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: 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/1953/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

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: 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/1953/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Gabor Juhos · Ralf Baechle
1 parent 0cde72284c
Showing 5 changed files with 100 additions and 0 deletions Side-by-side Diff
arch/mips/ath79/Kconfig
arch/mips/ath79/Makefile
arch/mips/ath79/dev-leds-gpio.c
arch/mips/ath79/dev-leds-gpio.h
arch/mips/ath79/mach-pb44.c
@@ -5,6 +5,7 @@
 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.
@@ -18,6 +19,9 @@
 	def_bool n
  
 config SOC_AR913X
+	def_bool n
+
+config ATH79_DEV_LEDS_GPIO
 	def_bool n
  
 endif
@@ -16,6 +16,7 @@
 # Devices
 #
 obj-y					+= dev-common.o
+obj-$(CONFIG_ATH79_DEV_LEDS_GPIO)	+= dev-leds-gpio.o
  
 #
 # Machines
+/*
+ *  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);
+}
+/*
+ *  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 */
@@ -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 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",
...	...	@@ -5,6 +5,7 @@
5	5	config ATH79_MACH_PB44
6	6	bool "Atheros PB44 reference board"
7	7	select SOC_AR71XX
	8	+ select ATH79_DEV_LEDS_GPIO
8	9	help
9	10	Say 'Y' here if you want your kernel to support the
10	11	Atheros PB44 reference board.
...	...	@@ -18,6 +19,9 @@
18	19	def_bool n
19	20
20	21	config SOC_AR913X
	22	+ def_bool n
	23	+
	24	+config ATH79_DEV_LEDS_GPIO
21	25	def_bool n
22	26
23	27	endif
...	...	@@ -16,6 +16,7 @@
16	16	# Devices
17	17	#
18	18	obj-y += dev-common.o
	19	+obj-$(CONFIG_ATH79_DEV_LEDS_GPIO) += dev-leds-gpio.o
19	20
20	21	#
21	22	# Machines
	1	+/*
	2	+ * Atheros AR71XX/AR724X/AR913X common GPIO LEDs support
	3	+ *
	4	+ * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
	5	+ * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
	6	+ *
	7	+ * This program is free software; you can redistribute it and/or modify it
	8	+ * under the terms of the GNU General Public License version 2 as published
	9	+ * by the Free Software Foundation.
	10	+ */
	11	+
	12	+#include <linux/init.h>
	13	+#include <linux/slab.h>
	14	+#include <linux/platform_device.h>
	15	+
	16	+#include "dev-leds-gpio.h"
	17	+
	18	+void __init ath79_register_leds_gpio(int id,
	19	+ unsigned num_leds,
	20	+ struct gpio_led *leds)
	21	+{
	22	+ struct platform_device *pdev;
	23	+ struct gpio_led_platform_data pdata;
	24	+ struct gpio_led *p;
	25	+ int err;
	26	+
	27	+ p = kmalloc(num_leds * sizeof(*p), GFP_KERNEL);
	28	+ if (!p)
	29	+ return;
	30	+
	31	+ memcpy(p, leds, num_leds * sizeof(*p));
	32	+
	33	+ pdev = platform_device_alloc("leds-gpio", id);
	34	+ if (!pdev)
	35	+ goto err_free_leds;
	36	+
	37	+ memset(&pdata, 0, sizeof(pdata));
	38	+ pdata.num_leds = num_leds;
	39	+ pdata.leds = p;
	40	+
	41	+ err = platform_device_add_data(pdev, &pdata, sizeof(pdata));
	42	+ if (err)
	43	+ goto err_put_pdev;
	44	+
	45	+ err = platform_device_add(pdev);
	46	+ if (err)
	47	+ goto err_put_pdev;
	48	+
	49	+ return;
	50	+
	51	+err_put_pdev:
	52	+ platform_device_put(pdev);
	53	+
	54	+err_free_leds:
	55	+ kfree(p);
	56	+}
...	...	@@ -15,11 +15,14 @@
15	15	#include <linux/i2c/pcf857x.h>
16	16
17	17	#include "machtypes.h"
	18	+#include "dev-leds-gpio.h"
18	19
19	20	#define PB44_GPIO_I2C_SCL 0
20	21	#define PB44_GPIO_I2C_SDA 1
21	22
22	23	#define PB44_GPIO_EXP_BASE 16
	24	+#define PB44_GPIO_LED_JUMP1 (PB44_GPIO_EXP_BASE + 9)
	25	+#define PB44_GPIO_LED_JUMP2 (PB44_GPIO_EXP_BASE + 10)
23	26
24	27	static struct i2c_gpio_platform_data pb44_i2c_gpio_data = {
25	28	.sda_pin = PB44_GPIO_I2C_SDA,
26	29
...	...	@@ -45,11 +48,26 @@
45	48	},
46	49	};
47	50
	51	+static struct gpio_led pb44_leds_gpio[] __initdata = {
	52	+ {
	53	+ .name = "pb44:amber:jump1",
	54	+ .gpio = PB44_GPIO_LED_JUMP1,
	55	+ .active_low = 1,
	56	+ }, {
	57	+ .name = "pb44:green:jump2",
	58	+ .gpio = PB44_GPIO_LED_JUMP2,
	59	+ .active_low = 1,
	60	+ },
	61	+};
	62	+
48	63	static void __init pb44_init(void)
49	64	{
50	65	i2c_register_board_info(0, pb44_i2c_board_info,
51	66	ARRAY_SIZE(pb44_i2c_board_info));
52	67	platform_device_register(&pb44_i2c_gpio_device);
	68	+
	69	+ ath79_register_leds_gpio(-1, ARRAY_SIZE(pb44_leds_gpio),
	70	+ pb44_leds_gpio);
53	71	}
54	72
55	73	MIPS_MACHINE(ATH79_MACH_PB44, "PB44", "Atheros PB44 reference board",