linux-kernel - Re: [PATCH 28/36] video: backlight: lcd: convert class code to use dev

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Date:	Thu, 25 Jul 2013 10:51:02 +0900
From:	Jingoo Han <jg1.han@...sung.com>
To:	'Greg Kroah-Hartman' <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org
Cc:	'Richard Purdie' <rpurdie@...ys.net>,
	Jingoo Han <jg1.han@...sung.com>
Subject: Re: [PATCH 28/36] video: backlight: lcd: convert class code to use
 dev_groups

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 lcd class
> code to use the correct field.
> 
> Cc: Richard Purdie <rpurdie@...ys.net>
> Cc: Jingoo Han <jg1.han@...sung.com>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> ---
> 
> 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@...sung.com>

Best regards,
Jingoo Han

> 
>  drivers/video/backlight/lcd.c | 26 +++++++++++++++-----------
>  1 file changed, 15 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/video/backlight/lcd.c b/drivers/video/backlight/lcd.c
> index 41964a71..93cf15ef 100644
> --- a/drivers/video/backlight/lcd.c
> +++ b/drivers/video/backlight/lcd.c
> @@ -89,7 +89,7 @@ static inline void lcd_unregister_fb(struct lcd_device *ld)
>  }
>  #endif /* CONFIG_FB */
> 
> -static ssize_t lcd_show_power(struct device *dev, struct device_attribute *attr,
> +static ssize_t lcd_power_show(struct device *dev, struct device_attribute *attr,
>  		char *buf)
>  {
>  	int rc;
> @@ -105,7 +105,7 @@ static ssize_t lcd_show_power(struct device *dev, struct device_attribute *attr,
>  	return rc;
>  }
> 
> -static ssize_t lcd_store_power(struct device *dev,
> +static ssize_t lcd_power_store(struct device *dev,
>  		struct device_attribute *attr, const char *buf, size_t count)
>  {
>  	int rc;
> @@ -128,8 +128,9 @@ static ssize_t lcd_store_power(struct device *dev,
> 
>  	return rc;
>  }
> +static DEVICE_ATTR_RW(lcd_power);
> 
> -static ssize_t lcd_show_contrast(struct device *dev,
> +static ssize_t contrast_show(struct device *dev,
>  		struct device_attribute *attr, char *buf)
>  {
>  	int rc = -ENXIO;
> @@ -143,7 +144,7 @@ static ssize_t lcd_show_contrast(struct device *dev,
>  	return rc;
>  }
> 
> -static ssize_t lcd_store_contrast(struct device *dev,
> +static ssize_t contrast_store(struct device *dev,
>  		struct device_attribute *attr, const char *buf, size_t count)
>  {
>  	int rc;
> @@ -166,14 +167,16 @@ static ssize_t lcd_store_contrast(struct device *dev,
> 
>  	return rc;
>  }
> +static DEVICE_ATTR_RW(contrast);
> 
> -static ssize_t lcd_show_max_contrast(struct device *dev,
> +static ssize_t max_contrast_show(struct device *dev,
>  		struct device_attribute *attr, char *buf)
>  {
>  	struct lcd_device *ld = to_lcd_device(dev);
> 
>  	return sprintf(buf, "%d\n", ld->props.max_contrast);
>  }
> +static DEVICE_ATTR_RO(max_contrast);
> 
>  static struct class *lcd_class;
> 
> @@ -183,12 +186,13 @@ static void lcd_device_release(struct device *dev)
>  	kfree(ld);
>  }
> 
> -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,
> +static struct attribute *lcd_device_attrs[] = {
> +	&dev_attr_lcd_power.attr,
> +	&dev_attr_contrast.attr,
> +	&dev_attr_max_contrast.attr,
> +	NULL,
>  };
> +ATTRIBUTE_GROUPS(lcd_device);
> 
>  /**
>   * lcd_device_register - register a new object of lcd_device class.
> @@ -344,7 +348,7 @@ static int __init lcd_class_init(void)
>  		return PTR_ERR(lcd_class);
>  	}
> 
> -	lcd_class->dev_attrs = lcd_device_attributes;
> +	lcd_class->dev_groups = lcd_device_groups;
>  	return 0;
>  }
> 
> --
> 1.8.3.rc0.20.gb99dd2e

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