From: lyx <lyx@rock-chips.com>
Date: Mon, 25 Apr 2011 03:01:46 +0000 (-0700)
Subject: rk29 mobile sdk:add backlight shutdown function
X-Git-Tag: firefly_0821_release~10422
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e989e41c4b10ce1262406027b133460dc27fea54;p=firefly-linux-kernel-4.4.55.git

rk29 mobile sdk:add backlight shutdown function
---

diff --git a/drivers/video/backlight/wm831x_bl.c b/drivers/video/backlight/wm831x_bl.c
index 0f52691b04fa..dca935efd094 100755
--- a/drivers/video/backlight/wm831x_bl.c
+++ b/drivers/video/backlight/wm831x_bl.c
@@ -34,6 +34,7 @@ struct wm831x_backlight_data {
 	struct 	early_suspend early_suspend;
 	struct delayed_work work;
 	int suspend_flag;
+	int shutdown_flag;
 #endif
 };
 #define TS_POLL_DELAY (10000*1000*1000)
@@ -130,6 +131,8 @@ static int wm831x_backlight_update_status(struct backlight_device *bl)
 
 	if(gwm831x_data->suspend_flag == 1)
 		brightness = 0;
+	if (gwm831x_data->shutdown_flag == 1)
+		brightness = 0;
 		
 	if (bl->props.power != FB_BLANK_UNBLANK)
 		brightness = 0;
@@ -305,6 +308,17 @@ static int wm831x_backlight_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static void wm831x_backlight_shutdown(struct platform_device *pdev)
+{
+	struct backlight_device *bl = platform_get_drvdata(pdev);
+	struct wm831x_backlight_data *data = bl_get_data(bl);
+	
+	printk("enter %s\n", __func__);
+	data->shutdown_flag = 1;
+	wm831x_backlight_update_status(bl);
+	return;
+}
+
 static struct platform_driver wm831x_backlight_driver = {
 	.driver		= {
 		.name	= "wm831x-backlight",
@@ -312,6 +326,7 @@ static struct platform_driver wm831x_backlight_driver = {
 	},
 	.probe		= wm831x_backlight_probe,
 	.remove		= wm831x_backlight_remove,
+	.shutdown	= wm831x_backlight_shutdown,
 };
 
 static int __init wm831x_backlight_init(void)