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/gpio/machine.h>
  15 #include <linux/platform_data/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 gpiod_lookup_table pb44_i2c_gpiod_table = {
  37         .dev_id = "i2c-gpio.0",
  38         .table = {
  39                 GPIO_LOOKUP_IDX("ath79-gpio", PB44_GPIO_I2C_SDA,
  40                                 NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
  41                 GPIO_LOOKUP_IDX("ath79-gpio", PB44_GPIO_I2C_SCL,
  42                                 NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
  43         },
  44 };
  45
  46 static struct platform_device pb44_i2c_gpio_device = {
  47         .name           = "i2c-gpio",
  48         .id             = 0,
  49         .dev = {
  50                 .platform_data  = NULL,
  51         }
  52 };
  53
  54 static struct pcf857x_platform_data pb44_pcf857x_data = {
  55         .gpio_base      = PB44_GPIO_EXP_BASE,
  56 };
  57
  58 static struct i2c_board_info pb44_i2c_board_info[] __initdata = {
  59         {
  60                 I2C_BOARD_INFO("pcf8575", 0x20),
  61                 .platform_data  = &pb44_pcf857x_data,
  62         },
  63 };
  64
  65 static struct gpio_led pb44_leds_gpio[] __initdata = {
  66         {
  67                 .name           = "pb44:amber:jump1",
  68                 .gpio           = PB44_GPIO_LED_JUMP1,
  69                 .active_low     = 1,
  70         }, {
  71                 .name           = "pb44:green:jump2",
  72                 .gpio           = PB44_GPIO_LED_JUMP2,
  73                 .active_low     = 1,
  74         },
  75 };
  76
  77 static struct gpio_keys_button pb44_gpio_keys[] __initdata = {
  78         {
  79                 .desc           = "soft_reset",
  80                 .type           = EV_KEY,
  81                 .code           = KEY_RESTART,
  82                 .debounce_interval = PB44_KEYS_DEBOUNCE_INTERVAL,
  83                 .gpio           = PB44_GPIO_SW_RESET,
  84                 .active_low     = 1,
  85         } , {
  86                 .desc           = "jumpstart",
  87                 .type           = EV_KEY,
  88                 .code           = KEY_WPS_BUTTON,
  89                 .debounce_interval = PB44_KEYS_DEBOUNCE_INTERVAL,
  90                 .gpio           = PB44_GPIO_SW_JUMP,
  91                 .active_low     = 1,
  92         }
  93 };
  94
  95 static struct spi_board_info pb44_spi_info[] = {
  96         {
  97                 .bus_num        = 0,
  98                 .chip_select    = 0,
  99                 .max_speed_hz   = 25000000,
 100                 .modalias       = "m25p64",
 101         },
 102 };
 103
 104 static struct ath79_spi_platform_data pb44_spi_data = {
 105         .bus_num                = 0,
 106         .num_chipselect         = 1,
 107 };
 108
 109 static void __init pb44_init(void)
 110 {
 111         gpiod_add_lookup_table(&pb44_i2c_gpiod_table);
 112         i2c_register_board_info(0, pb44_i2c_board_info,
 113                                 ARRAY_SIZE(pb44_i2c_board_info));
 114         platform_device_register(&pb44_i2c_gpio_device);
 115
 116         ath79_register_leds_gpio(-1, ARRAY_SIZE(pb44_leds_gpio),
 117                                  pb44_leds_gpio);
 118         ath79_register_gpio_keys_polled(-1, PB44_KEYS_POLL_INTERVAL,
 119                                         ARRAY_SIZE(pb44_gpio_keys),
 120                                         pb44_gpio_keys);
 121         ath79_register_spi(&pb44_spi_data, pb44_spi_info,
 122                            ARRAY_SIZE(pb44_spi_info));
 123         ath79_register_usb();
 124         ath79_register_pci();
 125 }
 126
 127 MIPS_MACHINE(ATH79_MACH_PB44, "PB44", "Atheros PB44 reference board",
 128              pb44_init);