From patchwork Wed Sep 5 05:21:13 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Agner X-Patchwork-Id: 10588253 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5675C112B for ; Wed, 5 Sep 2018 05:22:04 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3C4F02871F for ; Wed, 5 Sep 2018 05:22:04 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2EF6A29545; Wed, 5 Sep 2018 05:22:04 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 115452871F for ; Wed, 5 Sep 2018 05:22:03 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 28BF96E33B; Wed, 5 Sep 2018 05:22:02 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail.kmu-office.ch (mail.kmu-office.ch [IPv6:2a02:418:6a02::a2]) by gabe.freedesktop.org (Postfix) with ESMTPS id 99D6B6E33B for ; Wed, 5 Sep 2018 05:22:01 +0000 (UTC) Received: from trochilidae.hsd1.wa.comcast.net (unknown [IPv6:2601:602:8700:fb00:81ae:bc59:4e6c:42ca]) by mail.kmu-office.ch (Postfix) with ESMTPSA id AB6215C0929; Wed, 5 Sep 2018 07:21:54 +0200 (CEST) From: Stefan Agner To: linus.walleij@linaro.org, airlied@linux.ie, robh+dt@kernel.org, mark.rutland@arm.com, shawnguo@kernel.org, s.hauer@pengutronix.de, p.zabel@pengutronix.de Subject: [PATCH 6/6] ARM: dts: imx6qdl-apalis: add GPIO I2C node for DDC Date: Tue, 4 Sep 2018 22:21:13 -0700 Message-Id: <20180905052113.21262-6-stefan@agner.ch> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20180905052113.21262-1-stefan@agner.ch> References: <20180905052113.21262-1-stefan@agner.ch> X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, max.krummenacher@toradex.com, marcel.ziswiler@toradex.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-imx@nxp.com, kernel@pengutronix.de, fabio.estevam@nxp.com, sean@poorly.run, linux-arm-kernel@lists.infradead.org, Laurent.pinchart@ideasonboard.com MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP Currently, the DDC signals are controlled by the DWC HDMI I2C master to be used for HDMI (DVI on the Apalis Evaluation Board). However, the Apalis Evaluation board also allows to route the Apalis DDC I2C to the LVDS or the VGA connector. By default, the signal is routed to DVI (HDMI), and therefor the current default settings are sensible. To ease customization and to prepare for carrier boards with other needs, add a GPIO I2C DDC node. E.g. to reroute the Apalis DDC to the VGA connector on the Apalis Evaluation Board, the following changes can be used: vga { ... ddc-i2c-bus = <&i2cddc>; }; &hdmi { /delete-property/ pinctrl-0; }; &i2cddc { status = "okay"; }; Signed-off-by: Stefan Agner --- arch/arm/boot/dts/imx6qdl-apalis.dtsi | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/arch/arm/boot/dts/imx6qdl-apalis.dtsi b/arch/arm/boot/dts/imx6qdl-apalis.dtsi index e8d0407e3e18..8340391796df 100644 --- a/arch/arm/boot/dts/imx6qdl-apalis.dtsi +++ b/arch/arm/boot/dts/imx6qdl-apalis.dtsi @@ -61,6 +61,18 @@ status = "disabled"; }; + /* DDC_I2C: I2C2_SDA/SCL on MXM3 205/207 */ + i2cddc: i2c@0 { + compatible = "i2c-gpio"; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_i2c_ddc>; + gpios = <&gpio3 16 GPIO_ACTIVE_HIGH /* sda */ + &gpio2 30 GPIO_ACTIVE_HIGH /* scl */ + >; + i2c-gpio,delay-us = <2>; /* ~100 kHz */ + status = "disabled"; + }; + reg_module_3v3: regulator-module-3v3 { compatible = "regulator-fixed"; regulator-name = "+V3.3"; @@ -688,6 +700,14 @@ >; }; + pinctrl_i2c_ddc: gpioi2cddcgrp { + fsl,pins = < + /* DDC bitbang */ + MX6QDL_PAD_EIM_EB2__GPIO2_IO30 0x1b0b0 + MX6QDL_PAD_EIM_D16__GPIO3_IO16 0x1b0b0 + >; + }; + pinctrl_i2c1: i2c1grp { fsl,pins = < MX6QDL_PAD_CSI0_DAT8__I2C1_SDA 0x4001b8b1