#include <linux/err.h>
#include <linux/fb.h>
+#ifdef CONFIG_PMAC_BACKLIGHT
+#include <asm/backlight.h>
+#endif
#if defined(CONFIG_FB) || (defined(CONFIG_FB_MODULE) && \
defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE))
struct fb_event *evdata = data;
/* If we aren't interested in this event, skip it immediately ... */
- if (event != FB_EVENT_BLANK)
+ if (event != FB_EVENT_BLANK && event != FB_EVENT_CONBLANK)
return 0;
bd = container_of(self, struct backlight_device, fb_notif);
- down(&bd->sem);
- if (bd->props)
- if (!bd->props->check_fb ||
- bd->props->check_fb(evdata->info)) {
- bd->props->fb_blank = *(int *)evdata->data;
- if (likely(bd->props && bd->props->update_status))
- bd->props->update_status(bd);
+ 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);
}
- up(&bd->sem);
+ mutex_unlock(&bd->ops_lock);
return 0;
}
static ssize_t backlight_show_power(struct class_device *cdev, char *buf)
{
- int rc = -ENXIO;
struct backlight_device *bd = to_backlight_device(cdev);
- down(&bd->sem);
- if (likely(bd->props))
- rc = sprintf(buf, "%d\n", bd->props->power);
- up(&bd->sem);
-
- 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)
if (size != count)
return -EINVAL;
- down(&bd->sem);
- if (likely(bd->props)) {
+ mutex_lock(&bd->ops_lock);
+ if (bd->ops) {
pr_debug("backlight: set power to %d\n", power);
- bd->props->power = power;
- if (likely(bd->props->update_status))
- bd->props->update_status(bd);
+ bd->props.power = power;
+ backlight_update_status(bd);
rc = count;
}
- up(&bd->sem);
+ 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);
- down(&bd->sem);
- if (likely(bd->props))
- rc = sprintf(buf, "%d\n", bd->props->brightness);
- up(&bd->sem);
-
- 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)
if (size != count)
return -EINVAL;
- down(&bd->sem);
- if (likely(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;
- if (likely(bd->props->update_status))
- bd->props->update_status(bd);
+ bd->props.brightness = brightness;
+ backlight_update_status(bd);
rc = count;
}
}
- up(&bd->sem);
+ 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);
- down(&bd->sem);
- if (likely(bd->props))
- rc = sprintf(buf, "%d\n", bd->props->max_brightness);
- up(&bd->sem);
-
- return rc;
+ return sprintf(buf, "%d\n", bd->props.max_brightness);
}
static ssize_t backlight_show_actual_brightness(struct class_device *cdev,
int rc = -ENXIO;
struct backlight_device *bd = to_backlight_device(cdev);
- down(&bd->sem);
- if (likely(bd->props && bd->props->get_brightness))
- rc = sprintf(buf, "%d\n", bd->props->get_brightness(bd));
- up(&bd->sem);
+ 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;
}
* 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.
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);
- if (unlikely(!new_bd))
+ new_bd = kzalloc(sizeof(struct backlight_device), GFP_KERNEL);
+ if (!new_bd)
return ERR_PTR(-ENOMEM);
- init_MUTEX(&new_bd->sem);
- new_bd->props = bp;
- memset(&new_bd->class_dev, 0, sizeof(new_bd->class_dev));
+ mutex_init(&new_bd->update_lock);
+ 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);
class_set_devdata(&new_bd->class_dev, devdata);
rc = class_device_register(&new_bd->class_dev);
- if (unlikely(rc)) {
-error: kfree(new_bd);
+ if (rc) {
+ kfree(new_bd);
return ERR_PTR(rc);
}
rc = backlight_register_fb(new_bd);
- if (unlikely(rc))
- goto error;
+ if (rc) {
+ class_device_unregister(&new_bd->class_dev);
+ return ERR_PTR(rc);
+ }
+
for (i = 0; i < ARRAY_SIZE(bl_class_device_attributes); i++) {
rc = class_device_create_file(&new_bd->class_dev,
&bl_class_device_attributes[i]);
- if (unlikely(rc)) {
+ if (rc) {
while (--i >= 0)
class_device_remove_file(&new_bd->class_dev,
&bl_class_device_attributes[i]);
}
}
+#ifdef CONFIG_PMAC_BACKLIGHT
+ mutex_lock(&pmac_backlight_mutex);
+ if (!pmac_backlight)
+ pmac_backlight = new_bd;
+ mutex_unlock(&pmac_backlight_mutex);
+#endif
+
return new_bd;
}
EXPORT_SYMBOL(backlight_device_register);
pr_debug("backlight_device_unregister: name=%s\n", bd->class_dev.class_id);
+#ifdef CONFIG_PMAC_BACKLIGHT
+ mutex_lock(&pmac_backlight_mutex);
+ if (pmac_backlight == bd)
+ pmac_backlight = NULL;
+ mutex_unlock(&pmac_backlight_mutex);
+#endif
+
for (i = 0; i < ARRAY_SIZE(bl_class_device_attributes); i++)
class_device_remove_file(&bd->class_dev,
&bl_class_device_attributes[i]);
- down(&bd->sem);
- bd->props = NULL;
- up(&bd->sem);
+ mutex_lock(&bd->ops_lock);
+ bd->ops = NULL;
+ mutex_unlock(&bd->ops_lock);
backlight_unregister_fb(bd);
projects / firefly-linux-kernel-4.4.55.git / blobdiff