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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.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
This commit is contained in:
Kever Yang 2018-02-09 10:45:12 +08:00 committed by Anatolij Gustschin
parent 9ffa4d12a8
commit 19f124d829
1 changed files with 12 additions and 12 deletions
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24
drivers/video/pwm_backlight.c
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@ -32,16 +32,18 @@ static int pwm_backlight_enable(struct udevice *dev)
uint duty_cycle; uint duty_cycle;
int ret; int ret;
plat = dev_get_uclass_platdata(priv->reg); if (priv->reg) {
debug("%s: Enable '%s', regulator '%s'/'%s'\n", __func__, dev->name, plat = dev_get_uclass_platdata(priv->reg);
priv->reg->name, plat->name); debug("%s: Enable '%s', regulator '%s'/'%s'\n", __func__,
ret = regulator_set_enable(priv->reg, true); dev->name, priv->reg->name, plat->name);
if (ret) { ret = regulator_set_enable(priv->reg, true);
debug("%s: Cannot enable regulator for PWM '%s'\n", __func__, if (ret) {
dev->name); debug("%s: Cannot enable regulator for PWM '%s'\n",
return ret; __func__, dev->name);
return ret;
}
mdelay(120);
} }
mdelay(120);
duty_cycle = priv->period_ns * (priv->default_level - priv->min_level) / duty_cycle = priv->period_ns * (priv->default_level - priv->min_level) /
(priv->max_level - priv->min_level + 1); (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__); debug("%s: start\n", __func__);
ret = uclass_get_device_by_phandle(UCLASS_REGULATOR, dev, ret = uclass_get_device_by_phandle(UCLASS_REGULATOR, dev,
"power-supply", &priv->reg); "power-supply", &priv->reg);
if (ret) { if (ret)
debug("%s: Cannot get power supply: ret=%d\n", __func__, 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, ret = gpio_request_by_name(dev, "enable-gpios", 0, &priv->enable,
GPIOD_IS_OUT); GPIOD_IS_OUT);
if (ret) { if (ret) {