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Commit b2f15ca6 authored by Simon Horman's avatar Simon Horman
Browse files

ARM: dts: lager: use demuxer for IIC1/I2C1 



Make it possible to select which I2C1 IP core you want to run on the
EXIO-A connector.

This is based on reference work for the I2C0 core of the lager board
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 1e26fcf3

arch/arm/boot/dts/r8a7790-lager.dts

+37 −2
Original line number Diff line number Diff line
@@ -50,7 +50,9 @@ 
	aliases {

		serial0 = &scif0;

		serial1 = &scifa1;

		i2c8 = &gpioi2c1;

		i2c10 = &i2cexio0;

		i2c11 = &i2cexio1;

	};



	chosen {
@@ -265,6 +267,17 @@ 
		clock-frequency = <148500000>;

	};



	gpioi2c1: i2c-8 {

		#address-cells = <1>;

		#size-cells = <0>;

		compatible = "i2c-gpio";

		status = "disabled";

		gpios = <&gpio1 17 GPIO_ACTIVE_HIGH /* sda */

			 &gpio1 16 GPIO_ACTIVE_HIGH /* scl */

			>;

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

	};



	/*

	 * IIC0/I2C0 is routed to EXIO connector A, pins 114 (SCL) + 116 (SDA) only.

	 * We use the I2C demuxer, so the desired IP core can be selected at runtime
@@ -283,6 +296,19 @@ 
		#address-cells = <1>;

		#size-cells = <0>;

	};



	/*

	 * IIC1/I2C1 is routed to EXIO connector A, pins 78 (SCL) + 80 (SDA).

	 * This is similar to the arangement described for i2cexio0 (above)

	 * with a fallback to GPIO also provided.

	 */

	i2cexio1: i2c-11 {

		compatible = "i2c-demux-pinctrl";

		i2c-parent = <&iic1>, <&i2c1>, <&gpioi2c1>;

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

		#address-cells = <1>;

		#size-cells = <0>;

	};

};



&du {
@@ -405,6 +431,11 @@ 
		function = "iic0";

	};



	i2c1_pins: i2c1 {

		groups = "i2c1";

		function = "i2c1";

	};



	iic1_pins: iic1 {

		groups = "iic1";

		function = "iic1";
@@ -606,10 +637,14 @@ 
	pinctrl-names = "i2c-exio0";

};



&i2c1	{

	pinctrl-0 = <&i2c1_pins>;

	pinctrl-names = "i2c-exio1";

};



&iic1	{

	status = "okay";

	pinctrl-0 = <&iic1_pins>;

	pinctrl-names = "default";

	pinctrl-names = "i2c-exio1";

};



&iic2	{