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author | Richard Purdie <rpurdie@rpsys.net> | 2007-07-09 12:17:24 +0100 |
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committer | Richard Purdie <rpurdie@rpsys.net> | 2007-07-16 01:20:23 +0100 |
commit | 655bfd7aebb12481ab9275284d9500bee5ba3e70 (patch) | |
tree | 54503eb59a03d94db77edca3388d36e3e5315dd8 /drivers/video/backlight/backlight.c | |
parent | fa9133c24c4115523c1381b67fdd74fd864ac0ea (diff) | |
download | op-kernel-dev-655bfd7aebb12481ab9275284d9500bee5ba3e70.zip op-kernel-dev-655bfd7aebb12481ab9275284d9500bee5ba3e70.tar.gz |
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/backlight.c')
-rw-r--r-- | drivers/video/backlight/backlight.c | 125 |
1 files changed, 53 insertions, 72 deletions
diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c index 7e06223..b26de8c 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; } /* |