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Commit 61866d7f authored by Wolfram Sang's avatar Wolfram Sang Committed by Simon Horman
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ARM: dts: alt: use demuxer for I2C1 



Create a separate bus for HDMI related I2C1 and provide fallback to GPIO.

Based on work for the r8a7790/lager by Wolfram Sang.

Signed-off-by: default avatarSimon Horman <horms+renesas@verge.net.au>
[wsa: rebased, fixed aliases, switched to named GPIOs]
Signed-off-by: default avatarWolfram Sang <wsa+renesas@sang-engineering.com>
parent 12937bff

arch/arm/boot/dts/r8a7794-alt.dts

+37 −16
Original line number Diff line number Diff line
@@ -18,7 +18,9 @@ 


	aliases {

		serial0 = &scif2;

		i2c9 = &gpioi2c1;

		i2c10 = &gpioi2c4;

		i2c11 = &i2chdmi;

		i2c12 = &i2cexio4;

	};
@@ -138,16 +140,49 @@ 
		clock-frequency = <148500000>;

	};



	gpioi2c1: i2c-9 {

		#address-cells = <1>;

		#size-cells = <0>;

		compatible = "i2c-gpio";

		status = "disabled";

		scl-gpios = <&gpio4 0 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;

		sda-gpios = <&gpio4 1 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;

	};



	gpioi2c4: i2c-10 {

		#address-cells = <1>;

		#size-cells = <0>;

		compatible = "i2c-gpio";

		status = "disabled";

		sda-gpios = <&gpio4 9 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;

		scl-gpios = <&gpio4 8 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;

		sda-gpios = <&gpio4 9 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;

		i2c-gpio,delay-us = <5>;

	};



	/*

	 * A fallback to GPIO is provided for I2C1.

	 */

	i2chdmi: i2c-11 {

		compatible = "i2c-demux-pinctrl";

		i2c-parent = <&i2c1>, <&gpioi2c1>;

		i2c-bus-name = "i2c-hdmi";

		#address-cells = <1>;

		#size-cells = <0>;



		composite-in@20 {

			compatible = "adi,adv7180";

			reg = <0x20>;

			remote = <&vin0>;



			port {

				adv7180: endpoint {

					bus-width = <8>;

					remote-endpoint = <&vin0ep>;

				};

			};

		};

	};



	/*

	 * I2C4 is routed to EXIO connector B, pins 73 (SCL) + 74 (SDA).

	 * A fallback to GPIO is provided.
@@ -324,23 +359,9 @@ 


&i2c1 {

	pinctrl-0 = <&i2c1_pins>;

	pinctrl-names = "default";

	pinctrl-names = "i2c-hdmi";



	status = "okay";

	clock-frequency = <400000>;



	composite-in@20 {

		compatible = "adi,adv7180";

		reg = <0x20>;

		remote = <&vin0>;



		port {

			adv7180: endpoint {

				bus-width = <8>;

				remote-endpoint = <&vin0ep>;

			};

		};

	};

};



&i2c4 {