The panel backlight is controlled through a GPIO and a PWM channel.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>
Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
arch/arm64/boot/dts/renesas/salvator-x.dtsi | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/arch/arm64/boot/dts/renesas/salvator-x.dtsi b/arch/arm64/boot/dts/renesas/salvator-x.dtsi
index fd2f6fa523ae..2e199302f93c 100644
--- a/arch/arm64/boot/dts/renesas/salvator-x.dtsi
+++ b/arch/arm64/boot/dts/renesas/salvator-x.dtsi
@@ -58,6 +58,16 @@
clock-frequency = <11289600>;
};
+ backlight: backlight {
+ compatible = "pwm-backlight";
+ pwms = <&pwm1 0 50000>;
+
+ brightness-levels = <256 128 64 16 8 4 0>;
+ default-brightness-level = <6>;
+
+ enable-gpios = <&gpio6 7 GPIO_ACTIVE_HIGH>;
+ };
+
reg_1p8v: regulator0 {
compatible = "regulator-fixed";
regulator-name = "fixed-1.8V";
@@ -453,6 +463,11 @@
function = "i2c2";
};
+ pwm1_pins: pwm {
+ groups = "pwm1_a";
+ function = "pwm1";
+ };
+
scif1_pins: scif1 {
groups = "scif1_data_a", "scif1_ctrl";
function = "scif1";
@@ -538,6 +553,13 @@
};
};
+&pwm1 {
+ pinctrl-0 = <&pwm1_pins>;
+ pinctrl-names = "default";
+
+ status = "okay";
+};
+
&rcar_sound {
pinctrl-0 = <&sound_pins &sound_clk_pins>;
pinctrl-names = "default";
--
Regards,
Laurent Pinchart
