Merge branch 'for-linus' of git://git.o-hand.com/linux-rpurdie-leds

* 'for-linus' of git://git.o-hand.com/linux-rpurdie-leds:
leds: Convert from struct class_device to struct device
leds: leds-gpio for ngw100
leds: Add warning printks in error paths
leds: Fix trigger unregister_simple if register_simple fails
leds: Use menuconfig objects II - LED
leds: Teach leds-gpio to handle timer-unsafe GPIOs
leds: Add generic GPIO LED driver

arch/avr32/boards/atngw100/setup.c

···
 #include <linux/linkage.h>
 #include <linux/platform_device.h>
 #include <linux/types.h>
+#include <linux/leds.h>
 #include <linux/spi/spi.h>
 
 #include <asm/io.h>
···
 #include <asm/arch/at32ap7000.h>
 #include <asm/arch/board.h>
 #include <asm/arch/init.h>
+#include <asm/arch/portmux.h>
 
 /* Initialized by bootloader-specific startup code. */
 struct tag *bootloader_tags __initdata;
···
 	at32_setup_serial_console(0);
 }
 
+static const struct gpio_led ngw_leds[] = {
+	{ .name = "sys", .gpio = GPIO_PIN_PA(16), .active_low = 1,
+		.default_trigger = "heartbeat",
+	},
+	{ .name = "a", .gpio = GPIO_PIN_PA(19), .active_low = 1, },
+	{ .name = "b", .gpio = GPIO_PIN_PE(19), .active_low = 1, },
+};
+
+static const struct gpio_led_platform_data ngw_led_data = {
+	.num_leds =	ARRAY_SIZE(ngw_leds),
+	.leds =		(void *) ngw_leds,
+};
+
+static struct platform_device ngw_gpio_leds = {
+	.name =		"leds-gpio",
+	.id =		-1,
+	.dev = {
+		.platform_data = (void *) &ngw_led_data,
+	}
+};
+
 static int __init atngw100_init(void)
 {
+	unsigned	i;
+
 	/*
 	 * ATNGW100 uses 16-bit SDRAM interface, so we don't need to
 	 * reserve any pins for it.
···
 	set_hw_addr(at32_add_device_eth(1, &eth_data[1]));
 
 	at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
+
+	for (i = 0; i < ARRAY_SIZE(ngw_leds); i++) {
+		at32_select_gpio(ngw_leds[i].gpio,
+				AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
+	}
+	platform_device_register(&ngw_gpio_leds);
 
 	return 0;
 }

arch/avr32/configs/atngw100_defconfig

···
 #
 # LED devices
 #
-# CONFIG_NEW_LEDS is not set
+CONFIG_NEW_LEDS=y
+CONFIG_LEDS_CLASS=y
+
+#
+# LED drivers
+#
+CONFIG_LEDS_GPIO=y
+
+#
+# LED Triggers
+#
+CONFIG_LEDS_TRIGGERS=y
+CONFIG_LEDS_TRIGGER_TIMER=y
+CONFIG_LEDS_TRIGGER_HEARTBEAT=y
+
 
 #
 # LED drivers

drivers/leds/Kconfig

···
-
-menu "LED devices"
-	depends on HAS_IOMEM
-
-config NEW_LEDS
+menuconfig NEW_LEDS
 	bool "LED Support"
+	depends on HAS_IOMEM
 	help
 	  Say Y to enable Linux LED support.  This allows control of supported
 	  LEDs from both userspace and optionally, by kernel events (triggers).
···
 	  This is not related to standard keyboard LEDs which are controlled
 	  via the input system.
 
+if NEW_LEDS
+
 config LEDS_CLASS
 	tristate "LED Class Support"
-	depends on NEW_LEDS
 	help
 	  This option enables the led sysfs class in /sys/class/leds.  You'll
 	  need this to do anything useful with LEDs.  If unsure, say N.
···
 	help
 	  This option enables support for the front LED on Cobalt Server
 
+config LEDS_GPIO
+	tristate "LED Support for GPIO connected LEDs"
+	depends on LEDS_CLASS && GENERIC_GPIO
+	help
+	  This option enables support for the LEDs connected to GPIO
+	  outputs. To be useful the particular board must have LEDs
+	  and they must be connected to the GPIO lines.
+
 comment "LED Triggers"
 
 config LEDS_TRIGGERS
 	bool "LED Trigger support"
-	depends on NEW_LEDS
 	help
 	  This option enables trigger support for the leds class.
 	  These triggers allow kernel events to drive the LEDs and can
···
 	  load average.
 	  If unsure, say Y.
 
-endmenu
-
+endif # NEW_LEDS

drivers/leds/Makefile

···
 obj-$(CONFIG_LEDS_WRAP)			+= leds-wrap.o
 obj-$(CONFIG_LEDS_H1940)		+= leds-h1940.o
 obj-$(CONFIG_LEDS_COBALT)		+= leds-cobalt.o
+obj-$(CONFIG_LEDS_GPIO)			+= leds-gpio.o
 
 # LED Triggers
 obj-$(CONFIG_LEDS_TRIGGER_TIMER)	+= ledtrig-timer.o

drivers/leds/led-class.c

···
  * LED Class Core
  *
  * Copyright (C) 2005 John Lenz <[e-mail]>
- * Copyright (C) 2005-2006 Richard Purdie <[e-mail]>
+ * Copyright (C) 2005-2007 Richard Purdie <[e-mail]>
  *
  * 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
···
 
 static struct class *leds_class;
 
-static ssize_t led_brightness_show(struct class_device *dev, char *buf)
+static ssize_t led_brightness_show(struct device *dev, 
+		struct device_attribute *attr, char *buf)
 {
-	struct led_classdev *led_cdev = class_get_devdata(dev);
+	struct led_classdev *led_cdev = dev_get_drvdata(dev);
 	ssize_t ret = 0;
 
 	/* no lock needed for this */
···
 	return ret;
 }
 
-static ssize_t led_brightness_store(struct class_device *dev,
-				const char *buf, size_t size)
+static ssize_t led_brightness_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t size)
 {
-	struct led_classdev *led_cdev = class_get_devdata(dev);
+	struct led_classdev *led_cdev = dev_get_drvdata(dev);
 	ssize_t ret = -EINVAL;
 	char *after;
 	unsigned long state = simple_strtoul(buf, &after, 10);
···
 	return ret;
 }
 
-static CLASS_DEVICE_ATTR(brightness, 0644, led_brightness_show,
-			led_brightness_store);
+static DEVICE_ATTR(brightness, 0644, led_brightness_show, led_brightness_store);
 #ifdef CONFIG_LEDS_TRIGGERS
-static CLASS_DEVICE_ATTR(trigger, 0644, led_trigger_show, led_trigger_store);
+static DEVICE_ATTR(trigger, 0644, led_trigger_show, led_trigger_store);
 #endif
 
 /**
···
 {
 	int rc;
 
-	led_cdev->class_dev = class_device_create(leds_class, NULL, 0,
-						parent, "%s", led_cdev->name);
-	if (unlikely(IS_ERR(led_cdev->class_dev)))
-		return PTR_ERR(led_cdev->class_dev);
+	led_cdev->dev = device_create(leds_class, parent, 0, "%s",
+					    led_cdev->name);
+	if (unlikely(IS_ERR(led_cdev->dev)))
+		return PTR_ERR(led_cdev->dev);
 
-	class_set_devdata(led_cdev->class_dev, led_cdev);
+	dev_set_drvdata(led_cdev->dev, led_cdev);
 
 	/* register the attributes */
-	rc = class_device_create_file(led_cdev->class_dev,
-				      &class_device_attr_brightness);
+	rc = device_create_file(led_cdev->dev, &dev_attr_brightness);
 	if (rc)
 		goto err_out;
 
···
 #ifdef CONFIG_LEDS_TRIGGERS
 	rwlock_init(&led_cdev->trigger_lock);
 
-	rc = class_device_create_file(led_cdev->class_dev,
-				      &class_device_attr_trigger);
+	rc = device_create_file(led_cdev->dev, &dev_attr_trigger);
 	if (rc)
 		goto err_out_led_list;
 
···
 #endif
 
 	printk(KERN_INFO "Registered led device: %s\n",
-			led_cdev->class_dev->class_id);
+			led_cdev->name);
 
 	return 0;
 
 #ifdef CONFIG_LEDS_TRIGGERS
 err_out_led_list:
-	class_device_remove_file(led_cdev->class_dev,
-				&class_device_attr_brightness);
+	device_remove_file(led_cdev->dev, &dev_attr_brightness);
 	list_del(&led_cdev->node);
 #endif
 err_out:
-	class_device_unregister(led_cdev->class_dev);
+	device_unregister(led_cdev->dev);
 	return rc;
 }
 EXPORT_SYMBOL_GPL(led_classdev_register);
···
  */
 void led_classdev_unregister(struct led_classdev *led_cdev)
 {
-	class_device_remove_file(led_cdev->class_dev,
-				&class_device_attr_brightness);
+	device_remove_file(led_cdev->dev, &dev_attr_brightness);
 #ifdef CONFIG_LEDS_TRIGGERS
-	class_device_remove_file(led_cdev->class_dev,
-				&class_device_attr_trigger);
+	device_remove_file(led_cdev->dev, &dev_attr_trigger);
 	write_lock(&led_cdev->trigger_lock);
 	if (led_cdev->trigger)
 		led_trigger_set(led_cdev, NULL);
 	write_unlock(&led_cdev->trigger_lock);
 #endif
 
-	class_device_unregister(led_cdev->class_dev);
+	device_unregister(led_cdev->dev);
 
 	write_lock(&leds_list_lock);
 	list_del(&led_cdev->node);

drivers/leds/led-triggers.c

···
 /*
  * LED Triggers Core
  *
- * Copyright 2005-2006 Openedhand Ltd.
+ * Copyright 2005-2007 Openedhand Ltd.
  *
  * Author: Richard Purdie <[e-mail]>
  *
···
 static DEFINE_RWLOCK(triggers_list_lock);
 static LIST_HEAD(trigger_list);
 
-ssize_t led_trigger_store(struct class_device *dev, const char *buf,
-			size_t count)
+ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr,
+		const char *buf, size_t count)
 {
-	struct led_classdev *led_cdev = class_get_devdata(dev);
+	struct led_classdev *led_cdev = dev_get_drvdata(dev);
 	char trigger_name[TRIG_NAME_MAX];
 	struct led_trigger *trig;
 	size_t len;
···
 }
 
 
-ssize_t led_trigger_show(struct class_device *dev, char *buf)
+ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr,
+		char *buf)
 {
-	struct led_classdev *led_cdev = class_get_devdata(dev);
+	struct led_classdev *led_cdev = dev_get_drvdata(dev);
 	struct led_trigger *trig;
 	int len = 0;
 
···
 void led_trigger_register_simple(const char *name, struct led_trigger **tp)
 {
 	struct led_trigger *trigger;
+	int err;
 
 	trigger = kzalloc(sizeof(struct led_trigger), GFP_KERNEL);
 
 	if (trigger) {
 		trigger->name = name;
-		led_trigger_register(trigger);
-	}
+		err = led_trigger_register(trigger);
+		if (err < 0)
+			printk(KERN_WARNING "LED trigger %s failed to register"
+				" (%d)\n", name, err);
+	} else
+		printk(KERN_WARNING "LED trigger %s failed to register"
+			" (no memory)\n", name);
+
 	*tp = trigger;
 }
 
···
 
 void led_trigger_unregister_simple(struct led_trigger *trigger)
 {
-	led_trigger_unregister(trigger);
+	if (trigger)
+		led_trigger_unregister(trigger);
 	kfree(trigger);
 }
 

drivers/leds/leds-gpio.c

···
+/*
+ * LEDs driver for GPIOs
+ *
+ * Copyright (C) 2007 8D Technologies inc.
+ * Raphael Assenat <[e-mail]>
+ *
+ * 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/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+#include <linux/workqueue.h>
+
+#include <asm/gpio.h>
+
+struct gpio_led_data {
+	struct led_classdev cdev;
+	unsigned gpio;
+	struct work_struct work;
+	u8 new_level;
+	u8 can_sleep;
+	u8 active_low;
+};
+
+static void gpio_led_work(struct work_struct *work)
+{
+	struct gpio_led_data	*led_dat =
+		container_of(work, struct gpio_led_data, work);
+
+	gpio_set_value_cansleep(led_dat->gpio, led_dat->new_level);
+}
+
+static void gpio_led_set(struct led_classdev *led_cdev,
+	enum led_brightness value)
+{
+	struct gpio_led_data *led_dat =
+		container_of(led_cdev, struct gpio_led_data, cdev);
+	int level;
+
+	if (value == LED_OFF)
+		level = 0;
+	else
+		level = 1;
+
+	if (led_dat->active_low)
+		level = !level;
+
+	/* setting GPIOs with I2C/etc requires a preemptible task context */
+	if (led_dat->can_sleep) {
+		if (preempt_count()) {
+			led_dat->new_level = level;
+			schedule_work(&led_dat->work);
+		} else
+			gpio_set_value_cansleep(led_dat->gpio, level);
+	} else
+		gpio_set_value(led_dat->gpio, level);
+}
+
+static int __init gpio_led_probe(struct platform_device *pdev)
+{
+	struct gpio_led_platform_data *pdata = pdev->dev.platform_data;
+	struct gpio_led *cur_led;
+	struct gpio_led_data *leds_data, *led_dat;
+	int i, ret = 0;
+
+	if (!pdata)
+		return -EBUSY;
+
+	leds_data = kzalloc(sizeof(struct gpio_led_data) * pdata->num_leds,
+				GFP_KERNEL);
+	if (!leds_data)
+		return -ENOMEM;
+
+	for (i = 0; i < pdata->num_leds; i++) {
+		cur_led = &pdata->leds[i];
+		led_dat = &leds_data[i];
+
+		led_dat->cdev.name = cur_led->name;
+		led_dat->cdev.default_trigger = cur_led->default_trigger;
+		led_dat->gpio = cur_led->gpio;
+		led_dat->can_sleep = gpio_cansleep(cur_led->gpio);
+		led_dat->active_low = cur_led->active_low;
+		led_dat->cdev.brightness_set = gpio_led_set;
+		led_dat->cdev.brightness = cur_led->active_low ? LED_FULL : LED_OFF;
+
+		ret = gpio_request(led_dat->gpio, led_dat->cdev.name);
+		if (ret < 0)
+			goto err;
+
+		gpio_direction_output(led_dat->gpio, led_dat->active_low);
+
+		ret = led_classdev_register(&pdev->dev, &led_dat->cdev);
+		if (ret < 0) {
+			gpio_free(led_dat->gpio);
+			goto err;
+		}
+
+		INIT_WORK(&led_dat->work, gpio_led_work);
+	}
+
+	platform_set_drvdata(pdev, leds_data);
+
+	return 0;
+
+err:
+	if (i > 0) {
+		for (i = i - 1; i >= 0; i--) {
+			led_classdev_unregister(&leds_data[i].cdev);
+			gpio_free(leds_data[i].gpio);
+		}
+	}
+
+	flush_scheduled_work();
+	kfree(leds_data);
+
+	return ret;
+}
+
+static int __exit gpio_led_remove(struct platform_device *pdev)
+{
+	int i;
+	struct gpio_led_platform_data *pdata = pdev->dev.platform_data;
+	struct gpio_led_data *leds_data;
+
+	leds_data = platform_get_drvdata(pdev);
+
+	for (i = 0; i < pdata->num_leds; i++) {
+		led_classdev_unregister(&leds_data[i].cdev);
+		gpio_free(leds_data[i].gpio);
+	}
+	
+	kfree(leds_data);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int gpio_led_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	struct gpio_led_platform_data *pdata = pdev->dev.platform_data;
+	struct gpio_led_data *leds_data;
+	int i;
+	
+	leds_data = platform_get_drvdata(pdev);
+
+	for (i = 0; i < pdata->num_leds; i++)
+		led_classdev_suspend(&leds_data[i].cdev);
+
+	return 0;
+}
+
+static int gpio_led_resume(struct platform_device *pdev)
+{
+	struct gpio_led_platform_data *pdata = pdev->dev.platform_data;
+	struct gpio_led_data *leds_data;
+	int i;
+
+	leds_data = platform_get_drvdata(pdev);
+
+	for (i = 0; i < pdata->num_leds; i++)
+		led_classdev_resume(&leds_data[i].cdev);
+
+	return 0;
+}
+#else
+#define gpio_led_suspend NULL
+#define gpio_led_resume NULL
+#endif
+
+static struct platform_driver gpio_led_driver = {
+	.remove		= __exit_p(gpio_led_remove),
+	.suspend	= gpio_led_suspend,
+	.resume		= gpio_led_resume,
+	.driver		= {
+		.name	= "leds-gpio",
+		.owner	= THIS_MODULE,
+	},
+};
+
+static int __init gpio_led_init(void)
+{
+	return platform_driver_probe(&gpio_led_driver, gpio_led_probe);
+}
+
+static void __exit gpio_led_exit(void)
+{
+	platform_driver_unregister(&gpio_led_driver);
+}
+
+module_init(gpio_led_init);
+module_exit(gpio_led_exit);
+
+MODULE_AUTHOR("Raphael Assenat <[e-mail]>");
+MODULE_DESCRIPTION("GPIO LED driver");
+MODULE_LICENSE("GPL");

drivers/leds/leds-locomo.c

···
 static void locomoled_brightness_set(struct led_classdev *led_cdev,
 				enum led_brightness value, int offset)
 {
-	struct locomo_dev *locomo_dev = LOCOMO_DEV(led_cdev->class_dev->dev);
+	struct locomo_dev *locomo_dev = LOCOMO_DEV(led_cdev->dev);
 	unsigned long flags;
 
 	local_irq_save(flags);

drivers/leds/leds.h

···
 #ifndef __LEDS_H_INCLUDED
 #define __LEDS_H_INCLUDED
 
+#include <linux/device.h>
 #include <linux/leds.h>
 
 static inline void led_set_brightness(struct led_classdev *led_cdev,
···
 #define led_trigger_set(x, y) do {} while(0)
 #endif
 
-ssize_t led_trigger_store(struct class_device *dev, const char *buf,
-			size_t count);
-ssize_t led_trigger_show(struct class_device *dev, char *buf);
+ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr,
+			const char *buf, size_t count);
+ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr,
+			char *buf);
 
 #endif	/* __LEDS_H_INCLUDED */

drivers/leds/ledtrig-timer.c

···
 	mod_timer(&timer_data->timer, jiffies + msecs_to_jiffies(delay));
 }
 
-static ssize_t led_delay_on_show(struct class_device *dev, char *buf)
+static ssize_t led_delay_on_show(struct device *dev, 
+		struct device_attribute *attr, char *buf)
 {
-	struct led_classdev *led_cdev = class_get_devdata(dev);
+	struct led_classdev *led_cdev = dev_get_drvdata(dev);
 	struct timer_trig_data *timer_data = led_cdev->trigger_data;
 
 	sprintf(buf, "%lu\n", timer_data->delay_on);
···
 	return strlen(buf) + 1;
 }
 
-static ssize_t led_delay_on_store(struct class_device *dev, const char *buf,
-				size_t size)
+static ssize_t led_delay_on_store(struct device *dev, 
+		struct device_attribute *attr, const char *buf, size_t size)
 {
-	struct led_classdev *led_cdev = class_get_devdata(dev);
+	struct led_classdev *led_cdev = dev_get_drvdata(dev);
 	struct timer_trig_data *timer_data = led_cdev->trigger_data;
 	int ret = -EINVAL;
 	char *after;
···
 	return ret;
 }
 
-static ssize_t led_delay_off_show(struct class_device *dev, char *buf)
+static ssize_t led_delay_off_show(struct device *dev, 
+		struct device_attribute *attr, char *buf)
 {
-	struct led_classdev *led_cdev = class_get_devdata(dev);
+	struct led_classdev *led_cdev = dev_get_drvdata(dev);
 	struct timer_trig_data *timer_data = led_cdev->trigger_data;
 
 	sprintf(buf, "%lu\n", timer_data->delay_off);
···
 	return strlen(buf) + 1;
 }
 
-static ssize_t led_delay_off_store(struct class_device *dev, const char *buf,
-				size_t size)
+static ssize_t led_delay_off_store(struct device *dev, 
+		struct device_attribute *attr, const char *buf, size_t size)
 {
-	struct led_classdev *led_cdev = class_get_devdata(dev);
+	struct led_classdev *led_cdev = dev_get_drvdata(dev);
 	struct timer_trig_data *timer_data = led_cdev->trigger_data;
 	int ret = -EINVAL;
 	char *after;
···
 	return ret;
 }
 
-static CLASS_DEVICE_ATTR(delay_on, 0644, led_delay_on_show,
-			led_delay_on_store);
-static CLASS_DEVICE_ATTR(delay_off, 0644, led_delay_off_show,
-			led_delay_off_store);
+static DEVICE_ATTR(delay_on, 0644, led_delay_on_show, led_delay_on_store);
+static DEVICE_ATTR(delay_off, 0644, led_delay_off_show, led_delay_off_store);
 
 static void timer_trig_activate(struct led_classdev *led_cdev)
 {
···
 	timer_data->timer.function = led_timer_function;
 	timer_data->timer.data = (unsigned long) led_cdev;
 
-	rc = class_device_create_file(led_cdev->class_dev,
-				&class_device_attr_delay_on);
-	if (rc) goto err_out;
-	rc = class_device_create_file(led_cdev->class_dev,
-				&class_device_attr_delay_off);
-	if (rc) goto err_out_delayon;
+	rc = device_create_file(led_cdev->dev, &dev_attr_delay_on);
+	if (rc)
+		goto err_out;
+	rc = device_create_file(led_cdev->dev, &dev_attr_delay_off);
+	if (rc)
+		goto err_out_delayon;
 
 	return;
 
 err_out_delayon:
-	class_device_remove_file(led_cdev->class_dev,
-				&class_device_attr_delay_on);
+	device_remove_file(led_cdev->dev, &dev_attr_delay_on);
 err_out:
 	led_cdev->trigger_data = NULL;
 	kfree(timer_data);
···
 	struct timer_trig_data *timer_data = led_cdev->trigger_data;
 
 	if (timer_data) {
-		class_device_remove_file(led_cdev->class_dev,
-					&class_device_attr_delay_on);
-		class_device_remove_file(led_cdev->class_dev,
-					&class_device_attr_delay_off);
+		device_remove_file(led_cdev->dev, &dev_attr_delay_on);
+		device_remove_file(led_cdev->dev, &dev_attr_delay_off);
 		del_timer_sync(&timer_data->timer);
 		kfree(timer_data);
 	}

include/linux/leds.h

···
 #include <linux/list.h>
 
 struct device;
-struct class_device;
 /*
  * LED Core
  */
···
 	void		(*brightness_set)(struct led_classdev *led_cdev,
 					  enum led_brightness brightness);
 
-	struct class_device	*class_dev;
+	struct device		*dev;
 	struct list_head	 node;			/* LED Device list */
 	char			*default_trigger;	/* Trigger to use */
 
···
 #else
 #define ledtrig_ide_activity() do {} while(0)
 #endif
+
+/* For the leds-gpio driver */
+struct gpio_led {
+	const char *name;
+	char *default_trigger;
+	unsigned 	gpio;
+	u8 		active_low;
+};
+
+struct gpio_led_platform_data {
+	int 		num_leds;
+	struct gpio_led *leds;
+};
+
 
 #endif		/* __LINUX_LEDS_H_INCLUDED */