Control the Chromecast's two LEDs using PWM instead of GPIO pins. This
allows for variable brightness.
Signed-off-by: Thomas Hebb <tommyhebb@xxxxxxxxx>
---
.../boot/dts/berlin2cd-google-chromecast.dts | 20 ++++++++++++++-----
1 file changed, 15 insertions(+), 5 deletions(-)
diff --git a/arch/arm/boot/dts/berlin2cd-google-chromecast.dts b/arch/arm/boot/dts/berlin2cd-google-chromecast.dts
index 54221f55bfa2..fb71e5436420 100644
--- a/arch/arm/boot/dts/berlin2cd-google-chromecast.dts
+++ b/arch/arm/boot/dts/berlin2cd-google-chromecast.dts
@@ -66,18 +66,21 @@
};
leds {
- compatible = "gpio-leds";
+ compatible = "pwm-leds";
+ pinctrl-0 = <&ledpwm_pmux>;
+ pinctrl-names = "default";
white {
label = "white";
- gpios = <&portc 1 GPIO_ACTIVE_HIGH>;
- default-state = "keep";
+ pwms = <&pwm 0 600000 0>;
+ max-brightness = <255>;
+ linux,default-trigger = "default-on";
};
red {
label = "red";
- gpios = <&portc 2 GPIO_ACTIVE_HIGH>;
- default-state = "keep";
+ pwms = <&pwm 1 600000 0>;
+ max-brightness = <255>;
};
};
};
@@ -96,3 +99,10 @@
&usb_phy1 { status = "okay"; };
&usb1 { status = "okay"; };
+
+&soc_pinctrl {
+ ledpwm_pmux: ledpwm-pmux {
+ groups = "G0";
+ function = "pwm";
+ };
+};
--
2.17.0
--
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