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pwm-backlight: make power-supply as option 

Some pwm backlight may not need 'power-supply', let's make it as option
in pwm-backlight driver.

Change-Id: Ie25ab972b352cd66670fdccfdee45fa1199741ed
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
This commit is contained in:
Kever Yang 2018-02-08 20:07:48 +08:00
parent 75de74fe73
commit ca62cda228
1 changed files with 22 additions and 20 deletions
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42
drivers/video/pwm_backlight.c
View File

@ -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);
@ -79,15 +81,17 @@ static int pwm_backlight_disable(struct udevice *dev)
mdelay(10);
dm_gpio_set_value(&priv->enable, 0);
plat = dev_get_uclass_platdata(priv->reg);
printf("%s: Disable '%s', regulator '%s'/'%s'\n", __func__, dev->name,
priv->reg->name, plat->name);
ret = regulator_set_enable(priv->reg, false);
if (ret) {
debug("%s: Cannot enable regulator for PWM '%s'\n", __func__,
dev->name);
if (priv->reg) {
plat = dev_get_uclass_platdata(priv->reg);
debug("%s: Disable '%s', regulator '%s'/'%s'\n", __func__,
dev->name, priv->reg->name, plat->name);
ret = regulator_set_enable(priv->reg, false);
if (ret) {
debug("%s: Cannot enable regulator for PWM '%s'\n",
__func__, dev->name);
}
mdelay(120);
}
mdelay(120);
return 0;
}
@ -102,10 +106,8 @@ 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) {