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Commit be93275c authored by Wolfram Sang's avatar Wolfram Sang Committed by Simon Horman
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ARM: dts: koelsch: use demuxer for I2C4 



Make it possible to fallback to GPIO for I2C4 on the EXIO-E 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, fixed aliases, switched to named GPIOS, fixed pinmux for I2C4]
Signed-off-by: default avatarWolfram Sang <wsa+renesas@sang-engineering.com>
parent 168a7099

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

+34 −0
Original line number Diff line number Diff line
@@ -52,8 +52,10 @@ 
		serial1 = &scif1;

		i2c9 = &gpioi2c1;

		i2c10 = &gpioi2c2;

		i2c11 = &gpioi2c4;

		i2c12 = &i2cexio1;

		i2c13 = &i2chdmi;

		i2c14 = &i2cexio4;

	};



	chosen {
@@ -329,6 +331,16 @@ 
		i2c-gpio,delay-us = <5>;

	};



	gpioi2c4: i2c-11 {

		#address-cells = <1>;

		#size-cells = <0>;

		compatible = "i2c-gpio";

		status = "disabled";

		scl-gpios = <&gpio7 13 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;

		sda-gpios = <&gpio7 14 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;

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

	};



	/*

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

	 * A fallback to GPIO is provided.
@@ -437,6 +449,18 @@ 
			pagesize = <16>;

		};

	};



	/*

	 * I2C4 is routed to EXIO connector E, pins 37 (SCL) + 39 (SDA).

	 * A fallback to GPIO is provided.

	 */

	i2cexio4: i2c-14 {

		compatible = "i2c-demux-pinctrl";

		i2c-parent = <&i2c4>, <&gpioi2c4>;

		i2c-bus-name = "i2c-exio4";

		#address-cells = <1>;

		#size-cells = <0>;

	};

};



&du {
@@ -480,6 +504,11 @@ 
		function = "i2c2";

	};



	i2c4_pins: i2c4 {

		groups = "i2c4_c";

		function = "i2c4";

	};



	du_pins: du {

		groups = "du_rgb888", "du_sync", "du_disp", "du_clk_out_0";

		function = "du";
@@ -735,6 +764,11 @@ 
	clock-frequency = <100000>;

};



&i2c4 {

	pinctrl-0 = <&i2c4_pins>;

	pinctrl-names = "i2c-exio4";

};



&i2c6 {

	status = "okay";

	clock-frequency = <100000>;