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#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
35static 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
40static 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
48static struct pcf857x_platform_data pb44_pcf857x_data = {
49 .gpio_base = PB44_GPIO_EXP_BASE,
50};
51
52static 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
59static 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
71static 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
89static 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
98static struct ath79_spi_platform_data pb44_spi_data = {
99 .bus_num = 0,
100 .num_chipselect = 1,
101};
102
103static 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
119MIPS_MACHINE(ATH79_MACH_PB44, "PB44", "Atheros PB44 reference board",
120 pb44_init);