (pte_efuse) {
++		pr_info("PVS bin: %d\n", *pvs);
++	} else {
++		pr_warn("PVS bin not set. Defaulting to 0!\n");
++		*pvs = 0;
++	}
++
++	pr_info("PVS version: %d\n", *pvs_ver);
++	iounmap(base);
++}
++
++static int __init qcom_cpufreq_populate_opps(void)
++{
++	int len, rows, cols, i, k, speed, pvs, pvs_ver;
++	char table_name[] = "qcom,speedXX-pvsXX-bin-vXX";
++	struct device_node *np;
++	struct device *dev;
++	int cpu = 0;
++
++	np = of_find_node_by_name(NULL, "qcom,pvs");
++	if (!np)
++		return -ENODEV;
++
++	if (of_property_read_bool(np, "qcom,pvs-format-a")) {
++		get_krait_bin_format_a(&speed, &pvs, &pvs_ver);
++		cols = 2;
++	} else if (of_property_read_bool(np, "qcom,pvs-format-b")) {
++		get_krait_bin_format_b(&speed, &pvs, &pvs_ver);
++		cols = 3;
++	} else {
++		return -ENODEV;
++	}
++
++	snprintf(table_name, sizeof(table_name),
++			"qcom,speed%d-pvs%d-bin-v%d", speed, pvs, pvs_ver);
++
++	if (!of_find_property(np, table_name, &len))
++		return -EINVAL;
++
++	len /= sizeof(u32);
++	if (len % cols || len == 0)
++		return -EINVAL;
++
++	rows = len / cols;
++
++	for (i = 0, k = 0; i < rows; i++) {
++		u32 freq, volt;
++
++		of_property_read_u32_index(np, table_name, k++, &freq);
++		of_property_read_u32_index(np, table_name, k++, &volt);
++		while (k % cols)
++			k++; /* Skip uA entries if present */
++		for (cpu = 0; cpu < num_possible_cpus(); cpu++) {
++			dev = get_cpu_device(cpu);
++			if (!dev)
++				return -ENODEV;
++			if (dev_pm_opp_add(dev, freq, volt))
++				pr_warn("failed to add OPP %u\n", freq);
++		}
++	}
++
++	return 0;
++}
++
++static int __init qcom_cpufreq_driver_init(void)
++{
++	struct cpufreq_dt_platform_data pdata = { .independent_clocks = true };
++	struct platform_device_info devinfo = {
++		.name = "cpufreq-dt",
++		.data = &pdata,
++		.size_data = sizeof(pdata),
++	};
++	struct device *cpu_dev;
++	struct device_node *np;
++	int ret;
++
++	cpu_dev = get_cpu_device(0);
++	if (!cpu_dev)
++		return -ENODEV;
++
++	np = of_node_get(cpu_dev->of_node);
++	if (!np)
++		return -ENOENT;
++
++	if (!of_device_is_compatible(np, "qcom,krait")) {
++		of_node_put(np);
++		return -ENODEV;
++	}
++	of_node_put(np);
++
++	ret = qcom_cpufreq_populate_opps();
++	if (ret)
++		return ret;
++
++	return PTR_ERR_OR_ZERO(platform_device_register_full(&devinfo));
++}
++module_init(qcom_cpufreq_driver_init);
++
++MODULE_DESCRIPTION("Qualcomm CPUfreq driver");
++MODULE_LICENSE("GPL v2");

target/linux/ipq806x/patches-3.18/144-ARM-dts-qcom-Add-necessary-DT-data-for-Krait-cpufreq.patch

@@ -0,0 +1,100 @@
+--- a/arch/arm/boot/dts/qcom-ipq8064.dtsi
++++ b/arch/arm/boot/dts/qcom-ipq8064.dtsi
+@@ -23,6 +23,11 @@
+ 			next-level-cache = <&L2>;
+ 			qcom,acc = <&acc0>;
+ 			qcom,saw = <&saw0>;
++			clocks = <&kraitcc 0>;
++			clock-names = "cpu";
++			clock-latency = <100000>;
++			core-supply = <&smb208_s2a>;
++			voltage-tolerance = <5>;
+ 		};
+ 
+ 		cpu@1 {
+@@ -33,11 +38,24 @@
+ 			next-level-cache = <&L2>;
+ 			qcom,acc = <&acc1>;
+ 			qcom,saw = <&saw1>;
++			clocks = <&kraitcc 1>;
++			clock-names = "cpu";
++			clock-latency = <100000>;
++			core-supply = <&smb208_s2b>;
+ 		};
+ 
+ 		L2: l2-cache {
+ 			compatible = "cache";
+ 			cache-level = <2>;
++			clocks = <&kraitcc 4>;
++			clock-names = "cache";
++			cache-points-kHz = <
++				/* kHz    uV    CPU kHz */
++				1200000 1150000 1200000
++				1000000 1100000  600000
++				 384000 1100000  384000
++			>;
++			vdd_dig-supply = <&smb208_s1a>;
+ 		};
+ 	};
+ 
+@@ -70,6 +88,46 @@
+ 		};
+ 	};
+ 
++	kraitcc: clock-controller {
++		compatible = "qcom,krait-cc-v1";
++		#clock-cells = <1>;
++	};
++
++	qcom,pvs {
++		qcom,pvs-format-a;
++		qcom,speed0-pvs0-bin-v0 =
++			< 1400000000 1250000 >,
++			< 1200000000 1200000 >,
++			< 1000000000 1150000 >,
++			 < 800000000 1100000 >,
++			 < 600000000 1050000 >,
++			 < 384000000 1000000 >;
++
++		qcom,speed0-pvs1-bin-v0 =
++			< 1400000000 1175000 >,
++			< 1200000000 1125000 >,
++			< 1000000000 1075000 >,
++			 < 800000000 1025000 >,
++			 < 600000000  975000 >,
++			 < 384000000  925000 >;
++
++		qcom,speed0-pvs2-bin-v0 =
++			< 1400000000 1125000 >,
++			< 1200000000 1075000 >,
++			< 1000000000 1025000 >,
++			 < 800000000  995000 >,
++			 < 600000000  925000 >,
++			 < 384000000  875000 >;
++
++		qcom,speed0-pvs3-bin-v0 =
++			< 1400000000 1050000 >,
++			< 1200000000 1000000 >,
++			< 1000000000  950000 >,
++			 < 800000000  900000 >,
++			 < 600000000  850000 >,
++			 < 384000000  800000 >;
++	};
++
+ 	soc: soc {
+ 		#address-cells = <1>;
+ 		#size-cells = <1>;
+@@ -170,11 +228,13 @@
+ 		acc0: clock-controller@2088000 {
+ 			compatible = "qcom,kpss-acc-v1";
+ 			reg = <0x02088000 0x1000>, <0x02008000 0x1000>;
++			clock-output-names = "acpu0_aux";
+ 		};
+ 
+ 		acc1: clock-controller@2098000 {
+ 			compatible = "qcom,kpss-acc-v1";
+ 			reg = <0x02098000 0x1000>, <0x02008000 0x1000>;
++			clock-output-names = "acpu1_aux";
+ 		};
+ 
+ 		l2cc: clock-controller@2011000 {

target/linux/ipq806x/patches-3.18/145-cpufreq-Add-a-cpufreq-krait-based-on-cpufre.patch

@@ -0,0 +1,461 @@
+From dd77db4143290689d3a5e1ec61627233d0711b66 Mon Sep 17 00:00:00 2001
+From: Stephen Boyd <[email protected]>
+Date: Fri, 30 May 2014 16:36:11 -0700
+Subject: [PATCH] FROMLIST: cpufreq: Add a cpufreq-krait based on cpufreq-cpu0
+
+Krait processors have individual clocks for each CPU that can
+scale independently from one another. cpufreq-cpu0 is fairly
+close to this, but assumes that there is only one clock for all
+CPUs. Add a driver to support the Krait configuration.
+
+TODO: Merge into cpufreq-cpu0? Or make generic?
+
+Signed-off-by: Stephen Boyd <[email protected]>
+
+---
+ drivers/cpufreq/Kconfig         |  13 +++
+ drivers/cpufreq/Makefile        |   1 +
+ drivers/cpufreq/cpufreq-krait.c | 190 ++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 204 insertions(+)
+ create mode 100644 drivers/cpufreq/cpufreq-krait.c
+
+--- a/drivers/cpufreq/Kconfig
++++ b/drivers/cpufreq/Kconfig
+@@ -196,6 +196,19 @@ config CPUFREQ_DT
+ 
+ 	  If in doubt, say N.
+ 
++config GENERIC_CPUFREQ_KRAIT
++	tristate "Krait cpufreq driver"
++	depends on HAVE_CLK && OF
++	# if CPU_THERMAL is on and THERMAL=m, CPU0 cannot be =y:
++	depends on !CPU_THERMAL || THERMAL
++	select PM_OPP
++	help
++	  This adds a generic cpufreq driver for CPU0 frequency management.
++	  It supports both uniprocessor (UP) and symmetric multiprocessor (SMP)
++	  systems which share clock and voltage across all CPUs.
++
++	  If in doubt, say N.
++
+ menu "x86 CPU frequency scaling drivers"
+ depends on X86
+ source "drivers/cpufreq/Kconfig.x86"
+--- a/drivers/cpufreq/Makefile
++++ b/drivers/cpufreq/Makefile
+@@ -14,6 +14,7 @@ obj-$(CONFIG_CPU_FREQ_GOV_CONSERVATIVE)
+ obj-$(CONFIG_CPU_FREQ_GOV_COMMON)		+= cpufreq_governor.o
+ 
+ obj-$(CONFIG_CPUFREQ_DT)		+= cpufreq-dt.o
++obj-$(CONFIG_GENERIC_CPUFREQ_KRAIT)	+= cpufreq-krait.o
+ 
+ ##################################################################################
+ # x86 drivers.
+--- /dev/null
++++ b/drivers/cpufreq/cpufreq-krait.c
+@@ -0,0 +1,390 @@
++/*
++ * Copyright (C) 2012 Freescale Semiconductor, Inc.
++ * Copyright (c) 2014, The Linux Foundation. All rights reserved.
++ *
++ * The OPP code in function krait_set_target() is reused from
++ * drivers/cpufreq/omap-cpufreq.c
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++#include <linux/clk.h>
++#include <linux/cpu.h>
++#include <linux/cpu_cooling.h>
++#include <linux/cpufreq.h>
++#include <linux/cpumask.h>
++#include <linux/err.h>
++#include <linux/module.h>
++#include <linux/of.h>
++#include <linux/pm_opp.h>
++#include <linux/platform_device.h>
++#include <linux/regulator/consumer.h>
++#include <linux/slab.h>
++#include <linux/thermal.h>
++
++static unsigned int transition_latency;
++static unsigned int voltage_tolerance; /* in percentage */
++
++static struct device *cpu_dev;
++static DEFINE_PER_CPU(struct clk *, krait_cpu_clks);
++static DEFINE_PER_CPU(struct regulator *, krait_supply_core);
++static struct cpufreq_frequency_table *freq_table;
++static struct thermal_cooling_device *cdev;
++
++struct cache_points {
++	unsigned long cache_freq;
++	unsigned int cache_volt;
++	unsigned long cpu_freq;
++};
++
++static struct regulator *krait_l2_reg;
++static struct clk *krait_l2_clk;
++static struct cache_points *krait_l2_points;
++static int nr_krait_l2_points;
++
++static int krait_parse_cache_points(struct device *dev,
++		struct device_node *of_node)
++{
++	const struct property *prop;
++	const __be32 *val;
++	int nr, i;
++
++	prop = of_find_property(of_node, "cache-points-kHz", NULL);
++	if (!prop)
++		return -ENODEV;
++	if (!prop->value)
++		return -ENODATA;
++
++	/*
++	 * Each OPP is a set of tuples consisting of frequency and
++	 * cpu-frequency like <freq-kHz volt-uV freq-kHz>.
++	 */
++	nr = prop->length / sizeof(u32);
++	if (nr % 3) {
++		dev_err(dev, "%s: Invalid cache points\n", __func__);
++		return -EINVAL;
++	}
++	nr /= 3;
++
++	krait_l2_points = devm_kcalloc(dev, nr, sizeof(*krait_l2_points),
++				       GFP_KERNEL);
++	if (!krait_l2_points)
++		return -ENOMEM;
++	nr_krait_l2_points = nr;
++
++	for (i = 0, val = prop->value; i < nr; i++) {
++		unsigned long cache_freq = be32_to_cpup(val++) * 1000;
++		unsigned int cache_volt = be32_to_cpup(val++);
++		unsigned long cpu_freq = be32_to_cpup(val++) * 1000;
++
++		krait_l2_points[i].cache_freq = cache_freq;
++		krait_l2_points[i].cache_volt = cache_volt;
++		krait_l2_points[i].cpu_freq = cpu_freq;
++	}
++
++	return 0;
++}
++
++static int krait_set_target(struct cpufreq_policy *policy, unsigned int index)
++{
++	struct dev_pm_opp *opp;
++	unsigned long volt = 0, volt_old = 0, tol = 0;
++	unsigned long freq, max_cpu_freq = 0;
++	unsigned int old_freq, new_freq;
++	long freq_Hz, freq_exact;
++	int ret, i;
++	struct clk *cpu_clk;
++	struct regulator *core;
++	unsigned int cpu;
++
++	cpu_clk = per_cpu(krait_cpu_clks, policy->cpu);
++
++	freq_Hz = clk_round_rate(cpu_clk, freq_table[index].frequency * 1000);
++	if (freq_Hz <= 0)
++		freq_Hz = freq_table[index].frequency * 1000;
++
++	freq_exact = freq_Hz;
++	new_freq = freq_Hz / 1000;
++	old_freq = clk_get_rate(cpu_clk) / 1000;
++
++	core = per_cpu(krait_supply_core, policy->cpu);
++
++	rcu_read_lock();
++	opp = dev_pm_opp_find_freq_ceil(cpu_dev, &freq_Hz);
++	if (IS_ERR(opp)) {
++		rcu_read_unlock();
++		pr_err("failed to find OPP for %ld\n", freq_Hz);
++		return PTR_ERR(opp);
++	}
++	volt = dev_pm_opp_get_voltage(opp);
++	rcu_read_unlock();
++	tol = volt * voltage_tolerance / 100;
++	volt_old = regulator_get_voltage(core);
++
++	pr_debug("%u MHz, %ld mV --> %u MHz, %ld mV\n",
++		 old_freq / 1000, volt_old ? volt_old / 1000 : -1,
++		 new_freq / 1000, volt ? volt / 1000 : -1);
++
++	/* scaling up?  scale voltage before frequency */
++	if (new_freq > old_freq) {
++		ret = regulator_set_voltage_tol(core, volt, tol);
++		if (ret) {
++			pr_err("failed to scale voltage up: %d\n", ret);
++			return ret;
++		}
++	}
++
++	ret = clk_set_rate(cpu_clk, freq_exact);
++	if (ret) {
++		pr_err("failed to set clock rate: %d\n", ret);
++		return ret;
++	}
++
++	/* scaling down?  scale voltage after frequency */
++	if (new_freq < old_freq) {
++		ret = regulator_set_voltage_tol(core, volt, tol);
++		if (ret) {
++			pr_err("failed to scale voltage down: %d\n", ret);
++			clk_set_rate(cpu_clk, old_freq * 1000);
++		}
++	}
++
++	for_each_possible_cpu(cpu) {
++		freq = clk_get_rate(per_cpu(krait_cpu_clks, cpu));
++		max_cpu_freq = max(max_cpu_freq, freq);
++	}
++
++	for (i = 0; i < nr_krait_l2_points; i++) {
++		if (max_cpu_freq >= krait_l2_points[i].cpu_freq) {
++			if (krait_l2_reg) {
++				ret = regulator_set_voltage_tol(krait_l2_reg,
++						krait_l2_points[i].cache_volt,
++						tol);
++				if (ret) {
++					pr_err("failed to scale l2 voltage: %d\n",
++						ret);
++				}
++			}
++			ret = clk_set_rate(krait_l2_clk,
++					krait_l2_points[i].cache_freq);
++			if (ret)
++				pr_err("failed to scale l2 clk: %d\n", ret);
++			break;
++		}
++
++	}
++
++	return ret;
++}
++
++static int krait_cpufreq_init(struct cpufreq_policy *policy)
++{
++	int ret;
++
++	policy->clk = per_cpu(krait_cpu_clks, policy->cpu);
++
++	ret = cpufreq_table_validate_and_show(policy, freq_table);
++	if (ret) {
++		pr_err("%s: invalid frequency table: %d\n", __func__, ret);
++		return ret;
++	}
++
++	policy->cpuinfo.transition_latency = transition_latency;
++
++	return 0;
++}
++
++static struct cpufreq_driver krait_cpufreq_driver = {
++	.flags = CPUFREQ_STICKY,
++	.verify = cpufreq_generic_frequency_table_verify,
++	.target_index = krait_set_target,
++	.get = cpufreq_generic_get,
++	.init = krait_cpufreq_init,
++	.name = "generic_krait",
++	.attr = cpufreq_generic_attr,
++};
++
++static int krait_cpufreq_probe(struct platform_device *pdev)
++{
++	struct device_node *np, *cache;
++	int ret, i;
++	unsigned int cpu;
++	struct device *dev;
++	struct clk *clk;
++	struct regulator *core;
++	unsigned long freq_Hz, freq, max_cpu_freq;
++	struct dev_pm_opp *opp;
++	unsigned long volt, tol;
++
++	cpu_dev = get_cpu_device(0);
++	if (!cpu_dev) {
++		pr_err("failed to get krait device\n");
++		return -ENODEV;
++	}
++
++	np = of_node_get(cpu_dev->of_node);
++	if (!np) {
++		pr_err("failed to find krait node\n");
++		return -ENOENT;
++	}
++
++	ret = dev_pm_opp_init_cpufreq_table(cpu_dev, &freq_table);
++	if (ret) {
++		pr_err("failed to init cpufreq table: %d\n", ret);
++		goto out_put_node;
++	}
++
++	of_property_read_u32(np, "voltage-tolerance", &voltage_tolerance);
++
++	if (of_property_read_u32(np, "clock-latency", &transition_latency))
++		transition_latency = CPUFREQ_ETERNAL;
++
++	cache = of_find_next_cache_node(np);
++	if (cache) {
++		struct device_node *vdd;
++
++		vdd = of_parse_phandle(cache, "vdd_dig-supply", 0);
++		if (vdd) {
++			krait_l2_reg = regulator_get(NULL, vdd->name);
++			if (IS_ERR(krait_l2_reg)) {
++				pr_warn("failed to get l2 vdd_dig supply\n");
++				krait_l2_reg = NULL;
++			}
++			of_node_put(vdd);
++		}
++
++		krait_l2_clk = of_clk_get(cache, 0);
++		if (!IS_ERR(krait_l2_clk)) {
++			ret = krait_parse_cache_points(&pdev->dev, cache);
++			if (ret)
++				clk_put(krait_l2_clk);
++		}
++		if (IS_ERR(krait_l2_clk) || ret)
++			krait_l2_clk = NULL;
++	}
++
++	for_each_possible_cpu(cpu) {
++		dev = get_cpu_device(cpu);
++		if (!dev) {
++			pr_err("failed to get krait device\n");
++			ret = -ENOENT;
++			goto out_free_table;
++		}
++		per_cpu(krait_cpu_clks, cpu) = clk = devm_clk_get(dev, NULL);
++		if (IS_ERR(clk)) {
++			ret = PTR_ERR(clk);
++			goto out_free_table;
++		}
++		core = devm_regulator_get(dev, "core");
++		if (IS_ERR(core)) {
++			pr_debug("failed to get core regulator\n");
++			ret = PTR_ERR(core);
++			goto out_free_table;
++		}
++		per_cpu(krait_supply_core, cpu) = core;
++
++		freq_Hz = clk_get_rate(clk);
++
++		rcu_read_lock();
++		opp = dev_pm_opp_find_freq_ceil(cpu_dev, &freq_Hz);
++		if (IS_ERR(opp)) {
++			rcu_read_unlock();
++			pr_err("failed to find OPP for %ld\n", freq_Hz);
++			ret = PTR_ERR(opp);
++			goto out_free_table;
++		}
++		volt = dev_pm_opp_get_voltage(opp);
++		rcu_read_unlock();
++
++		tol = volt * voltage_tolerance / 100;
++		ret = regulator_set_voltage_tol(core, volt, tol);
++		if (ret) {
++			pr_err("failed to scale voltage up: %d\n", ret);
++			goto out_free_table;
++		}
++		ret = regulator_enable(core);
++		if (ret) {
++			pr_err("failed to enable regulator: %d\n", ret);
++			goto out_free_table;
++		}
++		max_cpu_freq = max(max_cpu_freq, freq);
++	}
++
++	for (i = 0; i < nr_krait_l2_points; i++) {
++		if (max_cpu_freq >= krait_l2_points[i].cpu_freq) {
++			if (krait_l2_reg) {
++				ret = regulator_set_voltage_tol(krait_l2_reg,
++						krait_l2_points[i].cache_volt,
++						tol);
++				if (ret)
++					pr_err("failed to scale l2 voltage: %d\n",
++							ret);
++				ret = regulator_enable(krait_l2_reg);
++				if (ret)
++					pr_err("failed to enable l2 voltage: %d\n",
++							ret);
++			}
++			break;
++		}
++
++	}
++
++	ret = cpufreq_register_driver(&krait_cpufreq_driver);
++	if (ret) {
++		pr_err("failed register driver: %d\n", ret);
++		goto out_free_table;
++	}
++	of_node_put(np);
++
++	/*
++	 * For now, just loading the cooling device;
++	 * thermal DT code takes care of matching them.
++	 */
++	for_each_possible_cpu(cpu) {
++		dev = get_cpu_device(cpu);
++		np = of_node_get(dev->of_node);
++		if (of_find_property(np, "#cooling-cells", NULL)) {
++			cdev = of_cpufreq_cooling_register(np, cpumask_of(cpu));
++			if (IS_ERR(cdev))
++				pr_err("running cpufreq without cooling device: %ld\n",
++				       PTR_ERR(cdev));
++		}
++		of_node_put(np);
++	}
++
++	return 0;
++
++out_free_table:
++	regulator_put(krait_l2_reg);
++	clk_put(krait_l2_clk);
++	dev_pm_opp_free_cpufreq_table(cpu_dev, &freq_table);
++out_put_node:
++	of_node_put(np);
++	return ret;
++}
++
++static int krait_cpufreq_remove(struct platform_device *pdev)
++{
++	cpufreq_cooling_unregister(cdev);
++	cpufreq_unregister_driver(&krait_cpufreq_driver);
++	dev_pm_opp_free_cpufreq_table(cpu_dev, &freq_table);
++	clk_put(krait_l2_clk);
++	regulator_put(krait_l2_reg);
++
++	return 0;
++}
++
++static struct platform_driver krait_cpufreq_platdrv = {
++	.driver = {
++		.name	= "cpufreq-krait",
++		.owner	= THIS_MODULE,
++	},
++	.probe		= krait_cpufreq_probe,
++	.remove		= krait_cpufreq_remove,
++};
++module_platform_driver(krait_cpufreq_platdrv);
++
++MODULE_DESCRIPTION("Krait CPUfreq driver");
++MODULE_LICENSE("GPL v2");
+--- a/drivers/cpufreq/qcom-cpufreq.c
++++ b/drivers/cpufreq/qcom-cpufreq.c
+@@ -168,11 +168,8 @@ static int __init qcom_cpufreq_populate_
+ 
+ static int __init qcom_cpufreq_driver_init(void)
+ {
+-	struct cpufreq_dt_platform_data pdata = { .independent_clocks = true };
+ 	struct platform_device_info devinfo = {
+-		.name = "cpufreq-dt",
+-		.data = &pdata,
+-		.size_data = sizeof(pdata),
++		.name = "cpufreq-krait",
+ 	};
+ 	struct device *cpu_dev;
+ 	struct device_node *np;

target/linux/ipq806x/patches-3.18/700-add-gmac-dts-suport.patch

@@ -127,7 +127,7 @@
  
  / {
  	model = "Qualcomm IPQ8064";
-@@ -577,5 +578,42 @@
+@@ -637,5 +638,42 @@
  				dr_mode = "host";
  			};
  		};

target/linux/ipq806x/patches-4.0/133-ARM-Add-Krait-L2-register-accessor-functions.patch

@@ -0,0 +1,144 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v3,01/13] ARM: Add Krait L2 register accessor functions
+From: Stephen Boyd <[email protected]>
+X-Patchwork-Id: 6063051
+Message-Id: <[email protected]>
+To: Mike Turquette <[email protected]>, Stephen Boyd <[email protected]>
+Cc: [email protected], [email protected],
+	[email protected], [email protected],
+	Viresh Kumar <[email protected]>,
+	Mark Rutland <[email protected]>, Russell King <[email protected]>,
+	Courtney Cavin <[email protected]>
+Date: Fri, 20 Mar 2015 23:45:20 -0700
+
+Krait CPUs have a handful of L2 cache controller registers that
+live behind a cp15 based indirection register. First you program
+the indirection register (l2cpselr) to point the L2 'window'
+register (l2cpdr) at what you want to read/write.  Then you
+read/write the 'window' register to do what you want. The
+l2cpselr register is not banked per-cpu so we must lock around
+accesses to it to prevent other CPUs from re-pointing l2cpdr
+underneath us.
+
+Cc: Mark Rutland <[email protected]>
+Cc: Russell King <[email protected]>
+Cc: Courtney Cavin <[email protected]>
+Signed-off-by: Stephen Boyd <[email protected]>
+
+---
+arch/arm/common/Kconfig                   |  3 ++
+ arch/arm/common/Makefile                  |  1 +
+ arch/arm/common/krait-l2-accessors.c      | 58 +++++++++++++++++++++++++++++++
+ arch/arm/include/asm/krait-l2-accessors.h | 20 +++++++++++
+ 4 files changed, 82 insertions(+)
+ create mode 100644 arch/arm/common/krait-l2-accessors.c
+ create mode 100644 arch/arm/include/asm/krait-l2-accessors.h
+
+--- a/arch/arm/common/Kconfig
++++ b/arch/arm/common/Kconfig
+@@ -9,6 +9,9 @@ config DMABOUNCE
+ 	bool
+ 	select ZONE_DMA
+ 
++config KRAIT_L2_ACCESSORS
++	bool
++
+ config SHARP_LOCOMO
+ 	bool
+ 
+--- a/arch/arm/common/Makefile
++++ b/arch/arm/common/Makefile
+@@ -7,6 +7,7 @@ obj-y				+= firmware.o
+ obj-$(CONFIG_ICST)		+= icst.o
+ obj-$(CONFIG_SA1111)		+= sa1111.o
+ obj-$(CONFIG_DMABOUNCE)		+= dmabounce.o
++obj-$(CONFIG_KRAIT_L2_ACCESSORS) += krait-l2-accessors.o
+ obj-$(CONFIG_SHARP_LOCOMO)	+= locomo.o
+ obj-$(CONFIG_SHARP_PARAM)	+= sharpsl_param.o
+ obj-$(CONFIG_SHARP_SCOOP)	+= scoop.o
+--- /dev/null
++++ b/arch/arm/common/krait-l2-accessors.c
+@@ -0,0 +1,58 @@
++/*
++ * Copyright (c) 2011-2013, The Linux Foundation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 and
++ * only version 2 as published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ */
++
++#include <linux/spinlock.h>
++#include <linux/export.h>
++
++#include <asm/barrier.h>
++#include <asm/krait-l2-accessors.h>
++
++static DEFINE_RAW_SPINLOCK(krait_l2_lock);
++
++void krait_set_l2_indirect_reg(u32 addr, u32 val)
++{
++	unsigned long flags;
++
++	raw_spin_lock_irqsave(&krait_l2_lock, flags);
++	/*
++	 * Select the L2 window by poking l2cpselr, then write to the window
++	 * via l2cpdr.
++	 */
++	asm volatile ("mcr p15, 3, %0, c15, c0, 6 @ l2cpselr" : : "r" (addr));
++	isb();
++	asm volatile ("mcr p15, 3, %0, c15, c0, 7 @ l2cpdr" : : "r" (val));
++	isb();
++
++	raw_spin_unlock_irqrestore(&krait_l2_lock, flags);
++}
++EXPORT_SYMBOL(krait_set_l2_indirect_reg);
++
++u32 krait_get_l2_indirect_reg(u32 addr)
++{
++	u32 val;
++	unsigned long flags;
++
++	raw_spin_lock_irqsave(&krait_l2_lock, flags);
++	/*
++	 * Select the L2 window by poking l2cpselr, then read from the window
++	 * via l2cpdr.
++	 */
++	asm volatile ("mcr p15, 3, %0, c15, c0, 6 @ l2cpselr" : : "r" (addr));
++	isb();
++	asm volatile ("mrc p15, 3, %0, c15, c0, 7 @ l2cpdr" : "=r" (val));
++
++	raw_spin_unlock_irqrestore(&krait_l2_lock, flags);
++
++	return val;
++}
++EXPORT_SYMBOL(krait_get_l2_indirect_reg);
+--- /dev/null
++++ b/arch/arm/include/asm/krait-l2-accessors.h
+@@ -0,0 +1,20 @@
++/*
++ * Copyright (c) 2011-2013, The Linux Foundation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 and
++ * only version 2 as published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ */
++
++#ifndef __ASMARM_KRAIT_L2_ACCESSORS_H
++#define __ASMARM_KRAIT_L2_ACCESSORS_H
++
++extern void krait_set_l2_indirect_reg(u32 addr, u32 val);
++extern u32 krait_get_l2_indirect_reg(u32 addr);
++
++#endif

target/linux/ipq806x/patches-4.0/134-clk-mux-Split-out-register-accessors-for-reuse.patch

@@ -0,0 +1,192 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v3,02/13] clk: mux: Split out register accessors for reuse
+From: Stephen Boyd <[email protected]>
+X-Patchwork-Id: 6063111
+Message-Id: <[email protected]>
+To: Mike Turquette <[email protected]>, Stephen Boyd <[email protected]>
+Cc: [email protected], [email protected],
+	[email protected], [email protected],
+	Viresh Kumar <[email protected]>
+Date: Fri, 20 Mar 2015 23:45:21 -0700
+
+We want to reuse the logic in clk-mux.c for other clock drivers
+that don't use readl as register accessors. Fortunately, there
+really isn't much to the mux code besides the table indirection
+and quirk flags if you assume any bit shifting and masking has
+been done already. Pull that logic out into reusable functions
+that operate on an optional table and some flags so that other
+drivers can use the same logic.
+
+Signed-off-by: Stephen Boyd <[email protected]>
+
+---
+drivers/clk/clk-mux.c        | 76 +++++++++++++++++++++++++++-----------------
+ include/linux/clk-provider.h |  9 ++++--
+ 2 files changed, 54 insertions(+), 31 deletions(-)
+
+--- a/drivers/clk/clk-mux.c
++++ b/drivers/clk/clk-mux.c
+@@ -29,35 +29,24 @@
+ 
+ #define to_clk_mux(_hw) container_of(_hw, struct clk_mux, hw)
+ 
+-static u8 clk_mux_get_parent(struct clk_hw *hw)
++unsigned int clk_mux_get_parent(struct clk_hw *hw, unsigned int val,
++				unsigned int *table, unsigned long flags)
+ {
+-	struct clk_mux *mux = to_clk_mux(hw);
+ 	int num_parents = __clk_get_num_parents(hw->clk);
+-	u32 val;
+ 
+-	/*
+-	 * FIXME need a mux-specific flag to determine if val is bitwise or numeric
+-	 * e.g. sys_clkin_ck's clksel field is 3 bits wide, but ranges from 0x1
+-	 * to 0x7 (index starts at one)
+-	 * OTOH, pmd_trace_clk_mux_ck uses a separate bit for each clock, so
+-	 * val = 0x4 really means "bit 2, index starts at bit 0"
+-	 */
+-	val = clk_readl(mux->reg) >> mux->shift;
+-	val &= mux->mask;
+-
+-	if (mux->table) {
++	if (table) {
+ 		int i;
+ 
+ 		for (i = 0; i < num_parents; i++)
+-			if (mux->table[i] == val)
++			if (table[i] == val)
+ 				return i;
+ 		return -EINVAL;
+ 	}
+ 
+-	if (val && (mux->flags & CLK_MUX_INDEX_BIT))
++	if (val && (flags & CLK_MUX_INDEX_BIT))
+ 		val = ffs(val) - 1;
+ 
+-	if (val && (mux->flags & CLK_MUX_INDEX_ONE))
++	if (val && (flags & CLK_MUX_INDEX_ONE))
+ 		val--;
+ 
+ 	if (val >= num_parents)
+@@ -65,24 +54,53 @@ static u8 clk_mux_get_parent(struct clk_
+ 
+ 	return val;
+ }
++EXPORT_SYMBOL_GPL(clk_mux_get_parent);
+ 
+-static int clk_mux_set_parent(struct clk_hw *hw, u8 index)
++static u8 _clk_mux_get_parent(struct clk_hw *hw)
+ {
+ 	struct clk_mux *mux = to_clk_mux(hw);
+ 	u32 val;
+-	unsigned long flags = 0;
+ 
+-	if (mux->table)
+-		index = mux->table[index];
++	/*
++	 * FIXME need a mux-specific flag to determine if val is bitwise or numeric
++	 * e.g. sys_clkin_ck's clksel field is 3 bits wide, but ranges from 0x1
++	 * to 0x7 (index starts at one)
++	 * OTOH, pmd_trace_clk_mux_ck uses a separate bit for each clock, so
++	 * val = 0x4 really means "bit 2, index starts at bit 0"
++	 */
++	val = clk_readl(mux->reg) >> mux->shift;
++	val &= mux->mask;
++
++	return clk_mux_get_parent(hw, val, mux->table, mux->flags);
++}
+ 
+-	else {
+-		if (mux->flags & CLK_MUX_INDEX_BIT)
+-			index = 1 << index;
++unsigned int clk_mux_reindex(u8 index, unsigned int *table,
++			     unsigned long flags)
++{
++	unsigned int val = index;
+ 
+-		if (mux->flags & CLK_MUX_INDEX_ONE)
+-			index++;
++	if (table) {
++		val = table[val];
++	} else {
++		if (flags & CLK_MUX_INDEX_BIT)
++			val = 1 << index;
++
++		if (flags & CLK_MUX_INDEX_ONE)
++			val++;
+ 	}
+ 
++	return val;
++}
++EXPORT_SYMBOL_GPL(clk_mux_reindex);
++
++static int clk_mux_set_parent(struct clk_hw *hw, u8 index)
++{
++	struct clk_mux *mux = to_clk_mux(hw);
++	u32 val;
++	unsigned long flags = 0;
++
++	index = clk_mux_reindex(index, mux->table, mux->flags);
++
+ 	if (mux->lock)
+ 		spin_lock_irqsave(mux->lock, flags);
+ 
+@@ -102,21 +120,21 @@ static int clk_mux_set_parent(struct clk
+ }
+ 
+ const struct clk_ops clk_mux_ops = {
+-	.get_parent = clk_mux_get_parent,
++	.get_parent = _clk_mux_get_parent,
+ 	.set_parent = clk_mux_set_parent,
+ 	.determine_rate = __clk_mux_determine_rate,
+ };
+ EXPORT_SYMBOL_GPL(clk_mux_ops);
+ 
+ const struct clk_ops clk_mux_ro_ops = {
+-	.get_parent = clk_mux_get_parent,
++	.get_parent = _clk_mux_get_parent,
+ };
+ EXPORT_SYMBOL_GPL(clk_mux_ro_ops);
+ 
+ struct clk *clk_register_mux_table(struct device *dev, const char *name,
+ 		const char **parent_names, u8 num_parents, unsigned long flags,
+ 		void __iomem *reg, u8 shift, u32 mask,
+-		u8 clk_mux_flags, u32 *table, spinlock_t *lock)
++		u8 clk_mux_flags, unsigned int *table, spinlock_t *lock)
+ {
+ 	struct clk_mux *mux;
+ 	struct clk *clk;
+--- a/include/linux/clk-provider.h
++++ b/include/linux/clk-provider.h
+@@ -409,7 +409,7 @@ void clk_unregister_divider(struct clk *
+ struct clk_mux {
+ 	struct clk_hw	hw;
+ 	void __iomem	*reg;
+-	u32		*table;
++	unsigned int	*table;
+ 	u32		mask;
+ 	u8		shift;
+ 	u8		flags;
+@@ -425,6 +425,11 @@ struct clk_mux {
+ extern const struct clk_ops clk_mux_ops;
+ extern const struct clk_ops clk_mux_ro_ops;
+ 
++unsigned int clk_mux_get_parent(struct clk_hw *hw, unsigned int val,
++				unsigned int *table, unsigned long flags);
++unsigned int clk_mux_reindex(u8 index, unsigned int *table,
++			     unsigned long flags);
++
+ struct clk *clk_register_mux(struct device *dev, const char *name,
+ 		const char **parent_names, u8 num_parents, unsigned long flags,
+ 		void __iomem *reg, u8 shift, u8 width,
+@@ -433,7 +438,7 @@ struct clk *clk_register_mux(struct devi
+ struct clk *clk_register_mux_table(struct device *dev, const char *name,
+ 		const char **parent_names, u8 num_parents, unsigned long flags,
+ 		void __iomem *reg, u8 shift, u32 mask,
+-		u8 clk_mux_flags, u32 *table, spinlock_t *lock);
++		u8 clk_mux_flags, unsigned int *table, spinlock_t *lock);
+ 
+ void clk_unregister_mux(struct clk *clk);
+ 

target/linux/ipq806x/patches-4.0/135-clk-Avoid-sending-high-rates-to-downstream-clocks-during-set_rate.patch

@@ -0,0 +1,130 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v3, 03/13] clk: Avoid sending high rates to downstream clocks during
+	set_rate
+From: Stephen Boyd <[email protected]>
+X-Patchwork-Id: 6063271
+Message-Id: <[email protected]>
+To: Mike Turquette <[email protected]>, Stephen Boyd <[email protected]>
+Cc: [email protected], [email protected],
+	[email protected], [email protected],
+	Viresh Kumar <[email protected]>
+Date: Fri, 20 Mar 2015 23:45:22 -0700
+
+If a clock is on and we call clk_set_rate() on it we may get into
+a situation where the clock temporarily increases in rate
+dramatically while we walk the tree and call .set_rate() ops. For
+example, consider a case where a PLL feeds into a divider.
+Initially the divider is set to divide by 1 and the PLL is
+running fairly slow (100MHz). The downstream consumer of the
+divider output can only handle rates =< 400 MHz, but the divider
+can only choose between divisors of 1 and 4.
+
+ +-----+   +----------------+
+ | PLL |-->| div 1 or div 4 |---> consumer device
+ +-----+   +----------------+
+
+To achieve a rate of 400MHz on the output of the divider, we
+would have to set the rate of the PLL to 1.6 GHz and then divide
+it by 4. The current code would set the PLL to 1.6GHz first while
+the divider is still set to 1, thus causing the downstream
+consumer of the clock to receive a few clock cycles of 1.6GHz
+clock (far beyond it's maximum acceptable rate). We should be
+changing the divider first before increasing the PLL rate to
+avoid this problem.
+
+Therefore, set the rate of any child clocks that are increasing
+in rate from their current rate so that they can increase their
+dividers if necessary. We assume that there isn't such a thing as
+minimum rate requirements.
+
+Signed-off-by: Stephen Boyd <[email protected]>
+
+---
+drivers/clk/clk.c | 34 ++++++++++++++++++++++------------
+ 1 file changed, 22 insertions(+), 12 deletions(-)
+
+--- a/drivers/clk/clk.c
++++ b/drivers/clk/clk.c
+@@ -1688,21 +1688,24 @@ static struct clk_core *clk_propagate_ra
+  * walk down a subtree and set the new rates notifying the rate
+  * change on the way
+  */
+-static void clk_change_rate(struct clk_core *clk)
++static void
++clk_change_rate(struct clk_core *clk, unsigned long best_parent_rate)
+ {
+ 	struct clk_core *child;
+ 	struct hlist_node *tmp;
+ 	unsigned long old_rate;
+-	unsigned long best_parent_rate = 0;
+ 	bool skip_set_rate = false;
+ 	struct clk_core *old_parent;
+ 
+-	old_rate = clk->rate;
++	hlist_for_each_entry(child, &clk->children, child_node) {
++		/* Skip children who will be reparented to another clock */
++		if (child->new_parent && child->new_parent != clk)
++			continue;
++		if (child->new_rate > child->rate)
++			clk_change_rate(child, clk->new_rate);
++	}
+ 
+-	if (clk->new_parent)
+-		best_parent_rate = clk->new_parent->rate;
+-	else if (clk->parent)
+-		best_parent_rate = clk->parent->rate;
++	old_rate = clk->rate;
+ 
+ 	if (clk->new_parent && clk->new_parent != clk->parent) {
+ 		old_parent = __clk_set_parent_before(clk, clk->new_parent);
+@@ -1722,7 +1725,7 @@ static void clk_change_rate(struct clk_c
+ 	if (!skip_set_rate && clk->ops->set_rate)
+ 		clk->ops->set_rate(clk->hw, clk->new_rate, best_parent_rate);
+ 
+-	clk->rate = clk_recalc(clk, best_parent_rate);
++	clk->rate = clk->new_rate;
+ 
+ 	if (clk->notifier_count && old_rate != clk->rate)
+ 		__clk_notify(clk, POST_RATE_CHANGE, old_rate, clk->rate);
+@@ -1735,12 +1738,13 @@ static void clk_change_rate(struct clk_c
+ 		/* Skip children who will be reparented to another clock */
+ 		if (child->new_parent && child->new_parent != clk)
+ 			continue;
+-		clk_change_rate(child);
++		if (child->new_rate != child->rate)
++			clk_change_rate(child, clk->new_rate);
+ 	}
+ 
+ 	/* handle the new child who might not be in clk->children yet */
+-	if (clk->new_child)
+-		clk_change_rate(clk->new_child);
++	if (clk->new_child && clk->new_child->new_rate != clk->new_child->rate)
++		clk_change_rate(clk->new_child, clk->new_rate);
+ }
+ 
+ static int clk_core_set_rate_nolock(struct clk_core *clk,
+@@ -1749,6 +1753,7 @@ static int clk_core_set_rate_nolock(stru
+ 	struct clk_core *top, *fail_clk;
+ 	unsigned long rate = req_rate;
+ 	int ret = 0;
++	unsigned long parent_rate;
+ 
+ 	if (!clk)
+ 		return 0;
+@@ -1774,8 +1779,13 @@ static int clk_core_set_rate_nolock(stru
+ 		return -EBUSY;
+ 	}
+ 
++	if (top->parent)
++		parent_rate = top->parent->rate;
++	else
++		parent_rate = 0;
++
+ 	/* change the rates */
+-	clk_change_rate(top);
++	clk_change_rate(top, parent_rate);
+ 
+ 	clk->req_rate = req_rate;
+ 

target/linux/ipq806x/patches-4.0/136-clk-Add-safe-switch-hook.patch

@@ -0,0 +1,164 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v3,04/13] clk: Add safe switch hook
+From: Stephen Boyd <[email protected]>
+X-Patchwork-Id: 6063211
+Message-Id: <[email protected]>
+To: Mike Turquette <[email protected]>, Stephen Boyd <[email protected]>
+Cc: [email protected], [email protected],
+	[email protected], [email protected],
+	Viresh Kumar <[email protected]>
+Date: Fri, 20 Mar 2015 23:45:23 -0700
+
+Sometimes clocks can't accept their parent source turning off
+while the source is reprogrammed to a different rate. Most
+notably CPU clocks require a way to switch away from the current
+PLL they're running on, reprogram that PLL to a new rate, and
+then switch back to the PLL with the new rate once they're done.
+Add a hook that drivers can implement allowing them to return a
+'safe parent' that they can switch their parent to while the
+upstream source is reprogrammed to support this.
+
+Signed-off-by: Stephen Boyd <[email protected]>
+
+---
+This patch is good enough for Krait, but soon I'll need to 
+support a "safe rate" where we ask a clock what rate it needs to be running
+at to be sure it's within voltage constraints. Right now safe parent
+handles that problem on Krait, but on other platforms it won't work.
+
+ drivers/clk/clk.c            | 61 ++++++++++++++++++++++++++++++++++++++------
+ include/linux/clk-provider.h |  1 +
+ 2 files changed, 54 insertions(+), 8 deletions(-)
+
+--- a/drivers/clk/clk.c
++++ b/drivers/clk/clk.c
+@@ -56,9 +56,12 @@ struct clk_core {
+ 	struct clk_core		**parents;
+ 	u8			num_parents;
+ 	u8			new_parent_index;
++	u8			safe_parent_index;
+ 	unsigned long		rate;
+ 	unsigned long		req_rate;
++	unsigned long		old_rate;
+ 	unsigned long		new_rate;
++	struct clk_core		*safe_parent;
+ 	struct clk_core		*new_parent;
+ 	struct clk_core		*new_child;
+ 	unsigned long		flags;
+@@ -1549,7 +1552,8 @@ out:
+ static void clk_calc_subtree(struct clk_core *clk, unsigned long new_rate,
+ 			     struct clk_core *new_parent, u8 p_index)
+ {
+-	struct clk_core *child;
++	struct clk_core *child, *parent;
++	struct clk_hw *parent_hw;
+ 
+ 	clk->new_rate = new_rate;
+ 	clk->new_parent = new_parent;
+@@ -1559,6 +1563,18 @@ static void clk_calc_subtree(struct clk_
+ 	if (new_parent && new_parent != clk->parent)
+ 		new_parent->new_child = clk;
+ 
++	if (clk->ops->get_safe_parent) {
++		parent_hw = clk->ops->get_safe_parent(clk->hw);
++		if (parent_hw) {
++			parent = parent_hw->core;
++			p_index = clk_fetch_parent_index(clk, parent);
++			clk->safe_parent_index = p_index;
++			clk->safe_parent = parent;
++		}
++	} else {
++		clk->safe_parent = NULL;
++	}
++
+ 	hlist_for_each_entry(child, &clk->children, child_node) {
+ 		child->new_rate = clk_recalc(child, new_rate);
+ 		clk_calc_subtree(child, child->new_rate, NULL, 0);
+@@ -1654,14 +1670,43 @@ static struct clk_core *clk_propagate_ra
+ 						  unsigned long event)
+ {
+ 	struct clk_core *child, *tmp_clk, *fail_clk = NULL;
++	struct clk_core *old_parent;
+ 	int ret = NOTIFY_DONE;
+ 
+-	if (clk->rate == clk->new_rate)
++	if (clk->rate == clk->new_rate && event != POST_RATE_CHANGE)
+ 		return NULL;
+ 
++	switch (event) {
++	case PRE_RATE_CHANGE:
++		if (clk->safe_parent)
++			clk->ops->set_parent(clk->hw, clk->safe_parent_index);
++		clk->old_rate = clk->rate;
++		break;
++	case POST_RATE_CHANGE:
++		if (clk->safe_parent) {
++			old_parent = __clk_set_parent_before(clk,
++							     clk->new_parent);
++			if (clk->ops->set_rate_and_parent) {
++				clk->ops->set_rate_and_parent(clk->hw,
++						clk->new_rate,
++						clk->new_parent ?
++						clk->new_parent->rate : 0,
++						clk->new_parent_index);
++			} else if (clk->ops->set_parent) {
++				clk->ops->set_parent(clk->hw,
++						clk->new_parent_index);
++			}
++			__clk_set_parent_after(clk, clk->new_parent,
++					       old_parent);
++		}
++		break;
++	}
++
+ 	if (clk->notifier_count) {
+-		ret = __clk_notify(clk, event, clk->rate, clk->new_rate);
+-		if (ret & NOTIFY_STOP_MASK)
++		if (event != POST_RATE_CHANGE || clk->old_rate != clk->rate)
++			ret = __clk_notify(clk, event, clk->old_rate,
++					   clk->new_rate);
++		if (ret & NOTIFY_STOP_MASK && event != POST_RATE_CHANGE)
+ 			fail_clk = clk;
+ 	}
+ 
+@@ -1707,7 +1752,8 @@ clk_change_rate(struct clk_core *clk, un
+ 
+ 	old_rate = clk->rate;
+ 
+-	if (clk->new_parent && clk->new_parent != clk->parent) {
++	if (clk->new_parent && clk->new_parent != clk->parent &&
++			!clk->safe_parent) {
+ 		old_parent = __clk_set_parent_before(clk, clk->new_parent);
+ 
+ 		if (clk->ops->set_rate_and_parent) {
+@@ -1727,9 +1773,6 @@ clk_change_rate(struct clk_core *clk, un
+ 
+ 	clk->rate = clk->new_rate;
+ 
+-	if (clk->notifier_count && old_rate != clk->rate)
+-		__clk_notify(clk, POST_RATE_CHANGE, old_rate, clk->rate);
+-
+ 	/*
+ 	 * Use safe iteration, as change_rate can actually swap parents
+ 	 * for certain clock types.
+@@ -1789,6 +1832,8 @@ static int clk_core_set_rate_nolock(stru
+ 
+ 	clk->req_rate = req_rate;
+ 
++	clk_propagate_rate_change(top, POST_RATE_CHANGE);
++
+ 	return ret;
+ }
+ 
+--- a/include/linux/clk-provider.h
++++ b/include/linux/clk-provider.h
+@@ -183,6 +183,7 @@ struct clk_ops {
+ 					  struct clk_hw **best_parent_hw);
+ 	int		(*set_parent)(struct clk_hw *hw, u8 index);
+ 	u8		(*get_parent)(struct clk_hw *hw);
++	struct clk_hw	*(*get_safe_parent)(struct clk_hw *hw);
+ 	int		(*set_rate)(struct clk_hw *hw, unsigned long rate,
+ 				    unsigned long parent_rate);
+ 	int		(*set_rate_and_parent)(struct clk_hw *hw,

target/linux/ipq806x/patches-4.0/137-clk-qcom-Add-support-for-High-Frequency-PLLs-HFPLLs.patch

@@ -0,0 +1,351 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v3,05/13] clk: qcom: Add support for High-Frequency PLLs (HFPLLs)
+From: Stephen Boyd <[email protected]>
+X-Patchwork-Id: 6063261
+Message-Id: <[email protected]>
+To: Mike Turquette <[email protected]>, Stephen Boyd <[email protected]>
+Cc: [email protected], [email protected],
+	[email protected], [email protected],
+	Viresh Kumar <[email protected]>
+Date: Fri, 20 Mar 2015 23:45:24 -0700
+
+HFPLLs are the main frequency source for Krait CPU clocks. Add
+support for changing the rate of these PLLs.
+
+Signed-off-by: Stephen Boyd <[email protected]>
+
+---
+I'd really like to get rid of __clk_hfpll_init_once() if possible...
+
+ drivers/clk/qcom/Makefile    |   1 +
+ drivers/clk/qcom/clk-hfpll.c | 253 +++++++++++++++++++++++++++++++++++++++++++
+ drivers/clk/qcom/clk-hfpll.h |  54 +++++++++
+ 3 files changed, 308 insertions(+)
+ create mode 100644 drivers/clk/qcom/clk-hfpll.c
+ create mode 100644 drivers/clk/qcom/clk-hfpll.h
+
+--- a/drivers/clk/qcom/Makefile
++++ b/drivers/clk/qcom/Makefile
+@@ -8,6 +8,7 @@ clk-qcom-y += clk-rcg2.o
+ clk-qcom-y += clk-branch.o
+ clk-qcom-y += clk-regmap-divider.o
+ clk-qcom-y += clk-regmap-mux.o
++clk-qcom-y += clk-hfpll.o
+ clk-qcom-y += reset.o
+ 
+ obj-$(CONFIG_APQ_GCC_8084) += gcc-apq8084.o
+--- /dev/null
++++ b/drivers/clk/qcom/clk-hfpll.c
+@@ -0,0 +1,253 @@
++/*
++ * Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 and
++ * only version 2 as published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ */
++#include <linux/kernel.h>
++#include <linux/export.h>
++#include <linux/regmap.h>
++#include <linux/delay.h>
++#include <linux/err.h>
++#include <linux/clk-provider.h>
++#include <linux/spinlock.h>
++
++#include "clk-regmap.h"
++#include "clk-hfpll.h"
++
++#define PLL_OUTCTRL	BIT(0)
++#define PLL_BYPASSNL	BIT(1)
++#define PLL_RESET_N	BIT(2)
++
++/* Initialize a HFPLL at a given rate and enable it. */
++static void __clk_hfpll_init_once(struct clk_hw *hw)
++{
++	struct clk_hfpll *h = to_clk_hfpll(hw);
++	struct hfpll_data const *hd = h->d;
++	struct regmap *regmap = h->clkr.regmap;
++
++	if (likely(h->init_done))
++		return;
++
++	/* Configure PLL parameters for integer mode. */
++	if (hd->config_val)
++		regmap_write(regmap, hd->config_reg, hd->config_val);
++	regmap_write(regmap, hd->m_reg, 0);
++	regmap_write(regmap, hd->n_reg, 1);
++
++	if (hd->user_reg) {
++		u32 regval = hd->user_val;
++		unsigned long rate;
++
++		rate = __clk_get_rate(hw->clk);
++
++		/* Pick the right VCO. */
++		if (hd->user_vco_mask && rate > hd->low_vco_max_rate)
++			regval |= hd->user_vco_mask;
++		regmap_write(regmap, hd->user_reg, regval);
++	}
++
++	if (hd->droop_reg)
++		regmap_write(regmap, hd->droop_reg, hd->droop_val);
++
++	h->init_done = true;
++}
++
++static void __clk_hfpll_enable(struct clk_hw *hw)
++{
++	struct clk_hfpll *h = to_clk_hfpll(hw);
++	struct hfpll_data const *hd = h->d;
++	struct regmap *regmap = h->clkr.regmap;
++	u32 val;
++
++	__clk_hfpll_init_once(hw);
++
++	/* Disable PLL bypass mode. */
++	regmap_update_bits(regmap, hd->mode_reg, PLL_BYPASSNL, PLL_BYPASSNL);
++
++	/*
++	 * H/W requires a 5us delay between disabling the bypass and
++	 * de-asserting the reset. Delay 10us just to be safe.
++	 */
++	udelay(10);
++
++	/* De-assert active-low PLL reset. */
++	regmap_update_bits(regmap, hd->mode_reg, PLL_RESET_N, PLL_RESET_N);
++
++	/* Wait for PLL to lock. */
++	if (hd->status_reg) {
++		do {
++			regmap_read(regmap, hd->status_reg, &val);
++		} while (!(val & BIT(hd->lock_bit)));
++	} else {
++		udelay(60);
++	}
++
++	/* Enable PLL output. */
++	regmap_update_bits(regmap, hd->mode_reg, PLL_OUTCTRL, PLL_OUTCTRL);
++}
++
++/* Enable an already-configured HFPLL. */
++static int clk_hfpll_enable(struct clk_hw *hw)
++{
++	unsigned long flags;
++	struct clk_hfpll *h = to_clk_hfpll(hw);
++	struct hfpll_data const *hd = h->d;
++	struct regmap *regmap = h->clkr.regmap;
++	u32 mode;
++
++	spin_lock_irqsave(&h->lock, flags);
++	regmap_read(regmap, hd->mode_reg, &mode);
++	if (!(mode & (PLL_BYPASSNL | PLL_RESET_N | PLL_OUTCTRL)))
++		__clk_hfpll_enable(hw);
++	spin_unlock_irqrestore(&h->lock, flags);
++
++	return 0;
++}
++
++static void __clk_hfpll_disable(struct clk_hfpll *h)
++{
++	struct hfpll_data const *hd = h->d;
++	struct regmap *regmap = h->clkr.regmap;
++
++	/*
++	 * Disable the PLL output, disable test mode, enable the bypass mode,
++	 * and assert the reset.
++	 */
++	regmap_update_bits(regmap, hd->mode_reg,
++			PLL_BYPASSNL | PLL_RESET_N | PLL_OUTCTRL, 0);
++}
++
++static void clk_hfpll_disable(struct clk_hw *hw)
++{
++	struct clk_hfpll *h = to_clk_hfpll(hw);
++	unsigned long flags;
++
++	spin_lock_irqsave(&h->lock, flags);
++	__clk_hfpll_disable(h);
++	spin_unlock_irqrestore(&h->lock, flags);
++}
++
++static long clk_hfpll_round_rate(struct clk_hw *hw, unsigned long rate,
++				 unsigned long *parent_rate)
++{
++	struct clk_hfpll *h = to_clk_hfpll(hw);
++	struct hfpll_data const *hd = h->d;
++	unsigned long rrate;
++
++	rate = clamp(rate, hd->min_rate, hd->max_rate);
++
++	rrate = DIV_ROUND_UP(rate, *parent_rate) * *parent_rate;
++	if (rrate > hd->max_rate)
++		rrate -= *parent_rate;
++
++	return rrate;
++}
++
++/*
++ * For optimization reasons, assumes no downstream clocks are actively using
++ * it.
++ */
++static int clk_hfpll_set_rate(struct clk_hw *hw, unsigned long rate,
++			      unsigned long parent_rate)
++{
++	struct clk_hfpll *h = to_clk_hfpll(hw);
++	struct hfpll_data const *hd = h->d;
++	struct regmap *regmap = h->clkr.regmap;
++	unsigned long flags;
++	u32 l_val, val;
++	bool enabled;
++
++	l_val = rate / parent_rate;
++
++	spin_lock_irqsave(&h->lock, flags);
++
++	enabled = __clk_is_enabled(hw->clk);
++	if (enabled)
++		__clk_hfpll_disable(h);
++
++	/* Pick the right VCO. */
++	if (hd->user_reg && hd->user_vco_mask) {
++		regmap_read(regmap, hd->user_reg, &val);
++		if (rate <= hd->low_vco_max_rate)
++			val &= ~hd->user_vco_mask;
++		else
++			val |= hd->user_vco_mask;
++		regmap_write(regmap, hd->user_reg, val);
++	}
++
++	regmap_write(regmap, hd->l_reg, l_val);
++
++	if (enabled)
++		__clk_hfpll_enable(hw);
++
++	spin_unlock_irqrestore(&h->lock, flags);
++
++	return 0;
++}
++
++static unsigned long clk_hfpll_recalc_rate(struct clk_hw *hw,
++					   unsigned long parent_rate)
++{
++	struct clk_hfpll *h = to_clk_hfpll(hw);
++	struct hfpll_data const *hd = h->d;
++	struct regmap *regmap = h->clkr.regmap;
++	u32 l_val;
++
++	regmap_read(regmap, hd->l_reg, &l_val);
++
++	return l_val * parent_rate;
++}
++
++static void clk_hfpll_init(struct clk_hw *hw)
++{
++	struct clk_hfpll *h = to_clk_hfpll(hw);
++	struct hfpll_data const *hd = h->d;
++	struct regmap *regmap = h->clkr.regmap;
++	u32 mode, status;
++
++	regmap_read(regmap, hd->mode_reg, &mode);
++	if (mode != (PLL_BYPASSNL | PLL_RESET_N | PLL_OUTCTRL)) {
++		__clk_hfpll_init_once(hw);
++		return;
++	}
++
++	if (hd->status_reg) {
++		regmap_read(regmap, hd->status_reg, &status);
++		if (!(status & BIT(hd->lock_bit))) {
++			WARN(1, "HFPLL %s is ON, but not locked!\n",
++					__clk_get_name(hw->clk));
++			clk_hfpll_disable(hw);
++			__clk_hfpll_init_once(hw);
++		}
++	}
++}
++
++static int hfpll_is_enabled(struct clk_hw *hw)
++{
++	struct clk_hfpll *h = to_clk_hfpll(hw);
++	struct hfpll_data const *hd = h->d;
++	struct regmap *regmap = h->clkr.regmap;
++	u32 mode;
++
++	regmap_read(regmap, hd->mode_reg, &mode);
++	mode &= 0x7;
++	return mode == (PLL_BYPASSNL | PLL_RESET_N | PLL_OUTCTRL);
++}
++
++const struct clk_ops clk_ops_hfpll = {
++	.enable = clk_hfpll_enable,
++	.disable = clk_hfpll_disable,
++	.is_enabled = hfpll_is_enabled,
++	.round_rate = clk_hfpll_round_rate,
++	.set_rate = clk_hfpll_set_rate,
++	.recalc_rate = clk_hfpll_recalc_rate,
++	.init = clk_hfpll_init,
++};
++EXPORT_SYMBOL_GPL(clk_ops_hfpll);
+--- /dev/null
++++ b/drivers/clk/qcom/clk-hfpll.h
+@@ -0,0 +1,54 @@
++/*
++ * Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 and
++ * only version 2 as published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ */
++#ifndef __QCOM_CLK_HFPLL_H__
++#define __QCOM_CLK_HFPLL_H__
++
++#include <linux/clk-provider.h>
++#include <linux/spinlock.h>
++#include "clk-regmap.h"
++
++struct hfpll_data {
++	u32 mode_reg;
++	u32 l_reg;
++	u32 m_reg;
++	u32 n_reg;
++	u32 user_reg;
++	u32 droop_reg;
++	u32 config_reg;
++	u32 status_reg;
++	u8  lock_bit;
++
++	u32 droop_val;
++	u32 config_val;
++	u32 user_val;
++	u32 user_vco_mask;
++	unsigned long low_vco_max_rate;
++
++	unsigned long min_rate;
++	unsigned long max_rate;
++};
++
++struct clk_hfpll {
++	struct hfpll_data const *d;
++	int init_done;
++
++	struct clk_regmap clkr;
++	spinlock_t lock;
++};
++
++#define to_clk_hfpll(_hw) \
++	container_of(to_clk_regmap(_hw), struct clk_hfpll, clkr)
++
++extern const struct clk_ops clk_ops_hfpll;
++
++#endif

target/linux/ipq806x/patches-4.0/138-clk-qcom-Add-HFPLL-driver.patch

@@ -0,0 +1,206 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v3,06/13] clk: qcom: Add HFPLL driver
+From: Stephen Boyd <[email protected]>
+X-Patchwork-Id: 6063231
+Message-Id: <[email protected]>
+To: Mike Turquette <[email protected]>, Stephen Boyd <[email protected]>
+Cc: [email protected], [email protected],
+	[email protected], [email protected],
+	Viresh Kumar <[email protected]>, <[email protected]>
+Date: Fri, 20 Mar 2015 23:45:25 -0700
+
+On some devices (MSM8974 for example), the HFPLLs are
+instantiated within the Krait processor subsystem as separate
+register regions. Add a driver for these PLLs so that we can
+provide HFPLL clocks for use by the system.
+
+Cc: <[email protected]>
+Signed-off-by: Stephen Boyd <[email protected]>
+
+---
+.../devicetree/bindings/clock/qcom,hfpll.txt       |  40 ++++++++
+ drivers/clk/qcom/Kconfig                           |   8 ++
+ drivers/clk/qcom/Makefile                          |   1 +
+ drivers/clk/qcom/hfpll.c                           | 109 +++++++++++++++++++++
+ 4 files changed, 158 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/clock/qcom,hfpll.txt
+ create mode 100644 drivers/clk/qcom/hfpll.c
+
+--- /dev/null
++++ b/Documentation/devicetree/bindings/clock/qcom,hfpll.txt
+@@ -0,0 +1,40 @@
++High-Frequency PLL (HFPLL)
++
++PROPERTIES
++
++- compatible:
++	Usage: required
++	Value type: <string>
++	Definition: must be "qcom,hfpll"
++
++- reg:
++	Usage: required
++	Value type: <prop-encoded-array>
++	Definition: address and size of HPLL registers. An optional second
++		    element specifies the address and size of the alias
++		    register region.
++
++- clock-output-names:
++	Usage: required
++	Value type: <string>
++	Definition: Name of the PLL. Typically hfpllX where X is a CPU number
++		    starting at 0. Otherwise hfpll_Y where Y is more specific
++		    such as "l2".
++
++Example:
++
++1) An HFPLL for the L2 cache.
++
++	clock-controller@f9016000 {
++		compatible = "qcom,hfpll";
++		reg = <0xf9016000 0x30>;
++		clock-output-names = "hfpll_l2";
++	};
++
++2) An HFPLL for CPU0. This HFPLL has the alias register region.
++
++	clock-controller@f908a000 {
++		compatible = "qcom,hfpll";
++		reg = <0xf908a000 0x30>, <0xf900a000 0x30>;
++		clock-output-names = "hfpll0";
++	};
+--- a/drivers/clk/qcom/Kconfig
++++ b/drivers/clk/qcom/Kconfig
+@@ -88,3 +88,11 @@ config MSM_MMCC_8974
+ 	  Support for the multimedia clock controller on msm8974 devices.
+ 	  Say Y if you want to support multimedia devices such as display,
+ 	  graphics, video encode/decode, camera, etc.
++
++config QCOM_HFPLL
++	tristate "High-Frequency PLL (HFPLL) Clock Controller"
++	depends on COMMON_CLK_QCOM
++	help
++	  Support for the high-frequency PLLs present on Qualcomm devices.
++	  Say Y if you want to support CPU frequency scaling on devices
++	  such as MSM8974, APQ8084, etc.
+--- a/drivers/clk/qcom/Makefile
++++ b/drivers/clk/qcom/Makefile
+@@ -21,3 +21,4 @@ obj-$(CONFIG_MSM_LCC_8960) += lcc-msm896
+ obj-$(CONFIG_MSM_GCC_8974) += gcc-msm8974.o
+ obj-$(CONFIG_MSM_MMCC_8960) += mmcc-msm8960.o
+ obj-$(CONFIG_MSM_MMCC_8974) += mmcc-msm8974.o
++obj-$(CONFIG_QCOM_HFPLL) += hfpll.o
+--- /dev/null
++++ b/drivers/clk/qcom/hfpll.c
+@@ -0,0 +1,109 @@
++/*
++ * Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 and
++ * only version 2 as published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ */
++
++#include <linux/kernel.h>
++#include <linux/init.h>
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/of.h>
++#include <linux/clk.h>
++#include <linux/clk-provider.h>
++#include <linux/regmap.h>
++
++#include "clk-regmap.h"
++#include "clk-hfpll.h"
++
++static const struct hfpll_data hdata = {
++	.mode_reg = 0x00,
++	.l_reg = 0x04,
++	.m_reg = 0x08,
++	.n_reg = 0x0c,
++	.user_reg = 0x10,
++	.config_reg = 0x14,
++	.config_val = 0x430405d,
++	.status_reg = 0x1c,
++	.lock_bit = 16,
++
++	.user_val = 0x8,
++	.user_vco_mask = 0x100000,
++	.low_vco_max_rate = 1248000000,
++	.min_rate = 537600000UL,
++	.max_rate = 2900000000UL,
++};
++
++static const struct of_device_id qcom_hfpll_match_table[] = {
++	{ .compatible = "qcom,hfpll" },
++	{ }
++};
++MODULE_DEVICE_TABLE(of, qcom_hfpll_match_table);
++
++static const struct regmap_config hfpll_regmap_config = {
++	.reg_bits	= 32,
++	.reg_stride	= 4,
++	.val_bits	= 32,
++	.max_register	= 0x30,
++	.fast_io	= true,
++};
++
++static int qcom_hfpll_probe(struct platform_device *pdev)
++{
++	struct clk *clk;
++	struct resource *res;
++	struct device *dev = &pdev->dev;
++	void __iomem *base;
++	struct regmap *regmap;
++	struct clk_hfpll *h;
++	struct clk_init_data init = {
++		.parent_names = (const char *[]){ "xo" },
++		.num_parents = 1,
++		.ops = &clk_ops_hfpll,
++	};
++
++	h = devm_kzalloc(dev, sizeof(*h), GFP_KERNEL);
++	if (!h)
++		return -ENOMEM;
++
++	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++	base = devm_ioremap_resource(dev, res);
++	if (IS_ERR(base))
++		return PTR_ERR(base);
++
++	regmap = devm_regmap_init_mmio(&pdev->dev, base, &hfpll_regmap_config);
++	if (IS_ERR(regmap))
++		return PTR_ERR(regmap);
++
++	if (of_property_read_string_index(dev->of_node, "clock-output-names",
++						  0, &init.name))
++		return -ENODEV;
++
++	h->d = &hdata;
++	h->clkr.hw.init = &init;
++	spin_lock_init(&h->lock);
++
++	clk = devm_clk_register_regmap(&pdev->dev, &h->clkr);
++
++	return PTR_ERR_OR_ZERO(clk);
++}
++
++static struct platform_driver qcom_hfpll_driver = {
++	.probe		= qcom_hfpll_probe,
++	.driver		= {
++		.name	= "qcom-hfpll",
++		.of_match_table = qcom_hfpll_match_table,
++	},
++};
++module_platform_driver(qcom_hfpll_driver);
++
++MODULE_DESCRIPTION("QCOM HFPLL Clock Driver");
++MODULE_LICENSE("GPL v2");
++MODULE_ALIAS("platform:qcom-hfpll");

target/linux/ipq806x/patches-4.0/139-clk-qcom-Add-IPQ806X-s-HFPLLs.patch

@@ -0,0 +1,127 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v3,08/13] clk: qcom: Add IPQ806X's HFPLLs
+From: Stephen Boyd <[email protected]>
+X-Patchwork-Id: 6063241
+Message-Id: <[email protected]>
+To: Mike Turquette <[email protected]>, Stephen Boyd <[email protected]>
+Cc: [email protected], [email protected],
+	[email protected], [email protected],
+	Viresh Kumar <[email protected]>
+Date: Fri, 20 Mar 2015 23:45:27 -0700
+
+Describe the HFPLLs present on IPQ806X devices.
+
+Signed-off-by: Stephen Boyd <[email protected]>
+
+---
+drivers/clk/qcom/gcc-ipq806x.c | 83 ++++++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 83 insertions(+)
+
+--- a/drivers/clk/qcom/gcc-ipq806x.c
++++ b/drivers/clk/qcom/gcc-ipq806x.c
+@@ -30,6 +30,7 @@
+ #include "clk-pll.h"
+ #include "clk-rcg.h"
+ #include "clk-branch.h"
++#include "clk-hfpll.h"
+ #include "reset.h"
+ 
+ static struct clk_pll pll0 = {
+@@ -113,6 +114,85 @@ static struct clk_regmap pll8_vote = {
+ 	},
+ };
+ 
++static struct hfpll_data hfpll0_data = {
++	.mode_reg = 0x3200,
++	.l_reg = 0x3208,
++	.m_reg = 0x320c,
++	.n_reg = 0x3210,
++	.config_reg = 0x3204,
++	.status_reg = 0x321c,
++	.config_val = 0x7845c665,
++	.droop_reg = 0x3214,
++	.droop_val = 0x0108c000,
++	.min_rate = 600000000UL,
++	.max_rate = 1800000000UL,
++};
++
++static struct clk_hfpll hfpll0 = {
++	.d = &hfpll0_data,
++	.clkr.hw.init = &(struct clk_init_data){
++		.parent_names = (const char *[]){ "pxo" },
++		.num_parents = 1,
++		.name = "hfpll0",
++		.ops = &clk_ops_hfpll,
++		.flags = CLK_IGNORE_UNUSED,
++	},
++	.lock = __SPIN_LOCK_UNLOCKED(hfpll0.lock),
++};
++
++static struct hfpll_data hfpll1_data = {
++	.mode_reg = 0x3240,
++	.l_reg = 0x3248,
++	.m_reg = 0x324c,
++	.n_reg = 0x3250,
++	.config_reg = 0x3244,
++	.status_reg = 0x325c,
++	.config_val = 0x7845c665,
++	.droop_reg = 0x3314,
++	.droop_val = 0x0108c000,
++	.min_rate = 600000000UL,
++	.max_rate = 1800000000UL,
++};
++
++static struct clk_hfpll hfpll1 = {
++	.d = &hfpll1_data,
++	.clkr.hw.init = &(struct clk_init_data){
++		.parent_names = (const char *[]){ "pxo" },
++		.num_parents = 1,
++		.name = "hfpll1",
++		.ops = &clk_ops_hfpll,
++		.flags = CLK_IGNORE_UNUSED,
++	},
++	.lock = __SPIN_LOCK_UNLOCKED(hfpll1.lock),
++};
++
++static struct hfpll_data hfpll_l2_data = {
++	.mode_reg = 0x3300,
++	.l_reg = 0x3308,
++	.m_reg = 0x330c,
++	.n_reg = 0x3310,
++	.config_reg = 0x3304,
++	.status_reg = 0x331c,
++	.config_val = 0x7845c665,
++	.droop_reg = 0x3314,
++	.droop_val = 0x0108c000,
++	.min_rate = 600000000UL,
++	.max_rate = 1800000000UL,
++};
++
++static struct clk_hfpll hfpll_l2 = {
++	.d = &hfpll_l2_data,
++	.clkr.hw.init = &(struct clk_init_data){
++		.parent_names = (const char *[]){ "pxo" },
++		.num_parents = 1,
++		.name = "hfpll_l2",
++		.ops = &clk_ops_hfpll,
++		.flags = CLK_IGNORE_UNUSED,
++	},
++	.lock = __SPIN_LOCK_UNLOCKED(hfpll_l2.lock),
++};
++
++
+ static struct clk_pll pll14 = {
+ 	.l_reg = 0x31c4,
+ 	.m_reg = 0x31c8,
+@@ -2273,6 +2353,9 @@ static struct clk_regmap *gcc_ipq806x_cl
+ 	[USB_FS1_XCVR_SRC] = &usb_fs1_xcvr_clk_src.clkr,
+ 	[USB_FS1_XCVR_CLK] = &usb_fs1_xcvr_clk.clkr,
+ 	[USB_FS1_SYSTEM_CLK] = &usb_fs1_sys_clk.clkr,
++	[PLL9] = &hfpll0.clkr,
++	[PLL10] = &hfpll1.clkr,
++	[PLL12] = &hfpll_l2.clkr,
+ };
+ 
+ static const struct qcom_reset_map gcc_ipq806x_resets[] = {

target/linux/ipq806x/patches-4.0/140-clk-qcom-Add-support-for-Krait-clocks.patch

@@ -0,0 +1,271 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v3,09/13] clk: qcom: Add support for Krait clocks
+From: Stephen Boyd <[email protected]>
+X-Patchwork-Id: 6063251
+Message-Id: <[email protected]>
+To: Mike Turquette <[email protected]>, Stephen Boyd <[email protected]>
+Cc: [email protected], [email protected],
+	[email protected], [email protected],
+	Viresh Kumar <[email protected]>
+Date: Fri, 20 Mar 2015 23:45:28 -0700
+
+The Krait clocks are made up of a series of muxes and a divider
+that choose between a fixed rate clock and dedicated HFPLLs for
+each CPU. Instead of using mmio accesses to remux parents, the
+Krait implementation exposes the remux control via cp15
+registers. Support these clocks.
+
+Signed-off-by: Stephen Boyd <[email protected]>
+
+---
+drivers/clk/qcom/Kconfig     |   4 ++
+ drivers/clk/qcom/Makefile    |   1 +
+ drivers/clk/qcom/clk-krait.c | 166 +++++++++++++++++++++++++++++++++++++++++++
+ drivers/clk/qcom/clk-krait.h |  49 +++++++++++++
+ 4 files changed, 220 insertions(+)
+ create mode 100644 drivers/clk/qcom/clk-krait.c
+ create mode 100644 drivers/clk/qcom/clk-krait.h
+
+--- a/drivers/clk/qcom/Kconfig
++++ b/drivers/clk/qcom/Kconfig
+@@ -96,3 +96,7 @@ config QCOM_HFPLL
+ 	  Support for the high-frequency PLLs present on Qualcomm devices.
+ 	  Say Y if you want to support CPU frequency scaling on devices
+ 	  such as MSM8974, APQ8084, etc.
++
++config KRAIT_CLOCKS
++	bool
++	select KRAIT_L2_ACCESSORS
+--- a/drivers/clk/qcom/Makefile
++++ b/drivers/clk/qcom/Makefile
+@@ -8,6 +8,7 @@ clk-qcom-y += clk-rcg2.o
+ clk-qcom-y += clk-branch.o
+ clk-qcom-y += clk-regmap-divider.o
+ clk-qcom-y += clk-regmap-mux.o
++clk-qcom-$(CONFIG_KRAIT_CLOCKS) += clk-krait.o
+ clk-qcom-y += clk-hfpll.o
+ clk-qcom-y += reset.o
+ 
+--- /dev/null
++++ b/drivers/clk/qcom/clk-krait.c
+@@ -0,0 +1,166 @@
++/*
++ * Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 and
++ * only version 2 as published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ */
++
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/io.h>
++#include <linux/delay.h>
++#include <linux/err.h>
++#include <linux/clk-provider.h>
++#include <linux/spinlock.h>
++
++#include <asm/krait-l2-accessors.h>
++
++#include "clk-krait.h"
++
++/* Secondary and primary muxes share the same cp15 register */
++static DEFINE_SPINLOCK(krait_clock_reg_lock);
++
++#define LPL_SHIFT	8
++static void __krait_mux_set_sel(struct krait_mux_clk *mux, int sel)
++{
++	unsigned long flags;
++	u32 regval;
++
++	spin_lock_irqsave(&krait_clock_reg_lock, flags);
++	regval = krait_get_l2_indirect_reg(mux->offset);
++	regval &= ~(mux->mask << mux->shift);
++	regval |= (sel & mux->mask) << mux->shift;
++	if (mux->lpl) {
++		regval &= ~(mux->mask << (mux->shift + LPL_SHIFT));
++		regval |= (sel & mux->mask) << (mux->shift + LPL_SHIFT);
++	}
++	krait_set_l2_indirect_reg(mux->offset, regval);
++	spin_unlock_irqrestore(&krait_clock_reg_lock, flags);
++
++	/* Wait for switch to complete. */
++	mb();
++	udelay(1);
++}
++
++static int krait_mux_set_parent(struct clk_hw *hw, u8 index)
++{
++	struct krait_mux_clk *mux = to_krait_mux_clk(hw);
++	u32 sel;
++
++	sel = clk_mux_reindex(index, mux->parent_map, 0);
++	mux->en_mask = sel;
++	/* Don't touch mux if CPU is off as it won't work */
++	if (__clk_is_enabled(hw->clk))
++		__krait_mux_set_sel(mux, sel);
++	return 0;
++}
++
++static u8 krait_mux_get_parent(struct clk_hw *hw)
++{
++	struct krait_mux_clk *mux = to_krait_mux_clk(hw);
++	u32 sel;
++
++	sel = krait_get_l2_indirect_reg(mux->offset);
++	sel >>= mux->shift;
++	sel &= mux->mask;
++	mux->en_mask = sel;
++
++	return clk_mux_get_parent(hw, sel, mux->parent_map, 0);
++}
++
++static struct clk_hw *krait_mux_get_safe_parent(struct clk_hw *hw)
++{
++	int i;
++	struct krait_mux_clk *mux = to_krait_mux_clk(hw);
++	int num_parents = __clk_get_num_parents(hw->clk);
++
++	i = mux->safe_sel;
++	for (i = 0; i < num_parents; i++)
++		if (mux->safe_sel == mux->parent_map[i])
++			break;
++
++	return __clk_get_hw(clk_get_parent_by_index(hw->clk, i));
++}
++
++static int krait_mux_enable(struct clk_hw *hw)
++{
++	struct krait_mux_clk *mux = to_krait_mux_clk(hw);
++
++	__krait_mux_set_sel(mux, mux->en_mask);
++
++	return 0;
++}
++
++static void krait_mux_disable(struct clk_hw *hw)
++{
++	struct krait_mux_clk *mux = to_krait_mux_clk(hw);
++
++	__krait_mux_set_sel(mux, mux->safe_sel);
++}
++
++const struct clk_ops krait_mux_clk_ops = {
++	.enable = krait_mux_enable,
++	.disable = krait_mux_disable,
++	.set_parent = krait_mux_set_parent,
++	.get_parent = krait_mux_get_parent,
++	.determine_rate = __clk_mux_determine_rate_closest,
++	.get_safe_parent = krait_mux_get_safe_parent,
++};
++EXPORT_SYMBOL_GPL(krait_mux_clk_ops);
++
++/* The divider can divide by 2, 4, 6 and 8. But we only really need div-2. */
++static long krait_div2_round_rate(struct clk_hw *hw, unsigned long rate,
++				  unsigned long *parent_rate)
++{
++	*parent_rate = __clk_round_rate(__clk_get_parent(hw->clk), rate * 2);
++	return DIV_ROUND_UP(*parent_rate, 2);
++}
++
++static int krait_div2_set_rate(struct clk_hw *hw, unsigned long rate,
++			unsigned long parent_rate)
++{
++	struct krait_div2_clk *d = to_krait_div2_clk(hw);
++	unsigned long flags;
++	u32 val;
++	u32 mask = BIT(d->width) - 1;
++
++	if (d->lpl)
++		mask = mask << (d->shift + LPL_SHIFT) | mask << d->shift;
++
++	spin_lock_irqsave(&krait_clock_reg_lock, flags);
++	val = krait_get_l2_indirect_reg(d->offset);
++	val &= ~mask;
++	krait_set_l2_indirect_reg(d->offset, val);
++	spin_unlock_irqrestore(&krait_clock_reg_lock, flags);
++
++	return 0;
++}
++
++static unsigned long
++krait_div2_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
++{
++	struct krait_div2_clk *d = to_krait_div2_clk(hw);
++	u32 mask = BIT(d->width) - 1;
++	u32 div;
++
++	div = krait_get_l2_indirect_reg(d->offset);
++	div >>= d->shift;
++	div &= mask;
++	div = (div + 1) * 2;
++
++	return DIV_ROUND_UP(parent_rate, div);
++}
++
++const struct clk_ops krait_div2_clk_ops = {
++	.round_rate = krait_div2_round_rate,
++	.set_rate = krait_div2_set_rate,
++	.recalc_rate = krait_div2_recalc_rate,
++};
++EXPORT_SYMBOL_GPL(krait_div2_clk_ops);
+--- /dev/null
++++ b/drivers/clk/qcom/clk-krait.h
+@@ -0,0 +1,49 @@
++/*
++ * Copyright (c) 2013, The Linux Foundation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 and
++ * only version 2 as published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ */
++
++#ifndef __QCOM_CLK_KRAIT_H
++#define __QCOM_CLK_KRAIT_H
++
++#include <linux/clk-provider.h>
++
++struct krait_mux_clk {
++	unsigned int	*parent_map;
++	bool		has_safe_parent;
++	u8		safe_sel;
++	u32		offset;
++	u32		mask;
++	u32		shift;
++	u32		en_mask;
++	bool		lpl;
++
++	struct clk_hw	hw;
++};
++
++#define to_krait_mux_clk(_hw) container_of(_hw, struct krait_mux_clk, hw)
++
++extern const struct clk_ops krait_mux_clk_ops;
++
++struct krait_div2_clk {
++	u32		offset;
++	u8		width;
++	u32		shift;
++	bool		lpl;
++
++	struct clk_hw	hw;
++};
++
++#define to_krait_div2_clk(_hw) container_of(_hw, struct krait_div2_clk, hw)
++
++extern const struct clk_ops krait_div2_clk_ops;
++
++#endif

target/linux/ipq806x/patches-4.0/141-clk-qcom-Add-KPSS-ACC-GCC-driver.patch

@@ -0,0 +1,205 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v3,10/13] clk: qcom: Add KPSS ACC/GCC driver
+From: Stephen Boyd <[email protected]>
+X-Patchwork-Id: 6063201
+Message-Id: <[email protected]>
+To: Mike Turquette <[email protected]>, Stephen Boyd <[email protected]>
+Cc: [email protected], [email protected],
+	[email protected], [email protected],
+	Viresh Kumar <[email protected]>, <[email protected]>
+Date: Fri, 20 Mar 2015 23:45:29 -0700
+
+The ACC and GCC regions present in KPSSv1 contain registers to
+control clocks and power to each Krait CPU and L2. For CPUfreq
+purposes probe these devices and expose a mux clock that chooses
+between PXO and PLL8.
+
+Cc: <[email protected]>
+Signed-off-by: Stephen Boyd <[email protected]>
+
+---
+.../devicetree/bindings/arm/msm/qcom,kpss-acc.txt  |  7 ++
+ .../devicetree/bindings/arm/msm/qcom,kpss-gcc.txt  | 28 +++++++
+ drivers/clk/qcom/Kconfig                           |  8 ++
+ drivers/clk/qcom/Makefile                          |  1 +
+ drivers/clk/qcom/kpss-xcc.c                        | 95 ++++++++++++++++++++++
+ 5 files changed, 139 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/arm/msm/qcom,kpss-gcc.txt
+ create mode 100644 drivers/clk/qcom/kpss-xcc.c
+
+--- a/Documentation/devicetree/bindings/arm/msm/qcom,kpss-acc.txt
++++ b/Documentation/devicetree/bindings/arm/msm/qcom,kpss-acc.txt
+@@ -21,10 +21,17 @@ PROPERTIES
+ 		    the register region. An optional second element specifies
+ 		    the base address and size of the alias register region.
+ 
++- clock-output-names:
++	Usage: optional
++	Value type: <string>
++	Definition: Name of the output clock. Typically acpuX_aux where X is a
++		    CPU number starting at 0.
++
+ Example:
+ 
+ 	clock-controller@2088000 {
+ 		compatible = "qcom,kpss-acc-v2";
+ 		reg = <0x02088000 0x1000>,
+ 		      <0x02008000 0x1000>;
++		clock-output-names = "acpu0_aux";
+ 	};
+--- /dev/null
++++ b/Documentation/devicetree/bindings/arm/msm/qcom,kpss-gcc.txt
+@@ -0,0 +1,28 @@
++Krait Processor Sub-system (KPSS) Global Clock Controller (GCC)
++
++PROPERTIES
++
++- compatible:
++	Usage: required
++	Value type: <string>
++	Definition: should be one of:
++			"qcom,kpss-gcc"
++
++- reg:
++	Usage: required
++	Value type: <prop-encoded-array>
++	Definition: base address and size of the register region
++
++- clock-output-names:
++	Usage: required
++	Value type: <string>
++	Definition: Name of the output clock. Typically acpu_l2_aux indicating
++		    an L2 cache auxiliary clock.
++
++Example:
++
++	l2cc: clock-controller@2011000 {
++		compatible = "qcom,kpss-gcc";
++		reg = <0x2011000 0x1000>;
++		clock-output-names = "acpu_l2_aux";
++	};
+--- a/drivers/clk/qcom/Kconfig
++++ b/drivers/clk/qcom/Kconfig
+@@ -97,6 +97,14 @@ config QCOM_HFPLL
+ 	  Say Y if you want to support CPU frequency scaling on devices
+ 	  such as MSM8974, APQ8084, etc.
+ 
++config KPSS_XCC
++	tristate "KPSS Clock Controller"
++	depends on COMMON_CLK_QCOM
++	help
++	  Support for the Krait ACC and GCC clock controllers. Say Y
++	  if you want to support CPU frequency scaling on devices such
++	  as MSM8960, APQ8064, etc.
++
+ config KRAIT_CLOCKS
+ 	bool
+ 	select KRAIT_L2_ACCESSORS
+--- a/drivers/clk/qcom/Makefile
++++ b/drivers/clk/qcom/Makefile
+@@ -22,4 +22,5 @@ obj-$(CONFIG_MSM_LCC_8960) += lcc-msm896
+ obj-$(CONFIG_MSM_GCC_8974) += gcc-msm8974.o
+ obj-$(CONFIG_MSM_MMCC_8960) += mmcc-msm8960.o
+ obj-$(CONFIG_MSM_MMCC_8974) += mmcc-msm8974.o
++obj-$(CONFIG_KPSS_XCC) += kpss-xcc.o
+ obj-$(CONFIG_QCOM_HFPLL) += hfpll.o
+--- /dev/null
++++ b/drivers/clk/qcom/kpss-xcc.c
+@@ -0,0 +1,95 @@
++/* Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 and
++ * only version 2 as published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ */
++
++#include <linux/kernel.h>
++#include <linux/init.h>
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/err.h>
++#include <linux/io.h>
++#include <linux/of.h>
++#include <linux/of_device.h>
++#include <linux/clk.h>
++#include <linux/clk-provider.h>
++
++static const char *aux_parents[] = {
++	"pll8_vote",
++	"pxo",
++};
++
++static unsigned int aux_parent_map[] = {
++	3,
++	0,
++};
++
++static const struct of_device_id kpss_xcc_match_table[] = {
++	{ .compatible = "qcom,kpss-acc-v1", .data = (void *)1UL },
++	{ .compatible = "qcom,kpss-gcc" },
++	{}
++};
++MODULE_DEVICE_TABLE(of, kpss_xcc_match_table);
++
++static int kpss_xcc_driver_probe(struct platform_device *pdev)
++{
++	const struct of_device_id *id;
++	struct clk *clk;
++	struct resource *res;
++	void __iomem *base;
++	const char *name;
++
++	id = of_match_device(kpss_xcc_match_table, &pdev->dev);
++	if (!id)
++		return -ENODEV;
++
++	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++	base = devm_ioremap_resource(&pdev->dev, res);
++	if (IS_ERR(base))
++		return PTR_ERR(base);
++
++	if (id->data) {
++		if (of_property_read_string_index(pdev->dev.of_node,
++					"clock-output-names", 0, &name))
++			return -ENODEV;
++		base += 0x14;
++	} else {
++		name = "acpu_l2_aux";
++		base += 0x28;
++	}
++
++	clk = clk_register_mux_table(&pdev->dev, name, aux_parents,
++				     ARRAY_SIZE(aux_parents), 0, base, 0, 0x3,
++				     0, aux_parent_map, NULL);
++
++	platform_set_drvdata(pdev, clk);
++
++	return PTR_ERR_OR_ZERO(clk);
++}
++
++static int kpss_xcc_driver_remove(struct platform_device *pdev)
++{
++	clk_unregister_mux(platform_get_drvdata(pdev));
++	return 0;
++}
++
++static struct platform_driver kpss_xcc_driver = {
++	.probe = kpss_xcc_driver_probe,
++	.remove = kpss_xcc_driver_remove,
++	.driver = {
++		.name = "kpss-xcc",
++		.of_match_table = kpss_xcc_match_table,
++	},
++};
++module_platform_driver(kpss_xcc_driver);
++
++MODULE_DESCRIPTION("Krait Processor Sub System (KPSS) Clock Driver");
++MODULE_LICENSE("GPL v2");
++MODULE_ALIAS("platform:kpss-xcc");

target/linux/ipq806x/patches-4.0/142-clk-qcom-Add-Krait-clock-controller-driver.patch

@@ -0,0 +1,435 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v3,11/13] clk: qcom: Add Krait clock controller driver
+From: Stephen Boyd <[email protected]>
+X-Patchwork-Id: 6063121
+Message-Id: <[email protected]>
+To: Mike Turquette <[email protected]>, Stephen Boyd <[email protected]>
+Cc: [email protected], [email protected],
+	[email protected], [email protected],
+	Viresh Kumar <[email protected]>, <[email protected]>
+Date: Fri, 20 Mar 2015 23:45:30 -0700
+
+The Krait CPU clocks are made up of a primary mux and secondary
+mux for each CPU and the L2, controlled via cp15 accessors. For
+Kraits within KPSSv1 each secondary mux accepts a different aux
+source, but on KPSSv2 each secondary mux accepts the same aux
+source.
+
+Cc: <[email protected]>
+Signed-off-by: Stephen Boyd <[email protected]>
+
+---
+.../devicetree/bindings/clock/qcom,krait-cc.txt    |  22 ++
+ drivers/clk/qcom/Kconfig                           |   8 +
+ drivers/clk/qcom/Makefile                          |   1 +
+ drivers/clk/qcom/krait-cc.c                        | 352 +++++++++++++++++++++
+ 4 files changed, 383 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/clock/qcom,krait-cc.txt
+ create mode 100644 drivers/clk/qcom/krait-cc.c
+
+--- /dev/null
++++ b/Documentation/devicetree/bindings/clock/qcom,krait-cc.txt
+@@ -0,0 +1,22 @@
++Krait Clock Controller
++
++PROPERTIES
++
++- compatible:
++	Usage: required
++	Value type: <string>
++	Definition: must be one of:
++			"qcom,krait-cc-v1"
++			"qcom,krait-cc-v2"
++
++- #clock-cells:
++	Usage: required
++	Value type: <u32>
++	Definition: must be 1
++
++Example:
++
++	kraitcc: clock-controller {
++		compatible = "qcom,krait-cc-v1";
++		#clock-cells = <1>;
++	};
+--- a/drivers/clk/qcom/Kconfig
++++ b/drivers/clk/qcom/Kconfig
+@@ -105,6 +105,14 @@ config KPSS_XCC
+ 	  if you want to support CPU frequency scaling on devices such
+ 	  as MSM8960, APQ8064, etc.
+ 
++config KRAITCC
++	tristate "Krait Clock Controller"
++	depends on COMMON_CLK_QCOM && ARM
++	select KRAIT_CLOCKS
++	help
++	  Support for the Krait CPU clocks on Qualcomm devices.
++	  Say Y if you want to support CPU frequency scaling.
++
+ config KRAIT_CLOCKS
+ 	bool
+ 	select KRAIT_L2_ACCESSORS
+--- a/drivers/clk/qcom/Makefile
++++ b/drivers/clk/qcom/Makefile
+@@ -24,3 +24,4 @@ obj-$(CONFIG_MSM_MMCC_8960) += mmcc-msm8
+ obj-$(CONFIG_MSM_MMCC_8974) += mmcc-msm8974.o
+ obj-$(CONFIG_KPSS_XCC) += kpss-xcc.o
+ obj-$(CONFIG_QCOM_HFPLL) += hfpll.o
++obj-$(CONFIG_KRAITCC) += krait-cc.o
+--- /dev/null
++++ b/drivers/clk/qcom/krait-cc.c
+@@ -0,0 +1,352 @@
++/* Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 and
++ * only version 2 as published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ */
++
++#include <linux/kernel.h>
++#include <linux/init.h>
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/err.h>
++#include <linux/io.h>
++#include <linux/of.h>
++#include <linux/of_device.h>
++#include <linux/clk.h>
++#include <linux/clk-provider.h>
++#include <linux/slab.h>
++
++#include "clk-krait.h"
++
++static unsigned int sec_mux_map[] = {
++	2,
++	0,
++};
++
++static unsigned int pri_mux_map[] = {
++	1,
++	2,
++	0,
++};
++
++static int
++krait_add_div(struct device *dev, int id, const char *s, unsigned offset)
++{
++	struct krait_div2_clk *div;
++	struct clk_init_data init = {
++		.num_parents = 1,
++		.ops = &krait_div2_clk_ops,
++		.flags = CLK_SET_RATE_PARENT,
++	};
++	const char *p_names[1];
++	struct clk *clk;
++
++	div = devm_kzalloc(dev, sizeof(*div), GFP_KERNEL);
++	if (!div)
++		return -ENOMEM;
++
++	div->width = 2;
++	div->shift = 6;
++	div->lpl = id >= 0;
++	div->offset = offset;
++	div->hw.init = &init;
++
++	init.name = kasprintf(GFP_KERNEL, "hfpll%s_div", s);
++	if (!init.name)
++		return -ENOMEM;
++
++	init.parent_names = p_names;
++	p_names[0] = kasprintf(GFP_KERNEL, "hfpll%s", s);
++	if (!p_names[0]) {
++		kfree(init.name);
++		return -ENOMEM;
++	}
++
++	clk = devm_clk_register(dev, &div->hw);
++	kfree(p_names[0]);
++	kfree(init.name);
++
++	return PTR_ERR_OR_ZERO(clk);
++}
++
++static int
++krait_add_sec_mux(struct device *dev, int id, const char *s, unsigned offset,
++		  bool unique_aux)
++{
++	struct krait_mux_clk *mux;
++	static const char *sec_mux_list[] = {
++		"acpu_aux",
++		"qsb",
++	};
++	struct clk_init_data init = {
++		.parent_names = sec_mux_list,
++		.num_parents = ARRAY_SIZE(sec_mux_list),
++		.ops = &krait_mux_clk_ops,
++		.flags = CLK_SET_RATE_PARENT,
++	};
++	struct clk *clk;
++
++	mux = devm_kzalloc(dev, sizeof(*mux), GFP_KERNEL);
++	if (!mux)
++		return -ENOMEM;
++
++	mux->offset = offset;
++	mux->lpl = id >= 0;
++	mux->has_safe_parent = true;
++	mux->safe_sel = 2;
++	mux->mask = 0x3;
++	mux->shift = 2;
++	mux->parent_map = sec_mux_map;
++	mux->hw.init = &init;
++
++	init.name = kasprintf(GFP_KERNEL, "krait%s_sec_mux", s);
++	if (!init.name)
++		return -ENOMEM;
++
++	if (unique_aux) {
++		sec_mux_list[0] = kasprintf(GFP_KERNEL, "acpu%s_aux", s);
++		if (!sec_mux_list[0]) {
++			clk = ERR_PTR(-ENOMEM);
++			goto err_aux;
++		}
++	}
++
++	clk = devm_clk_register(dev, &mux->hw);
++
++	if (unique_aux)
++		kfree(sec_mux_list[0]);
++err_aux:
++	kfree(init.name);
++	return PTR_ERR_OR_ZERO(clk);
++}
++
++static struct clk *
++krait_add_pri_mux(struct device *dev, int id, const char *s, unsigned offset)
++{
++	struct krait_mux_clk *mux;
++	const char *p_names[3];
++	struct clk_init_data init = {
++		.parent_names = p_names,
++		.num_parents = ARRAY_SIZE(p_names),
++		.ops = &krait_mux_clk_ops,
++		.flags = CLK_SET_RATE_PARENT,
++	};
++	struct clk *clk;
++
++	mux = devm_kzalloc(dev, sizeof(*mux), GFP_KERNEL);
++	if (!mux)
++		return ERR_PTR(-ENOMEM);
++
++	mux->has_safe_parent = true;
++	mux->safe_sel = 0;
++	mux->mask = 0x3;
++	mux->shift = 0;
++	mux->offset = offset;
++	mux->lpl = id >= 0;
++	mux->parent_map = pri_mux_map;
++	mux->hw.init = &init;
++
++	init.name = kasprintf(GFP_KERNEL, "krait%s_pri_mux", s);
++	if (!init.name)
++		return ERR_PTR(-ENOMEM);
++
++	p_names[0] = kasprintf(GFP_KERNEL, "hfpll%s", s);
++	if (!p_names[0]) {
++		clk = ERR_PTR(-ENOMEM);
++		goto err_p0;
++	}
++
++	p_names[1] = kasprintf(GFP_KERNEL, "hfpll%s_div", s);
++	if (!p_names[1]) {
++		clk = ERR_PTR(-ENOMEM);
++		goto err_p1;
++	}
++
++	p_names[2] = kasprintf(GFP_KERNEL, "krait%s_sec_mux", s);
++	if (!p_names[2]) {
++		clk = ERR_PTR(-ENOMEM);
++		goto err_p2;
++	}
++
++	clk = devm_clk_register(dev, &mux->hw);
++
++	kfree(p_names[2]);
++err_p2:
++	kfree(p_names[1]);
++err_p1:
++	kfree(p_names[0]);
++err_p0:
++	kfree(init.name);
++	return clk;
++}
++
++/* id < 0 for L2, otherwise id == physical CPU number */
++static struct clk *krait_add_clks(struct device *dev, int id, bool unique_aux)
++{
++	int ret;
++	unsigned offset;
++	void *p = NULL;
++	const char *s;
++	struct clk *clk;
++
++	if (id >= 0) {
++		offset = 0x4501 + (0x1000 * id);
++		s = p = kasprintf(GFP_KERNEL, "%d", id);
++		if (!s)
++			return ERR_PTR(-ENOMEM);
++	} else {
++		offset = 0x500;
++		s = "_l2";
++	}
++
++	ret = krait_add_div(dev, id, s, offset);
++	if (ret) {
++		clk = ERR_PTR(ret);
++		goto err;
++	}
++
++	ret = krait_add_sec_mux(dev, id, s, offset, unique_aux);
++	if (ret) {
++		clk = ERR_PTR(ret);
++		goto err;
++	}
++
++	clk = krait_add_pri_mux(dev, id, s, offset);
++err:
++	kfree(p);
++	return clk;
++}
++
++static struct clk *krait_of_get(struct of_phandle_args *clkspec, void *data)
++{
++	unsigned int idx = clkspec->args[0];
++	struct clk **clks = data;
++
++	if (idx >= 5) {
++		pr_err("%s: invalid clock index %d\n", __func__, idx);
++		return ERR_PTR(-EINVAL);
++	}
++
++	return clks[idx] ? : ERR_PTR(-ENODEV);
++}
++
++static const struct of_device_id krait_cc_match_table[] = {
++	{ .compatible = "qcom,krait-cc-v1", (void *)1UL },
++	{ .compatible = "qcom,krait-cc-v2" },
++	{}
++};
++MODULE_DEVICE_TABLE(of, krait_cc_match_table);
++
++static int krait_cc_probe(struct platform_device *pdev)
++{
++	struct device *dev = &pdev->dev;
++	const struct of_device_id *id;
++	unsigned long cur_rate, aux_rate;
++	int cpu;
++	struct clk *clk;
++	struct clk **clks;
++	struct clk *l2_pri_mux_clk;
++
++	id = of_match_device(krait_cc_match_table, dev);
++	if (!id)
++		return -ENODEV;
++
++	/* Rate is 1 because 0 causes problems for __clk_mux_determine_rate */
++	clk = clk_register_fixed_rate(dev, "qsb", NULL, CLK_IS_ROOT, 1);
++	if (IS_ERR(clk))
++		return PTR_ERR(clk);
++
++	if (!id->data) {
++		clk = clk_register_fixed_factor(dev, "acpu_aux",
++						"gpll0_vote", 0, 1, 2);
++		if (IS_ERR(clk))
++			return PTR_ERR(clk);
++	}
++
++	/* Krait configurations have at most 4 CPUs and one L2 */
++	clks = devm_kcalloc(dev, 5, sizeof(*clks), GFP_KERNEL);
++	if (!clks)
++		return -ENOMEM;
++
++	for_each_possible_cpu(cpu) {
++		clk = krait_add_clks(dev, cpu, id->data);
++		if (IS_ERR(clk))
++			return PTR_ERR(clk);
++		clks[cpu] = clk;
++	}
++
++	l2_pri_mux_clk = krait_add_clks(dev, -1, id->data);
++	if (IS_ERR(l2_pri_mux_clk))
++		return PTR_ERR(l2_pri_mux_clk);
++	clks[4] = l2_pri_mux_clk;
++
++	/*
++	 * We don't want the CPU or L2 clocks to be turned off at late init
++	 * if CPUFREQ or HOTPLUG configs are disabled. So, bump up the
++	 * refcount of these clocks. Any cpufreq/hotplug manager can assume
++	 * that the clocks have already been prepared and enabled by the time
++	 * they take over.
++	 */
++	for_each_online_cpu(cpu) {
++		clk_prepare_enable(l2_pri_mux_clk);
++		WARN(clk_prepare_enable(clks[cpu]),
++			"Unable to turn on CPU%d clock", cpu);
++	}
++
++	/*
++	 * Force reinit of HFPLLs and muxes to overwrite any potential
++	 * incorrect configuration of HFPLLs and muxes by the bootloader.
++	 * While at it, also make sure the cores are running at known rates
++	 * and print the current rate.
++	 *
++	 * The clocks are set to aux clock rate first to make sure the
++	 * secondary mux is not sourcing off of QSB. The rate is then set to
++	 * two different rates to force a HFPLL reinit under all
++	 * circumstances.
++	 */
++	cur_rate = clk_get_rate(l2_pri_mux_clk);
++	aux_rate = 384000000;
++	if (cur_rate == 1) {
++		pr_info("L2 @ QSB rate. Forcing new rate.\n");
++		cur_rate = aux_rate;
++	}
++	clk_set_rate(l2_pri_mux_clk, aux_rate);
++	clk_set_rate(l2_pri_mux_clk, 2);
++	clk_set_rate(l2_pri_mux_clk, cur_rate);
++	pr_info("L2 @ %lu KHz\n", clk_get_rate(l2_pri_mux_clk) / 1000);
++	for_each_possible_cpu(cpu) {
++		clk = clks[cpu];
++		cur_rate = clk_get_rate(clk);
++		if (cur_rate == 1) {
++			pr_info("CPU%d @ QSB rate. Forcing new rate.\n", cpu);
++			cur_rate = aux_rate;
++		}
++		clk_set_rate(clk, aux_rate);
++		clk_set_rate(clk, 2);
++		clk_set_rate(clk, cur_rate);
++		pr_info("CPU%d @ %lu KHz\n", cpu, clk_get_rate(clk) / 1000);
++	}
++
++	of_clk_add_provider(dev->of_node, krait_of_get, clks);
++
++	return 0;
++}
++
++static struct platform_driver krait_cc_driver = {
++	.probe = krait_cc_probe,
++	.driver = {
++		.name = "krait-cc",
++		.of_match_table = krait_cc_match_table,
++	},
++};
++module_platform_driver(krait_cc_driver);
++
++MODULE_DESCRIPTION("Krait CPU Clock Driver");
++MODULE_LICENSE("GPL v2");
++MODULE_ALIAS("platform:krait-cc");

target/linux/ipq806x/patches-4.0/143-cpufreq-Add-module-to-register-cpufreq-on-Krait-CPUs.patch

@@ -0,0 +1,304 @@
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v3,12/13] cpufreq: Add module to register cpufreq on Krait CPUs
+From: Stephen Boyd <[email protected]>
+X-Patchwork-Id: 6063191
+Message-Id: <[email protected]>
+To: Mike Turquette <[email protected]>, Stephen Boyd <[email protected]>
+Cc: [email protected], [email protected],
+	[email protected], [email protected],
+	Viresh Kumar <[email protected]>, <[email protected]>
+Date: Fri, 20 Mar 2015 23:45:31 -0700
+
+Register a cpufreq-generic device whenever we detect that a
+"qcom,krait" compatible CPU is present in DT.
+
+Cc: <[email protected]>
+Signed-off-by: Stephen Boyd <[email protected]>
+
+---
+.../devicetree/bindings/arm/msm/qcom,pvs.txt       |  38 ++++
+ drivers/cpufreq/Kconfig.arm                        |   9 +
+ drivers/cpufreq/Makefile                           |   1 +
+ drivers/cpufreq/qcom-cpufreq.c                     | 204 +++++++++++++++++++++
+ 4 files changed, 252 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/arm/msm/qcom,pvs.txt
+ create mode 100644 drivers/cpufreq/qcom-cpufreq.c
+
+--- /dev/null
++++ b/Documentation/devicetree/bindings/arm/msm/qcom,pvs.txt
+@@ -0,0 +1,38 @@
++Qualcomm Process Voltage Scaling Tables
++
++The node name is required to be "qcom,pvs". There shall only be one
++such node present in the root of the tree.
++
++PROPERTIES
++
++- qcom,pvs-format-a or qcom,pvs-format-b:
++	Usage: required
++	Value type: <empty>
++	Definition: Indicates the format of qcom,speedX-pvsY-bin-vZ properties.
++		    If qcom,pvs-format-a is used the table is two columns
++		    (frequency and voltage in that order). If qcom,pvs-format-b 		    is used the table is three columns (frequency, voltage,
++		    and current in that order).
++
++- qcom,speedX-pvsY-bin-vZ:
++	Usage: required
++	Value type: <prop-encoded-array>
++	Definition: The PVS table corresponding to the speed bin X, pvs bin Y,
++		    and version Z.
++Example:
++
++	qcom,pvs {
++		qcom,pvs-format-a;
++		qcom,speed0-pvs0-bin-v0 =
++			<  384000000  950000 >,
++			<  486000000  975000 >,
++			<  594000000 1000000 >,
++			<  702000000 1025000 >,
++			<  810000000 1075000 >,
++			<  918000000 1100000 >,
++			< 1026000000 1125000 >,
++			< 1134000000 1175000 >,
++			< 1242000000 1200000 >,
++			< 1350000000 1225000 >,
++			< 1458000000 1237500 >,
++			< 1512000000 1250000 >;
++	};
+--- a/drivers/cpufreq/Kconfig.arm
++++ b/drivers/cpufreq/Kconfig.arm
+@@ -137,6 +137,15 @@ config ARM_OMAP2PLUS_CPUFREQ
+ 	depends on ARCH_OMAP2PLUS
+ 	default ARCH_OMAP2PLUS
+ 
++config ARM_QCOM_CPUFREQ
++	tristate "Qualcomm based"
++	depends on ARCH_QCOM
++	select PM_OPP
++	help
++	  This adds the CPUFreq driver for Qualcomm SoC based boards.
++
++	  If in doubt, say N.
++
+ config ARM_S3C_CPUFREQ
+ 	bool
+ 	help
+--- a/drivers/cpufreq/Makefile
++++ b/drivers/cpufreq/Makefile
+@@ -65,6 +65,7 @@ obj-$(CONFIG_ARM_KIRKWOOD_CPUFREQ)	+= ki
+ obj-$(CONFIG_ARM_OMAP2PLUS_CPUFREQ)	+= omap-cpufreq.o
+ obj-$(CONFIG_ARM_PXA2xx_CPUFREQ)	+= pxa2xx-cpufreq.o
+ obj-$(CONFIG_PXA3xx)			+= pxa3xx-cpufreq.o
++obj-$(CONFIG_ARM_QCOM_CPUFREQ)		+= qcom-cpufreq.o
+ obj-$(CONFIG_ARM_S3C24XX_CPUFREQ)	+= s3c24xx-cpufreq.o
+ obj-$(CONFIG_ARM_S3C24XX_CPUFREQ_DEBUGFS) += s3c24xx-cpufreq-debugfs.o
+ obj-$(CONFIG_ARM_S3C2410_CPUFREQ)	+= s3c2410-cpufreq.o
+--- /dev/null
++++ b/drivers/cpufreq/qcom-cpufreq.c
+@@ -0,0 +1,204 @@
++/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 and
++ * only version 2 as published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ */
++
++#include <linux/cpu.h>
++#include <linux/err.h>
++#include <linux/init.h>
++#include <linux/io.h>
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/of.h>
++#include <linux/platform_device.h>
++#include <linux/pm_opp.h>
++#include <linux/slab.h>
++#include <linux/cpufreq-dt.h>
++
++static void __init get_krait_bin_format_a(int *speed, int *pvs, int *pvs_ver)
++{
++	void __iomem *base;
++	u32 pte_efuse;
++
++	*speed = *pvs = *pvs_ver = 0;
++
++	base = ioremap(0x007000c0, 4);
++	if (!base) {
++		pr_warn("Unable to read efuse data. Defaulting to 0!\n");
++		return;
++	}
++
++	pte_efuse = readl_relaxed(base);
++	iounmap(base);
++
++	*speed = pte_efuse & 0xf;
++	if (*speed == 0xf)
++		*speed = (pte_efuse >> 4) & 0xf;
++
++	if (*speed == 0xf) {
++		*speed = 0;
++		pr_warn("Speed bin: Defaulting to %d\n", *speed);
++	} else {
++		pr_info("Speed bin: %d\n", *speed);
++	}
++
++	*pvs = (pte_efuse >> 10) & 0x7;
++	if (*pvs == 0x7)
++		*pvs = (pte_efuse >> 13) & 0x7;
++
++	if (*pvs == 0x7) {
++		*pvs = 0;
++		pr_warn("PVS bin: Defaulting to %d\n", *pvs);
++	} else {
++		pr_info("PVS bin: %d\n", *pvs);
++	}
++}
++
++static void __init get_krait_bin_format_b(int *speed, int *pvs, int *pvs_ver)
++{
++	u32 pte_efuse, redundant_sel;
++	void __iomem *base;
++
++	*speed = 0;
++	*pvs = 0;
++	*pvs_ver = 0;
++
++	base = ioremap(0xfc4b80b0, 8);
++	if (!base) {
++		pr_warn("Unable to read efuse data. Defaulting to 0!\n");
++		return;
++	}
++
++	pte_efuse = readl_relaxed(base);
++	redundant_sel = (pte_efuse >> 24) & 0x7;
++	*speed = pte_efuse & 0x7;
++	/* 4 bits of PVS are in efuse register bits 31, 8-6. */
++	*pvs = ((pte_efuse >> 28) & 0x8) | ((pte_efuse >> 6) & 0x7);
++	*pvs_ver = (pte_efuse >> 4) & 0x3;
++
++	switch (redundant_sel) {
++	case 1:
++		*speed = (pte_efuse >> 27) & 0xf;
++		break;
++	case 2:
++		*pvs = (pte_efuse >> 27) & 0xf;
++		break;
++	}
++
++	/* Check SPEED_BIN_BLOW_STATUS */
++	if (pte_efuse & BIT(3)) {
++		pr_info("Speed bin: %d\n", *speed);
++	} else {
++		pr_warn("Speed bin not set. Defaulting to 0!\n");
++		*speed = 0;
++	}
++
++	/* Check PVS_BLOW_STATUS */
++	pte_efuse = readl_relaxed(base + 0x4) & BIT(21);
++	if (pte_efuse) {
++		pr_info("PVS bin: %d\n", *pvs);
++	} else {
++		pr_warn("PVS bin not set. Defaulting to 0!\n");
++		*pvs = 0;
++	}
++
++	pr_info("PVS version: %d\n", *pvs_ver);
++	iounmap(base);
++}
++
++static int __init qcom_cpufreq_populate_opps(void)
++{
++	int len, rows, cols, i, k, speed, pvs, pvs_ver;
++	char table_name[] = "qcom,speedXX-pvsXX-bin-vXX";
++	struct device_node *np;
++	struct device *dev;
++	int cpu = 0;
++
++	np = of_find_node_by_name(NULL, "qcom,pvs");
++	if (!np)
++		return -ENODEV;
++
++	if (of_property_read_bool(np, "qcom,pvs-format-a")) {
++		get_krait_bin_format_a(&speed, &pvs, &pvs_ver);
++		cols = 2;
++	} else if (of_property_read_bool(np, "qcom,pvs-format-b")) {
++		get_krait_bin_format_b(&speed, &pvs, &pvs_ver);
++		cols = 3;
++	} else {
++		return -ENODEV;
++	}
++
++	snprintf(table_name, sizeof(table_name),
++			"qcom,speed%d-pvs%d-bin-v%d", speed, pvs, pvs_ver);
++
++	if (!of_find_property(np, table_name, &len))
++		return -EINVAL;
++
++	len /= sizeof(u32);
++	if (len % cols || len == 0)
++		return -EINVAL;
++
++	rows = len / cols;
++
++	for (i = 0, k = 0; i < rows; i++) {
++		u32 freq, volt;
++
++		of_property_read_u32_index(np, table_name, k++, &freq);
++		of_property_read_u32_index(np, table_name, k++, &volt);
++		while (k % cols)
++			k++; /* Skip uA entries if present */
++		for (cpu = 0; cpu < num_possible_cpus(); cpu++) {
++			dev = get_cpu_device(cpu);
++			if (!dev)
++				return -ENODEV;
++			if (dev_pm_opp_add(dev, freq, volt))
++				pr_warn("failed to add OPP %u\n", freq);
++		}
++	}
++
++	return 0;
++}
++
++static int __init qcom_cpufreq_driver_init(void)
++{
++	struct cpufreq_dt_platform_data pdata = { .independent_clocks = true };
++	struct platform_device_info devinfo = {
++		.name = "cpufreq-dt",
++		.data = &pdata,
++		.size_data = sizeof(pdata),
++	};
++	struct device *cpu_dev;
++	struct device_node *np;
++	int ret;
++
++	cpu_dev = get_cpu_device(0);
++	if (!cpu_dev)
++		return -ENODEV;
++
++	np = of_node_get(cpu_dev->of_node);
++	if (!np)
++		return -ENOENT;
++
++	if (!of_device_is_compatible(np, "qcom,krait")) {
++		of_node_put(np);
++		return -ENODEV;
++	}
++	of_node_put(np);
++
++	ret = qcom_cpufreq_populate_opps();
++	if (ret)
++		return ret;
++
++	return PTR_ERR_OR_ZERO(platform_device_register_full(&devinfo));
++}
++module_init(qcom_cpufreq_driver_init);
++
++MODULE_DESCRIPTION("Qualcomm CPUfreq driver");
++MODULE_LICENSE("GPL v2");

target/linux/ipq806x/patches-4.0/144-ARM-dts-qcom-Add-necessary-DT-data-for-Krait-cpufreq.patch

@@ -0,0 +1,100 @@
+--- a/arch/arm/boot/dts/qcom-ipq8064.dtsi
++++ b/arch/arm/boot/dts/qcom-ipq8064.dtsi
+@@ -23,6 +23,11 @@
+ 			next-level-cache = <&L2>;
+ 			qcom,acc = <&acc0>;
+ 			qcom,saw = <&saw0>;
++			clocks = <&kraitcc 0>;
++			clock-names = "cpu";
++			clock-latency = <100000>;
++			core-supply = <&smb208_s2a>;
++			voltage-tolerance = <5>;
+ 		};
+ 
+ 		cpu@1 {
+@@ -33,11 +38,24 @@
+ 			next-level-cache = <&L2>;
+ 			qcom,acc = <&acc1>;
+ 			qcom,saw = <&saw1>;
++			clocks = <&kraitcc 1>;
++			clock-names = "cpu";
++			clock-latency = <100000>;
++			core-supply = <&smb208_s2b>;
+ 		};
+ 
+ 		L2: l2-cache {
+ 			compatible = "cache";
+ 			cache-level = <2>;
++			clocks = <&kraitcc 4>;
++			clock-names = "cache";
++			cache-points-kHz = <
++				/* kHz    uV    CPU kHz */
++				1200000 1150000 1200000
++				1000000 1100000  600000
++				 384000 1100000  384000
++			>;
++			vdd_dig-supply = <&smb208_s1a>;
+ 		};
+ 	};
+ 
+@@ -70,6 +88,46 @@
+ 		};
+ 	};
+ 
++	kraitcc: clock-controller {
++		compatible = "qcom,krait-cc-v1";
++		#clock-cells = <1>;
++	};
++
++	qcom,pvs {
++		qcom,pvs-format-a;
++		qcom,speed0-pvs0-bin-v0 =
++			< 1400000000 1250000 >,
++			< 1200000000 1200000 >,
++			< 1000000000 1150000 >,
++			 < 800000000 1100000 >,
++			 < 600000000 1050000 >,
++			 < 384000000 1000000 >;
++
++		qcom,speed0-pvs1-bin-v0 =
++			< 1400000000 1175000 >,
++			< 1200000000 1125000 >,
++			< 1000000000 1075000 >,
++			 < 800000000 1025000 >,
++			 < 600000000  975000 >,
++			 < 384000000  925000 >;
++
++		qcom,speed0-pvs2-bin-v0 =
++			< 1400000000 1125000 >,
++			< 1200000000 1075000 >,
++			< 1000000000 1025000 >,
++			 < 800000000  995000 >,
++			 < 600000000  925000 >,
++			 < 384000000  875000 >;
++
++		qcom,speed0-pvs3-bin-v0 =
++			< 1400000000 1050000 >,
++			< 1200000000 1000000 >,
++			< 1000000000  950000 >,
++			 < 800000000  900000 >,
++			 < 600000000  850000 >,
++			 < 384000000  800000 >;
++	};
++
+ 	soc: soc {
+ 		#address-cells = <1>;
+ 		#size-cells = <1>;
+@@ -170,11 +228,13 @@
+ 		acc0: clock-controller@2088000 {
+ 			compatible = "qcom,kpss-acc-v1";
+ 			reg = <0x02088000 0x1000>, <0x02008000 0x1000>;
++			clock-output-names = "acpu0_aux";
+ 		};
+ 
+ 		acc1: clock-controller@2098000 {
+ 			compatible = "qcom,kpss-acc-v1";
+ 			reg = <0x02098000 0x1000>, <0x02008000 0x1000>;
++			clock-output-names = "acpu1_aux";
+ 		};
+ 
+ 		l2cc: clock-controller@2011000 {

target/linux/ipq806x/patches-4.0/145-cpufreq-Add-a-cpufreq-krait-based-on-cpufre.patch

@@ -0,0 +1,461 @@
+From dd77db4143290689d3a5e1ec61627233d0711b66 Mon Sep 17 00:00:00 2001
+From: Stephen Boyd <[email protected]>
+Date: Fri, 30 May 2014 16:36:11 -0700
+Subject: [PATCH] FROMLIST: cpufreq: Add a cpufreq-krait based on cpufreq-cpu0
+
+Krait processors have individual clocks for each CPU that can
+scale independently from one another. cpufreq-cpu0 is fairly
+close to this, but assumes that there is only one clock for all
+CPUs. Add a driver to support the Krait configuration.
+
+TODO: Merge into cpufreq-cpu0? Or make generic?
+
+Signed-off-by: Stephen Boyd <[email protected]>
+
+---
+ drivers/cpufreq/Kconfig         |  13 +++
+ drivers/cpufreq/Makefile        |   1 +
+ drivers/cpufreq/cpufreq-krait.c | 190 ++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 204 insertions(+)
+ create mode 100644 drivers/cpufreq/cpufreq-krait.c
+
+--- a/drivers/cpufreq/Kconfig
++++ b/drivers/cpufreq/Kconfig
+@@ -198,6 +198,19 @@ config CPUFREQ_DT
+ 
+ 	  If in doubt, say N.
+ 
++config GENERIC_CPUFREQ_KRAIT
++	tristate "Krait cpufreq driver"
++	depends on HAVE_CLK && OF
++	# if CPU_THERMAL is on and THERMAL=m, CPU0 cannot be =y:
++	depends on !CPU_THERMAL || THERMAL
++	select PM_OPP
++	help
++	  This adds a generic cpufreq driver for CPU0 frequency management.
++	  It supports both uniprocessor (UP) and symmetric multiprocessor (SMP)
++	  systems which share clock and voltage across all CPUs.
++
++	  If in doubt, say N.
++
+ if X86
+ source "drivers/cpufreq/Kconfig.x86"
+ endif
+--- a/drivers/cpufreq/Makefile
++++ b/drivers/cpufreq/Makefile
+@@ -14,6 +14,7 @@ obj-$(CONFIG_CPU_FREQ_GOV_CONSERVATIVE)
+ obj-$(CONFIG_CPU_FREQ_GOV_COMMON)		+= cpufreq_governor.o
+ 
+ obj-$(CONFIG_CPUFREQ_DT)		+= cpufreq-dt.o
++obj-$(CONFIG_GENERIC_CPUFREQ_KRAIT)	+= cpufreq-krait.o
+ 
+ ##################################################################################
+ # x86 drivers.
+--- /dev/null
++++ b/drivers/cpufreq/cpufreq-krait.c
+@@ -0,0 +1,390 @@
++/*
++ * Copyright (C) 2012 Freescale Semiconductor, Inc.
++ * Copyright (c) 2014, The Linux Foundation. All rights reserved.
++ *
++ * The OPP code in function krait_set_target() is reused from
++ * drivers/cpufreq/omap-cpufreq.c
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++#include <linux/clk.h>
++#include <linux/cpu.h>
++#include <linux/cpu_cooling.h>
++#include <linux/cpufreq.h>
++#include <linux/cpumask.h>
++#include <linux/err.h>
++#include <linux/module.h>
++#include <linux/of.h>
++#include <linux/pm_opp.h>
++#include <linux/platform_device.h>
++#include <linux/regulator/consumer.h>
++#include <linux/slab.h>
++#include <linux/thermal.h>
++
++static unsigned int transition_latency;
++static unsigned int voltage_tolerance; /* in percentage */
++
++static struct device *cpu_dev;
++static DEFINE_PER_CPU(struct clk *, krait_cpu_clks);
++static DEFINE_PER_CPU(struct regulator *, krait_supply_core);
++static struct cpufreq_frequency_table *freq_table;
++static struct thermal_cooling_device *cdev;
++
++struct cache_points {
++	unsigned long cache_freq;
++	unsigned int cache_volt;
++	unsigned long cpu_freq;
++};
++
++static struct regulator *krait_l2_reg;
++static struct clk *krait_l2_clk;
++static struct cache_points *krait_l2_points;
++static int nr_krait_l2_points;
++
++static int krait_parse_cache_points(struct device *dev,
++		struct device_node *of_node)
++{
++	const struct property *prop;
++	const __be32 *val;
++	int nr, i;
++
++	prop = of_find_property(of_node, "cache-points-kHz", NULL);
++	if (!prop)
++		return -ENODEV;
++	if (!prop->value)
++		return -ENODATA;
++
++	/*
++	 * Each OPP is a set of tuples consisting of frequency and
++	 * cpu-frequency like <freq-kHz volt-uV freq-kHz>.
++	 */
++	nr = prop->length / sizeof(u32);
++	if (nr % 3) {
++		dev_err(dev, "%s: Invalid cache points\n", __func__);
++		return -EINVAL;
++	}
++	nr /= 3;
++
++	krait_l2_points = devm_kcalloc(dev, nr, sizeof(*krait_l2_points),
++				       GFP_KERNEL);
++	if (!krait_l2_points)
++		return -ENOMEM;
++	nr_krait_l2_points = nr;
++
++	for (i = 0, val = prop->value; i < nr; i++) {
++		unsigned long cache_freq = be32_to_cpup(val++) * 1000;
++		unsigned int cache_volt = be32_to_cpup(val++);
++		unsigned long cpu_freq = be32_to_cpup(val++) * 1000;
++
++		krait_l2_points[i].cache_freq = cache_freq;
++		krait_l2_points[i].cache_volt = cache_volt;
++		krait_l2_points[i].cpu_freq = cpu_freq;
++	}
++
++	return 0;
++}
++
++static int krait_set_target(struct cpufreq_policy *policy, unsigned int index)
++{
++	struct dev_pm_opp *opp;
++	unsigned long volt = 0, volt_old = 0, tol = 0;
++	unsigned long freq, max_cpu_freq = 0;
++	unsigned int old_freq, new_freq;
++	long freq_Hz, freq_exact;
++	int ret, i;
++	struct clk *cpu_clk;
++	struct regulator *core;
++	unsigned int cpu;
++
++	cpu_clk = per_cpu(krait_cpu_clks, policy->cpu);
++
++	freq_Hz = clk_round_rate(cpu_clk, freq_table[index].frequency * 1000);
++	if (freq_Hz <= 0)
++		freq_Hz = freq_table[index].frequency * 1000;
++
++	freq_exact = freq_Hz;
++	new_freq = freq_Hz / 1000;
++	old_freq = clk_get_rate(cpu_clk) / 1000;
++
++	core = per_cpu(krait_supply_core, policy->cpu);
++
++	rcu_read_lock();
++	opp = dev_pm_opp_find_freq_ceil(cpu_dev, &freq_Hz);
++	if (IS_ERR(opp)) {
++		rcu_read_unlock();
++		pr_err("failed to find OPP for %ld\n", freq_Hz);
++		return PTR_ERR(opp);
++	}
++	volt = dev_pm_opp_get_voltage(opp);
++	rcu_read_unlock();
++	tol = volt * voltage_tolerance / 100;
++	volt_old = regulator_get_voltage(core);
++
++	pr_debug("%u MHz, %ld mV --> %u MHz, %ld mV\n",
++		 old_freq / 1000, volt_old ? volt_old / 1000 : -1,
++		 new_freq / 1000, volt ? volt / 1000 : -1);
++
++	/* scaling up?  scale voltage before frequency */
++	if (new_freq > old_freq) {
++		ret = regulator_set_voltage_tol(core, volt, tol);
++		if (ret) {
++			pr_err("failed to scale voltage up: %d\n", ret);
++			return ret;
++		}
++	}
++
++	ret = clk_set_rate(cpu_clk, freq_exact);
++	if (ret) {
++		pr_err("failed to set clock rate: %d\n", ret);
++		return ret;
++	}
++
++	/* scaling down?  scale voltage after frequency */
++	if (new_freq < old_freq) {
++		ret = regulator_set_voltage_tol(core, volt, tol);
++		if (ret) {
++			pr_err("failed to scale voltage down: %d\n", ret);
++			clk_set_rate(cpu_clk, old_freq * 1000);
++		}
++	}
++
++	for_each_possible_cpu(cpu) {
++		freq = clk_get_rate(per_cpu(krait_cpu_clks, cpu));
++		max_cpu_freq = max(max_cpu_freq, freq);
++	}
++
++	for (i = 0; i < nr_krait_l2_points; i++) {
++		if (max_cpu_freq >= krait_l2_points[i].cpu_freq) {
++			if (krait_l2_reg) {
++				ret = regulator_set_voltage_tol(krait_l2_reg,
++						krait_l2_points[i].cache_volt,
++						tol);
++				if (ret) {
++					pr_err("failed to scale l2 voltage: %d\n",
++						ret);
++				}
++			}
++			ret = clk_set_rate(krait_l2_clk,
++					krait_l2_points[i].cache_freq);
++			if (ret)
++				pr_err("failed to scale l2 clk: %d\n", ret);
++			break;
++		}
++
++	}
++
++	return ret;
++}
++
++static int krait_cpufreq_init(struct cpufreq_policy *policy)
++{
++	int ret;
++
++	policy->clk = per_cpu(krait_cpu_clks, policy->cpu);
++
++	ret = cpufreq_table_validate_and_show(policy, freq_table);
++	if (ret) {
++		pr_err("%s: invalid frequency table: %d\n", __func__, ret);
++		return ret;
++	}
++
++	policy->cpuinfo.transition_latency = transition_latency;
++
++	return 0;
++}
++
++static struct cpufreq_driver krait_cpufreq_driver = {
++	.flags = CPUFREQ_STICKY,
++	.verify = cpufreq_generic_frequency_table_verify,
++	.target_index = krait_set_target,
++	.get = cpufreq_generic_get,
++	.init = krait_cpufreq_init,
++	.name = "generic_krait",
++	.attr = cpufreq_generic_attr,
++};
++
++static int krait_cpufreq_probe(struct platform_device *pdev)
++{
++	struct device_node *np, *cache;
++	int ret, i;
++	unsigned int cpu;
++	struct device *dev;
++	struct clk *clk;
++	struct regulator *core;
++	unsigned long freq_Hz, freq, max_cpu_freq;
++	struct dev_pm_opp *opp;
++	unsigned long volt, tol;
++
++	cpu_dev = get_cpu_device(0);
++	if (!cpu_dev) {
++		pr_err("failed to get krait device\n");
++		return -ENODEV;
++	}
++
++	np = of_node_get(cpu_dev->of_node);
++	if (!np) {
++		pr_err("failed to find krait node\n");
++		return -ENOENT;
++	}
++
++	ret = dev_pm_opp_init_cpufreq_table(cpu_dev, &freq_table);
++	if (ret) {
++		pr_err("failed to init cpufreq table: %d\n", ret);
++		goto out_put_node;
++	}
++
++	of_property_read_u32(np, "voltage-tolerance", &voltage_tolerance);
++
++	if (of_property_read_u32(np, "clock-latency", &transition_latency))
++		transition_latency = CPUFREQ_ETERNAL;
++
++	cache = of_find_next_cache_node(np);
++	if (cache) {
++		struct device_node *vdd;
++
++		vdd = of_parse_phandle(cache, "vdd_dig-supply", 0);
++		if (vdd) {
++			krait_l2_reg = regulator_get(NULL, vdd->name);
++			if (IS_ERR(krait_l2_reg)) {
++				pr_warn("failed to get l2 vdd_dig supply\n");
++				krait_l2_reg = NULL;
++			}
++			of_node_put(vdd);
++		}
++
++		krait_l2_clk = of_clk_get(cache, 0);
++		if (!IS_ERR(krait_l2_clk)) {
++			ret = krait_parse_cache_points(&pdev->dev, cache);
++			if (ret)
++				clk_put(krait_l2_clk);
++		}
++		if (IS_ERR(krait_l2_clk) || ret)
++			krait_l2_clk = NULL;
++	}
++
++	for_each_possible_cpu(cpu) {
++		dev = get_cpu_device(cpu);
++		if (!dev) {
++			pr_err("failed to get krait device\n");
++			ret = -ENOENT;
++			goto out_free_table;
++		}
++		per_cpu(krait_cpu_clks, cpu) = clk = devm_clk_get(dev, NULL);
++		if (IS_ERR(clk)) {
++			ret = PTR_ERR(clk);
++			goto out_free_table;
++		}
++		core = devm_regulator_get(dev, "core");
++		if (IS_ERR(core)) {
++			pr_debug("failed to get core regulator\n");
++			ret = PTR_ERR(core);
++			goto out_free_table;
++		}
++		per_cpu(krait_supply_core, cpu) = core;
++
++		freq_Hz = clk_get_rate(clk);
++
++		rcu_read_lock();
++		opp = dev_pm_opp_find_freq_ceil(cpu_dev, &freq_Hz);
++		if (IS_ERR(opp)) {
++			rcu_read_unlock();
++			pr_err("failed to find OPP for %ld\n", freq_Hz);
++			ret = PTR_ERR(opp);
++			goto out_free_table;
++		}
++		volt = dev_pm_opp_get_voltage(opp);
++		rcu_read_unlock();
++
++		tol = volt * voltage_tolerance / 100;
++		ret = regulator_set_voltage_tol(core, volt, tol);
++		if (ret) {
++			pr_err("failed to scale voltage up: %d\n", ret);
++			goto out_free_table;
++		}
++		ret = regulator_enable(core);
++		if (ret) {
++			pr_err("failed to enable regulator: %d\n", ret);
++			goto out_free_table;
++		}
++		max_cpu_freq = max(max_cpu_freq, freq);
++	}
++
++	for (i = 0; i < nr_krait_l2_points; i++) {
++		if (max_cpu_freq >= krait_l2_points[i].cpu_freq) {
++			if (krait_l2_reg) {
++				ret = regulator_set_voltage_tol(krait_l2_reg,
++						krait_l2_points[i].cache_volt,
++						tol);
++				if (ret)
++					pr_err("failed to scale l2 voltage: %d\n",
++							ret);
++				ret = regulator_enable(krait_l2_reg);
++				if (ret)
++					pr_err("failed to enable l2 voltage: %d\n",
++							ret);
++			}
++			break;
++		}
++
++	}
++
++	ret = cpufreq_register_driver(&krait_cpufreq_driver);
++	if (ret) {
++		pr_err("failed register driver: %d\n", ret);
++		goto out_free_table;
++	}
++	of_node_put(np);
++
++	/*
++	 * For now, just loading the cooling device;
++	 * thermal DT code takes care of matching them.
++	 */
++	for_each_possible_cpu(cpu) {
++		dev = get_cpu_device(cpu);
++		np = of_node_get(dev->of_node);
++		if (of_find_property(np, "#cooling-cells", NULL)) {
++			cdev = of_cpufreq_cooling_register(np, cpumask_of(cpu));
++			if (IS_ERR(cdev))
++				pr_err("running cpufreq without cooling device: %ld\n",
++				       PTR_ERR(cdev));
++		}
++		of_node_put(np);
++	}
++
++	return 0;
++
++out_free_table:
++	regulator_put(krait_l2_reg);
++	clk_put(krait_l2_clk);
++	dev_pm_opp_free_cpufreq_table(cpu_dev, &freq_table);
++out_put_node:
++	of_node_put(np);
++	return ret;
++}
++
++static int krait_cpufreq_remove(struct platform_device *pdev)
++{
++	cpufreq_cooling_unregister(cdev);
++	cpufreq_unregister_driver(&krait_cpufreq_driver);
++	dev_pm_opp_free_cpufreq_table(cpu_dev, &freq_table);
++	clk_put(krait_l2_clk);
++	regulator_put(krait_l2_reg);
++
++	return 0;
++}
++
++static struct platform_driver krait_cpufreq_platdrv = {
++	.driver = {
++		.name	= "cpufreq-krait",
++		.owner	= THIS_MODULE,
++	},
++	.probe		= krait_cpufreq_probe,
++	.remove		= krait_cpufreq_remove,
++};
++module_platform_driver(krait_cpufreq_platdrv);
++
++MODULE_DESCRIPTION("Krait CPUfreq driver");
++MODULE_LICENSE("GPL v2");
+--- a/drivers/cpufreq/qcom-cpufreq.c
++++ b/drivers/cpufreq/qcom-cpufreq.c
+@@ -168,11 +168,8 @@ static int __init qcom_cpufreq_populate_
+ 
+ static int __init qcom_cpufreq_driver_init(void)
+ {
+-	struct cpufreq_dt_platform_data pdata = { .independent_clocks = true };
+ 	struct platform_device_info devinfo = {
+-		.name = "cpufreq-dt",
+-		.data = &pdata,
+-		.size_data = sizeof(pdata),
++		.name = "cpufreq-krait",
+ 	};
+ 	struct device *cpu_dev;
+ 	struct device_node *np;

target/linux/ipq806x/patches-4.0/700-add-gmac-dts-suport.patch

@@ -127,7 +127,7 @@
  
  / {
  	model = "Qualcomm IPQ8064";
-@@ -479,5 +480,42 @@
+@@ -539,5 +540,42 @@
  
  			status = "disabled";
  		};