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path: root/drivers/video/backlight/backlight.c
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Diffstat (limited to 'drivers/video/backlight/backlight.c')
-rw-r--r--drivers/video/backlight/backlight.c79
1 files changed, 30 insertions, 49 deletions
diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
index 822a373d334..c65e81ff357 100644
--- 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);