Commit ee508454 authored by AngeloGioacchino Del Regno's avatar AngeloGioacchino Del Regno Committed by Matthias Brugger
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arm64: dts: mediatek: cherry: Add configuration for display backlight 



Configure the hardware PWM for the integrated display's backlight:
all Cherry devices enable the backlight with GPIO82 and manage the
PWM via MediaTek disp-pwm on GPIO97.

Signed-off-by: default avatarAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: default avatarChen-Yu Tsai <wenst@chromium.org>
Tested-by: default avatarChen-Yu Tsai <wenst@chromium.org>
Link: https://lore.kernel.org/r/20230223145426.193590-5-angelogioacchino.delregno@collabora.com


Signed-off-by: default avatarMatthias Brugger <matthias.bgg@gmail.com>
parent b86b9464

arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi

+24 −0
Original line number Diff line number Diff line
@@ -22,6 +22,16 @@ 
		serial0 = &uart0;

	};



	backlight_lcd0: backlight-lcd0 {

		compatible = "pwm-backlight";

		brightness-levels = <0 1023>;

		default-brightness-level = <576>;

		enable-gpios = <&pio 82 GPIO_ACTIVE_HIGH>;

		num-interpolated-steps = <1023>;

		pwms = <&disp_pwm0 0 500000>;

		power-supply = <&ppvar_sys>;

	};



	chosen {

		stdout-path = "serial0:115200n8";

	};
@@ -212,6 +222,13 @@ 
	};

};



&disp_pwm0 {

	status = "okay";



	pinctrl-names = "default";

	pinctrl-0 = <&disp_pwm0_pin_default>;

};



&dp_tx {

	status = "okay";
@@ -653,6 +670,13 @@ 
		};

	};



	disp_pwm0_pin_default: disp-pwm0-default-pins {

		pins-disp-pwm {

			pinmux = <PINMUX_GPIO82__FUNC_GPIO82>,

				 <PINMUX_GPIO97__FUNC_DISP_PWM0>;

		};

	};



	dptx_pin: dptx-default-pins {

		pins-cmd-dat {

			pinmux = <PINMUX_GPIO18__FUNC_DP_TX_HPD>;