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authorUwe Kleine-König <uwe@kleine-koenig.org>2020-01-24 17:54:08 +0100
committerPavel Machek <pavel@ucw.cz>2020-02-26 21:49:39 +0100
commitdd47a83453e4a5b0d6a91fe702b7fbc1984fb610 (patch)
tree12d5eb0edf42e8fde7e8e6ca2837cdf85c6f81f4 /drivers/leds
parentb43a8f01fccbfdddbc7f9b2bbad11b7db3fda4e1 (diff)
downloadlinux-dd47a83453e4a5b0d6a91fe702b7fbc1984fb610.tar.bz2
leds: pwm: convert to atomic PWM API
pwm_config(), pwm_enable() and pwm_disable() should get removed in the long run. So update the driver to use the atomic API that is here to stay. A few side effects: - led_pwm_set() now returns an error when setting the PWM fails. - During .probe() the PWM isn't disabled implicitly by pwm_apply_args() any more. Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org> Tested-by: Jeff LaBundy <jeff@labundy.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
Diffstat (limited to 'drivers/leds')
-rw-r--r--drivers/leds/leds-pwm.c41
1 files changed, 9 insertions, 32 deletions
diff --git a/drivers/leds/leds-pwm.c b/drivers/leds/leds-pwm.c
index b72fd89ff390..9111cdede0ee 100644
--- a/drivers/leds/leds-pwm.c
+++ b/drivers/leds/leds-pwm.c
@@ -22,9 +22,8 @@
struct led_pwm_data {
struct led_classdev cdev;
struct pwm_device *pwm;
+ struct pwm_state pwmstate;
unsigned int active_low;
- unsigned int period;
- int duty;
};
struct led_pwm_priv {
@@ -32,44 +31,29 @@ struct led_pwm_priv {
struct led_pwm_data leds[0];
};
-static void __led_pwm_set(struct led_pwm_data *led_dat)
-{
- int new_duty = led_dat->duty;
-
- pwm_config(led_dat->pwm, new_duty, led_dat->period);
-
- if (new_duty == 0)
- pwm_disable(led_dat->pwm);
- else
- pwm_enable(led_dat->pwm);
-}
-
static int led_pwm_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
struct led_pwm_data *led_dat =
container_of(led_cdev, struct led_pwm_data, cdev);
unsigned int max = led_dat->cdev.max_brightness;
- unsigned long long duty = led_dat->period;
+ unsigned long long duty = led_dat->pwmstate.period;
duty *= brightness;
do_div(duty, max);
if (led_dat->active_low)
- duty = led_dat->period - duty;
-
- led_dat->duty = duty;
-
- __led_pwm_set(led_dat);
+ duty = led_dat->pwmstate.period - duty;
- return 0;
+ led_dat->pwmstate.duty_cycle = duty;
+ led_dat->pwmstate.enabled = duty > 0;
+ return pwm_apply_state(led_dat->pwm, &led_dat->pwmstate);
}
static int led_pwm_add(struct device *dev, struct led_pwm_priv *priv,
struct led_pwm *led, struct fwnode_handle *fwnode)
{
struct led_pwm_data *led_data = &priv->leds[priv->num_leds];
- struct pwm_args pargs;
int ret;
led_data->active_low = led->active_low;
@@ -93,17 +77,10 @@ static int led_pwm_add(struct device *dev, struct led_pwm_priv *priv,
led_data->cdev.brightness_set_blocking = led_pwm_set;
- /*
- * 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);
+ pwm_init_state(led_data->pwm, &led_data->pwmstate);
- led_data->period = pargs.period;
- if (!led_data->period)
- led_data->period = led->pwm_period_ns;
+ if (!led_data->pwmstate.period)
+ led_data->pwmstate.period = led->pwm_period_ns;
ret = devm_led_classdev_register(dev, &led_data->cdev);
if (ret == 0) {