target/linux/x86/patches-3.3/002-geos_platform.patch

   1 From 31bc84d45320dad2392384381ad4d818ab21087a Mon Sep 17 00:00:00 2001
   2 From: "Philip A. Prindeville" <philipp@redfish-solutions.com>
   3 Date: Wed, 18 Jan 2012 11:15:33 -0700
   4 Subject: [PATCH 1/1] geos: Platform driver for Geos and Geos2 single-board
   5  computers.
   6
   7 Trivial platform driver for Traverse Technologies Geos and Geos2
   8 single-board computers. Uses SMBIOS to identify platform.
   9 Based on progressive revisions of the leds-net5501 driver that
  10 was rewritten by Ed Wildgoose as a platform driver.
  11
  12 Supports GPIO-based LEDs (3) and 1 polled button which is
  13 typically used for a soft reset.
  14
  15 Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>
  16 Reviewed-by: Ed Wildgoose <ed@wildgooses.com>
  17 Acked-by: Andres Salomon <dilinger@queued.net>
  18 Cc: Richard Purdie <rpurdie@rpsys.net>
  19 Cc: Andrew Morton <akpm@linux-foundation.org>
  20 ---
  21  arch/x86/Kconfig                 |    7 ++
  22  arch/x86/platform/geode/Makefile |    1 +
  23  arch/x86/platform/geode/geos.c   |  128 ++++++++++++++++++++++++++++++++++++++
  24  3 files changed, 136 insertions(+), 0 deletions(-)
  25  create mode 100644 arch/x86/platform/geode/geos.c
  26
  27 diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
  28 index 07c3f15..4ee921b 100644
  29 --- a/arch/x86/Kconfig
  30 +++ b/arch/x86/Kconfig
  31 @@ -2168,6 +2168,13 @@ config ALIX
  32
  33           Note: You have to set alix.force=1 for boards with Award BIOS.
  34
  35 +config GEOS
  36 +       bool "Traverse Technologies GEOS System Support (LEDS, GPIO, etc)"
  37 +       select GPIOLIB
  38 +       depends on DMI
  39 +       ---help---
  40 +         This option enables system support for the Traverse Technologies GEOS.
  41 +
  42  endif # X86_32
  43
  44  config AMD_NB
  45 diff --git a/arch/x86/platform/geode/Makefile b/arch/x86/platform/geode/Makefile
  46 index 07c9cd0..d8ba564 100644
  47 --- a/arch/x86/platform/geode/Makefile
  48 +++ b/arch/x86/platform/geode/Makefile
  49 @@ -1 +1,2 @@
  50  obj-$(CONFIG_ALIX)             += alix.o
  51 +obj-$(CONFIG_GEOS)             += geos.o
  52 diff --git a/arch/x86/platform/geode/geos.c b/arch/x86/platform/geode/geos.c
  53 new file mode 100644
  54 index 0000000..c2e6d53
  55 --- /dev/null
  56 +++ b/arch/x86/platform/geode/geos.c
  57 @@ -0,0 +1,128 @@
  58 +/*
  59 + * System Specific setup for Traverse Technologies GEOS.
  60 + * At the moment this means setup of GPIO control of LEDs.
  61 + *
  62 + * Copyright (C) 2008 Constantin Baranov <const@mimas.ru>
  63 + * Copyright (C) 2011 Ed Wildgoose <kernel@wildgooses.com>
  64 + *                and Philip Prindeville <philipp@redfish-solutions.com>
  65 + *
  66 + * TODO: There are large similarities with leds-net5501.c
  67 + * by Alessandro Zummo <a.zummo@towertech.it>
  68 + * In the future leds-net5501.c should be migrated over to platform
  69 + *
  70 + * This program is free software; you can redistribute it and/or modify
  71 + * it under the terms of the GNU General Public License version 2
  72 + * as published by the Free Software Foundation.
  73 + */
  74 +
  75 +#include <linux/kernel.h>
  76 +#include <linux/init.h>
  77 +#include <linux/io.h>
  78 +#include <linux/string.h>
  79 +#include <linux/module.h>
  80 +#include <linux/leds.h>
  81 +#include <linux/platform_device.h>
  82 +#include <linux/gpio.h>
  83 +#include <linux/input.h>
  84 +#include <linux/gpio_keys.h>
  85 +#include <linux/dmi.h>
  86 +
  87 +#include <asm/geode.h>
  88 +
  89 +static struct gpio_keys_button geos_gpio_buttons[] = {
  90 +       {
  91 +               .code = KEY_RESTART,
  92 +               .gpio = 3,
  93 +               .active_low = 1,
  94 +               .desc = "Reset button",
  95 +               .type = EV_KEY,
  96 +               .wakeup = 0,
  97 +               .debounce_interval = 100,
  98 +               .can_disable = 0,
  99 +       }
 100 +};
 101 +static struct gpio_keys_platform_data geos_buttons_data = {
 102 +       .buttons = geos_gpio_buttons,
 103 +       .nbuttons = ARRAY_SIZE(geos_gpio_buttons),
 104 +       .poll_interval = 20,
 105 +};
 106 +
 107 +static struct platform_device geos_buttons_dev = {
 108 +       .name = "gpio-keys-polled",
 109 +       .id = 1,
 110 +       .dev = {
 111 +               .platform_data = &geos_buttons_data,
 112 +       }
 113 +};
 114 +
 115 +static struct gpio_led geos_leds[] = {
 116 +       {
 117 +               .name = "geos:1",
 118 +               .gpio = 6,
 119 +               .default_trigger = "default-on",
 120 +               .active_low = 1,
 121 +       },
 122 +       {
 123 +               .name = "geos:2",
 124 +               .gpio = 25,
 125 +               .default_trigger = "default-off",
 126 +               .active_low = 1,
 127 +       },
 128 +       {
 129 +               .name = "geos:3",
 130 +               .gpio = 27,
 131 +               .default_trigger = "default-off",
 132 +               .active_low = 1,
 133 +       },
 134 +};
 135 +
 136 +static struct gpio_led_platform_data geos_leds_data = {
 137 +       .num_leds = ARRAY_SIZE(geos_leds),
 138 +       .leds = geos_leds,
 139 +};
 140 +
 141 +static struct platform_device geos_leds_dev = {
 142 +       .name = "leds-gpio",
 143 +       .id = -1,
 144 +       .dev.platform_data = &geos_leds_data,
 145 +};
 146 +
 147 +static struct __initdata platform_device *geos_devs[] = {
 148 +       &geos_buttons_dev,
 149 +       &geos_leds_dev,
 150 +};
 151 +
 152 +static void __init register_geos(void)
 153 +{
 154 +       /* Setup LED control through leds-gpio driver */
 155 +       platform_add_devices(geos_devs, ARRAY_SIZE(geos_devs));
 156 +}
 157 +
 158 +static int __init geos_init(void)
 159 +{
 160 +       const char *vendor, *product;
 161 +
 162 +       if (!is_geode())
 163 +               return 0;
 164 +
 165 +       vendor = dmi_get_system_info(DMI_SYS_VENDOR);
 166 +       if (!vendor || strcmp(vendor, "Traverse Technologies"))
 167 +               return 0;
 168 +
 169 +       product = dmi_get_system_info(DMI_PRODUCT_NAME);
 170 +       if (!product || strcmp(product, "Geos"))
 171 +               return 0;
 172 +
 173 +       printk(KERN_INFO "%s: system is recognized as \"%s %s\"\n",
 174 +              KBUILD_MODNAME, vendor, product);
 175 +
 176 +       register_geos();
 177 +
 178 +       return 0;
 179 +}
 180 +
 181 +module_init(geos_init);
 182 +
 183 +MODULE_AUTHOR("Philip Prindeville <philipp@redfish-solutions.com>");
 184 +MODULE_DESCRIPTION("Traverse Technologies Geos System Setup");
 185 +MODULE_LICENSE("GPL");
 186 --
 187 1.7.7.4
 188