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@@ -0,0 +1,502 @@
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+From: Ed Wildgoose <[email protected]>
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+Date: Wed, 3 Aug 2011 00:52:36 +0000 (+1000)
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+Subject: This new driver replaces the old PCEngines Alix 2/3 LED driver with a new
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+X-Git-Tag: next-20110812~1^2~75
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+X-Git-Url: http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Fnext%2Flinux-next.git;a=commitdiff_plain;h=2cd7b3e8f8078c214c93a2c60cb845500c92df4a;hp=dc849eae35bbf651ab3ee459f5683e1ff780413d
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+
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+This new driver replaces the old PCEngines Alix 2/3 LED driver with a new
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+driver that controls the LEDs through the leds-gpio driver. The old
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+driver accessed GPIOs directly, which created a conflict and prevented
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+also loading the cs5535-gpio driver to read other GPIOs on the Alix board.
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+ With this new driver, we hook into leds-gpio which in turn uses GPIO to
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+control the LEDs and therefore it's possible to control both the LEDs and
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+access onboard GPIOs
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+
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+Driver is moved to platform/geode and any other geode initialisation
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+modules should move here also.
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+
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+This driver is inspired by leds-net5501.c by Alessandro Zummo.
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+
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+Ideally, leds-net5501.c should also be moved to platform/geode.
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+Additionally the driver relies on parts of the patch: 7f131cf3ed ("leds:
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+leds-alix2c - take port address from MSR) by Daniel Mack to perform
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+detection of the Alix board.
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+
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+Signed-off-by: Ed Wildgoose <[email protected]>
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+Cc: Alessandro Zummo <[email protected]>
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+Cc: Daniel Mack <[email protected]>
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+Reviewed-by: Grant Likely <[email protected]>
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+Cc: Ingo Molnar <[email protected]>
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+Cc: Thomas Gleixner <[email protected]>
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+Cc: "H. Peter Anvin" <[email protected]>
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+Cc: Richard Purdie <[email protected]>
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+Signed-off-by: Andrew Morton <[email protected]>
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+---
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+
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+diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
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+index f1833e3..d18e7a2 100644
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+--- a/arch/x86/Kconfig
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++++ b/arch/x86/Kconfig
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+@@ -2073,6 +2073,20 @@ config OLPC_XO15_SCI
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+ - AC adapter status updates
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+ - Battery status updates
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+
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++config ALIX
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++ bool "PCEngines ALIX System Support (LED setup)"
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++ select GPIOLIB
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++ ---help---
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++ This option enables system support for the PCEngines ALIX.
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++ At present this just sets up LEDs for GPIO control on
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++ ALIX2/3/6 boards. However, other system specific setup should
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++ get added here.
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++
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++ Note: You must still enable the drivers for GPIO and LED support
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++ (GPIO_CS5535 & LEDS_GPIO) to actually use the LEDs
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++
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++ Note: You have to set alix.force=1 for boards with Award BIOS.
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++
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+ endif # X86_32
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+
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+ config AMD_NB
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+diff --git a/arch/x86/platform/Makefile b/arch/x86/platform/Makefile
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+index 021eee9..8d87439 100644
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+--- a/arch/x86/platform/Makefile
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++++ b/arch/x86/platform/Makefile
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+@@ -1,6 +1,7 @@
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+ # Platform specific code goes here
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+ obj-y += ce4100/
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+ obj-y += efi/
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++obj-y += geode/
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+ obj-y += iris/
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+ obj-y += mrst/
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+ obj-y += olpc/
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+diff --git a/arch/x86/platform/geode/Makefile b/arch/x86/platform/geode/Makefile
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+new file mode 100644
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+index 0000000..07c9cd0
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+--- /dev/null
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++++ b/arch/x86/platform/geode/Makefile
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+@@ -0,0 +1 @@
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++obj-$(CONFIG_ALIX) += alix.o
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+diff --git a/arch/x86/platform/geode/alix.c b/arch/x86/platform/geode/alix.c
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+new file mode 100644
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+index 0000000..f3f01e2
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+--- /dev/null
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++++ b/arch/x86/platform/geode/alix.c
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+@@ -0,0 +1,141 @@
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++/*
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++ * System Specific setup for PCEngines ALIX.
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++ * At the moment this means setup of GPIO control of LEDs
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++ * on Alix.2/3/6 boards.
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++ *
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++ *
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++ * Copyright (C) 2008 Constantin Baranov <[email protected]>
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++ * Copyright (C) 2011 Ed Wildgoose <[email protected]>
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++ *
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++ * TODO: There are large similarities with leds-net5501.c
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++ * by Alessandro Zummo <[email protected]>
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++ * In the future leds-net5501.c should be migrated over to platform
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++ *
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++ * This program is free software; you can redistribute it and/or modify
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++ * it under the terms of the GNU General Public License version 2
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++ * as published by the Free Software Foundation.
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++ */
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++
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++#include <linux/kernel.h>
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++#include <linux/init.h>
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++#include <linux/io.h>
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++#include <linux/string.h>
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++#include <linux/leds.h>
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++#include <linux/platform_device.h>
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++#include <linux/gpio.h>
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++
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++#include <asm/geode.h>
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++
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++static int force = 0;
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++module_param(force, bool, 0444);
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++/* FIXME: Award bios is not automatically detected as Alix platform */
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++MODULE_PARM_DESC(force, "Force detection as ALIX.2/ALIX.3 platform");
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++
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++static struct gpio_led alix_leds[] = {
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++ {
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++ .name = "alix:1",
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++ .gpio = 6,
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++ .default_trigger = "default-on",
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++ .active_low = 1,
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++ },
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++ {
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++ .name = "alix:2",
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++ .gpio = 25,
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++ .default_trigger = "default-off",
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++ .active_low = 1,
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++ },
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++ {
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++ .name = "alix:3",
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++ .gpio = 27,
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++ .default_trigger = "default-off",
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++ .active_low = 1,
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++ },
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++};
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++
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++static struct gpio_led_platform_data alix_leds_data = {
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++ .num_leds = ARRAY_SIZE(alix_leds),
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++ .leds = alix_leds,
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++};
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++
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++static struct platform_device alix_leds_dev = {
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++ .name = "leds-gpio",
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++ .id = -1,
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++ .dev.platform_data = &alix_leds_data,
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++};
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++
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++static void __init register_alix(void)
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++{
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++ /* Setup LED control through leds-gpio driver */
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++ platform_device_register(&alix_leds_dev);
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++}
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++
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++static int __init alix_present(unsigned long bios_phys,
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++ const char *alix_sig,
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++ size_t alix_sig_len)
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++{
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++ const size_t bios_len = 0x00010000;
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++ const char *bios_virt;
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++ const char *scan_end;
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++ const char *p;
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++ char name[64];
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++
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++ if (force) {
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++ printk(KERN_NOTICE "%s: forced to skip BIOS test, "
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++ "assume system is ALIX.2/ALIX.3\n",
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++ KBUILD_MODNAME);
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++ return 1;
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++ }
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++
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++ bios_virt = phys_to_virt(bios_phys);
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++ scan_end = bios_virt + bios_len - (alix_sig_len + 2);
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++ for (p = bios_virt; p < scan_end; p++) {
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++ const char *tail;
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++ char *a;
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++
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++ if (memcmp(p, alix_sig, alix_sig_len) != 0)
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++ continue;
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++
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++ memcpy(name, p, sizeof(name));
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++
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++ /* remove the first \0 character from string */
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++ a = strchr(name, '\0');
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++ if (a)
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++ *a = ' ';
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++
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++ /* cut the string at a newline */
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++ a = strchr(name, '\r');
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++ if (a)
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++ *a = '\0';
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++
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++ tail = p + alix_sig_len;
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++ if ((tail[0] == '2' || tail[0] == '3')) {
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++ printk(KERN_INFO
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++ "%s: system is recognized as \"%s\"\n",
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++ KBUILD_MODNAME, name);
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++ return 1;
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++ }
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++ }
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++
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++ return 0;
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++}
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++
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++static int __init alix_init(void)
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++{
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++ const char tinybios_sig[] = "PC Engines ALIX.";
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++ const char coreboot_sig[] = "PC Engines\0ALIX.";
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++
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++ if (!is_geode())
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++ return 0;
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++
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++ if (alix_present(0xf0000, tinybios_sig, sizeof(tinybios_sig) - 1) ||
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++ alix_present(0x500, coreboot_sig, sizeof(coreboot_sig) - 1))
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++ register_alix();
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++
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++ return 0;
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++}
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++
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++module_init(alix_init);
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++
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++MODULE_AUTHOR("Ed Wildgoose <[email protected]>");
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++MODULE_DESCRIPTION("PCEngines ALIX System Setup");
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++MODULE_LICENSE("GPL");
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+diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
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+index b591e72..8974d27 100644
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+--- a/drivers/leds/Kconfig
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++++ b/drivers/leds/Kconfig
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+@@ -107,14 +107,6 @@
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+ help
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+ This option enables support for the PCEngines WRAP programmable LEDs.
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+
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+-config LEDS_ALIX2
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+- tristate "LED Support for ALIX.2 and ALIX.3 series"
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+- depends on LEDS_CLASS
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+- depends on X86 && !GPIO_CS5535 && !CS5535_GPIO
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+- help
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+- This option enables support for the PCEngines ALIX.2 and ALIX.3 LEDs.
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+- You have to set leds-alix2.force=1 for boards with Award BIOS.
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+-
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+ config LEDS_H1940
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+ tristate "LED Support for iPAQ H1940 device"
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+ depends on LEDS_CLASS
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+diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
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+index bbfd2e3..a0a1b89 100644
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+--- a/drivers/leds/Makefile
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++++ b/drivers/leds/Makefile
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+@@ -16,7 +16,6 @@ obj-$(CONFIG_LEDS_AMS_DELTA) += leds-ams-delta.o
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+ obj-$(CONFIG_LEDS_NET48XX) += leds-net48xx.o
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+ obj-$(CONFIG_LEDS_NET5501) += leds-net5501.o
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+ obj-$(CONFIG_LEDS_WRAP) += leds-wrap.o
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+-obj-$(CONFIG_LEDS_ALIX2) += leds-alix2.o
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+ obj-$(CONFIG_LEDS_H1940) += leds-h1940.o
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+ obj-$(CONFIG_LEDS_COBALT_QUBE) += leds-cobalt-qube.o
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+ obj-$(CONFIG_LEDS_COBALT_RAQ) += leds-cobalt-raq.o
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+diff --git a/drivers/leds/leds-alix2.c b/drivers/leds/leds-alix2.c
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+deleted file mode 100644
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+index f59ffad..0000000
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+--- a/drivers/leds/leds-alix2.c
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++++ /dev/null
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+@@ -1,239 +0,0 @@
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+-/*
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+- * LEDs driver for PCEngines ALIX.2 and ALIX.3
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+- *
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+- * Copyright (C) 2008 Constantin Baranov <[email protected]>
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+- */
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+-
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+-#include <linux/err.h>
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+-#include <linux/io.h>
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+-#include <linux/kernel.h>
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+-#include <linux/leds.h>
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+-#include <linux/module.h>
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+-#include <linux/platform_device.h>
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+-#include <linux/string.h>
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+-#include <linux/pci.h>
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+-
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+-static int force = 0;
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+-module_param(force, bool, 0444);
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+-MODULE_PARM_DESC(force, "Assume system has ALIX.2/ALIX.3 style LEDs");
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+-
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+-#define MSR_LBAR_GPIO 0x5140000C
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+-#define CS5535_GPIO_SIZE 256
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+-
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+-static u32 gpio_base;
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+-
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+-static struct pci_device_id divil_pci[] = {
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+- { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_ISA) },
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+- { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA) },
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+- { } /* NULL entry */
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+-};
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+-MODULE_DEVICE_TABLE(pci, divil_pci);
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+-
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+-struct alix_led {
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+- struct led_classdev cdev;
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+- unsigned short port;
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+- unsigned int on_value;
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+- unsigned int off_value;
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+-};
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+-
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+-static void alix_led_set(struct led_classdev *led_cdev,
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+- enum led_brightness brightness)
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+-{
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+- struct alix_led *led_dev =
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+- container_of(led_cdev, struct alix_led, cdev);
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+-
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+- if (brightness)
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+- outl(led_dev->on_value, gpio_base + led_dev->port);
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+- else
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+- outl(led_dev->off_value, gpio_base + led_dev->port);
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+-}
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+-
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+-static struct alix_led alix_leds[] = {
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+- {
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+- .cdev = {
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+- .name = "alix:1",
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+- .brightness_set = alix_led_set,
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+- },
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+- .port = 0x00,
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+- .on_value = 1 << 22,
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+- .off_value = 1 << 6,
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+- },
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+- {
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+- .cdev = {
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+- .name = "alix:2",
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+- .brightness_set = alix_led_set,
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+- },
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+- .port = 0x80,
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+- .on_value = 1 << 25,
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+- .off_value = 1 << 9,
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+- },
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+- {
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+- .cdev = {
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+- .name = "alix:3",
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+- .brightness_set = alix_led_set,
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+- },
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+- .port = 0x80,
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+- .on_value = 1 << 27,
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+- .off_value = 1 << 11,
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+- },
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+-};
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+-
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+-static int __init alix_led_probe(struct platform_device *pdev)
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+-{
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+- int i;
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+- int ret;
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+-
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+- for (i = 0; i < ARRAY_SIZE(alix_leds); i++) {
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+- alix_leds[i].cdev.flags |= LED_CORE_SUSPENDRESUME;
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+- ret = led_classdev_register(&pdev->dev, &alix_leds[i].cdev);
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+- if (ret < 0)
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+- goto fail;
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+- }
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+- return 0;
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+-
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+-fail:
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+- while (--i >= 0)
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+- led_classdev_unregister(&alix_leds[i].cdev);
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+- return ret;
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+-}
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+-
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+-static int alix_led_remove(struct platform_device *pdev)
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+-{
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+- int i;
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+-
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+- for (i = 0; i < ARRAY_SIZE(alix_leds); i++)
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+- led_classdev_unregister(&alix_leds[i].cdev);
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+- return 0;
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+-}
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+-
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+-static struct platform_driver alix_led_driver = {
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+- .remove = alix_led_remove,
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+- .driver = {
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+- .name = KBUILD_MODNAME,
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+- .owner = THIS_MODULE,
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+- },
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+-};
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+-
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+-static int __init alix_present(unsigned long bios_phys,
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+- const char *alix_sig,
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+- size_t alix_sig_len)
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+-{
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+- const size_t bios_len = 0x00010000;
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+- const char *bios_virt;
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+- const char *scan_end;
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+- const char *p;
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+- char name[64];
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+-
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|
+- if (force) {
|
|
|
+- printk(KERN_NOTICE "%s: forced to skip BIOS test, "
|
|
|
+- "assume system has ALIX.2 style LEDs\n",
|
|
|
+- KBUILD_MODNAME);
|
|
|
+- return 1;
|
|
|
+- }
|
|
|
+-
|
|
|
+- bios_virt = phys_to_virt(bios_phys);
|
|
|
+- scan_end = bios_virt + bios_len - (alix_sig_len + 2);
|
|
|
+- for (p = bios_virt; p < scan_end; p++) {
|
|
|
+- const char *tail;
|
|
|
+- char *a;
|
|
|
+-
|
|
|
+- if (memcmp(p, alix_sig, alix_sig_len) != 0)
|
|
|
+- continue;
|
|
|
+-
|
|
|
+- memcpy(name, p, sizeof(name));
|
|
|
+-
|
|
|
+- /* remove the first \0 character from string */
|
|
|
+- a = strchr(name, '\0');
|
|
|
+- if (a)
|
|
|
+- *a = ' ';
|
|
|
+-
|
|
|
+- /* cut the string at a newline */
|
|
|
+- a = strchr(name, '\r');
|
|
|
+- if (a)
|
|
|
+- *a = '\0';
|
|
|
+-
|
|
|
+- tail = p + alix_sig_len;
|
|
|
+- if ((tail[0] == '2' || tail[0] == '3')) {
|
|
|
+- printk(KERN_INFO
|
|
|
+- "%s: system is recognized as \"%s\"\n",
|
|
|
+- KBUILD_MODNAME, name);
|
|
|
+- return 1;
|
|
|
+- }
|
|
|
+- }
|
|
|
+-
|
|
|
+- return 0;
|
|
|
+-}
|
|
|
+-
|
|
|
+-static struct platform_device *pdev;
|
|
|
+-
|
|
|
+-static int __init alix_pci_led_init(void)
|
|
|
+-{
|
|
|
+- u32 low, hi;
|
|
|
+-
|
|
|
+- if (pci_dev_present(divil_pci) == 0) {
|
|
|
+- printk(KERN_WARNING KBUILD_MODNAME": DIVIL not found\n");
|
|
|
+- return -ENODEV;
|
|
|
+- }
|
|
|
+-
|
|
|
+- /* Grab the GPIO I/O range */
|
|
|
+- rdmsr(MSR_LBAR_GPIO, low, hi);
|
|
|
+-
|
|
|
+- /* Check the mask and whether GPIO is enabled (sanity check) */
|
|
|
+- if (hi != 0x0000f001) {
|
|
|
+- printk(KERN_WARNING KBUILD_MODNAME": GPIO not enabled\n");
|
|
|
+- return -ENODEV;
|
|
|
+- }
|
|
|
+-
|
|
|
+- /* Mask off the IO base address */
|
|
|
+- gpio_base = low & 0x0000ff00;
|
|
|
+-
|
|
|
+- if (!request_region(gpio_base, CS5535_GPIO_SIZE, KBUILD_MODNAME)) {
|
|
|
+- printk(KERN_ERR KBUILD_MODNAME": can't allocate I/O for GPIO\n");
|
|
|
+- return -ENODEV;
|
|
|
+- }
|
|
|
+-
|
|
|
+- /* Set GPIO function to output */
|
|
|
+- outl(1 << 6, gpio_base + 0x04);
|
|
|
+- outl(1 << 9, gpio_base + 0x84);
|
|
|
+- outl(1 << 11, gpio_base + 0x84);
|
|
|
+-
|
|
|
+- return 0;
|
|
|
+-}
|
|
|
+-
|
|
|
+-static int __init alix_led_init(void)
|
|
|
+-{
|
|
|
+- int ret = -ENODEV;
|
|
|
+- const char tinybios_sig[] = "PC Engines ALIX.";
|
|
|
+- const char coreboot_sig[] = "PC Engines\0ALIX.";
|
|
|
+-
|
|
|
+- if (alix_present(0xf0000, tinybios_sig, sizeof(tinybios_sig) - 1) ||
|
|
|
+- alix_present(0x500, coreboot_sig, sizeof(coreboot_sig) - 1))
|
|
|
+- ret = alix_pci_led_init();
|
|
|
+-
|
|
|
+- if (ret < 0)
|
|
|
+- return ret;
|
|
|
+-
|
|
|
+- pdev = platform_device_register_simple(KBUILD_MODNAME, -1, NULL, 0);
|
|
|
+- if (!IS_ERR(pdev)) {
|
|
|
+- ret = platform_driver_probe(&alix_led_driver, alix_led_probe);
|
|
|
+- if (ret)
|
|
|
+- platform_device_unregister(pdev);
|
|
|
+- } else
|
|
|
+- ret = PTR_ERR(pdev);
|
|
|
+-
|
|
|
+- return ret;
|
|
|
+-}
|
|
|
+-
|
|
|
+-static void __exit alix_led_exit(void)
|
|
|
+-{
|
|
|
+- platform_device_unregister(pdev);
|
|
|
+- platform_driver_unregister(&alix_led_driver);
|
|
|
+- release_region(gpio_base, CS5535_GPIO_SIZE);
|
|
|
+-}
|
|
|
+-
|
|
|
+-module_init(alix_led_init);
|
|
|
+-module_exit(alix_led_exit);
|
|
|
+-
|
|
|
+-MODULE_AUTHOR("Constantin Baranov <[email protected]>");
|
|
|
+-MODULE_DESCRIPTION("PCEngines ALIX.2 and ALIX.3 LED driver");
|
|
|
+-MODULE_LICENSE("GPL");
|
Florian Fainelli