The Spherion board has keyboard backlight controlled by the PWM signal
generated by the ChromeOS EC.
Enable PWM output for ChromeOS EC and add a PWM controlled LED node for
the keyboard backlight.
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@xxxxxxxxxxxxx>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
---
.../dts/mediatek/mt8192-asurada-spherion-r0.dts | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/arch/arm64/boot/dts/mediatek/mt8192-asurada-spherion-r0.dts b/arch/arm64/boot/dts/mediatek/mt8192-asurada-spherion-r0.dts
index 20ae4a869c63..b9dd5fd2e964 100644
--- a/arch/arm64/boot/dts/mediatek/mt8192-asurada-spherion-r0.dts
+++ b/arch/arm64/boot/dts/mediatek/mt8192-asurada-spherion-r0.dts
@@ -4,12 +4,28 @@
*/
/dts-v1/;
#include "mt8192-asurada.dtsi"
+#include <dt-bindings/leds/common.h>
/ {
model = "MediaTek Spherion (rev0 - 3)";
compatible = "google,spherion-rev3", "google,spherion-rev2",
"google,spherion-rev1", "google,spherion-rev0",
"google,spherion", "mediatek,mt8192";
+
+ pwmleds {
+ compatible = "pwm-leds";
+
+ led {
+ function = LED_FUNCTION_KBD_BACKLIGHT;
+ color = <LED_COLOR_ID_WHITE>;
+ pwms = <&cros_ec_pwm 0>;
+ max-brightness = <1023>;
+ };
+ };
+};
+
+&cros_ec_pwm {
+ status = "okay";
};
&touchscreen {
--
2.35.1
