linux-kernel - [PATCH 3/6] arm64: dts: amlogic: meson-s4-s905y4-khadas-vim1s: add PWM LED support

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Message-Id: <20260123022258.136448-4-nick@khadas.com>
Date: Fri, 23 Jan 2026 10:22:55 +0800
From: Nick Xie <nick@...das.com>
To: neil.armstrong@...aro.org,
	khilman@...libre.com,
	jbrunet@...libre.com,
	martin.blumenstingl@...glemail.com,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-amlogic@...ts.infradead.org
Cc: krzk+dt@...nel.org,
	robh@...nel.org,
	conor+dt@...nel.org,
	xieqinick@...il.com,
	Nick Xie <nick@...das.com>
Subject: [PATCH 3/6] arm64: dts: amlogic: meson-s4-s905y4-khadas-vim1s: add PWM LED support

The Khadas VIM1S board features a white LED connected to the PWM_G
controller (PWM channel 0).

Enable the PWM_G controller and add the pwm-leds node to support
using this LED as a heartbeat indicator.

Signed-off-by: Nick Xie <nick@...das.com>
---
 .../amlogic/meson-s4-s905y4-khadas-vim1s.dts  | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-s4-s905y4-khadas-vim1s.dts b/arch/arm64/boot/dts/amlogic/meson-s4-s905y4-khadas-vim1s.dts
index 041291999bc8c..4bae6d46defb5 100644
--- a/arch/arm64/boot/dts/amlogic/meson-s4-s905y4-khadas-vim1s.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-s4-s905y4-khadas-vim1s.dts
@@ -6,6 +6,7 @@
 /dts-v1/;
 
 #include "meson-s4.dtsi"
+#include <dt-bindings/leds/common.h>
 
 / {
 	model = "Khadas VIM1S";
@@ -43,6 +44,18 @@ emmc_pwrseq: emmc-pwrseq {
 		reset-gpios = <&gpio GPIOB_9 GPIO_ACTIVE_LOW>;
 	};
 
+	pwm-leds {
+		compatible = "pwm-leds";
+
+		led-1 {
+			color = <LED_COLOR_ID_WHITE>;
+			function = LED_FUNCTION_STATUS;
+			linux,default-trigger = "heartbeat";
+			max-brightness = <255>;
+			pwms = <&pwm_gh 0 30040 0>;
+		};
+	};
+
 	sdio_32k: sdio-32k {
 		compatible = "pwm-clock";
 		#clock-cells = <0>;
@@ -196,6 +209,12 @@ &pwm_ef {
 	pinctrl-names = "default";
 };
 
+&pwm_gh {
+	status = "okay";
+	pinctrl-0 = <&pwm_g_pins1>;
+	pinctrl-names = "default";
+};
+
 &pwm_ij {
 	status = "okay";
 };
-- 
2.34.1