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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.c39
1 files changed, 22 insertions, 17 deletions
diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
index 86e1cdc8e3..a82934694d 100644
--- a/drivers/video/backlight/backlight.c
+++ b/drivers/video/backlight/backlight.c
@@ -98,7 +98,9 @@ static int fb_notifier_callback(struct notifier_block *self,
{
struct backlight_device *bd;
struct fb_event *evdata = data;
- int node = evdata->info->node;
+ struct fb_info *info = evdata->info;
+ struct backlight_device *fb_bd = fb_bl_device(info);
+ int node = info->node;
int fb_blank = 0;
/* If we aren't interested in this event, skip it immediately ... */
@@ -110,7 +112,9 @@ static int fb_notifier_callback(struct notifier_block *self,
if (!bd->ops)
goto out;
- if (bd->ops->check_fb && !bd->ops->check_fb(bd, evdata->info))
+ if (bd->ops->controls_device && !bd->ops->controls_device(bd, info->device))
+ goto out;
+ if (fb_bd && fb_bd != bd)
goto out;
fb_blank = *(int *)evdata->data;
@@ -118,14 +122,12 @@ static int fb_notifier_callback(struct notifier_block *self,
bd->fb_bl_on[node] = true;
if (!bd->use_count++) {
bd->props.state &= ~BL_CORE_FBBLANK;
- bd->props.fb_blank = FB_BLANK_UNBLANK;
backlight_update_status(bd);
}
} else if (fb_blank != FB_BLANK_UNBLANK && bd->fb_bl_on[node]) {
bd->fb_bl_on[node] = false;
if (!(--bd->use_count)) {
bd->props.state |= BL_CORE_FBBLANK;
- bd->props.fb_blank = fb_blank;
backlight_update_status(bd);
}
}
@@ -317,8 +319,6 @@ static ssize_t scale_show(struct device *dev,
}
static DEVICE_ATTR_RO(scale);
-static struct class *backlight_class;
-
#ifdef CONFIG_PM_SLEEP
static int backlight_suspend(struct device *dev)
{
@@ -369,6 +369,12 @@ static struct attribute *bl_device_attrs[] = {
};
ATTRIBUTE_GROUPS(bl_device);
+static const struct class backlight_class = {
+ .name = "backlight",
+ .dev_groups = bl_device_groups,
+ .pm = &backlight_class_dev_pm_ops,
+};
+
/**
* backlight_force_update - tell the backlight subsystem that hardware state
* has changed
@@ -418,7 +424,7 @@ struct backlight_device *backlight_device_register(const char *name,
mutex_init(&new_bd->update_lock);
mutex_init(&new_bd->ops_lock);
- new_bd->dev.class = backlight_class;
+ new_bd->dev.class = &backlight_class;
new_bd->dev.parent = parent;
new_bd->dev.release = bl_device_release;
dev_set_name(&new_bd->dev, "%s", name);
@@ -510,7 +516,7 @@ struct backlight_device *backlight_device_get_by_name(const char *name)
{
struct device *dev;
- dev = class_find_device_by_name(backlight_class, name);
+ dev = class_find_device_by_name(&backlight_class, name);
return dev ? to_backlight_device(dev) : NULL;
}
@@ -678,7 +684,7 @@ struct backlight_device *of_find_backlight_by_node(struct device_node *node)
{
struct device *dev;
- dev = class_find_device(backlight_class, NULL, node, of_parent_match);
+ dev = class_find_device(&backlight_class, NULL, node, of_parent_match);
return dev ? to_backlight_device(dev) : NULL;
}
@@ -746,20 +752,19 @@ EXPORT_SYMBOL(devm_of_find_backlight);
static void __exit backlight_class_exit(void)
{
- class_destroy(backlight_class);
+ class_unregister(&backlight_class);
}
static int __init backlight_class_init(void)
{
- backlight_class = class_create("backlight");
- if (IS_ERR(backlight_class)) {
- pr_warn("Unable to create backlight class; errno = %ld\n",
- PTR_ERR(backlight_class));
- return PTR_ERR(backlight_class);
+ int ret;
+
+ ret = class_register(&backlight_class);
+ if (ret) {
+ pr_warn("Unable to create backlight class; errno = %d\n", ret);
+ return ret;
}
- backlight_class->dev_groups = bl_device_groups;
- backlight_class->pm = &backlight_class_dev_pm_ops;
INIT_LIST_HEAD(&backlight_dev_list);
mutex_init(&backlight_dev_list_mutex);
BLOCKING_INIT_NOTIFIER_HEAD(&backlight_notifier);