#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;
+ 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;
}
}
#endif /* CONFIG_FB */
-static ssize_t backlight_show_power(struct class_device *cdev, char *buf)
+static ssize_t backlight_show_power(struct device *dev,
+ struct device_attribute *attr,char *buf)
{
- int rc = -ENXIO;
- struct backlight_device *bd = to_backlight_device(cdev);
-
- down(&bd->sem);
- if (bd->props)
- rc = sprintf(buf, "%d\n", bd->props->power);
- up(&bd->sem);
+ struct backlight_device *bd = to_backlight_device(dev);
- 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)
+static ssize_t backlight_store_power(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
{
int rc = -ENXIO;
char *endp;
- struct backlight_device *bd = to_backlight_device(cdev);
+ struct backlight_device *bd = to_backlight_device(dev);
int power = simple_strtoul(buf, &endp, 0);
size_t size = endp - buf;
if (size != count)
return -EINVAL;
- down(&bd->sem);
- if (bd->props) {
+ mutex_lock(&bd->ops_lock);
+ if (bd->ops) {
pr_debug("backlight: set power to %d\n", power);
- bd->props->power = power;
- backlight_update_status(bd);
+ if (bd->props.power != power) {
+ 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)
+static ssize_t backlight_show_brightness(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
- int rc = -ENXIO;
- struct backlight_device *bd = to_backlight_device(cdev);
-
- down(&bd->sem);
- if (bd->props)
- rc = sprintf(buf, "%d\n", bd->props->brightness);
- up(&bd->sem);
+ struct backlight_device *bd = to_backlight_device(dev);
- 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)
+static ssize_t backlight_store_brightness(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
{
int rc = -ENXIO;
char *endp;
- struct backlight_device *bd = to_backlight_device(cdev);
+ struct backlight_device *bd = to_backlight_device(dev);
int brightness = simple_strtoul(buf, &endp, 0);
size_t size = endp - buf;
if (size != count)
return -EINVAL;
- down(&bd->sem);
- 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;
- backlight_update_status(bd);
+ if (bd->props.brightness != brightness) {
+ 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)
+static ssize_t backlight_show_max_brightness(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
- int rc = -ENXIO;
- struct backlight_device *bd = to_backlight_device(cdev);
-
- down(&bd->sem);
- if (bd->props)
- rc = sprintf(buf, "%d\n", bd->props->max_brightness);
- up(&bd->sem);
+ struct backlight_device *bd = to_backlight_device(dev);
- return rc;
+ return sprintf(buf, "%d\n", bd->props.max_brightness);
}
-static ssize_t backlight_show_actual_brightness(struct class_device *cdev,
- char *buf)
+static ssize_t backlight_show_actual_brightness(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
int rc = -ENXIO;
- struct backlight_device *bd = to_backlight_device(cdev);
+ struct backlight_device *bd = to_backlight_device(dev);
- down(&bd->sem);
- if (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;
}
-static void backlight_class_release(struct class_device *dev)
+static struct class *backlight_class;
+
+static void bl_device_release(struct device *dev)
{
struct backlight_device *bd = to_backlight_device(dev);
kfree(bd);
}
-static struct class backlight_class = {
- .name = "backlight",
- .release = backlight_class_release,
-};
-
-#define DECLARE_ATTR(_name,_mode,_show,_store) \
-{ \
- .attr = { .name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE }, \
- .show = _show, \
- .store = _store, \
-}
-
-static const struct class_device_attribute bl_class_device_attributes[] = {
- DECLARE_ATTR(power, 0644, backlight_show_power, backlight_store_power),
- DECLARE_ATTR(brightness, 0644, backlight_show_brightness,
+static struct device_attribute bl_device_attributes[] = {
+ __ATTR(bl_power, 0644, backlight_show_power, backlight_store_power),
+ __ATTR(brightness, 0644, backlight_show_brightness,
backlight_store_brightness),
- DECLARE_ATTR(actual_brightness, 0444, backlight_show_actual_brightness,
+ __ATTR(actual_brightness, 0444, backlight_show_actual_brightness,
NULL),
- DECLARE_ATTR(max_brightness, 0444, backlight_show_max_brightness, NULL),
+ __ATTR(max_brightness, 0444, backlight_show_max_brightness, NULL),
+ __ATTR_NULL,
};
/**
* backlight_device class.
* @name: the name of the new object(must be the same as the name of the
* 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.
+ * @devdata: an optional pointer to be stored for private driver use. The
+ * methods may retrieve it by using bl_get_data(bd).
+ * @ops: the backlight operations structure.
*
- * Creates and registers new backlight class_device. Returns either an
+ * Creates and registers new backlight 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 device *parent, void *devdata, struct backlight_ops *ops)
{
- int i, rc;
struct backlight_device *new_bd;
+ int rc;
- pr_debug("backlight_device_alloc: name=%s\n", name);
+ pr_debug("backlight_device_register: 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);
- init_MUTEX(&new_bd->sem);
- new_bd->props = bp;
- memset(&new_bd->class_dev, 0, sizeof(new_bd->class_dev));
- 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);
+ mutex_init(&new_bd->ops_lock);
+
+ new_bd->dev.class = backlight_class;
+ new_bd->dev.parent = parent;
+ new_bd->dev.release = bl_device_release;
+ strlcpy(new_bd->dev.bus_id, name, BUS_ID_SIZE);
+ dev_set_drvdata(&new_bd->dev, devdata);
+
+ rc = device_register(&new_bd->dev);
if (rc) {
kfree(new_bd);
return ERR_PTR(rc);
rc = backlight_register_fb(new_bd);
if (rc) {
- class_device_unregister(&new_bd->class_dev);
+ device_unregister(&new_bd->dev);
return ERR_PTR(rc);
}
+ new_bd->ops = ops;
- 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 (rc) {
- while (--i >= 0)
- class_device_remove_file(&new_bd->class_dev,
- &bl_class_device_attributes[i]);
- class_device_unregister(&new_bd->class_dev);
- /* No need to kfree(new_bd) since release() method was called */
- return ERR_PTR(rc);
- }
- }
+#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;
}
*/
void backlight_device_unregister(struct backlight_device *bd)
{
- int i;
-
if (!bd)
return;
- pr_debug("backlight_device_unregister: name=%s\n", bd->class_dev.class_id);
-
- 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);
+#ifdef CONFIG_PMAC_BACKLIGHT
+ mutex_lock(&pmac_backlight_mutex);
+ if (pmac_backlight == bd)
+ pmac_backlight = NULL;
+ mutex_unlock(&pmac_backlight_mutex);
+#endif
+ mutex_lock(&bd->ops_lock);
+ bd->ops = NULL;
+ mutex_unlock(&bd->ops_lock);
backlight_unregister_fb(bd);
-
- class_device_unregister(&bd->class_dev);
+ device_unregister(&bd->dev);
}
EXPORT_SYMBOL(backlight_device_unregister);
static void __exit backlight_class_exit(void)
{
- class_unregister(&backlight_class);
+ class_destroy(backlight_class);
}
static int __init backlight_class_init(void)
{
- return class_register(&backlight_class);
+ backlight_class = class_create(THIS_MODULE, "backlight");
+ if (IS_ERR(backlight_class)) {
+ printk(KERN_WARNING "Unable to create backlight class; errno = %ld\n",
+ PTR_ERR(backlight_class));
+ return PTR_ERR(backlight_class);
+ }
+
+ backlight_class->dev_attrs = bl_device_attributes;
+ return 0;
}
/*