diff options
| author |   Emil Renner Berthing <emil.renner.berthing@canonical.com> | 2022-07-05 23:01:42 +0200 |
|---|---|---|
| committer |   Pavel Machek <pavel@ucw.cz> | 2022-07-17 13:02:09 +0200 |
| commit | 3dd7ed589f2eda3904ab4b9fc49bbbc6d450d7f3 (patch) | |
| tree | 0d676c1067688c3d44f8afc9df6d8ef5788805d7 /drivers/leds | |
| parent | dt-bindings: leds: pwm-multicolor: Add active-low property (diff) | |
| download | linux-dev-3dd7ed589f2eda3904ab4b9fc49bbbc6d450d7f3.tar.xz linux-dev-3dd7ed589f2eda3904ab4b9fc49bbbc6d450d7f3.zip | |
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: Emil Renner Berthing <emil.renner.berthing@canonical.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
Diffstat (limited to 'drivers/leds')
| -rw-r--r-- | drivers/leds/rgb/leds-pwm-multicolor.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/leds/rgb/leds-pwm-multicolor.c b/drivers/leds/rgb/leds-pwm-multicolor.c index eb67b89d28e9..da9d2218ae18 100644 --- a/drivers/leds/rgb/leds-pwm-multicolor.c +++ b/drivers/leds/rgb/leds-pwm-multicolor.c @@ -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) { |