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Commit d8fec1fc authored by Gabor Juhos's avatar Gabor Juhos Committed by Ralf Baechle
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MIPS: ath79: add common GPIO LEDs device 



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

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

Signed-off-by: default avatarGabor Juhos <juhosg@openwrt.org>
Signed-off-by: default avatarImre 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/1953/


Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 0cde7228

arch/mips/ath79/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -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_LEDS_GPIO

	help

	  Say 'Y' here if you want your kernel to support the

	  Atheros PB44 reference board.
@@ -20,4 +21,7 @@ config SOC_AR724X 
config SOC_AR913X

	def_bool n



config ATH79_DEV_LEDS_GPIO

	def_bool n



endif

arch/mips/ath79/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -16,6 +16,7 @@ obj-$(CONFIG_EARLY_PRINTK) += early_printk.o 
# Devices

#

obj-y					+= dev-common.o

obj-$(CONFIG_ATH79_DEV_LEDS_GPIO)	+= dev-leds-gpio.o



#

# Machines

arch/mips/ath79/dev-leds-gpio.c

0 → 100644
+56 −0
Original line number Diff line number Diff line 
/*

 *  Atheros AR71XX/AR724X/AR913X common GPIO LEDs 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-leds-gpio.h"



void __init ath79_register_leds_gpio(int id,

				     unsigned num_leds,

				     struct gpio_led *leds)

{

	struct platform_device *pdev;

	struct gpio_led_platform_data pdata;

	struct gpio_led *p;

	int err;



	p = kmalloc(num_leds * sizeof(*p), GFP_KERNEL);

	if (!p)

		return;



	memcpy(p, leds, num_leds * sizeof(*p));



	pdev = platform_device_alloc("leds-gpio", id);

	if (!pdev)

		goto err_free_leds;



	memset(&pdata, 0, sizeof(pdata));

	pdata.num_leds = num_leds;

	pdata.leds = 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_leds:

	kfree(p);

}

arch/mips/ath79/dev-leds-gpio.h

0 → 100644
+21 −0
Original line number Diff line number Diff line 
/*

 *  Atheros AR71XX/AR724X/AR913X common GPIO LEDs 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_LEDS_GPIO_H

#define _ATH79_DEV_LEDS_GPIO_H



#include <linux/leds.h>



void ath79_register_leds_gpio(int id,

			      unsigned num_leds,

			      struct gpio_led *leds);



#endif /* _ATH79_DEV_LEDS_GPIO_H */

arch/mips/ath79/mach-pb44.c

+18 −0
Original line number Diff line number Diff line
@@ -15,11 +15,14 @@ 
#include <linux/i2c/pcf857x.h>



#include "machtypes.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_LED_JUMP1	(PB44_GPIO_EXP_BASE + 9)

#define PB44_GPIO_LED_JUMP2	(PB44_GPIO_EXP_BASE + 10)



static struct i2c_gpio_platform_data pb44_i2c_gpio_data = {

	.sda_pin        = PB44_GPIO_I2C_SDA,
@@ -45,11 +48,26 @@ static struct i2c_board_info pb44_i2c_board_info[] __initdata = { 
	},

};



static struct gpio_led pb44_leds_gpio[] __initdata = {

	{

		.name		= "pb44:amber:jump1",

		.gpio		= PB44_GPIO_LED_JUMP1,

		.active_low	= 1,

	}, {

		.name		= "pb44:green:jump2",

		.gpio		= PB44_GPIO_LED_JUMP2,

		.active_low	= 1,

	},

};



static void __init pb44_init(void)

{

	i2c_register_board_info(0, pb44_i2c_board_info,

				ARRAY_SIZE(pb44_i2c_board_info));

	platform_device_register(&pb44_i2c_gpio_device);



	ath79_register_leds_gpio(-1, ARRAY_SIZE(pb44_leds_gpio),

				 pb44_leds_gpio);

}



MIPS_MACHINE(ATH79_MACH_PB44, "PB44", "Atheros PB44 reference board",