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 #include "dev-spi.h"
  21
  22 #define PB44_GPIO_I2C_SCL       0
  23 #define PB44_GPIO_I2C_SDA       1
  24
  25 #define PB44_GPIO_EXP_BASE      16
  26 #define PB44_GPIO_SW_RESET      (PB44_GPIO_EXP_BASE + 6)
  27 #define PB44_GPIO_SW_JUMP       (PB44_GPIO_EXP_BASE + 8)
  28 #define PB44_GPIO_LED_JUMP1     (PB44_GPIO_EXP_BASE + 9)
  29 #define PB44_GPIO_LED_JUMP2     (PB44_GPIO_EXP_BASE + 10)
  30
  31 #define PB44_KEYS_POLL_INTERVAL         20      /* msecs */
  32 #define PB44_KEYS_DEBOUNCE_INTERVAL     (3 * PB44_KEYS_POLL_INTERVAL)
  33
  34 static struct i2c_gpio_platform_data pb44_i2c_gpio_data = {
  35         .sda_pin        = PB44_GPIO_I2C_SDA,
  36         .scl_pin        = PB44_GPIO_I2C_SCL,
  37 };
  38
  39 static struct platform_device pb44_i2c_gpio_device = {
  40         .name           = "i2c-gpio",
  41         .id             = 0,
  42         .dev = {
  43                 .platform_data  = &pb44_i2c_gpio_data,
  44         }
  45 };
  46
  47 static struct pcf857x_platform_data pb44_pcf857x_data = {
  48         .gpio_base      = PB44_GPIO_EXP_BASE,
  49 };
  50
  51 static struct i2c_board_info pb44_i2c_board_info[] __initdata = {
  52         {
  53                 I2C_BOARD_INFO("pcf8575", 0x20),
  54                 .platform_data  = &pb44_pcf857x_data,
  55         },
  56 };
  57
  58 static struct gpio_led pb44_leds_gpio[] __initdata = {
  59         {
  60                 .name           = "pb44:amber:jump1",
  61                 .gpio           = PB44_GPIO_LED_JUMP1,
  62                 .active_low     = 1,
  63         }, {
  64                 .name           = "pb44:green:jump2",
  65                 .gpio           = PB44_GPIO_LED_JUMP2,
  66                 .active_low     = 1,
  67         },
  68 };
  69
  70 static struct gpio_keys_button pb44_gpio_keys[] __initdata = {
  71         {
  72                 .desc           = "soft_reset",
  73                 .type           = EV_KEY,
  74                 .code           = KEY_RESTART,
  75                 .debounce_interval = PB44_KEYS_DEBOUNCE_INTERVAL,
  76                 .gpio           = PB44_GPIO_SW_RESET,
  77                 .active_low     = 1,
  78         } , {
  79                 .desc           = "jumpstart",
  80                 .type           = EV_KEY,
  81                 .code           = KEY_WPS_BUTTON,
  82                 .debounce_interval = PB44_KEYS_DEBOUNCE_INTERVAL,
  83                 .gpio           = PB44_GPIO_SW_JUMP,
  84                 .active_low     = 1,
  85         }
  86 };
  87
  88 static struct spi_board_info pb44_spi_info[] = {
  89         {
  90                 .bus_num        = 0,
  91                 .chip_select    = 0,
  92                 .max_speed_hz   = 25000000,
  93                 .modalias       = "m25p64",
  94         },
  95 };
  96
  97 static struct ath79_spi_platform_data pb44_spi_data = {
  98         .bus_num                = 0,
  99         .num_chipselect         = 1,
 100 };
 101
 102 static void __init pb44_init(void)
 103 {
 104         i2c_register_board_info(0, pb44_i2c_board_info,
 105                                 ARRAY_SIZE(pb44_i2c_board_info));
 106         platform_device_register(&pb44_i2c_gpio_device);
 107
 108         ath79_register_leds_gpio(-1, ARRAY_SIZE(pb44_leds_gpio),
 109                                  pb44_leds_gpio);
 110         ath79_register_gpio_keys_polled(-1, PB44_KEYS_POLL_INTERVAL,
 111                                         ARRAY_SIZE(pb44_gpio_keys),
 112                                         pb44_gpio_keys);
 113         ath79_register_spi(&pb44_spi_data, pb44_spi_info,
 114                            ARRAY_SIZE(pb44_spi_info));
 115 }
 116
 117 MIPS_MACHINE(ATH79_MACH_PB44, "PB44", "Atheros PB44 reference board",
 118              pb44_init);