From patchwork Thu Mar 17 19:01:08 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Leo Li X-Patchwork-Id: 12784536 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id EE617C433EF for ; Thu, 17 Mar 2022 19:03:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=wACbTFVoRW0AA/yts9i+4+cGLNgAge6IkBHCxvv1juA=; b=k60MW5xVgcBVml 9LjnH9Pet1q/TfRBiAqtWhp8riMGeH7d6RLlbOPE/cICdns2FkZ0ijdupLrnokJPEvnnd/DjaADp6 UM+l24S7v1DhucKyV2Q3oxQkZCtheb8fWJD0Gr1XmeVXSJTY3ArRBO5myPxN4pYWPVVbmNoL9i5XO B0nqcn0pfYcL8/AxFa+BCIlOP8pX0Qai/pZqrow+mkfPQL1mArkUPFzMgL6NBFBe4UgsHSQeC3up4 SzMJMiQUYrRQQWHop1ErVL82xk8LHYG0aYia+lPSdlddlD6mG5bbcNX6SgFmxOaidOPhnm+TAPDuj EcmZpjCWHj++Vpi6sVSg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nUvO7-00H6C8-Gx; Thu, 17 Mar 2022 19:02:19 +0000 Received: from inva021.nxp.com ([92.121.34.21]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nUvNG-00H5kK-HD for linux-arm-kernel@lists.infradead.org; Thu, 17 Mar 2022 19:01:28 +0000 Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 3CC5C202DA9; Thu, 17 Mar 2022 20:01:25 +0100 (CET) Received: from smtp.na-rdc02.nxp.com (usphx01srsp001v.us-phx01.nxp.com [134.27.49.11]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id F2C18202DB0; Thu, 17 Mar 2022 20:01:24 +0100 (CET) Received: from right.am.freescale.net (right.am.freescale.net [10.81.116.145]) by usphx01srsp001v.us-phx01.nxp.com (Postfix) with ESMTP id 71B3440576; Thu, 17 Mar 2022 12:01:23 -0700 (MST) From: Li Yang To: Shawn Guo , Li Yang , Rob Herring Cc: Biwen Li , linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 5/6] arm64: dts: ls208xa-rdb: fix errata E-00013 Date: Thu, 17 Mar 2022 14:01:08 -0500 Message-Id: <20220317190109.3742-5-leoyang.li@nxp.com> X-Mailer: git-send-email 2.25.1.377.g2d2118b In-Reply-To: <20220317190109.3742-1-leoyang.li@nxp.com> References: <20220317190109.3742-1-leoyang.li@nxp.com> MIME-Version: 1.0 X-Virus-Scanned: ClamAV using ClamSMTP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220317_120126_777652_4C94499A X-CRM114-Status: UNSURE ( 8.91 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Biwen Li 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 Signed-off-by: Li Yang --- arch/arm64/boot/dts/freescale/fsl-ls208xa-rdb.dtsi | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/fsl-ls208xa-rdb.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls208xa-rdb.dtsi index 4b71c4fcb35f..a752f06a2e74 100644 --- a/arch/arm64/boot/dts/freescale/fsl-ls208xa-rdb.dtsi +++ b/arch/arm64/boot/dts/freescale/fsl-ls208xa-rdb.dtsi @@ -49,6 +49,8 @@ pca9547@75 { reg = <0x75>; #address-cells = <1>; #size-cells = <0>; + idle-state = <0>; + i2c@1 { #address-cells = <1>; #size-cells = <0>;