hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

MIPS: ath79: add common GPIO buttons device 

Almost all boards have one or more push buttons connected to GPIO lines.
This patch adds common code to register a platform_device for them.

The patch also adds support for the buttons on the PB44 board.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
Cc: linux-mips@linux-mips.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/1954/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Gabor Juhos 2011-01-04 21:28:21 +01:00 committed by Ralf Baechle
parent 858f763c1c
commit 3f348c5d1a
5 changed files with 113 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/mips/ath79/Kconfig
View File

@ -5,6 +5,7 @@ menu "Atheros AR71XX/AR724X/AR913X machine selection"
config ATH79_MACH_PB44
bool "Atheros PB44 reference board"
select SOC_AR71XX
select ATH79_DEV_GPIO_BUTTONS
select ATH79_DEV_LEDS_GPIO
help
Say 'Y' here if you want your kernel to support the
@ -21,6 +22,9 @@ config SOC_AR724X
config SOC_AR913X
def_bool n
config ATH79_DEV_GPIO_BUTTONS
def_bool n
config ATH79_DEV_LEDS_GPIO
def_bool n

1
arch/mips/ath79/Makefile
View File

@ -16,6 +16,7 @@ obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
# Devices
#
obj-y += dev-common.o
obj-$(CONFIG_ATH79_DEV_GPIO_BUTTONS) += dev-gpio-buttons.o
obj-$(CONFIG_ATH79_DEV_LEDS_GPIO) += dev-leds-gpio.o
#

58
arch/mips/ath79/dev-gpio-buttons.c Normal file
View File

@ -0,0 +1,58 @@
/*
* Atheros AR71XX/AR724X/AR913X GPIO button support
*
* Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*/
#include "linux/init.h"
#include "linux/slab.h"
#include <linux/platform_device.h>
#include "dev-gpio-buttons.h"
void __init ath79_register_gpio_keys_polled(int id,
unsigned poll_interval,
unsigned nbuttons,
struct gpio_keys_button *buttons)
{
struct platform_device *pdev;
struct gpio_keys_platform_data pdata;
struct gpio_keys_button *p;
int err;
p = kmalloc(nbuttons * sizeof(*p), GFP_KERNEL);
if (!p)
return;
memcpy(p, buttons, nbuttons * sizeof(*p));
pdev = platform_device_alloc("gpio-keys-polled", id);
if (!pdev)
goto err_free_buttons;
memset(&pdata, 0, sizeof(pdata));
pdata.poll_interval = poll_interval;
pdata.nbuttons = nbuttons;
pdata.buttons = p;
err = platform_device_add_data(pdev, &pdata, sizeof(pdata));
if (err)
goto err_put_pdev;
err = platform_device_add(pdev);
if (err)
goto err_put_pdev;
return;
err_put_pdev:
platform_device_put(pdev);
err_free_buttons:
kfree(p);
}

23
arch/mips/ath79/dev-gpio-buttons.h Normal file
View File

@ -0,0 +1,23 @@
/*
* Atheros AR71XX/AR724X/AR913X GPIO button support
*
* Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*/
#ifndef _ATH79_DEV_GPIO_BUTTONS_H
#define _ATH79_DEV_GPIO_BUTTONS_H
#include <linux/input.h>
#include <linux/gpio_keys.h>
void ath79_register_gpio_keys_polled(int id,
unsigned poll_interval,
unsigned nbuttons,
struct gpio_keys_button *buttons);
#endif /* _ATH79_DEV_GPIO_BUTTONS_H */

27
arch/mips/ath79/mach-pb44.c
View File

@ -15,15 +15,21 @@
#include <linux/i2c/pcf857x.h>
#include "machtypes.h"
#include "dev-gpio-buttons.h"
#include "dev-leds-gpio.h"
#define PB44_GPIO_I2C_SCL 0
#define PB44_GPIO_I2C_SDA 1
#define PB44_GPIO_EXP_BASE 16
#define PB44_GPIO_SW_RESET (PB44_GPIO_EXP_BASE + 6)
#define PB44_GPIO_SW_JUMP (PB44_GPIO_EXP_BASE + 8)
#define PB44_GPIO_LED_JUMP1 (PB44_GPIO_EXP_BASE + 9)
#define PB44_GPIO_LED_JUMP2 (PB44_GPIO_EXP_BASE + 10)
#define PB44_KEYS_POLL_INTERVAL 20 /* msecs */
#define PB44_KEYS_DEBOUNCE_INTERVAL (3 * PB44_KEYS_POLL_INTERVAL)
static struct i2c_gpio_platform_data pb44_i2c_gpio_data = {
.sda_pin = PB44_GPIO_I2C_SDA,
.scl_pin = PB44_GPIO_I2C_SCL,
@ -60,6 +66,24 @@ static struct gpio_led pb44_leds_gpio[] __initdata = {
},
};
static struct gpio_keys_button pb44_gpio_keys[] __initdata = {
{
.desc = "soft_reset",
.type = EV_KEY,
.code = KEY_RESTART,
.debounce_interval = PB44_KEYS_DEBOUNCE_INTERVAL,
.gpio = PB44_GPIO_SW_RESET,
.active_low = 1,
} , {
.desc = "jumpstart",
.type = EV_KEY,
.code = KEY_WPS_BUTTON,
.debounce_interval = PB44_KEYS_DEBOUNCE_INTERVAL,
.gpio = PB44_GPIO_SW_JUMP,
.active_low = 1,
}
};
static void __init pb44_init(void)
{
i2c_register_board_info(0, pb44_i2c_board_info,
@ -68,6 +92,9 @@ static void __init pb44_init(void)
ath79_register_leds_gpio(-1, ARRAY_SIZE(pb44_leds_gpio),
pb44_leds_gpio);
ath79_register_gpio_keys_polled(-1, PB44_KEYS_POLL_INTERVAL,
ARRAY_SIZE(pb44_gpio_keys),
pb44_gpio_keys);
}
MIPS_MACHINE(ATH79_MACH_PB44, "PB44", "Atheros PB44 reference board",