From 46e1915eef9c0e935a09808a30e167abb857b4ec Mon Sep 17 00:00:00 2001 From: Andrew Bresticker Date: Mon, 29 Apr 2013 16:17:58 -0700 Subject: [PATCH] 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: Andrew Bresticker Cc: Richard Purdie Cc: Florian Tobias Schandinat Reviewed-by: Doug Anderson Acked-by: Jingoo Han Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- 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 54d94de652b0..056836706708 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 ad3bdfe743b2..23864b284147 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 *); };