From 2fd622234328d1a0919b1737d190feee4af1c504 Mon Sep 17 00:00:00 2001
From: lyx <lyx@rock-chips.com>
Date: Fri, 28 Sep 2012 11:37:11 +0800
Subject: [PATCH] backlight: fix screen shine when poweroff
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[问题描述]
关机时lcd屏幕会闪烁

[问题分析]
lcd闪烁的原因是背光先与lcd打开，或背光后于lcd关闭；
目前代码在关机的时候并没有关闭背光的硬件开关，导致闪烁；

[修改说明]
背光的shutdown函数中，增加背光的关闭
---
 drivers/video/backlight/rk29_backlight.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/video/backlight/rk29_backlight.c b/drivers/video/backlight/rk29_backlight.c
index 49a78e3df766..596c37e8c6df 100755
--- a/drivers/video/backlight/rk29_backlight.c
+++ b/drivers/video/backlight/rk29_backlight.c
@@ -335,6 +335,9 @@ static void rk29_backlight_shutdown(struct platform_device *pdev)
 	rk29_bl->props.brightness = 0;
 	rk29_bl_update_status(rk29_bl);
 
+	if (rk29_bl_info && rk29_bl_info->pwm_suspend)
+		rk29_bl_info->pwm_suspend();
+
 	if (rk29_bl_info && rk29_bl_info->io_deinit)
 		rk29_bl_info->io_deinit();
 }
-- 
2.34.1