From 25520c95964e199e358fbf426346e51d0e497b0a Mon Sep 17 00:00:00 2001
From: Arun Murthy <arun.murthy@stericsson.com>
Date: Thu, 11 Nov 2010 14:05:28 -0800
Subject: [PATCH] --- yaml --- r: 221739 b: refs/heads/master c:
 fef7764f8bca9d603a8a51dcb522db97739a33c2 h: refs/heads/master i:   221737:
 fb49c3419ec2adae4541007ff79715d54a033ba9   221735:
 dbe3a8d483ad2c0912e3efc8c8896def1282bf6b v: v3

---
 [refs]                                 | 2 +-
 trunk/drivers/video/backlight/pwm_bl.c | 7 ++++++-
 trunk/include/linux/pwm_backlight.h    | 1 +
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/[refs] b/[refs]
index 2aad4fcb34ad..3dd48bd7c69a 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: a1025e224c518dceb342d0cc54e5513c6476f60c
+refs/heads/master: fef7764f8bca9d603a8a51dcb522db97739a33c2
diff --git a/trunk/drivers/video/backlight/pwm_bl.c b/trunk/drivers/video/backlight/pwm_bl.c
index 550443518891..21866ec69656 100644
--- a/trunk/drivers/video/backlight/pwm_bl.c
+++ b/trunk/drivers/video/backlight/pwm_bl.c
@@ -25,6 +25,7 @@ struct pwm_bl_data {
 	struct pwm_device	*pwm;
 	struct device		*dev;
 	unsigned int		period;
+	unsigned int		lth_brightness;
 	int			(*notify)(struct device *,
 					  int brightness);
 };
@@ -48,7 +49,9 @@ static int pwm_backlight_update_status(struct backlight_device *bl)
 		pwm_config(pb->pwm, 0, pb->period);
 		pwm_disable(pb->pwm);
 	} else {
-		pwm_config(pb->pwm, brightness * pb->period / max, pb->period);
+		brightness = pb->lth_brightness +
+			(brightness * (pb->period - pb->lth_brightness) / max);
+		pwm_config(pb->pwm, brightness, pb->period);
 		pwm_enable(pb->pwm);
 	}
 	return 0;
@@ -92,6 +95,8 @@ static int pwm_backlight_probe(struct platform_device *pdev)
 
 	pb->period = data->pwm_period_ns;
 	pb->notify = data->notify;
+	pb->lth_brightness = data->lth_brightness *
+		(data->pwm_period_ns / data->max_brightness);
 	pb->dev = &pdev->dev;
 
 	pb->pwm = pwm_request(data->pwm_id, "backlight");
diff --git a/trunk/include/linux/pwm_backlight.h b/trunk/include/linux/pwm_backlight.h
index 01b3d759f1fc..e031e1a486d9 100644
--- a/trunk/include/linux/pwm_backlight.h
+++ b/trunk/include/linux/pwm_backlight.h
@@ -8,6 +8,7 @@ struct platform_pwm_backlight_data {
 	int pwm_id;
 	unsigned int max_brightness;
 	unsigned int dft_brightness;
+	unsigned int lth_brightness;
 	unsigned int pwm_period_ns;
 	int (*init)(struct device *dev);
 	int (*notify)(struct device *dev, int brightness);