Commit 880cb570 authored by Wolfram Sang's avatar Wolfram Sang Committed by Simon Horman
Browse files

ARM: dts: r8a7790: lager: use demuxer for IIC0/I2C0 



Make it possible to select which I2C IP core you want to run on the
EXIO-A connector. This is the reference how to use this feature. Update
the copyright while we are here.

Signed-off-by: default avatarWolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: default avatarSimon Horman <horms+renesas@verge.net.au>
parent 89aac8af

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

+30 −2
Original line number Diff line number Diff line
@@ -3,6 +3,7 @@ 
 *

 * Copyright (C) 2013-2014 Renesas Solutions Corp.

 * Copyright (C) 2014 Cogent Embedded, Inc.

 * Copyright (C) 2015-2016 Renesas Electronics Corporation

 *

 * This file is licensed under the terms of the GNU General Public License

 * version 2.  This program is licensed "as is" without any warranty of any
@@ -49,6 +50,7 @@ 
	aliases {

		serial0 = &scif0;

		serial1 = &scifa1;

		i2c8 = "i2cexio";

	};



	chosen {
@@ -252,6 +254,23 @@ 
		#clock-cells = <0>;

		clock-frequency = <148500000>;

	};



	/*

	 * 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

	 * depending on the use case (e.g. DMA with IIC0 or slave support with I2C0).

	 * Note: For testing the I2C slave feature, it is convenient to connect this

	 * bus with IIC3 on pins 110 (SCL) + 112 (SDA), select I2C0 at runtime, and

	 * instantiate the slave device at runtime according to the documentation.

	 * You can then communicate with the slave via IIC3.

	 */

	i2cexio: i2c@8 {

		compatible = "i2c-demux-pinctrl";

		i2c-parent = <&iic0>, <&i2c0>;

		i2c-bus-name = "i2c-exio";

		#address-cells = <1>;

		#size-cells = <0>;

	};

};



&du {
@@ -350,6 +369,11 @@ 
		renesas,function = "msiof1";

	};



	i2c0_pins: i2c0 {

		renesas,groups = "i2c0";

		renesas,function = "i2c0";

	};



	iic0_pins: iic0 {

		renesas,groups = "iic0";

		renesas,function = "iic0";
@@ -537,10 +561,14 @@ 
	cpu0-supply = <&vdd_dvfs>;

};



&i2c0	{

	pinctrl-0 = <&i2c0_pins>;

	pinctrl-names = "i2c-exio";

};



&iic0	{

	status = "okay";

	pinctrl-0 = <&iic0_pins>;

	pinctrl-names = "default";

	pinctrl-names = "i2c-exio";

};



&iic1	{

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