tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
34static 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
39static 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
47static struct pcf857x_platform_data pb44_pcf857x_data = {
48 .gpio_base = PB44_GPIO_EXP_BASE,
49};
50
51static 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
58static 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
70static 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
88static 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
97static struct ath79_spi_platform_data pb44_spi_data = {
98 .bus_num = 0,
99 .num_chipselect = 1,
100};
101
102static 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
117MIPS_MACHINE(ATH79_MACH_PB44, "PB44", "Atheros PB44 reference board",
118 pb44_init);