Some pwm backlight may not need 'power-supply', let's make it as option
in pwm-backlight driver.
Signed-off-by: Kever Yang <kever.y...@rock-chips.com>
---
drivers/video/pwm_backlight.c | 24 ++++++++++++------------
1 file changed, 12 insertions(+), 12 deletions(-)
diff --git a/drivers/video/pwm_backlight.c b/drivers/video/pwm_backlight.c
index fbd7bf7..f40e57b 100644
--- a/drivers/video/pwm_backlight.c
+++ b/drivers/video/pwm_backlight.c
@@ -32,16 +32,18 @@ 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 +70,8 @@ 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) {
--
1.9.1
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