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68a1d31636
Several boards are using the built-in SPI controller of the AR71XX/AR724X/AR913X SoCs. This patch adds common platform_device and helper code to register it. Additionally, the patch registers the SPI bus on the PB44 board. Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Cc: linux-mips@linux-mips.org Cc: Imre Kaloz <kaloz@openwrt.org> Cc: Luis R. Rodriguez <lrodriguez@atheros.com> Cc: Cliff Holden <Cliff.Holden@Atheros.com> Cc: Kathy Giori <Kathy.Giori@Atheros.com> Patchwork: https://patchwork.linux-mips.org/patch/1956/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
119 lines
2.9 KiB
C
119 lines
2.9 KiB
C
/*
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* Atheros PB44 reference board support
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*
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* Copyright (C) 2009-2010 Gabor Juhos <juhosg@openwrt.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*/
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/i2c.h>
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#include <linux/i2c-gpio.h>
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#include <linux/i2c/pcf857x.h>
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#include "machtypes.h"
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#include "dev-gpio-buttons.h"
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#include "dev-leds-gpio.h"
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#include "dev-spi.h"
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#define PB44_GPIO_I2C_SCL 0
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#define PB44_GPIO_I2C_SDA 1
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#define PB44_GPIO_EXP_BASE 16
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#define PB44_GPIO_SW_RESET (PB44_GPIO_EXP_BASE + 6)
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#define PB44_GPIO_SW_JUMP (PB44_GPIO_EXP_BASE + 8)
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#define PB44_GPIO_LED_JUMP1 (PB44_GPIO_EXP_BASE + 9)
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#define PB44_GPIO_LED_JUMP2 (PB44_GPIO_EXP_BASE + 10)
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#define PB44_KEYS_POLL_INTERVAL 20 /* msecs */
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#define PB44_KEYS_DEBOUNCE_INTERVAL (3 * PB44_KEYS_POLL_INTERVAL)
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static struct i2c_gpio_platform_data pb44_i2c_gpio_data = {
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.sda_pin = PB44_GPIO_I2C_SDA,
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.scl_pin = PB44_GPIO_I2C_SCL,
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};
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static struct platform_device pb44_i2c_gpio_device = {
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.name = "i2c-gpio",
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.id = 0,
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.dev = {
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.platform_data = &pb44_i2c_gpio_data,
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}
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};
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static struct pcf857x_platform_data pb44_pcf857x_data = {
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.gpio_base = PB44_GPIO_EXP_BASE,
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};
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static struct i2c_board_info pb44_i2c_board_info[] __initdata = {
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{
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I2C_BOARD_INFO("pcf8575", 0x20),
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.platform_data = &pb44_pcf857x_data,
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},
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};
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static struct gpio_led pb44_leds_gpio[] __initdata = {
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{
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.name = "pb44:amber:jump1",
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.gpio = PB44_GPIO_LED_JUMP1,
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.active_low = 1,
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}, {
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.name = "pb44:green:jump2",
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.gpio = PB44_GPIO_LED_JUMP2,
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.active_low = 1,
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},
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};
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static struct gpio_keys_button pb44_gpio_keys[] __initdata = {
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{
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.desc = "soft_reset",
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.type = EV_KEY,
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.code = KEY_RESTART,
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.debounce_interval = PB44_KEYS_DEBOUNCE_INTERVAL,
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.gpio = PB44_GPIO_SW_RESET,
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.active_low = 1,
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} , {
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.desc = "jumpstart",
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.type = EV_KEY,
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.code = KEY_WPS_BUTTON,
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.debounce_interval = PB44_KEYS_DEBOUNCE_INTERVAL,
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.gpio = PB44_GPIO_SW_JUMP,
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.active_low = 1,
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}
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};
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static struct spi_board_info pb44_spi_info[] = {
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{
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.bus_num = 0,
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.chip_select = 0,
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.max_speed_hz = 25000000,
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.modalias = "m25p64",
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},
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};
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static struct ath79_spi_platform_data pb44_spi_data = {
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.bus_num = 0,
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.num_chipselect = 1,
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};
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static void __init pb44_init(void)
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{
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i2c_register_board_info(0, pb44_i2c_board_info,
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ARRAY_SIZE(pb44_i2c_board_info));
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platform_device_register(&pb44_i2c_gpio_device);
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ath79_register_leds_gpio(-1, ARRAY_SIZE(pb44_leds_gpio),
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pb44_leds_gpio);
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ath79_register_gpio_keys_polled(-1, PB44_KEYS_POLL_INTERVAL,
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ARRAY_SIZE(pb44_gpio_keys),
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pb44_gpio_keys);
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ath79_register_spi(&pb44_spi_data, pb44_spi_info,
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ARRAY_SIZE(pb44_spi_info));
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}
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MIPS_MACHINE(ATH79_MACH_PB44, "PB44", "Atheros PB44 reference board",
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pb44_init);
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