[PATCH v2] ARM: dts: r8a7742-iwg21d-q7: Add LCD support

[Laurent Pinchart]

Hi Prabhakar,

Thank you for the patch.

On Thu, Aug 13, 2020 at 03:00:41PM +0100, Lad Prabhakar wrote:
> The iwg21d comes with a 7" capacitive touch screen, therefore
> add support for it.
> 
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj at bp.renesas.com>
> Reviewed-by: Marian-Cristian Rotariu <marian-cristian.rotariu.rb at bp.renesas.com>

Everything seems to match the schematics :-)

Reviewed-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>

> ---
> v1->v2
> * This patch is part of series [1] (rest of the patches have be accepted
>   by Geert [2]).
> * Added regulator for lvds
> * Added reset pin for touchpanel
> * This patch is based on series [3]
> 
> [1] https://patchwork.kernel.org/project/linux-renesas-soc/list/
>     ?series=330277
> [2] https://git.kernel.org/pub/scm/linux/kernel/git/geert/
>     renesas-devel.git/log/?h=renesas-arm-dt-for-v5.10
> [3] https://patchwork.kernel.org/project/linux-renesas-soc/list/
>     ?series=330957
> ---
>  arch/arm/boot/dts/r8a7742-iwg21d-q7.dts | 99 +++++++++++++++++++++++++
>  1 file changed, 99 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/r8a7742-iwg21d-q7.dts b/arch/arm/boot/dts/r8a7742-iwg21d-q7.dts
> index b3461a61a4bf..9bf4fbd9c736 100644
> --- a/arch/arm/boot/dts/r8a7742-iwg21d-q7.dts
> +++ b/arch/arm/boot/dts/r8a7742-iwg21d-q7.dts
> @@ -30,6 +30,7 @@
>  
>  /dts-v1/;
>  #include "r8a7742-iwg21m.dtsi"
> +#include <dt-bindings/pwm/pwm.h>
>  
>  / {
>  	model = "iWave Systems RainboW-G21D-Qseven board based on RZ/G1H";
> @@ -52,6 +53,51 @@
>  		clock-frequency = <26000000>;
>  	};
>  
> +	lcd_backlight: backlight {
> +		compatible = "pwm-backlight";
> +		pwms = <&tpu 2 5000000 0>;
> +		brightness-levels = <0 4 8 16 32 64 128 255>;
> +		pinctrl-0 = <&backlight_pins>;
> +		pinctrl-names = "default";
> +		default-brightness-level = <7>;
> +		enable-gpios = <&gpio3 11 GPIO_ACTIVE_HIGH>;
> +	};
> +
> +	lvds-receiver {
> +		compatible = "ti,ds90cf384a", "lvds-decoder";
> +		vcc-supply = <&vcc_3v3_tft1>;
> +
> +		ports {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +
> +			port at 0 {
> +				reg = <0>;
> +				lvds_receiver_in: endpoint {
> +					remote-endpoint = <&lvds0_out>;
> +				};
> +			};
> +			port at 1 {
> +				reg = <1>;
> +				lvds_receiver_out: endpoint {
> +					remote-endpoint = <&panel_in>;
> +				};
> +			};
> +		};
> +	};
> +
> +	panel {
> +		compatible = "edt,etm0700g0dh6";
> +		backlight = <&lcd_backlight>;
> +		power-supply = <&vcc_3v3_tft1>;
> +
> +		port {
> +			panel_in: endpoint {
> +				remote-endpoint = <&lvds_receiver_out>;
> +			};
> +		};
> +	};
> +
>  	reg_1p5v: 1p5v {
>  		compatible = "regulator-fixed";
>  		regulator-name = "1P5V";
> @@ -75,6 +121,17 @@
>  		};
>  	};
>  
> +	vcc_3v3_tft1: regulator-panel {
> +		compatible = "regulator-fixed";
> +
> +		regulator-name = "vcc-3v3-tft1";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		enable-active-high;
> +		startup-delay-us = <500>;
> +		gpio = <&gpio5 28 GPIO_ACTIVE_HIGH>;
> +	};
> +
>  	vcc_sdhi2: regulator-vcc-sdhi2 {
>  		compatible = "regulator-fixed";
>  
> @@ -129,12 +186,34 @@
>  		VDDIO-supply = <&reg_3p3v>;
>  		VDDD-supply = <&reg_1p5v>;
>  	};
> +
> +	touch: touchpanel at 38 {
> +		compatible = "edt,edt-ft5406";
> +		reg = <0x38>;
> +		interrupt-parent = <&gpio0>;
> +		interrupts = <24 IRQ_TYPE_EDGE_FALLING>;
> +		/* GP1_29 is also shared with audio codec reset pin */
> +		reset-gpios = <&gpio1 29 GPIO_ACTIVE_LOW>;
> +		vcc-supply = <&vcc_3v3_tft1>;
> +	};
>  };
>  
>  &cmt0 {
>  	status = "okay";
>  };
>  
> +&du {
> +	status = "okay";
> +};
> +
> +&gpio0 {
> +	touch-interrupt {
> +		gpio-hog;
> +		gpios = <24 GPIO_ACTIVE_LOW>;
> +		input;
> +	};
> +};
> +
>  &hsusb {
>  	pinctrl-0 = <&usb0_pins>;
>  	pinctrl-names = "default";
> @@ -165,6 +244,11 @@
>  		function = "avb";
>  	};
>  
> +	backlight_pins: backlight {
> +		groups = "tpu0_to2";
> +		function = "tpu0";
> +	};
> +
>  	i2c2_pins: i2c2 {
>  		groups = "i2c2_b";
>  		function = "i2c2";
> @@ -208,6 +292,17 @@
>  	};
>  };
>  
> +&lvds0 {
> +	status = "okay";
> +	ports {
> +		port at 1 {
> +			lvds0_out: endpoint {
> +				remote-endpoint = <&lvds_receiver_in>;
> +			};
> +		};
> +	};
> +};
> +
>  &rcar_sound {
>  	pinctrl-0 = <&sound_pins>;
>  	pinctrl-names = "default";
> @@ -261,6 +356,10 @@
>  	shared-pin;
>  };
>  
> +&tpu {
> +	status = "okay";
> +};
> +
>  &usbphy {
>  	status = "okay";
>  };

-- 
Regards,

Laurent Pinchart