arch/arm/mach-omap2/board-apollon-keys.c

   1 /*
   2  * linux/arch/arm/mach-omap2/board-apollon-keys.c
   3  *
   4  * Copyright (C) 2007 Samsung Electronics
   5  * Author: Kyungmin Park <kyungmin.park@samsung.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/init.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/input.h>
  16 #include <linux/gpio_keys.h>
  17
  18 #include <asm/arch/gpio.h>
  19 #include <asm/arch/mux.h>
  20
  21 #define SW_ENTER_GPIO16         16
  22 #define SW_UP_GPIO17            17
  23 #define SW_DOWN_GPIO58          58
  24 #define SW_LEFT_GPIO95          95
  25 #define SW_RIGHT_GPIO96         96
  26 #define SW_ESC_GPIO97           97
  27
  28 static struct gpio_keys_button apollon_gpio_keys_buttons[] = {
  29         [0] = {
  30                 .code           = KEY_ENTER,
  31                 .gpio           = SW_ENTER_GPIO16,
  32                 .desc           = "enter sw",
  33         },
  34         [1] = {
  35                 .code           = KEY_UP,
  36                 .gpio           = SW_UP_GPIO17,
  37                 .desc           = "up sw",
  38         },
  39         [2] = {
  40                 .code           = KEY_DOWN,
  41                 .gpio           = SW_DOWN_GPIO58,
  42                 .desc           = "down sw",
  43         },
  44         [3] = {
  45                 .code           = KEY_LEFT,
  46                 .gpio           = SW_LEFT_GPIO95,
  47                 .desc           = "left sw",
  48         },
  49         [4] = {
  50                 .code           = KEY_RIGHT,
  51                 .gpio           = SW_RIGHT_GPIO96,
  52                 .desc           = "right sw",
  53         },
  54         [5] = {
  55                 .code           = KEY_ESC,
  56                 .gpio           = SW_ESC_GPIO97,
  57                 .desc           = "esc sw",
  58         },
  59 };
  60
  61 static struct gpio_keys_platform_data apollon_gpio_keys = {
  62         .buttons                = apollon_gpio_keys_buttons,
  63         .nbuttons               = ARRAY_SIZE(apollon_gpio_keys_buttons),
  64 };
  65
  66 static struct platform_device apollon_gpio_keys_device = {
  67         .name                   = "gpio-keys",
  68         .id                     = -1,
  69         .dev                    = {
  70                 .platform_data  = &apollon_gpio_keys,
  71         },
  72 };
  73
  74 static void __init apollon_sw_init(void)
  75 {
  76         /* Enter SW - Y11 */
  77         omap_cfg_reg(Y11_242X_GPIO16);
  78         /* Up SW - AA12 */
  79         omap_cfg_reg(AA12_242X_GPIO17);
  80         /* Down SW - AA8 */
  81         omap_cfg_reg(AA8_242X_GPIO58);
  82
  83         if (apollon_plus()) {
  84                 /* Left SW - P18 */
  85                 omap_cfg_reg(P18_24XX_GPIO95);
  86                 /* Right SW - M18 */
  87                 omap_cfg_reg(M18_24XX_GPIO96);
  88                 /* Esc SW - L14 */
  89                 omap_cfg_reg(L14_24XX_GPIO97);
  90         } else
  91                 apollon_gpio_keys.nbuttons = 3;
  92 }
  93
  94 static int __init omap_apollon_keys_init(void)
  95 {
  96         apollon_sw_init();
  97
  98         return platform_device_register(&apollon_gpio_keys_device);
  99 }
 100
 101 arch_initcall(omap_apollon_keys_init);