arm64: dts: renesas: beacon: Fix RGB Display PWM Backlight

The backlight didn't really work correctly due to some updates that were
made in hardware.  It should be safe to apply these, because the older
hardware was never shipped to anyone, so it shouldn't break anything.
Because the display driver refers to the display as DPI, this also
renames the backlight to use DPI for consistency.

Signed-off-by: Adam Ford <aford173@gmail.com>
Link: https://lore.kernel.org/r/20201213183759.223246-10-aford173@gmail.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

diff --git a/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi b/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi
index 12a9f14349836e2ac3f514cc1a409a80888067fc..1ab96ecc842b4beded587696721dca87b640b318 100644 (file)
--- a/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi
+++ b/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi
@@ -16,12 +16,12 @@
                default-brightness-level = <6>;
        };
 
-       backlight_rgb: backlight-rgb {
+       backlight_dpi: backlight-dpi {
                compatible = "pwm-backlight";
                power-supply = <&reg_lcd>;
                enable-gpios = <&gpio_exp1 7 GPIO_ACTIVE_LOW>;
-               pwms = <&pwm0 0 50000>;
-               brightness-levels = <0 4 8 16 32 64 128 255>;
+               pwms = <&pwm0 0 25000>;
+               brightness-levels = <0 25 33 50 63 75 88 100>;
                default-brightness-level = <6>;
        };
 
@@ -135,7 +135,7 @@
        rgb {
                /* Different LCD with compatible timings */
                compatible = "rocktech,rk070er9427";
-               backlight = <&backlight_rgb>;
+               backlight = <&backlight_dpi>;
                enable-gpios = <&gpio1 21 GPIO_ACTIVE_HIGH>;
                power-supply = <&reg_lcd>;
                port {