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: 10588263 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 CDD42112B for ; Wed, 5 Sep 2018 05:25:35 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B0CCF295E2 for ; Wed, 5 Sep 2018 05:25:35 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A429229662; Wed, 5 Sep 2018 05:25:35 +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=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 4EF74295E2 for ; Wed, 5 Sep 2018 05:25:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=v/lOMw2iNG7SKhu3JLTluxT2MgNzJ7ErdW6ig04PFnE=; b=eS7a5xKeGaIulKeGaU1Jfr6uWR bOXXHkPEVq37Y6rdtOCOtFEZFCMUbMRgADVE/xUIdvjPAZVXm+FhIrEv3uA/HhGnqjSjnNCvc3SZm 2uTET+vFLnySVwFxc2pKRrI1XIdLTsYfZSv3k4iwvtfkeQr5GBz7NUV/UZeWep3oixyF84PVROmNK ZsfBu1BBfZvS4g+gKXQJIYqsvylubwW12GsxgXEepmzIDl8hTRgEOXkyJzDGkjCgOWcw3oxiHKcnD NyB0O3PA1rjA6I+XAE3rO8lw2huCYUaDBhoYHp1IYdXwr4Y/lrilnMwYkqhYpQXWxf7ipaWwqmFTE 79xujeTg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fxQJf-0007gL-27; Wed, 05 Sep 2018 05:25:23 +0000 Received: from mail.kmu-office.ch ([2a02:418:6a02::a2]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1fxQGa-0004j2-2h for linux-arm-kernel@lists.infradead.org; Wed, 05 Sep 2018 05:22:13 +0000 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) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=agner.ch; s=dkim; t=1536124920; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=xcBGiVYeRuO8SpRzPH8PsD3Jx7Ax0kkYjdX+hS/T348=; b=arjLOgHwunL8acjfC6Hgxjl0UEepOUQBEr4zwQhye4ChcAzhNhv2pgwVVgA3+BAtwM+3/x HRYnQcU4RRt1fdbL3l626DsWFAxTLwT474TDMrx64Mfen6LVbCFo6kquylyJiPe8IwGUaL Den8PhpwFePWYLenNawLOf7R/j4JR0I= 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-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180904_222212_354790_BA755F95 X-CRM114-Status: GOOD ( 14.02 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, architt@codeaurora.org, max.krummenacher@toradex.com, marcel.ziswiler@toradex.com, gustavo@padovan.org, maarten.lankhorst@linux.intel.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, a.hajda@samsung.com, linux-imx@nxp.com, kernel@pengutronix.de, fabio.estevam@nxp.com, sean@poorly.run, Stefan Agner , linux-arm-kernel@lists.infradead.org, Laurent.pinchart@ideasonboard.com MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org 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