From: Boris BREZILLON <boris.brezillon@free-electrons.com>
Date: Wed, 30 Mar 2016 20:03:25 +0000 (+0200)
Subject: UPSTREAM: backlight: pwm_bl: Remove useless call to pwm_set_period()
X-Git-Tag: firefly_0821_release~448
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=a0a5f14bc8620564b428025f7ab812d2c5d9a87e;p=firefly-linux-kernel-4.4.55.git

UPSTREAM: backlight: pwm_bl: Remove useless call to pwm_set_period()

The PWM period will be set when calling pwm_config. Remove this useless
call to pwm_set_period(), which might mess up the internal PWM state.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
(cherry picked from commit 7f044b09b68d36811518c55f736a20648e8ed6e2)

Change-Id: I6eecc6cd8e9dbe5929bdc016433772a721711928
Signed-off-by: David Wu <david.wu@rock-chips.com>
---

diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
index 64f9e1b8655f..a33a290fc956 100644
--- a/drivers/video/backlight/pwm_bl.c
+++ b/drivers/video/backlight/pwm_bl.c
@@ -313,10 +313,8 @@ static int pwm_backlight_probe(struct platform_device *pdev)
 	 * via the PWM lookup table.
 	 */
 	pb->period = pwm_get_period(pb->pwm);
-	if (!pb->period && (data->pwm_period_ns > 0)) {
+	if (!pb->period && (data->pwm_period_ns > 0))
 		pb->period = data->pwm_period_ns;
-		pwm_set_period(pb->pwm, data->pwm_period_ns);
-	}
 
 	pb->lth_brightness = data->lth_brightness * (pb->period / pb->scale);