With the commit 4fcba5d556b4 ("regulator: implement basic reference counter") the return value of regulator_set_enable may be EALREADY or EBUSY for fixed/gpio regulators and may be further expanded on all regulators.
Change to use the more relaxed regulator_set_enable_if_allowed to continue if regulator already was enabled or disabled.
Signed-off-by: Svyatoslav Ryhel clamor95@gmail.com --- drivers/video/pwm_backlight.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-)
diff --git a/drivers/video/pwm_backlight.c b/drivers/video/pwm_backlight.c index aa0e292866..1c747d98d7 100644 --- a/drivers/video/pwm_backlight.c +++ b/drivers/video/pwm_backlight.c @@ -100,8 +100,8 @@ static int enable_sequence(struct udevice *dev, int seq) plat = dev_get_uclass_plat(priv->reg); log_debug("Enable '%s', regulator '%s'/'%s'\n", dev->name, priv->reg->name, plat->name); - ret = regulator_set_enable(priv->reg, true); - if (ret) { + ret = regulator_set_enable_if_allowed(priv->reg, true); + if (ret && ret != -ENOSYS) { log_debug("Cannot enable regulator for PWM '%s'\n", dev->name); return log_ret(ret); @@ -181,11 +181,10 @@ static int pwm_backlight_set_brightness(struct udevice *dev, int percent) } if (disable) { dm_gpio_set_value(&priv->enable, 0); - if (priv->reg) { - ret = regulator_set_enable(priv->reg, false); - if (ret) - return log_ret(ret); - } + ret = regulator_set_enable_if_allowed(priv->reg, false); + if (ret && ret != -ENOSYS) + return log_ret(ret); + priv->enabled = false; }