[PATCH v2 3/4] arm64: dts: amlogic: meson-s4-s905y4-khadas-vim1s: add PWM LED support

Nick Xie
2026-02-28T06:38:47Z

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@khadas.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.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 d36533f5559a8..0bd738c1e7862 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";