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Commit 46e1915e authored by Andrew Bresticker's avatar Andrew Bresticker Committed by Linus Torvalds
Browse files

drivers/video/backlight/platform_lcd.c: introduce probe callback 



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: default avatarAndrew Bresticker <abrestic@chromium.org>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Reviewed-by: default avatarDoug Anderson <dianders@chromium.org>
Acked-by: default avatarJingoo Han <jg1.han@samsung.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 40d88fc6

drivers/video/backlight/platform_lcd.c

+6 −0
Original line number Diff line number Diff line
@@ -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) {

include/video/platform_lcd.h

+1 −0
Original line number Diff line number Diff line
@@ -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 *);

};