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 ---

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) {