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

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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@chromium.org>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Acked-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrew Bresticker 2013-04-29 16:17:58 -07:00 committed by Linus Torvalds
parent 40d88fc60d
commit 46e1915eef
2 changed files with 7 additions and 0 deletions
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6
drivers/video/backlight/platform_lcd.c
View File

@ -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) {

1
include/video/platform_lcd.h
View File

@ -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 *);
};