diff options
| author | Uwe Kleine-König <uwe@kleine-koenig.org> | 2020-01-24 17:54:08 +0100 |
|---|---|---|
| committer | Pavel Machek <pavel@ucw.cz> | 2020-02-26 21:49:39 +0100 |
| commit | dd47a83453e4a5b0d6a91fe702b7fbc1984fb610 (patch) | |
| tree | 12d5eb0edf42e8fde7e8e6ca2837cdf85c6f81f4 | |
| parent | leds: pwm: simplify if condition (diff) | |
| download | linux-dd47a83453e4a5b0d6a91fe702b7fbc1984fb610.tar.xz linux-dd47a83453e4a5b0d6a91fe702b7fbc1984fb610.zip | |
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>
| -rw-r--r-- | drivers/leds/leds-pwm.c | 41 |
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) { |