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video: pwm backlight: add backlight_disable() implement 

Change-Id: Ib574feedf431e34e5da49aae24a7ae0361945ac9
Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
This commit is contained in:
Joseph Chen 2017-10-30 17:44:39 +08:00
parent 91d246a3ae
commit 55519f2465
1 changed files with 35 additions and 0 deletions
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35
drivers/video/pwm_backlight.c
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@ -58,6 +58,40 @@ static int pwm_backlight_enable(struct udevice *dev)
return 0;
}
static int pwm_backlight_disable(struct udevice *dev)
{
struct pwm_backlight_priv *priv = dev_get_priv(dev);
struct dm_regulator_uclass_platdata *plat;
uint duty_cycle;
int ret;
duty_cycle = priv->period_ns * (priv->default_level - priv->min_level) /
(priv->max_level - priv->min_level + 1);
ret = pwm_set_config(priv->pwm, priv->channel, priv->period_ns,
duty_cycle);
if (ret)
return ret;
ret = pwm_set_enable(priv->pwm, priv->channel, false);
if (ret)
return ret;
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);
}
mdelay(120);
return 0;
}
static int pwm_backlight_ofdata_to_platdata(struct udevice *dev)
{
struct pwm_backlight_priv *priv = dev_get_priv(dev);
@ -118,6 +152,7 @@ static int pwm_backlight_probe(struct udevice *dev)
static const struct backlight_ops pwm_backlight_ops = {
.enable = pwm_backlight_enable,
.disable = pwm_backlight_disable,
};
static const struct udevice_id pwm_backlight_ids[] = {