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

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Message-Id: <20251101-openwrt-one-network-v2-15-2a162b9eea91@collabora.com>
Date: Sat, 01 Nov 2025 14:33:00 +0100
From: Sjoerd Simons <sjoerd@...labora.com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Matthias Brugger <matthias.bgg@...il.com>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
 Ryder Lee <ryder.lee@...iatek.com>, 
 Jianjun Wang <jianjun.wang@...iatek.com>, 
 Bjorn Helgaas <bhelgaas@...gle.com>, 
 Lorenzo Pieralisi <lpieralisi@...nel.org>, 
 Krzysztof Wilczyński <kwilczynski@...nel.org>, 
 Manivannan Sadhasivam <mani@...nel.org>, 
 Chunfeng Yun <chunfeng.yun@...iatek.com>, Vinod Koul <vkoul@...nel.org>, 
 Kishon Vijay Abraham I <kishon@...nel.org>, Lee Jones <lee@...nel.org>, 
 Andrew Lunn <andrew+netdev@...n.ch>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Lorenzo Bianconi <lorenzo@...nel.org>, Felix Fietkau <nbd@....name>
Cc: kernel@...labora.com, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-mediatek@...ts.infradead.org, linux-pci@...r.kernel.org, 
 linux-phy@...ts.infradead.org, netdev@...r.kernel.org, 
 Daniel Golle <daniel@...rotopia.org>, Bryan Hinton <bryan@...anhinton.com>, 
 Sjoerd Simons <sjoerd@...labora.com>
Subject: [PATCH v2 15/15] arm64: dts: mediatek: mt7981b-openwrt-one: Enable
 software leds

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@...labora.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@...00000 {
 		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@...1e000 {
 			#clock-cells = <1>;
 		};

-		pwm@...48000 {
+		pwm: pwm@...48000 {
 			compatible = "mediatek,mt7981-pwm";
 			reg = <0 0x10048000 0 0x1000>;
 			clocks = <&infracfg CLK_INFRA_PWM_STA>,

-- 
2.51.0