arch/mips/ath79/mach-pb44.c

   1 /*
   2  *  Atheros PB44 reference board support
   3  *
   4  *  Copyright (C) 2009-2010 Gabor Juhos <juhosg@openwrt.org>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify it
   7  *  under the terms of the GNU General Public License version 2 as published
   8  *  by the Free Software Foundation.
   9  */
  10
  11 #include <linux/init.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/i2c.h>
  14 #include <linux/i2c-gpio.h>
  15 #include <linux/i2c/pcf857x.h>
  16
  17 #include "machtypes.h"
  18 #include "dev-gpio-buttons.h"
  19 #include "dev-leds-gpio.h"
  20
  21 #define PB44_GPIO_I2C_SCL       0
  22 #define PB44_GPIO_I2C_SDA       1
  23
  24 #define PB44_GPIO_EXP_BASE      16
  25 #define PB44_GPIO_SW_RESET      (PB44_GPIO_EXP_BASE + 6)
  26 #define PB44_GPIO_SW_JUMP       (PB44_GPIO_EXP_BASE + 8)
  27 #define PB44_GPIO_LED_JUMP1     (PB44_GPIO_EXP_BASE + 9)
  28 #define PB44_GPIO_LED_JUMP2     (PB44_GPIO_EXP_BASE + 10)
  29
  30 #define PB44_KEYS_POLL_INTERVAL         20      /* msecs */
  31 #define PB44_KEYS_DEBOUNCE_INTERVAL     (3 * PB44_KEYS_POLL_INTERVAL)
  32
  33 static struct i2c_gpio_platform_data pb44_i2c_gpio_data = {
  34         .sda_pin        = PB44_GPIO_I2C_SDA,
  35         .scl_pin        = PB44_GPIO_I2C_SCL,
  36 };
  37
  38 static struct platform_device pb44_i2c_gpio_device = {
  39         .name           = "i2c-gpio",
  40         .id             = 0,
  41         .dev = {
  42                 .platform_data  = &pb44_i2c_gpio_data,
  43         }
  44 };
  45
  46 static struct pcf857x_platform_data pb44_pcf857x_data = {
  47         .gpio_base      = PB44_GPIO_EXP_BASE,
  48 };
  49
  50 static struct i2c_board_info pb44_i2c_board_info[] __initdata = {
  51         {
  52                 I2C_BOARD_INFO("pcf8575", 0x20),
  53                 .platform_data  = &pb44_pcf857x_data,
  54         },
  55 };
  56
  57 static struct gpio_led pb44_leds_gpio[] __initdata = {
  58         {
  59                 .name           = "pb44:amber:jump1",
  60                 .gpio           = PB44_GPIO_LED_JUMP1,
  61                 .active_low     = 1,
  62         }, {
  63                 .name           = "pb44:green:jump2",
  64                 .gpio           = PB44_GPIO_LED_JUMP2,
  65                 .active_low     = 1,
  66         },
  67 };
  68
  69 static struct gpio_keys_button pb44_gpio_keys[] __initdata = {
  70         {
  71                 .desc           = "soft_reset",
  72                 .type           = EV_KEY,
  73                 .code           = KEY_RESTART,
  74                 .debounce_interval = PB44_KEYS_DEBOUNCE_INTERVAL,
  75                 .gpio           = PB44_GPIO_SW_RESET,
  76                 .active_low     = 1,
  77         } , {
  78                 .desc           = "jumpstart",
  79                 .type           = EV_KEY,
  80                 .code           = KEY_WPS_BUTTON,
  81                 .debounce_interval = PB44_KEYS_DEBOUNCE_INTERVAL,
  82                 .gpio           = PB44_GPIO_SW_JUMP,
  83                 .active_low     = 1,
  84         }
  85 };
  86
  87 static void __init pb44_init(void)
  88 {
  89         i2c_register_board_info(0, pb44_i2c_board_info,
  90                                 ARRAY_SIZE(pb44_i2c_board_info));
  91         platform_device_register(&pb44_i2c_gpio_device);
  92
  93         ath79_register_leds_gpio(-1, ARRAY_SIZE(pb44_leds_gpio),
  94                                  pb44_leds_gpio);
  95         ath79_register_gpio_keys_polled(-1, PB44_KEYS_POLL_INTERVAL,
  96                                         ARRAY_SIZE(pb44_gpio_keys),
  97                                         pb44_gpio_keys);
  98 }
  99
 100 MIPS_MACHINE(ATH79_MACH_PB44, "PB44", "Atheros PB44 reference board",
 101              pb44_init);