Commit 3dd7ed58 authored by Emil Renner Berthing's avatar Emil Renner Berthing Committed by Pavel Machek
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leds: pwm-multicolor: Support active-low LEDs 



Add support for LEDs wired up to light when the PWM output is low, just
like the regular PWM LEDs.

Signed-off-by: default avatarEmil Renner Berthing <emil.renner.berthing@canonical.com>
Reviewed-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: default avatarPavel Machek <pavel@ucw.cz>
parent 83543c6e

drivers/leds/rgb/leds-pwm-multicolor.c

+5 −0
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ 
struct pwm_led {

	struct pwm_device *pwm;

	struct pwm_state state;

	bool active_low;

};



struct pwm_mc_led {
@@ -45,6 +46,9 @@ static int led_pwm_mc_set(struct led_classdev *cdev, 
		duty *= mc_cdev->subled_info[i].brightness;

		do_div(duty, cdev->max_brightness);



		if (priv->leds[i].active_low)

			duty = priv->leds[i].state.period - duty;



		priv->leds[i].state.duty_cycle = duty;

		priv->leds[i].state.enabled = duty > 0;

		ret = pwm_apply_state(priv->leds[i].pwm,
@@ -76,6 +80,7 @@ static int iterate_subleds(struct device *dev, struct pwm_mc_led *priv, 
			goto release_fwnode;

		}

		pwm_init_state(pwmled->pwm, &pwmled->state);

		pwmled->active_low = fwnode_property_read_bool(fwnode, "active-low");



		ret = fwnode_property_read_u32(fwnode, "color", &color);

		if (ret) {