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 <mach/gpio.h>
  19 #include <mach/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 extern int apollon_plus(void);
  29
  30 static struct gpio_keys_button apollon_gpio_keys_buttons[] = {
  31         [0] = {
  32                 .code           = KEY_ENTER,
  33                 .gpio           = SW_ENTER_GPIO16,
  34                 .desc           = "enter sw",
  35         },
  36         [1] = {
  37                 .code           = KEY_UP,
  38                 .gpio           = SW_UP_GPIO17,
  39                 .desc           = "up sw",
  40         },
  41         [2] = {
  42                 .code           = KEY_DOWN,
  43                 .gpio           = SW_DOWN_GPIO58,
  44                 .desc           = "down sw",
  45         },
  46         [3] = {
  47                 .code           = KEY_LEFT,
  48                 .gpio           = SW_LEFT_GPIO95,
  49                 .desc           = "left sw",
  50         },
  51         [4] = {
  52                 .code           = KEY_RIGHT,
  53                 .gpio           = SW_RIGHT_GPIO96,
  54                 .desc           = "right sw",
  55         },
  56         [5] = {
  57                 .code           = KEY_ESC,
  58                 .gpio           = SW_ESC_GPIO97,
  59                 .desc           = "esc sw",
  60         },
  61 };
  62
  63 static struct gpio_keys_platform_data apollon_gpio_keys = {
  64         .buttons                = apollon_gpio_keys_buttons,
  65         .nbuttons               = ARRAY_SIZE(apollon_gpio_keys_buttons),
  66 };
  67
  68 static struct platform_device apollon_gpio_keys_device = {
  69         .name                   = "gpio-keys",
  70         .id                     = -1,
  71         .dev                    = {
  72                 .platform_data  = &apollon_gpio_keys,
  73         },
  74 };
  75
  76 static void __init apollon_sw_init(void)
  77 {
  78         /* Enter SW - Y11 */
  79         omap_cfg_reg(Y11_242X_GPIO16);
  80         /* Up SW - AA12 */
  81         omap_cfg_reg(AA12_242X_GPIO17);
  82         /* Down SW - AA8 */
  83         omap_cfg_reg(AA8_242X_GPIO58);
  84
  85         if (apollon_plus()) {
  86                 /* Left SW - P18 */
  87                 omap_cfg_reg(P18_24XX_GPIO95);
  88                 /* Right SW - M18 */
  89                 omap_cfg_reg(M18_24XX_GPIO96);
  90                 /* Esc SW - L14 */
  91                 omap_cfg_reg(L14_24XX_GPIO97);
  92         } else
  93                 apollon_gpio_keys.nbuttons = 3;
  94 }
  95
  96 static int __init omap_apollon_keys_init(void)
  97 {
  98         apollon_sw_init();
  99
 100         return platform_device_register(&apollon_gpio_keys_device);
 101 }
 102
 103 arch_initcall(omap_apollon_keys_init);