From patchwork Mon Jan 25 18:47:28 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lucas Stach X-Patchwork-Id: 12043981 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 84F66C433E9 for ; Mon, 25 Jan 2021 18:49:33 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 4CF98224D1 for ; Mon, 25 Jan 2021 18:49:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4CF98224D1 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version: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=Cmwesa+TFJQ7qO1Fn7rnqG67IT6EBL0LBU/VJymkv/Q=; b=xd1dDf0BYs52InFs5VaxxPGxX dxycNeaDvKot1NCpj1jzRv4lpBjDglom/2uerjKpgPdzEWfKKSb2hu2eA6d/LvyesKVn21t47UeoB wHFFgtQ+tYu5mnDx7oyJeEWDpWBEBznl6GN2vvs+8poj6k00Tcg1LRF8F/ksl1XL5oeDclhgMwMAQ 1uUMvBTR+NWmLIhBX8WmyUoPzZ/XzJqeR9Iyl8LeJCT9OXQg7MA7Bm5eQItwBtj0SnAvMsdEBCiV+ IrhcFlC2rpHvRVQoyQYJVTDUDD6PNlGhCjI3xiDc6VgzLSJ8dxE3jqzg4TiRUFlN9BcHo/jPGUeT/ TBkJV+2HQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l46uK-0001uM-Vd; Mon, 25 Jan 2021 18:48:13 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1l46tp-0001io-3V for linux-arm-kernel@lists.infradead.org; Mon, 25 Jan 2021 18:47:45 +0000 Received: from [2a0a:edc0:0:1101:1d::39] (helo=dude03.red.stw.pengutronix.de) by metis.ext.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1l46tl-0007Cg-GU; Mon, 25 Jan 2021 19:47:37 +0100 From: Lucas Stach To: Shawn Guo Subject: [PATCH 02/10] ARM: dts: imx6: RDU2: reduce i2c drive-strength Date: Mon, 25 Jan 2021 19:47:28 +0100 Message-Id: <20210125184736.1226435-2-l.stach@pengutronix.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210125184736.1226435-1-l.stach@pengutronix.de> References: <20210125184736.1226435-1-l.stach@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:1101:1d::39 X-SA-Exim-Mail-From: l.stach@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-arm-kernel@lists.infradead.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210125_134741_260701_0AB4DBFC X-CRM114-Status: GOOD ( 10.94 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Fabio Estevam , kernel@pengutronix.de, linux-arm-kernel@lists.infradead.org, patchwork-lst@pengutronix.de Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The current 25 Ohm drive-strength is much too strong, resulting in significant overshoot of the signal. Reduce the drive-strength to 75 Ohm to get rid of those issues. Signed-off-by: Lucas Stach --- arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi b/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi index 04a66339ceb3..56323890430e 100644 --- a/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi +++ b/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi @@ -984,22 +984,22 @@ pinctrl_i2c1: i2c1grp { fsl,pins = < - MX6QDL_PAD_CSI0_DAT8__I2C1_SDA 0x4001b8b1 - MX6QDL_PAD_CSI0_DAT9__I2C1_SCL 0x4001b8b1 + MX6QDL_PAD_CSI0_DAT8__I2C1_SDA 0x4001b811 + MX6QDL_PAD_CSI0_DAT9__I2C1_SCL 0x4001b811 >; }; pinctrl_i2c2: i2c2grp { fsl,pins = < - MX6QDL_PAD_KEY_COL3__I2C2_SCL 0x4001b8b1 - MX6QDL_PAD_KEY_ROW3__I2C2_SDA 0x4001b8b1 + MX6QDL_PAD_KEY_COL3__I2C2_SCL 0x4001b811 + MX6QDL_PAD_KEY_ROW3__I2C2_SDA 0x4001b811 >; }; pinctrl_i2c3: i2c3grp { fsl,pins = < - MX6QDL_PAD_GPIO_3__I2C3_SCL 0x4001b8b1 - MX6QDL_PAD_GPIO_6__I2C3_SDA 0x4001b8b1 + MX6QDL_PAD_GPIO_3__I2C3_SCL 0x4001b811 + MX6QDL_PAD_GPIO_6__I2C3_SDA 0x4001b811 >; };