From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wolfram Sang Subject: [PATCH v4 02/14] ARM: dts: lager: use demuxer for IIC1/I2C1 Date: Sun, 6 Nov 2016 21:20:20 +0100 Message-ID: <20161106202032.5227-3-wsa+renesas@sang-engineering.com> References: <20161106202032.5227-1-wsa+renesas@sang-engineering.com> Return-path: Received: from sauhun.de ([89.238.76.85]:46878 "EHLO pokefinder.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751829AbcKFUUy (ORCPT ); Sun, 6 Nov 2016 15:20:54 -0500 In-Reply-To: <20161106202032.5227-1-wsa+renesas@sang-engineering.com> Sender: linux-i2c-owner@vger.kernel.org List-Id: linux-i2c@vger.kernel.org To: linux-renesas-soc@vger.kernel.org, Simon Horman Cc: linux-i2c@vger.kernel.org, Simon Horman , Wolfram Sang From: Simon Horman 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: Simon Horman [wsa: rebased and fixed aliases] Signed-off-by: Wolfram Sang --- arch/arm/boot/dts/r8a7790-lager.dts | 39 +++++++++++++++++++++++++++++++++++-- 1 file changed, 37 insertions(+), 2 deletions(-) diff --git a/arch/arm/boot/dts/r8a7790-lager.dts b/arch/arm/boot/dts/r8a7790-lager.dts index dafa49f837118e..bd512c86e85222 100644 --- a/arch/arm/boot/dts/r8a7790-lager.dts +++ b/arch/arm/boot/dts/r8a7790-lager.dts @@ -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"; @@ -607,10 +638,14 @@ 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 { -- 2.9.3