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authorRichard Purdie <rpurdie@rpsys.net>2007-07-09 12:17:24 +0100
committerRichard Purdie <rpurdie@rpsys.net>2007-07-16 01:20:23 +0100
commit655bfd7aebb12481ab9275284d9500bee5ba3e70 (patch)
tree54503eb59a03d94db77edca3388d36e3e5315dd8 /drivers/video/backlight
parentfa9133c24c4115523c1381b67fdd74fd864ac0ea (diff)
backlight: Convert from struct class_device to struct device
Convert the backlight and LCD classes from struct class_device to struct device since class_device is scheduled for removal. One nasty API break is the backlight power attribute has had to be renamed to bl_power and the LCD power attribute has had to be renamed to lcd_power since the original names clash with the core. I can't see a way around this. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/video/backlight')
-rw-r--r--drivers/video/backlight/backlight.c125
-rw-r--r--drivers/video/backlight/cr_bllcd.c2
-rw-r--r--drivers/video/backlight/lcd.c112
3 files changed, 104 insertions, 135 deletions
diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
index 7e06223bca9..b26de8cf311 100644
--- a/drivers/video/backlight/backlight.c
+++ b/drivers/video/backlight/backlight.c
@@ -69,18 +69,20 @@ static inline void backlight_unregister_fb(struct backlight_device *bd)
}
#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)
{
- struct backlight_device *bd = to_backlight_device(cdev);
+ struct backlight_device *bd = to_backlight_device(dev);
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;
@@ -101,18 +103,20 @@ static ssize_t backlight_store_power(struct class_device *cdev, const char *buf,
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)
{
- struct backlight_device *bd = to_backlight_device(cdev);
+ struct backlight_device *bd = to_backlight_device(dev);
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;
@@ -138,18 +142,19 @@ static ssize_t backlight_store_brightness(struct class_device *cdev, const char
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)
{
- struct backlight_device *bd = to_backlight_device(cdev);
+ struct backlight_device *bd = to_backlight_device(dev);
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);
mutex_lock(&bd->ops_lock);
if (bd->ops && bd->ops->get_brightness)
@@ -159,31 +164,22 @@ static ssize_t backlight_show_actual_brightness(struct class_device *cdev,
return rc;
}
-static void backlight_class_release(struct class_device *dev)
+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 }, \
- .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,
};
/**
@@ -191,22 +187,20 @@ static const struct class_device_attribute bl_class_device_attributes[] = {
* 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).
+ * @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_ops *ops)
+ 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 = kzalloc(sizeof(struct backlight_device), GFP_KERNEL);
if (!new_bd)
@@ -214,13 +208,14 @@ struct backlight_device *backlight_device_register(const char *name,
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);
+ 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);
@@ -228,23 +223,11 @@ struct backlight_device *backlight_device_register(const char *name,
rc = backlight_register_fb(new_bd);
if (rc) {
- class_device_unregister(&new_bd->class_dev);
+ device_unregister(&new_bd->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 (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);
- }
- }
+ new_bd->ops = ops;
#ifdef CONFIG_PMAC_BACKLIGHT
mutex_lock(&pmac_backlight_mutex);
@@ -265,42 +248,40 @@ EXPORT_SYMBOL(backlight_device_register);
*/
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);
-
#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]);
-
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;
}
/*
diff --git a/drivers/video/backlight/cr_bllcd.c b/drivers/video/backlight/cr_bllcd.c
index e9bbc3455c9..3633b6e93e2 100644
--- a/drivers/video/backlight/cr_bllcd.c
+++ b/drivers/video/backlight/cr_bllcd.c
@@ -202,7 +202,7 @@ static int cr_backlight_probe(struct platform_device *pdev)
}
crp->cr_lcd_device = lcd_device_register("cr-lcd",
- &pdev->dev,
+ &pdev->dev, NULL
&cr_lcd_ops);
if (IS_ERR(crp->cr_lcd_device)) {
diff --git a/drivers/video/backlight/lcd.c b/drivers/video/backlight/lcd.c
index 648b53c1fde..6f652c65fae 100644
--- a/drivers/video/backlight/lcd.c
+++ b/drivers/video/backlight/lcd.c
@@ -61,10 +61,11 @@ static inline void lcd_unregister_fb(struct lcd_device *ld)
}
#endif /* CONFIG_FB */
-static ssize_t lcd_show_power(struct class_device *cdev, char *buf)
+static ssize_t lcd_show_power(struct device *dev, struct device_attribute *attr,
+ char *buf)
{
int rc;
- struct lcd_device *ld = to_lcd_device(cdev);
+ struct lcd_device *ld = to_lcd_device(dev);
mutex_lock(&ld->ops_lock);
if (ld->ops && ld->ops->get_power)
@@ -76,11 +77,12 @@ static ssize_t lcd_show_power(struct class_device *cdev, char *buf)
return rc;
}
-static ssize_t lcd_store_power(struct class_device *cdev, const char *buf, size_t count)
+static ssize_t lcd_store_power(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
{
int rc = -ENXIO;
char *endp;
- struct lcd_device *ld = to_lcd_device(cdev);
+ struct lcd_device *ld = to_lcd_device(dev);
int power = simple_strtoul(buf, &endp, 0);
size_t size = endp - buf;
@@ -100,10 +102,11 @@ static ssize_t lcd_store_power(struct class_device *cdev, const char *buf, size_
return rc;
}
-static ssize_t lcd_show_contrast(struct class_device *cdev, char *buf)
+static ssize_t lcd_show_contrast(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
int rc = -ENXIO;
- struct lcd_device *ld = to_lcd_device(cdev);
+ struct lcd_device *ld = to_lcd_device(dev);
mutex_lock(&ld->ops_lock);
if (ld->ops && ld->ops->get_contrast)
@@ -113,11 +116,12 @@ static ssize_t lcd_show_contrast(struct class_device *cdev, char *buf)
return rc;
}
-static ssize_t lcd_store_contrast(struct class_device *cdev, const char *buf, size_t count)
+static ssize_t lcd_store_contrast(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
{
int rc = -ENXIO;
char *endp;
- struct lcd_device *ld = to_lcd_device(cdev);
+ struct lcd_device *ld = to_lcd_device(dev);
int contrast = simple_strtoul(buf, &endp, 0);
size_t size = endp - buf;
@@ -137,53 +141,45 @@ static ssize_t lcd_store_contrast(struct class_device *cdev, const char *buf, si
return rc;
}
-static ssize_t lcd_show_max_contrast(struct class_device *cdev, char *buf)
+static ssize_t lcd_show_max_contrast(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
- struct lcd_device *ld = to_lcd_device(cdev);
+ struct lcd_device *ld = to_lcd_device(dev);
return sprintf(buf, "%d\n", ld->props.max_contrast);
}
-static void lcd_class_release(struct class_device *dev)
+struct class *lcd_class;
+
+static void lcd_device_release(struct device *dev)
{
struct lcd_device *ld = to_lcd_device(dev);
kfree(ld);
}
-static struct class lcd_class = {
- .name = "lcd",
- .release = lcd_class_release,
-};
-
-#define DECLARE_ATTR(_name,_mode,_show,_store) \
-{ \
- .attr = { .name = __stringify(_name), .mode = _mode }, \
- .show = _show, \
- .store = _store, \
-}
-
-static const struct class_device_attribute lcd_class_device_attributes[] = {
- DECLARE_ATTR(power, 0644, lcd_show_power, lcd_store_power),
- DECLARE_ATTR(contrast, 0644, lcd_show_contrast, lcd_store_contrast),
- DECLARE_ATTR(max_contrast, 0444, lcd_show_max_contrast, NULL),
+static struct device_attribute lcd_device_attributes[] = {
+ __ATTR(lcd_power, 0644, lcd_show_power, lcd_store_power),
+ __ATTR(contrast, 0644, lcd_show_contrast, lcd_store_contrast),
+ __ATTR(max_contrast, 0444, lcd_show_max_contrast, NULL),
+ __ATTR_NULL,
};
/**
* lcd_device_register - register a new object of lcd_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(ld->class_dev).
+ * @devdata: an optional pointer to be stored in the device. The
+ * methods may retrieve it by using lcd_get_data(ld).
* @ops: the lcd operations structure.
*
- * Creates and registers a new lcd class_device. Returns either an ERR_PTR()
+ * Creates and registers a new lcd device. Returns either an ERR_PTR()
* or a pointer to the newly allocated device.
*/
-struct lcd_device *lcd_device_register(const char *name, void *devdata,
- struct lcd_ops *ops)
+struct lcd_device *lcd_device_register(const char *name, struct device *parent,
+ void *devdata, struct lcd_ops *ops)
{
- int i, rc;
struct lcd_device *new_ld;
+ int rc;
pr_debug("lcd_device_register: name=%s\n", name);
@@ -193,12 +189,14 @@ struct lcd_device *lcd_device_register(const char *name, void *devdata,
mutex_init(&new_ld->ops_lock);
mutex_init(&new_ld->update_lock);
- new_ld->ops = ops;
- new_ld->class_dev.class = &lcd_class;
- strlcpy(new_ld->class_dev.class_id, name, KOBJ_NAME_LEN);
- class_set_devdata(&new_ld->class_dev, devdata);
- rc = class_device_register(&new_ld->class_dev);
+ new_ld->dev.class = lcd_class;
+ new_ld->dev.parent = parent;
+ new_ld->dev.release = lcd_device_release;
+ strlcpy(new_ld->dev.bus_id, name, BUS_ID_SIZE);
+ dev_set_drvdata(&new_ld->dev, devdata);
+
+ rc = device_register(&new_ld->dev);
if (rc) {
kfree(new_ld);
return ERR_PTR(rc);
@@ -206,22 +204,11 @@ struct lcd_device *lcd_device_register(const char *name, void *devdata,
rc = lcd_register_fb(new_ld);
if (rc) {
- class_device_unregister(&new_ld->class_dev);
+ device_unregister(&new_ld->dev);
return ERR_PTR(rc);
}
- for (i = 0; i < ARRAY_SIZE(lcd_class_device_attributes); i++) {
- rc = class_device_create_file(&new_ld->class_dev,
- &lcd_class_device_attributes[i]);
- if (rc) {
- while (--i >= 0)
- class_device_remove_file(&new_ld->class_dev,
- &lcd_class_device_attributes[i]);
- class_device_unregister(&new_ld->class_dev);
- /* No need to kfree(new_ld) since release() method was called */
- return ERR_PTR(rc);
- }
- }
+ new_ld->ops = ops;
return new_ld;
}
@@ -235,33 +222,34 @@ EXPORT_SYMBOL(lcd_device_register);
*/
void lcd_device_unregister(struct lcd_device *ld)
{
- int i;
-
if (!ld)
return;
- pr_debug("lcd_device_unregister: name=%s\n", ld->class_dev.class_id);
-
- for (i = 0; i < ARRAY_SIZE(lcd_class_device_attributes); i++)
- class_device_remove_file(&ld->class_dev,
- &lcd_class_device_attributes[i]);
-
mutex_lock(&ld->ops_lock);
ld->ops = NULL;
mutex_unlock(&ld->ops_lock);
lcd_unregister_fb(ld);
- class_device_unregister(&ld->class_dev);
+
+ device_unregister(&ld->dev);
}
EXPORT_SYMBOL(lcd_device_unregister);
static void __exit lcd_class_exit(void)
{
- class_unregister(&lcd_class);
+ class_destroy(lcd_class);
}
static int __init lcd_class_init(void)
{
- return class_register(&lcd_class);
+ lcd_class = class_create(THIS_MODULE, "lcd");
+ if (IS_ERR(lcd_class)) {
+ printk(KERN_WARNING "Unable to create backlight class; errno = %ld\n",
+ PTR_ERR(lcd_class));
+ return PTR_ERR(lcd_class);
+ }
+
+ lcd_class->dev_attrs = lcd_device_attributes;
+ return 0;
}
/*