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leds: pwm: Use pwm_get_args() where appropriate 

The PWM framework has clarified the concept of reference PWM config (the
platform dependent config retrieved from the DT or the PWM lookup table)
and real PWM state.

Use pwm_get_args() when the PWM user wants to retrieve this reference
config and not the current state.

This is part of the rework allowing the PWM framework to support
hardware readout and expose real PWM state even when the PWM has just
been requested (before the user calls pwm_config/enable/disable()).

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
This commit is contained in:
Boris Brezillon 2016-04-14 21:17:26 +02:00 committed by Thierry Reding
parent ad4e9fec14
commit 1b50673dfa
1 changed files with 10 additions and 1 deletions
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11
drivers/leds/leds-pwm.c
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@ -91,6 +91,7 @@ static int led_pwm_add(struct device *dev, struct led_pwm_priv *priv,
struct led_pwm *led, struct device_node *child)
{
struct led_pwm_data *led_data = &priv->leds[priv->num_leds];
struct pwm_args pargs;
int ret;
led_data->active_low = led->active_low;
@ -117,7 +118,15 @@ static int led_pwm_add(struct device *dev, struct led_pwm_priv *priv,
else
led_data->cdev.brightness_set_blocking = led_pwm_set_blocking;
led_data->period = pwm_get_period(led_data->pwm);
/*
* FIXME: pwm_apply_args() should be removed when switching to the
* atomic PWM API.
*/
pwm_apply_args(led_data->pwm);
pwm_get_args(led_data->pwm, &pargs);
led_data->period = pargs.period;
if (!led_data->period && (led->pwm_period_ns > 0))
led_data->period = led->pwm_period_ns;