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- From c7107291df4035794c67d7a904fe7419fedc5922 Mon Sep 17 00:00:00 2001
- From: John Crispin <[email protected]>
- Date: Mon, 22 Apr 2013 23:11:42 +0200
- Subject: [PATCH 45/79] MIPS: ralink: add pinmux driver
- Add code to setup the pinmux on ralonk SoC. The SoC has a single 32 bit register
- for this functionality with simple on/off bits. Building a full featured pinctrl
- driver would be overkill.
- Signed-off-by: John Crispin <[email protected]>
- ---
- arch/mips/ralink/Makefile | 2 +-
- arch/mips/ralink/common.h | 2 ++
- arch/mips/ralink/of.c | 2 ++
- arch/mips/ralink/pinmux.c | 77 +++++++++++++++++++++++++++++++++++++++++++++
- 4 files changed, 82 insertions(+), 1 deletion(-)
- create mode 100644 arch/mips/ralink/pinmux.c
- diff --git a/arch/mips/ralink/Makefile b/arch/mips/ralink/Makefile
- index 38cf1a8..341b4de 100644
- --- a/arch/mips/ralink/Makefile
- +++ b/arch/mips/ralink/Makefile
- @@ -6,7 +6,7 @@
- # Copyright (C) 2009-2011 Gabor Juhos <[email protected]>
- # Copyright (C) 2013 John Crispin <[email protected]>
-
- -obj-y := prom.o of.o reset.o clk.o irq.o
- +obj-y := prom.o of.o reset.o clk.o irq.o pinmux.o
-
- obj-$(CONFIG_SOC_RT288X) += rt288x.o
- obj-$(CONFIG_SOC_RT305X) += rt305x.o
- diff --git a/arch/mips/ralink/common.h b/arch/mips/ralink/common.h
- index 83144c3..f113fd6 100644
- --- a/arch/mips/ralink/common.h
- +++ b/arch/mips/ralink/common.h
- @@ -50,4 +50,6 @@ extern void prom_soc_init(struct ralink_soc_info *soc_info);
-
- __iomem void *plat_of_remap_node(const char *node);
-
- +void ralink_pinmux(void);
- +
- #endif /* _RALINK_COMMON_H__ */
- diff --git a/arch/mips/ralink/of.c b/arch/mips/ralink/of.c
- index fb15695..f916774 100644
- --- a/arch/mips/ralink/of.c
- +++ b/arch/mips/ralink/of.c
- @@ -110,6 +110,8 @@ static int __init plat_of_setup(void)
- if (of_platform_populate(NULL, of_ids, NULL, NULL))
- panic("failed to populate DT\n");
-
- + ralink_pinmux();
- +
- return 0;
- }
-
- diff --git a/arch/mips/ralink/pinmux.c b/arch/mips/ralink/pinmux.c
- new file mode 100644
- index 0000000..1720216
- --- /dev/null
- +++ b/arch/mips/ralink/pinmux.c
- @@ -0,0 +1,77 @@
- +/*
- + * 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.
- + *
- + * Copyright (C) 2013 John Crispin <[email protected]>
- + */
- +
- +#include <linux/kernel.h>
- +#include <linux/of.h>
- +
- +#include <asm/mach-ralink/ralink_regs.h>
- +
- +#include "common.h"
- +
- +#define SYSC_REG_GPIO_MODE 0x60
- +
- +static int ralink_mux_mask(const char *name, struct ralink_pinmux_grp *grps, u32* mask)
- +{
- + for (; grps && grps->name; grps++)
- + if (!strcmp(grps->name, name)) {
- + *mask = grps->mask;
- + return 0;
- + }
- +
- + return -1;
- +}
- +
- +void ralink_pinmux(void)
- +{
- + const __be32 *wdt;
- + struct device_node *np;
- + struct property *prop;
- + const char *uart, *pin;
- + u32 mode = 0;
- + int m;
- +
- + np = of_find_compatible_node(NULL, NULL, "ralink,rt3050-sysc");
- + if (!np)
- + return;
- +
- + of_property_for_each_string(np, "ralink,gpiomux", prop, pin) {
- + if (!ralink_mux_mask(pin, rt_gpio_pinmux.mode, &m)) {
- + mode |= m;
- + pr_debug("pinmux: registered gpiomux \"%s\"\n", pin);
- + } else {
- + pr_err("pinmux: failed to load \"%s\"\n", pin);
- + }
- + }
- +
- + of_property_for_each_string(np, "ralink,pinmux", prop, pin) {
- + if (!ralink_mux_mask(pin, rt_gpio_pinmux.mode, &m)) {
- + mode &= ~m;
- + pr_debug("pinmux: registered pinmux \"%s\"\n", pin);
- + } else {
- + pr_err("pinmux: failed to load group \"%s\"\n", pin);
- + }
- + }
- +
- + of_property_read_string(np, "ralink,uartmux", &uart);
- + if (uart) {
- + mode &= ~(rt_gpio_pinmux.uart_mask << rt_gpio_pinmux.uart_shift);
- + if (ralink_mux_mask(uart, rt_gpio_pinmux.uart, &m)) {
- + pr_err("pinmux: failed to load uartmux \"%s\"\n", uart);
- + mode |= rt_gpio_pinmux.uart_mask << rt_gpio_pinmux.uart_shift;
- + } else {
- + mode |= m << rt_gpio_pinmux.uart_shift;
- + pr_debug("pinmux: registered uartmux \"%s\"\n", uart);
- + }
- + }
- +
- + wdt = of_get_property(np, "ralink,wdtmux", NULL);
- + if (wdt && *wdt && rt_gpio_pinmux.wdt_reset)
- + rt_gpio_pinmux.wdt_reset();
- +
- + rt_sysc_w32(mode, SYSC_REG_GPIO_MODE);
- +}
- --
- 1.7.10.4
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