[PATCH v2 6/8] arm64: dts: r8a7795: salvator-x: Add panel backlight support

[Ulrich Hecht]

From: Laurent Pinchart <laurent.pinchart+rene...@ideasonboard.com>

The panel backlight is controlled through a GPIO and a PWM channel.

Signed-off-by: Laurent Pinchart <laurent.pinchart+rene...@ideasonboard.com>
---
 arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts 
b/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts
index bf4674e..8558b27 100644
--- a/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts
+++ b/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts
@@ -280,6 +280,16 @@
                        };
                };
        };
+
+       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>;
+       };
 };
 
 &du {
@@ -366,6 +376,11 @@
                function = "du";
        };
 
+       pwm1_pins: pwm {
+               groups = "pwm1_a";
+               function = "pwm1";
+       };
+
        sdhi0_pins: sd0 {
                groups = "sdhi0_data4", "sdhi0_ctrl";
                function = "sdhi0";
@@ -441,6 +456,13 @@
        };
 };
 
+&pwm1 {
+       pinctrl-0 = <&pwm1_pins>;
+       pinctrl-names = "default";
+
+       status = "okay";
+};
+
 &scif1 {
        pinctrl-0 = <&scif1_pins>;
        pinctrl-names = "default";
-- 
2.7.4