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 #include "dev-usb.h"
  22 #include "pci.h"
  23
  24 #define PB44_GPIO_I2C_SCL       0
  25 #define PB44_GPIO_I2C_SDA       1
  26
  27 #define PB44_GPIO_EXP_BASE      16
  28 #define PB44_GPIO_SW_RESET      (PB44_GPIO_EXP_BASE + 6)
  29 #define PB44_GPIO_SW_JUMP       (PB44_GPIO_EXP_BASE + 8)
  30 #define PB44_GPIO_LED_JUMP1     (PB44_GPIO_EXP_BASE + 9)
  31 #define PB44_GPIO_LED_JUMP2     (PB44_GPIO_EXP_BASE + 10)
  32
  33 #define PB44_KEYS_POLL_INTERVAL         20      /* msecs */
  34 #define PB44_KEYS_DEBOUNCE_INTERVAL     (3 * PB44_KEYS_POLL_INTERVAL)
  35
  36 static struct i2c_gpio_platform_data pb44_i2c_gpio_data = {
  37         .sda_pin        = PB44_GPIO_I2C_SDA,
  38         .scl_pin        = PB44_GPIO_I2C_SCL,
  39 };
  40
  41 static struct platform_device pb44_i2c_gpio_device = {
  42         .name           = "i2c-gpio",
  43         .id             = 0,
  44         .dev = {
  45                 .platform_data  = &pb44_i2c_gpio_data,
  46         }
  47 };
  48
  49 static struct pcf857x_platform_data pb44_pcf857x_data = {
  50         .gpio_base      = PB44_GPIO_EXP_BASE,
  51 };
  52
  53 static struct i2c_board_info pb44_i2c_board_info[] __initdata = {
  54         {
  55                 I2C_BOARD_INFO("pcf8575", 0x20),
  56                 .platform_data  = &pb44_pcf857x_data,
  57         },
  58 };
  59
  60 static struct gpio_led pb44_leds_gpio[] __initdata = {
  61         {
  62                 .name           = "pb44:amber:jump1",
  63                 .gpio           = PB44_GPIO_LED_JUMP1,
  64                 .active_low     = 1,
  65         }, {
  66                 .name           = "pb44:green:jump2",
  67                 .gpio           = PB44_GPIO_LED_JUMP2,
  68                 .active_low     = 1,
  69         },
  70 };
  71
  72 static struct gpio_keys_button pb44_gpio_keys[] __initdata = {
  73         {
  74                 .desc           = "soft_reset",
  75                 .type           = EV_KEY,
  76                 .code           = KEY_RESTART,
  77                 .debounce_interval = PB44_KEYS_DEBOUNCE_INTERVAL,
  78                 .gpio           = PB44_GPIO_SW_RESET,
  79                 .active_low     = 1,
  80         } , {
  81                 .desc           = "jumpstart",
  82                 .type           = EV_KEY,
  83                 .code           = KEY_WPS_BUTTON,
  84                 .debounce_interval = PB44_KEYS_DEBOUNCE_INTERVAL,
  85                 .gpio           = PB44_GPIO_SW_JUMP,
  86                 .active_low     = 1,
  87         }
  88 };
  89
  90 static struct spi_board_info pb44_spi_info[] = {
  91         {
  92                 .bus_num        = 0,
  93                 .chip_select    = 0,
  94                 .max_speed_hz   = 25000000,
  95                 .modalias       = "m25p64",
  96         },
  97 };
  98
  99 static struct ath79_spi_platform_data pb44_spi_data = {
 100         .bus_num                = 0,
 101         .num_chipselect         = 1,
 102 };
 103
 104 static void __init pb44_init(void)
 105 {
 106         i2c_register_board_info(0, pb44_i2c_board_info,
 107                                 ARRAY_SIZE(pb44_i2c_board_info));
 108         platform_device_register(&pb44_i2c_gpio_device);
 109
 110         ath79_register_leds_gpio(-1, ARRAY_SIZE(pb44_leds_gpio),
 111                                  pb44_leds_gpio);
 112         ath79_register_gpio_keys_polled(-1, PB44_KEYS_POLL_INTERVAL,
 113                                         ARRAY_SIZE(pb44_gpio_keys),
 114                                         pb44_gpio_keys);
 115         ath79_register_spi(&pb44_spi_data, pb44_spi_info,
 116                            ARRAY_SIZE(pb44_spi_info));
 117         ath79_register_usb();
 118         ath79_register_pci();
 119 }
 120
 121 MIPS_MACHINE(ATH79_MACH_PB44, "PB44", "Atheros PB44 reference board",
 122              pb44_init);