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From: Sascha Hauer <s.hauer@pengutronix.de>
To: Barebox List <barebox@lists.infradead.org>
Subject: [PATCH 08/10] video: backlight-pwm: Add regulator support
Date: Wed, 23 Sep 2015 13:47:29 +0200	[thread overview]
Message-ID: <1443008851-26596-9-git-send-email-s.hauer@pengutronix.de> (raw)
In-Reply-To: <1443008851-26596-1-git-send-email-s.hauer@pengutronix.de>

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/video/backlight-pwm.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/video/backlight-pwm.c b/drivers/video/backlight-pwm.c
index 8f17f21..ba6f9bc 100644
--- a/drivers/video/backlight-pwm.c
+++ b/drivers/video/backlight-pwm.c
@@ -24,6 +24,7 @@
 #include <pwm.h>
 #include <linux/err.h>
 #include <of.h>
+#include <regulator.h>
 #include <gpio.h>
 #include <of_gpio.h>
 #include <asm-generic/div64.h>
@@ -31,6 +32,7 @@
 struct pwm_backlight {
 	struct backlight_device backlight;
 	struct pwm_device *pwm;
+	struct regulator *power;
 	uint32_t period;
 	unsigned int *levels;
 	int enable_gpio;
@@ -50,6 +52,8 @@ static int backlight_pwm_enable(struct pwm_backlight *pwm_backlight)
 	if (ret)
 		return ret;
 
+	regulator_enable(pwm_backlight->power);
+
 	if (gpio_is_valid(pwm_backlight->enable_gpio)) {
 		gpio_direction_output(pwm_backlight->enable_gpio,
 				pwm_backlight->enable_active_high);
@@ -68,6 +72,9 @@ static int backlight_pwm_disable(struct pwm_backlight *pwm_backlight)
 	if (gpio_is_valid(pwm_backlight->enable_gpio)) {
 		gpio_direction_output(pwm_backlight->enable_gpio,
 				!pwm_backlight->enable_active_high);
+
+		regulator_disable(pwm_backlight->power);
+
 		/*
 		 * Only disable PWM when an enable gpio is present.
 		 * The output of the PWM is undefined when the PWM
@@ -173,6 +180,12 @@ static int backlight_pwm_of_probe(struct device_d *dev)
 	if (ret)
 		return ret;
 
+	pwm_backlight->power = regulator_get(dev, "power");
+	if (IS_ERR(pwm_backlight->power)) {
+		dev_err(dev, "Cannot find regulator\n");
+		return PTR_ERR(pwm_backlight->power);
+	}
+
 	pwm_backlight->period = pwm_get_period(pwm_backlight->pwm);
 
 	pwm_backlight->backlight.brightness_set = backlight_pwm_set;
-- 
2.5.1


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  parent reply	other threads:[~2015-09-23 11:47 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-09-23 11:47 [PATCH v2] video: imx-ipu-v3: ldb fixes Sascha Hauer
2015-09-23 11:47 ` [PATCH 01/10] video: ipuv3: Do not crash when no mode is found Sascha Hauer
2015-09-23 11:47 ` [PATCH 02/10] video: ipuv3: imx-ldb: remove unused variable Sascha Hauer
2015-09-23 11:47 ` [PATCH 03/10] video: ipuv3: imx-ldb: Support video modes in ldb node Sascha Hauer
2015-09-23 11:47 ` [PATCH 04/10] video: simple-panel: Add debug/error messages Sascha Hauer
2015-09-23 11:47 ` [PATCH 05/10] video: simple-panel: Add support for device tree provided nodes Sascha Hauer
2015-09-23 11:47 ` [PATCH 06/10] video: ipuv3: print error message when no modes are found Sascha Hauer
2015-09-23 11:47 ` [PATCH 07/10] video: backlight-pwm: Add error message Sascha Hauer
2015-09-23 11:47 ` Sascha Hauer [this message]
2015-09-23 11:47 ` [PATCH 09/10] ARM: i.MX: GuF Santaro: enable PWM Sascha Hauer
2015-09-23 11:47 ` [PATCH 10/10] ARM: i.MX: GuF Santaro: Fix panel support Sascha Hauer

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