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