The panel backlight is controlled through a GPIO and a PWM channel.
Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@xxxxxxxxx>
---
arch/arm64/boot/dts/renesas/r8a7796-salvator-x.dts | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/arch/arm64/boot/dts/renesas/r8a7796-salvator-x.dts b/arch/arm64/boot/dts/renesas/r8a7796-salvator-x.dts
index 14d9e51..abda84c 100644
--- a/arch/arm64/boot/dts/renesas/r8a7796-salvator-x.dts
+++ b/arch/arm64/boot/dts/renesas/r8a7796-salvator-x.dts
@@ -133,6 +133,11 @@
function = "i2c2";
};
+ pwm1_pins: pwm {
+ groups = "pwm1_a";
+ function = "pwm1";
+ };
+
sdhi0_pins: sd0 {
groups = "sdhi0_data4", "sdhi0_ctrl";
function = "sdhi0";
@@ -183,6 +188,16 @@
interrupt-parent = <&gpio2>;
interrupts = <11 IRQ_TYPE_LEVEL_LOW>;
};
+
+ 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>;
+ };
};
&extal_clk {
@@ -235,6 +250,13 @@
status = "okay";
};
+&pwm1 {
+ pinctrl-0 = <&pwm1_pins>;
+ pinctrl-names = "default";
+
+ status = "okay";
+};
+
&scif1 {
pinctrl-0 = <&scif1_pins>;
pinctrl-names = "default";
--
2.7.4
