Re: [PATCH 27/36] video: backlight: convert class code to usedev_groups

[Jingoo Han]

On Thursday, July 25, 2013 7:06 AM, Greg Kroah-Hartman wrote:
> 
> The dev_attrs field of struct class is going away soon, dev_groups
> should be used instead.  This converts the video backlight class code to
> use the correct field.
> 
> Cc: Richard Purdie <rpurdie@xxxxxxxxx>
> Cc: Jingoo Han <jg1.han@xxxxxxxxxxx>
> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> ---
> 
> Richard, feel free to take this through your tree, or ACK it and I can
> take it through mine.

Hi Greg Kroah-Hartman,

I hope that it will go through your tree with my Ack.

Acked-by: Jingoo Han <jg1.han@xxxxxxxxxxx>

Best regards,
Jingoo Han


> 
>  drivers/video/backlight/backlight.c | 44 ++++++++++++++++++++-----------------
>  1 file changed, 24 insertions(+), 20 deletions(-)
> 
> diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
> index 3fccb6d3..94a403a9 100644
> --- a/drivers/video/backlight/backlight.c
> +++ b/drivers/video/backlight/backlight.c
> @@ -103,16 +103,16 @@ static void backlight_generate_event(struct backlight_device *bd,
>  	sysfs_notify(&bd->dev.kobj, NULL, "actual_brightness");
>  }
> 
> -static ssize_t backlight_show_power(struct device *dev,
> -		struct device_attribute *attr, char *buf)
> +static ssize_t bl_power_show(struct device *dev, struct device_attribute *attr,
> +		char *buf)
>  {
>  	struct backlight_device *bd = to_backlight_device(dev);
> 
>  	return sprintf(buf, "%d\n", bd->props.power);
>  }
> 
> -static ssize_t backlight_store_power(struct device *dev,
> -		struct device_attribute *attr, const char *buf, size_t count)
> +static ssize_t bl_power_store(struct device *dev, struct device_attribute *attr,
> +		const char *buf, size_t count)
>  {
>  	int rc;
>  	struct backlight_device *bd = to_backlight_device(dev);
> @@ -136,8 +136,9 @@ static ssize_t backlight_store_power(struct device *dev,
> 
>  	return rc;
>  }
> +static DEVICE_ATTR_RW(bl_power);
> 
> -static ssize_t backlight_show_brightness(struct device *dev,
> +static ssize_t brightness_show(struct device *dev,
>  		struct device_attribute *attr, char *buf)
>  {
>  	struct backlight_device *bd = to_backlight_device(dev);
> @@ -145,7 +146,7 @@ static ssize_t backlight_show_brightness(struct device *dev,
>  	return sprintf(buf, "%d\n", bd->props.brightness);
>  }
> 
> -static ssize_t backlight_store_brightness(struct device *dev,
> +static ssize_t brightness_store(struct device *dev,
>  		struct device_attribute *attr, const char *buf, size_t count)
>  {
>  	int rc;
> @@ -175,24 +176,27 @@ static ssize_t backlight_store_brightness(struct device *dev,
> 
>  	return rc;
>  }
> +static DEVICE_ATTR_RW(brightness);
> 
> -static ssize_t backlight_show_type(struct device *dev,
> -		struct device_attribute *attr, char *buf)
> +static ssize_t type_show(struct device *dev, struct device_attribute *attr,
> +		char *buf)
>  {
>  	struct backlight_device *bd = to_backlight_device(dev);
> 
>  	return sprintf(buf, "%s\n", backlight_types[bd->props.type]);
>  }
> +static DEVICE_ATTR_RO(type);
> 
> -static ssize_t backlight_show_max_brightness(struct device *dev,
> +static ssize_t max_brightness_show(struct device *dev,
>  		struct device_attribute *attr, char *buf)
>  {
>  	struct backlight_device *bd = to_backlight_device(dev);
> 
>  	return sprintf(buf, "%d\n", bd->props.max_brightness);
>  }
> +static DEVICE_ATTR_RO(max_brightness);
> 
> -static ssize_t backlight_show_actual_brightness(struct device *dev,
> +static ssize_t actual_brightness_show(struct device *dev,
>  		struct device_attribute *attr, char *buf)
>  {
>  	int rc = -ENXIO;
> @@ -205,6 +209,7 @@ static ssize_t backlight_show_actual_brightness(struct device *dev,
> 
>  	return rc;
>  }
> +static DEVICE_ATTR_RO(actual_brightness);
> 
>  static struct class *backlight_class;
> 
> @@ -247,16 +252,15 @@ static void bl_device_release(struct device *dev)
>  	kfree(bd);
>  }
> 
> -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),
> -	__ATTR(actual_brightness, 0444, backlight_show_actual_brightness,
> -		     NULL),
> -	__ATTR(max_brightness, 0444, backlight_show_max_brightness, NULL),
> -	__ATTR(type, 0444, backlight_show_type, NULL),
> -	__ATTR_NULL,
> +static struct attribute *bl_device_attrs[] = {
> +	&dev_attr_bl_power.attr,
> +	&dev_attr_brightness.attr,
> +	&dev_attr_actual_brightness.attr,
> +	&dev_attr_max_brightness.attr,
> +	&dev_attr_type.attr,
> +	NULL,
>  };
> +ATTRIBUTE_GROUPS(bl_device);
> 
>  /**
>   * backlight_force_update - tell the backlight subsystem that hardware state
> @@ -493,7 +497,7 @@ static int __init backlight_class_init(void)
>  		return PTR_ERR(backlight_class);
>  	}
> 
> -	backlight_class->dev_attrs = bl_device_attributes;
> +	backlight_class->dev_groups = bl_device_groups;
>  	backlight_class->pm = &backlight_class_dev_pm_ops;
>  	return 0;
>  }
> --
> 1.8.3.rc0.20.gb99dd2e

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