[PATCH v2 15/15] arm64: dts: mediatek: mt7981b-openwrt-one: Enable software leds

Sjoerd Simons
2025-11-01T13:33:32Z

The openwrt has 3 status leds at the front:
* red: Used as failsafe led by openwrt
* white: Used as boot led by openwrt
* green: Used as running/upgrade led by openwrt

On the back each RJ45 jack has the typical amber/green leds. For the WAN
jack this is hardware controlled by the phy, for LAN these are under
software control and enabled by this patch.

Signed-off-by: Sjoerd Simons <sjoerd@collabora.com>
---
V1 -> V2:
- Improve commit message
- Re-order nodes to be alphabetical
---
.../boot/dts/mediatek/mt7981b-openwrt-one.dts | 57 ++++++++++++++++++++++
arch/arm64/boot/dts/mediatek/mt7981b.dtsi | 2 +-
2 files changed, 58 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/mediatek/mt7981b-openwrt-one.dts b/arch/arm64/boot/dts/mediatek/mt7981b-openwrt-one.dts
index b13f16d7816bf..b308b7ad4945d 100644
--- a/arch/arm64/boot/dts/mediatek/mt7981b-openwrt-one.dts
+++ b/arch/arm64/boot/dts/mediatek/mt7981b-openwrt-one.dts
@@ -26,6 +26,50 @@ memory@40000000 {
device_type = "memory";
};

+ pwm-leds {
+ compatible = "pwm-leds";
+
+ led-0 {
+ color = <LED_COLOR_ID_WHITE>;
+ default-brightness = <0>;
+ function = LED_FUNCTION_STATUS;
+ max-brightness = <255>;
+ pwms = <&pwm 0 10000>;
+ };
+
+ led-1 {
+ color = <LED_COLOR_ID_GREEN>;
+ default-brightness = <0>;
+ function = LED_FUNCTION_STATUS;
+ max-brightness = <255>;
+ pwms = <&pwm 1 10000>;
+ };
+ };
+
+ gpio-leds {
+ compatible = "gpio-leds";
+
+ led-0 {
+ color = <LED_COLOR_ID_RED>;
+ function = LED_FUNCTION_STATUS;
+ gpios = <&pio 9 GPIO_ACTIVE_HIGH>;
+ };
+
+ led-1 {
+ color = <LED_COLOR_ID_AMBER>;
+ function = LED_FUNCTION_LAN;
+ gpios = <&pio 34 GPIO_ACTIVE_LOW>;
+ linux,default-trigger = "netdev";
+ };
+
+ led-2 {
+ color = <LED_COLOR_ID_GREEN>;
+ function = LED_FUNCTION_LAN;
+ gpios = <&pio 35 GPIO_ACTIVE_LOW>;
+ linux,default-trigger = "netdev";
+ };
+ };
+
reg_3p3v: regulator-3p3v {
compatible = "regulator-fixed";
regulator-name = "fixed-3.3V";
@@ -111,6 +155,13 @@ mux {
};
};

+ pwm_pins: pwm-pins {
+ mux {
+ function = "pwm";
+ groups = "pwm0_0", "pwm1_1";
+ };
+ };
+
spi2_flash_pins: spi2-pins {
mux {
function = "spi";
@@ -147,6 +198,12 @@ conf {
};
};

+&pwm {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pwm_pins>;
+ status = "okay";
+};
+
&spi2 {
pinctrl-names = "default";
pinctrl-0 = <&spi2_flash_pins>;
diff --git a/arch/arm64/boot/dts/mediatek/mt7981b.dtsi b/arch/arm64/boot/dts/mediatek/mt7981b.dtsi
index 17dd13d4c0015..66d89495bac52 100644
--- a/arch/arm64/boot/dts/mediatek/mt7981b.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt7981b.dtsi
@@ -126,7 +126,7 @@ apmixedsys: clock-controller@1001e000 {
#clock-cells = <1>;
};

- pwm@10048000 {
+ pwm: pwm@10048000 {
compatible = "mediatek,mt7981-pwm";
reg = <0 0x10048000 0 0x1000>;
clocks = <&infracfg CLK_INFRA_PWM_STA>,

--
2.51.0