X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=drivers%2Fvideo%2Fpwm_backlight.c;h=53953179bfbdf93aa4d87ab415661eb4620669a5;hb=c0eaffa03959a97e6c139ea023e4041170e105e6;hp=fbd7bf783891655f3bedc10333d7f978ce0cdd0f;hpb=7cf208d73bd0ad08d486d3e338f44087dee9b755;p=u-boot

diff --git a/drivers/video/pwm_backlight.c b/drivers/video/pwm_backlight.c
index fbd7bf7838..53953179bf 100644
--- a/drivers/video/pwm_backlight.c
+++ b/drivers/video/pwm_backlight.c
@@ -1,8 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (c) 2016 Google, Inc
  * Written by Simon Glass <sjg@chromium.org>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
@@ -12,8 +11,6 @@
 #include <asm/gpio.h>
 #include <power/regulator.h>
 
-DECLARE_GLOBAL_DATA_PTR;
-
 struct pwm_backlight_priv {
 	struct udevice *reg;
 	struct gpio_desc enable;
@@ -32,16 +29,18 @@ static int pwm_backlight_enable(struct udevice *dev)
 	uint duty_cycle;
 	int ret;
 
-	plat = dev_get_uclass_platdata(priv->reg);
-	debug("%s: Enable '%s', regulator '%s'/'%s'\n", __func__, dev->name,
-	      priv->reg->name, plat->name);
-	ret = regulator_set_enable(priv->reg, true);
-	if (ret) {
-		debug("%s: Cannot enable regulator for PWM '%s'\n", __func__,
-		      dev->name);
-		return ret;
+	if (priv->reg) {
+		plat = dev_get_uclass_platdata(priv->reg);
+		debug("%s: Enable '%s', regulator '%s'/'%s'\n", __func__,
+		      dev->name, priv->reg->name, plat->name);
+		ret = regulator_set_enable(priv->reg, true);
+		if (ret) {
+			debug("%s: Cannot enable regulator for PWM '%s'\n",
+			      __func__, dev->name);
+			return ret;
+		}
+		mdelay(120);
 	}
-	mdelay(120);
 
 	duty_cycle = priv->period_ns * (priv->default_level - priv->min_level) /
 		(priv->max_level - priv->min_level + 1);
@@ -68,10 +67,8 @@ static int pwm_backlight_ofdata_to_platdata(struct udevice *dev)
 	debug("%s: start\n", __func__);
 	ret = uclass_get_device_by_phandle(UCLASS_REGULATOR, dev,
 					   "power-supply", &priv->reg);
-	if (ret) {
+	if (ret)
 		debug("%s: Cannot get power supply: ret=%d\n", __func__, ret);
-		return ret;
-	}
 	ret = gpio_request_by_name(dev, "enable-gpios", 0, &priv->enable,
 				   GPIOD_IS_OUT);
 	if (ret) {