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Commit 6723438b authored by Simon Horman's avatar Simon Horman
Browse files

ARM: dts: koelsch: use demuxer for I2C1 



Make it possible to fallback to GPIO for I2C1 on the EXIO-C connector.

This is based on reference work for the I2C0 core of the lager/r8a7790
by Wolfram Sang.

Signed-off-by: default avatarSimon Horman <horms+renesas@verge.net.au>
[wsa: rebased and fixed aliases]
Signed-off-by: default avatarWolfram Sang <wsa+renesas@sang-engineering.com>
parent b2f15ca6

arch/arm/boot/dts/r8a7791-koelsch.dts

+35 −0
Original line number Original line Diff line number Diff line
@@ -50,6 +50,8 @@ 
	aliases {

	aliases {

		serial0 = &scif0;

		serial0 = &scif0;

		serial1 = &scif1;

		serial1 = &scif1;

		i2c9 = &gpioi2c1;

		i2c12 = &i2cexio1;

	};

	};





	chosen {

	chosen {
@@ -298,6 +300,29 @@ 
		#clock-cells = <0>;

		#clock-cells = <0>;

		clock-frequency = <148500000>;

		clock-frequency = <148500000>;

	};

	};



	gpioi2c1: i2c-9 {

		#address-cells = <1>;

		#size-cells = <0>;

		compatible = "i2c-gpio";

		status = "disabled";

		gpios = <&gpio7 16 GPIO_ACTIVE_HIGH /* sda */

			 &gpio7 15 GPIO_ACTIVE_HIGH /* scl */

			>;

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

	};



	/*

	 * I2C1 is routed to EXIO connector B, pins 64 (SCL) + 66 (SDA).

	 * A fallback to GPIO is provided.

	 */

	i2cexio1: i2c-12 {

		compatible = "i2c-demux-pinctrl";

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

		i2c-bus-name = "i2c-exio1";

		#address-cells = <1>;

		#size-cells = <0>;

	};

};

};





&du {

&du {
@@ -333,6 +358,11 @@ 
	pinctrl-0 = <&scif_clk_pins>;

	pinctrl-0 = <&scif_clk_pins>;

	pinctrl-names = "default";

	pinctrl-names = "default";





	i2c1_pins: i2c1 {

		groups = "i2c1";

		function = "i2c1";

	};



	i2c2_pins: i2c2 {

	i2c2_pins: i2c2 {

		groups = "i2c2";

		groups = "i2c2";

		function = "i2c2";

		function = "i2c2";
@@ -581,6 +611,11 @@ 
	};

	};

};

};





&i2c1 {

	pinctrl-0 = <&i2c1_pins>;

	pinctrl-names = "i2c-exio1";

};



&i2c2 {

&i2c2 {

	pinctrl-0 = <&i2c2_pins>;

	pinctrl-0 = <&i2c2_pins>;

	pinctrl-names = "default";

	pinctrl-names = "default";