target/linux/generic/patches-2.6.39/106-alix_platform_gpio_keys_button.patch

   1 --- a/arch/x86/platform/geode/alix.c    2011-08-13 15:51:30.892956346 -0600
   2 +++ b/arch/x86/platform/geode/alix.c    2011-08-13 16:14:58.082329961 -0600
   3 @@ -6,6 +6,7 @@
   4   *
   5   * Copyright (C) 2008 Constantin Baranov <const@mimas.ru>
   6   * Copyright (C) 2011 Ed Wildgoose <kernel@wildgooses.com>
   7 + *                and Philip Prindeville <philipp@redfish-solutions.com>
   8   *
   9   * TODO: There are large similarities with leds-net5501.c
  10   * by Alessandro Zummo <a.zummo@towertech.it>
  11 @@ -24,14 +25,48 @@
  12  #include <linux/leds.h>
  13  #include <linux/platform_device.h>
  14  #include <linux/gpio.h>
  15 +#include <linux/input.h>
  16 +#include <linux/gpio_keys.h>
  17
  18  #include <asm/geode.h>
  19
  20 +#define BIOS_SIGNATURE_TINYBIOS        0x000f0000
  21 +#define BIOS_SIGNATURE_COREBOOT        0x00000050
  22 +#define BIOS_REGION_SIZE               0x00010000
  23 +
  24 +static int model = 0;
  25 +
  26  static int force = 0;
  27  module_param(force, bool, 0444);
  28  /* FIXME: Award bios is not automatically detected as Alix platform */
  29  MODULE_PARM_DESC(force, "Force detection as ALIX.2/ALIX.3 platform");
  30
  31 +static struct gpio_keys_button alix_gpio_buttons[] = {
  32 +       {
  33 +               .code = KEY_RESTART,
  34 +               .gpio = 24,
  35 +               .active_low = 1,
  36 +               .desc = "Reset button",
  37 +               .type = EV_KEY,
  38 +               .wakeup = 0,
  39 +               .debounce_interval = 100,
  40 +               .can_disable = 0,
  41 +       }
  42 +};
  43 +static struct gpio_keys_platform_data alix_buttons_data = {
  44 +       .buttons = alix_gpio_buttons,
  45 +       .nbuttons = ARRAY_SIZE(alix_gpio_buttons),
  46 +       .poll_interval = 20,
  47 +};
  48 +
  49 +static struct platform_device alix_buttons_dev = {
  50 +       .name = "gpio-keys-polled",
  51 +       .id = 1,
  52 +       .dev = {
  53 +               .platform_data = &alix_buttons_data,
  54 +       }
  55 +};
  56 +
  57  static struct gpio_led alix_leds[] = {
  58         {
  59                 .name = "alix:1",
  60 @@ -64,17 +98,22 @@
  61         .dev.platform_data = &alix_leds_data,
  62  };
  63
  64 +static struct __initdata platform_device *alix_devs[] = {
  65 +       &alix_buttons_dev,
  66 +       &alix_leds_dev,
  67 +};
  68 +
  69  static void __init register_alix(void)
  70  {
  71         /* Setup LED control through leds-gpio driver */
  72 -       platform_device_register(&alix_leds_dev);
  73 +       platform_add_devices(alix_devs, ARRAY_SIZE(alix_devs));
  74  }
  75
  76  static int __init alix_present(unsigned long bios_phys,
  77                                 const char *alix_sig,
  78                                 size_t alix_sig_len)
  79  {
  80 -       const size_t bios_len = 0x00010000;
  81 +       const size_t bios_len = BIOS_REGION_SIZE;
  82         const char *bios_virt;
  83         const char *scan_end;
  84         const char *p;
  85 @@ -109,7 +148,9 @@
  86                         *a = '\0';
  87
  88                 tail = p + alix_sig_len;
  89 -               if ((tail[0] == '2' || tail[0] == '3')) {
  90 +               if ((tail[0] == '2' || tail[0] == '3' || tail[0] == '6')) {
  91 +                       model = tail[0] - '0';
  92 +
  93                         printk(KERN_INFO
  94                                "%s: system is recognized as \"%s\"\n",
  95                                KBUILD_MODNAME, name);
  96 @@ -128,8 +169,8 @@
  97         if (!is_geode())
  98                 return 0;
  99
 100 -       if (alix_present(0xf0000, tinybios_sig, sizeof(tinybios_sig) - 1) ||
 101 -           alix_present(0x500, coreboot_sig, sizeof(coreboot_sig) - 1))
 102 +       if (alix_present(BIOS_SIGNATURE_TINYBIOS, tinybios_sig, sizeof(tinybios_sig) - 1) ||
 103 +           alix_present(BIOS_SIGNATURE_COREBOOT, coreboot_sig, sizeof(coreboot_sig) - 1))
 104                 register_alix();
 105
 106         return 0;