leds: add possibility to remove leds classdevs during suspend/resume

[linux-2.6-omap-h63xx.git] / drivers / leds / led-class.c

diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c
index 3c1711210e38a375f7ec1064c6bd59aeb7d74206..4a938780dfc380e187b058afcd4da96be6cdf3f8 100644 (file)
--- a/drivers/leds/led-class.c
+++ b/drivers/leds/led-class.c
@@ -2,7 +2,7 @@
  * LED Class Core
  *
  * Copyright (C) 2005 John Lenz <lenz@cs.wisc.edu>
- * Copyright (C) 2005-2006 Richard Purdie <rpurdie@openedhand.com>
+ * Copyright (C) 2005-2007 Richard Purdie <rpurdie@openedhand.com>
  *
  * 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
@@ -24,9 +24,10 @@
 
 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 */
@@ -36,10 +37,10 @@ static ssize_t led_brightness_show(struct class_device *dev, char *buf)
        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);
@@ -56,10 +57,9 @@ static ssize_t led_brightness_store(struct class_device *dev,
        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
 
 /**
@@ -93,29 +93,27 @@ int led_classdev_register(struct device *parent, struct led_classdev *led_cdev)
 {
        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;
 
        /* add to the list of leds */
-       write_lock(&leds_list_lock);
+       down_write(&leds_list_lock);
        list_add_tail(&led_cdev->node, &leds_list);
-       write_unlock(&leds_list_lock);
+       up_write(&leds_list_lock);
 
 #ifdef CONFIG_LEDS_TRIGGERS
-       rwlock_init(&led_cdev->trigger_lock);
+       init_rwsem(&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;
 
@@ -123,48 +121,50 @@ int led_classdev_register(struct device *parent, struct led_classdev *led_cdev)
 #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);
 
 /**
- * led_classdev_unregister - unregisters a object of led_properties class.
+ * __led_classdev_unregister - unregisters a object of led_properties class.
  * @led_cdev: the led device to unregister
+ * @suspended: indicates whether system-wide suspend or resume is in progress
  *
  * Unregisters a previously registered via led_classdev_register object.
  */
-void led_classdev_unregister(struct led_classdev *led_cdev)
+void __led_classdev_unregister(struct led_classdev *led_cdev,
+                                     bool suspended)
 {
-       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);
-       write_lock(&led_cdev->trigger_lock);
+       device_remove_file(led_cdev->dev, &dev_attr_trigger);
+       down_write(&led_cdev->trigger_lock);
        if (led_cdev->trigger)
                led_trigger_set(led_cdev, NULL);
-       write_unlock(&led_cdev->trigger_lock);
+       up_write(&led_cdev->trigger_lock);
 #endif
 
-       class_device_unregister(led_cdev->class_dev);
+       if (suspended)
+               device_pm_schedule_removal(led_cdev->dev);
+       else
+               device_unregister(led_cdev->dev);
 
-       write_lock(&leds_list_lock);
+       down_write(&leds_list_lock);
        list_del(&led_cdev->node);
-       write_unlock(&leds_list_lock);
+       up_write(&leds_list_lock);
 }
-EXPORT_SYMBOL_GPL(led_classdev_unregister);
+EXPORT_SYMBOL_GPL(__led_classdev_unregister);
 
 static int __init leds_init(void)
 {