backlight: Separate backlight properties from backlight ops pointers

[safe/jmp/linux-2.6] / drivers / video / backlight / backlight.c

diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
index 822a373..c65e81f 100644 (file)
--- a/drivers/video/backlight/backlight.c
+++ b/drivers/video/backlight/backlight.c
@@ -35,14 +35,14 @@ static int fb_notifier_callback(struct notifier_block *self,
                return 0;
 
        bd = container_of(self, struct backlight_device, fb_notif);
-       mutex_lock(&bd->props_lock);
-       if (bd->props)
-               if (!bd->props->check_fb ||
-                   bd->props->check_fb(evdata->info)) {
-                       bd->props->fb_blank = *(int *)evdata->data;
+       mutex_lock(&bd->ops_lock);
+       if (bd->ops)
+               if (!bd->ops->check_fb ||
+                   bd->ops->check_fb(evdata->info)) {
+                       bd->props.fb_blank = *(int *)evdata->data;
                        backlight_update_status(bd);
                }
-       mutex_unlock(&bd->props_lock);
+       mutex_unlock(&bd->ops_lock);
        return 0;
 }
 
@@ -71,15 +71,9 @@ static inline void backlight_unregister_fb(struct backlight_device *bd)
 
 static ssize_t backlight_show_power(struct class_device *cdev, char *buf)
 {
-       int rc = -ENXIO;
        struct backlight_device *bd = to_backlight_device(cdev);
 
-       mutex_lock(&bd->props_lock);
-       if (bd->props)
-               rc = sprintf(buf, "%d\n", bd->props->power);
-       mutex_unlock(&bd->props_lock);
-
-       return rc;
+       return sprintf(buf, "%d\n", bd->props.power);
 }
 
 static ssize_t backlight_store_power(struct class_device *cdev, const char *buf, size_t count)
@@ -95,29 +89,23 @@ static ssize_t backlight_store_power(struct class_device *cdev, const char *buf,
        if (size != count)
                return -EINVAL;
 
-       mutex_lock(&bd->props_lock);
-       if (bd->props) {
+       mutex_lock(&bd->ops_lock);
+       if (bd->ops) {
                pr_debug("backlight: set power to %d\n", power);
-               bd->props->power = power;
+               bd->props.power = power;
                backlight_update_status(bd);
                rc = count;
        }
-       mutex_unlock(&bd->props_lock);
+       mutex_unlock(&bd->ops_lock);
 
        return rc;
 }
 
 static ssize_t backlight_show_brightness(struct class_device *cdev, char *buf)
 {
-       int rc = -ENXIO;
        struct backlight_device *bd = to_backlight_device(cdev);
 
-       mutex_lock(&bd->props_lock);
-       if (bd->props)
-               rc = sprintf(buf, "%d\n", bd->props->brightness);
-       mutex_unlock(&bd->props_lock);
-
-       return rc;
+       return sprintf(buf, "%d\n", bd->props.brightness);
 }
 
 static ssize_t backlight_store_brightness(struct class_device *cdev, const char *buf, size_t count)
@@ -133,34 +121,28 @@ static ssize_t backlight_store_brightness(struct class_device *cdev, const char
        if (size != count)
                return -EINVAL;
 
-       mutex_lock(&bd->props_lock);
-       if (bd->props) {
-               if (brightness > bd->props->max_brightness)
+       mutex_lock(&bd->ops_lock);
+       if (bd->ops) {
+               if (brightness > bd->props.max_brightness)
                        rc = -EINVAL;
                else {
                        pr_debug("backlight: set brightness to %d\n",
                                 brightness);
-                       bd->props->brightness = brightness;
+                       bd->props.brightness = brightness;
                        backlight_update_status(bd);
                        rc = count;
                }
        }
-       mutex_unlock(&bd->props_lock);
+       mutex_unlock(&bd->ops_lock);
 
        return rc;
 }
 
 static ssize_t backlight_show_max_brightness(struct class_device *cdev, char *buf)
 {
-       int rc = -ENXIO;
        struct backlight_device *bd = to_backlight_device(cdev);
 
-       mutex_lock(&bd->props_lock);
-       if (bd->props)
-               rc = sprintf(buf, "%d\n", bd->props->max_brightness);
-       mutex_unlock(&bd->props_lock);
-
-       return rc;
+       return sprintf(buf, "%d\n", bd->props.max_brightness);
 }
 
 static ssize_t backlight_show_actual_brightness(struct class_device *cdev,
@@ -169,10 +151,10 @@ static ssize_t backlight_show_actual_brightness(struct class_device *cdev,
        int rc = -ENXIO;
        struct backlight_device *bd = to_backlight_device(cdev);
 
-       mutex_lock(&bd->props_lock);
-       if (bd->props && bd->props->get_brightness)
-               rc = sprintf(buf, "%d\n", bd->props->get_brightness(bd));
-       mutex_unlock(&bd->props_lock);
+       mutex_lock(&bd->ops_lock);
+       if (bd->ops && bd->ops->get_brightness)
+               rc = sprintf(buf, "%d\n", bd->ops->get_brightness(bd));
+       mutex_unlock(&bd->ops_lock);
 
        return rc;
 }
@@ -211,7 +193,7 @@ static const struct class_device_attribute bl_class_device_attributes[] = {
  *   respective framebuffer device).
  * @devdata: an optional pointer to be stored in the class_device. The
  *   methods may retrieve it by using class_get_devdata(&bd->class_dev).
- * @bp: the backlight properties structure.
+ * @ops: the backlight operations structure.
  *
  * Creates and registers new backlight class_device. Returns either an
  * ERR_PTR() or a pointer to the newly allocated device.
@@ -219,21 +201,20 @@ static const struct class_device_attribute bl_class_device_attributes[] = {
 struct backlight_device *backlight_device_register(const char *name,
        struct device *dev,
        void *devdata,
-       struct backlight_properties *bp)
+       struct backlight_ops *ops)
 {
        int i, rc;
        struct backlight_device *new_bd;
 
        pr_debug("backlight_device_alloc: name=%s\n", name);
 
-       new_bd = kmalloc(sizeof(struct backlight_device), GFP_KERNEL);
+       new_bd = kzalloc(sizeof(struct backlight_device), GFP_KERNEL);
        if (!new_bd)
                return ERR_PTR(-ENOMEM);
 
        mutex_init(&new_bd->update_lock);
-       mutex_init(&new_bd->props_lock);
-       new_bd->props = bp;
-       memset(&new_bd->class_dev, 0, sizeof(new_bd->class_dev));
+       mutex_init(&new_bd->ops_lock);
+       new_bd->ops = ops;
        new_bd->class_dev.class = &backlight_class;
        new_bd->class_dev.dev = dev;
        strlcpy(new_bd->class_dev.class_id, name, KOBJ_NAME_LEN);
@@ -302,9 +283,9 @@ void backlight_device_unregister(struct backlight_device *bd)
                class_device_remove_file(&bd->class_dev,
                                         &bl_class_device_attributes[i]);
 
-       mutex_lock(&bd->props_lock);
-       bd->props = NULL;
-       mutex_unlock(&bd->props_lock);
+       mutex_lock(&bd->ops_lock);
+       bd->ops = NULL;
+       mutex_unlock(&bd->ops_lock);
 
        backlight_unregister_fb(bd);