[PATCHv2 2/2] atmel_lcdfb: blank the backlight on remove
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From: Richard Genoud <hidden>
Date: 2013-05-31 15:49:52
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Subsystem:
framebuffer layer, the rest · Maintainers:
Helge Deller, Linus Torvalds
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 <redacted> --- drivers/video/atmel_lcdfb.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/video/atmel_lcdfb.c b/drivers/video/atmel_lcdfb.c
index 6e6491f..effdb37 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
--
1.7.10.4