From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, 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 1A61DC2D0DC for ; Wed, 25 Dec 2019 10:37:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F02422072A for ; Wed, 25 Dec 2019 10:37:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726516AbfLYKhj (ORCPT ); Wed, 25 Dec 2019 05:37:39 -0500 Received: from inva021.nxp.com ([92.121.34.21]:42330 "EHLO inva021.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726025AbfLYKhi (ORCPT ); Wed, 25 Dec 2019 05:37:38 -0500 Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 7667620084C; Wed, 25 Dec 2019 11:37:36 +0100 (CET) Received: from invc005.ap-rdc01.nxp.com (invc005.ap-rdc01.nxp.com [165.114.16.14]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 6741F2007D4; Wed, 25 Dec 2019 11:37:32 +0100 (CET) Received: from localhost.localdomain (mega.ap.freescale.net [10.192.208.232]) by invc005.ap-rdc01.nxp.com (Postfix) with ESMTP id 17BCB402B3; Wed, 25 Dec 2019 18:37:27 +0800 (SGT) From: Biwen Li To: peda@axentia.se, leoyang.li@nxp.com, robh+dt@kernel.org, mark.rutland@arm.com Cc: linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Biwen Li Subject: [RESEND v6,3/3] arm64: dts: fsl-ls208xa-rdb: fix an errata E-00013 Date: Wed, 25 Dec 2019 18:36:24 +0800 Message-Id: <20191225103624.48342-3-biwen.li@nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191225103624.48342-1-biwen.li@nxp.com> References: <20191225103624.48342-1-biwen.li@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Specify a channel zero in idle state to avoid enterring tri-stated state for PCA9547. About E-00013: - Description: I2C1 and I2C3 buses are missing pull-up. - Impact: When the PCA954x device is tri-stated, the I2C bus will float. This makes the I2C bus and its associated downstream devices inaccessible. - Hardware fix: Populate resistors R189 and R190 for I2C1 and resistors R228 and R229 for I2C3. - Software fix: Remove the tri-state option from the PCA954x driver(PCA954x always on enable status, specify a channel zero in dts to fix the errata E-00013). Signed-off-by: Biwen Li --- Change in v6: - none Change in v5: - specify a channel zero when pca9547 in idle state. arch/arm64/boot/dts/freescale/fsl-ls208xa-rdb.dtsi | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/boot/dts/freescale/fsl-ls208xa-rdb.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls208xa-rdb.dtsi index 6fd7f63085c9..412f1bc0db5f 100644 --- a/arch/arm64/boot/dts/freescale/fsl-ls208xa-rdb.dtsi +++ b/arch/arm64/boot/dts/freescale/fsl-ls208xa-rdb.dtsi @@ -49,6 +49,7 @@ reg = <0x75>; #address-cells = <1>; #size-cells = <0>; + idle-state = <0>; i2c@1 { #address-cells = <1>; #size-cells = <0>; -- 2.17.1