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 --- a/arch/x86/Kconfig
  28 +++ b/arch/x86/Kconfig
  29 @@ -2133,6 +2133,13 @@ config ALIX
  30
  31           Note: You have to set alix.force=1 for boards with Award BIOS.
  32
  33 +config GEOS
  34 +       bool "Traverse Technologies GEOS System Support (LEDS, GPIO, etc)"
  35 +       select GPIOLIB
  36 +       depends on DMI
  37 +       ---help---
  38 +         This option enables system support for the Traverse Technologies GEOS.
  39 +
  40  endif # X86_32
  41
  42  config AMD_NB
  43 --- a/arch/x86/platform/geode/Makefile
  44 +++ b/arch/x86/platform/geode/Makefile
  45 @@ -1 +1,2 @@
  46  obj-$(CONFIG_ALIX)             += alix.o
  47 +obj-$(CONFIG_GEOS)             += geos.o
  48 --- /dev/null
  49 +++ b/arch/x86/platform/geode/geos.c
  50 @@ -0,0 +1,128 @@
  51 +/*
  52 + * System Specific setup for Traverse Technologies GEOS.
  53 + * At the moment this means setup of GPIO control of LEDs.
  54 + *
  55 + * Copyright (C) 2008 Constantin Baranov <const@mimas.ru>
  56 + * Copyright (C) 2011 Ed Wildgoose <kernel@wildgooses.com>
  57 + *                and Philip Prindeville <philipp@redfish-solutions.com>
  58 + *
  59 + * TODO: There are large similarities with leds-net5501.c
  60 + * by Alessandro Zummo <a.zummo@towertech.it>
  61 + * In the future leds-net5501.c should be migrated over to platform
  62 + *
  63 + * This program is free software; you can redistribute it and/or modify
  64 + * it under the terms of the GNU General Public License version 2
  65 + * as published by the Free Software Foundation.
  66 + */
  67 +
  68 +#include <linux/kernel.h>
  69 +#include <linux/init.h>
  70 +#include <linux/io.h>
  71 +#include <linux/string.h>
  72 +#include <linux/module.h>
  73 +#include <linux/leds.h>
  74 +#include <linux/platform_device.h>
  75 +#include <linux/gpio.h>
  76 +#include <linux/input.h>
  77 +#include <linux/gpio_keys.h>
  78 +#include <linux/dmi.h>
  79 +
  80 +#include <asm/geode.h>
  81 +
  82 +static struct gpio_keys_button geos_gpio_buttons[] = {
  83 +       {
  84 +               .code = KEY_RESTART,
  85 +               .gpio = 3,
  86 +               .active_low = 1,
  87 +               .desc = "Reset button",
  88 +               .type = EV_KEY,
  89 +               .wakeup = 0,
  90 +               .debounce_interval = 100,
  91 +               .can_disable = 0,
  92 +       }
  93 +};
  94 +static struct gpio_keys_platform_data geos_buttons_data = {
  95 +       .buttons = geos_gpio_buttons,
  96 +       .nbuttons = ARRAY_SIZE(geos_gpio_buttons),
  97 +       .poll_interval = 20,
  98 +};
  99 +
 100 +static struct platform_device geos_buttons_dev = {
 101 +       .name = "gpio-keys-polled",
 102 +       .id = 1,
 103 +       .dev = {
 104 +               .platform_data = &geos_buttons_data,
 105 +       }
 106 +};
 107 +
 108 +static struct gpio_led geos_leds[] = {
 109 +       {
 110 +               .name = "geos:1",
 111 +               .gpio = 6,
 112 +               .default_trigger = "default-on",
 113 +               .active_low = 1,
 114 +       },
 115 +       {
 116 +               .name = "geos:2",
 117 +               .gpio = 25,
 118 +               .default_trigger = "default-off",
 119 +               .active_low = 1,
 120 +       },
 121 +       {
 122 +               .name = "geos:3",
 123 +               .gpio = 27,
 124 +               .default_trigger = "default-off",
 125 +               .active_low = 1,
 126 +       },
 127 +};
 128 +
 129 +static struct gpio_led_platform_data geos_leds_data = {
 130 +       .num_leds = ARRAY_SIZE(geos_leds),
 131 +       .leds = geos_leds,
 132 +};
 133 +
 134 +static struct platform_device geos_leds_dev = {
 135 +       .name = "leds-gpio",
 136 +       .id = -1,
 137 +       .dev.platform_data = &geos_leds_data,
 138 +};
 139 +
 140 +static struct __initdata platform_device *geos_devs[] = {
 141 +       &geos_buttons_dev,
 142 +       &geos_leds_dev,
 143 +};
 144 +
 145 +static void __init register_geos(void)
 146 +{
 147 +       /* Setup LED control through leds-gpio driver */
 148 +       platform_add_devices(geos_devs, ARRAY_SIZE(geos_devs));
 149 +}
 150 +
 151 +static int __init geos_init(void)
 152 +{
 153 +       const char *vendor, *product;
 154 +
 155 +       if (!is_geode())
 156 +               return 0;
 157 +
 158 +       vendor = dmi_get_system_info(DMI_SYS_VENDOR);
 159 +       if (!vendor || strcmp(vendor, "Traverse Technologies"))
 160 +               return 0;
 161 +
 162 +       product = dmi_get_system_info(DMI_PRODUCT_NAME);
 163 +       if (!product || strcmp(product, "Geos"))
 164 +               return 0;
 165 +
 166 +       printk(KERN_INFO "%s: system is recognized as \"%s %s\"\n",
 167 +              KBUILD_MODNAME, vendor, product);
 168 +
 169 +       register_geos();
 170 +
 171 +       return 0;
 172 +}
 173 +
 174 +module_init(geos_init);
 175 +
 176 +MODULE_AUTHOR("Philip Prindeville <philipp@redfish-solutions.com>");
 177 +MODULE_DESCRIPTION("Traverse Technologies Geos System Setup");
 178 +MODULE_LICENSE("GPL");