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authorRichard Genoud <richard.genoud@gmail.com>2013-05-31 15:49:35 +0000
committerJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>2013-06-01 03:18:55 +0800
commit56c21b53ab071feb3ce93375a563ead745fa7105 (patch)
treec6c10744b170546f41b6467d0458d5203d0dadca
parent65ac057bce426b4abdf42384c4e09e40a634df32 (diff)
downloadlinux-56c21b53ab071feb3ce93375a563ead745fa7105.tar.gz
atmel_lcdfb: blank the backlight on remove
When removing atmel_lcdfb module, the backlight is unregistered but not blanked. (only for CONFIG_BACKLIGHT_ATMEL_LCDC case). This can result in the screen going full white depending on how the PWM is wired. Signed-off-by: Richard Genoud <richard.genoud@gmail.com> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
-rw-r--r--drivers/video/atmel_lcdfb.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/video/atmel_lcdfb.c b/drivers/video/atmel_lcdfb.c
index 6e6491fb83b..effdb373b8d 100644
--- a/drivers/video/atmel_lcdfb.c
+++ b/drivers/video/atmel_lcdfb.c
@@ -223,8 +223,14 @@ static void init_backlight(struct atmel_lcdfb_info *sinfo)
static void exit_backlight(struct atmel_lcdfb_info *sinfo)
{
- if (sinfo->backlight)
- backlight_device_unregister(sinfo->backlight);
+ if (!sinfo->backlight)
+ return;
+
+ if (sinfo->backlight->ops) {
+ sinfo->backlight->props.power = FB_BLANK_POWERDOWN;
+ sinfo->backlight->ops->update_status(sinfo->backlight);
+ }
+ backlight_device_unregister(sinfo->backlight);
}
#else