linux-kernel - Re: [PATCH v2] backlight: platform

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Date:	Mon, 15 Apr 2013 10:47:17 +0900
From:	Jingoo Han <jg1.han@...sung.com>
To:	'Andrew Bresticker' <abrestic@...omium.org>,
	'Andrew Morton' <akpm@...ux-foundation.org>
Cc:	linux-fbdev@...r.kernel.org, 'Richard Purdie' <rpurdie@...ys.net>,
	'Florian Tobias Schandinat' <FlorianSchandinat@....de>,
	linux-kernel@...r.kernel.org,
	'Doug Anderson' <dianders@...omium.org>,
	'Jingoo Han' <jg1.han@...sung.com>
Subject: Re: [PATCH v2] backlight: platform_lcd: introduce probe callback

On Friday, April 12, 2013 5:25 AM, Andrew Bresticker wrote:
> 
> Platform LCD devices may need to do some device-specific
> initialization before they can be used (regulator or GPIO setup,
> for example), but currently the driver does not support any way of
> doing this.  This patch adds a probe() callback to plat_lcd_data
> which platform LCD devices can set to indicate that device-specific
> initialization is needed.
> 
> Signed-off-by: Andrew Bresticker <abrestic@...omium.org>

CC'ed Andrew Morton,

It looks good.
Acked-by: Jingoo Han <jg1.han@...sung.com>

Best regards,
Jingoo Han


> ---
>  drivers/video/backlight/platform_lcd.c | 6 ++++++
>  include/video/platform_lcd.h           | 1 +
>  2 files changed, 7 insertions(+)
> 
> diff --git a/drivers/video/backlight/platform_lcd.c b/drivers/video/backlight/platform_lcd.c
> index 17a6b83..f46180e 100644
> --- a/drivers/video/backlight/platform_lcd.c
> +++ b/drivers/video/backlight/platform_lcd.c
> @@ -86,6 +86,12 @@ static int platform_lcd_probe(struct platform_device *pdev)
>  		return -EINVAL;
>  	}
> 
> +	if (pdata->probe) {
> +		err = pdata->probe(pdata);
> +		if (err)
> +			return err;
> +	}
> +
>  	plcd = devm_kzalloc(&pdev->dev, sizeof(struct platform_lcd),
>  			    GFP_KERNEL);
>  	if (!plcd) {
> diff --git a/include/video/platform_lcd.h b/include/video/platform_lcd.h
> index ad3bdfe..23864b2 100644
> --- a/include/video/platform_lcd.h
> +++ b/include/video/platform_lcd.h
> @@ -15,6 +15,7 @@ struct plat_lcd_data;
>  struct fb_info;
> 
>  struct plat_lcd_data {
> +	int	(*probe)(struct plat_lcd_data *);
>  	void	(*set_power)(struct plat_lcd_data *, unsigned int power);
>  	int	(*match_fb)(struct plat_lcd_data *, struct fb_info *);
>  };
> --
> 1.8.1.3
> 


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