From patchwork Fri May 7 00:40:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Packham X-Patchwork-Id: 1475275 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-i2c-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=alliedtelesis.co.nz header.i=@alliedtelesis.co.nz header.a=rsa-sha256 header.s=mail181024 header.b=NY2CeVW8; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4Fbs7X2YG7z9sWY for ; Fri, 7 May 2021 10:40:56 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233780AbhEGAlu (ORCPT ); Thu, 6 May 2021 20:41:50 -0400 Received: from gate2.alliedtelesis.co.nz ([202.36.163.20]:41790 "EHLO gate2.alliedtelesis.co.nz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233785AbhEGAlu (ORCPT ); Thu, 6 May 2021 20:41:50 -0400 Received: from svr-chch-seg1.atlnz.lc (mmarshal3.atlnz.lc [10.32.18.43]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by gate2.alliedtelesis.co.nz (Postfix) with ESMTPS id 471C4891AE; Fri, 7 May 2021 12:40:49 +1200 (NZST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alliedtelesis.co.nz; s=mail181024; t=1620348049; bh=NuxtmiB9vBtPJ7+lr2Jkbk+llLCBqpimoEWh66Aw+ZA=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=NY2CeVW8/i4AWgoqrYTb/aLTYK6fBzhApPrZQJXRNlk64piJBsheGKIcTlr901tzO kUKK5NlLs4yQFOBGDl3Uk8rSHLlLNm6dHm+dgbZlETiYOPwFNRTVSpr+93BAfLg216 /C6YWuUA/juwWWaBYsism5PZsLwhX5awd/MEAhz6nTHYLtrxxE+NyD9DaD873yb9KZ Lh3gmgpdBY/sBF75EfdyETkGn8xqs+fSB/Dqdmfva3uk6DOXRRnHYjZbVBpr/ZYcJt Xe4VICRvJ9SMmN+uG/PEHrld+kHtcg+q6uzJOyOYFEwQ8Qsgi9eVawG0pFwuf2b/Uy u+v+NRp1Pi0nw== Received: from pat.atlnz.lc (Not Verified[10.32.16.33]) by svr-chch-seg1.atlnz.lc with Trustwave SEG (v8,2,6,11305) id ; Fri, 07 May 2021 12:40:48 +1200 Received: from chrisp-dl.ws.atlnz.lc (chrisp-dl.ws.atlnz.lc [10.33.22.20]) by pat.atlnz.lc (Postfix) with ESMTP id DED6813ECA5; Fri, 7 May 2021 12:40:48 +1200 (NZST) Received: by chrisp-dl.ws.atlnz.lc (Postfix, from userid 1030) id DA0A2283A61; Fri, 7 May 2021 12:40:48 +1200 (NZST) From: Chris Packham To: wsa@kernel.org, andriy.shevchenko@linux.intel.com, andy.shevchenko@gmail.com, robh+dt@kernel.org, mpe@ellerman.id.au Cc: linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, Chris Packham , Benjamin Herrenschmidt , Paul Mackerras Subject: [PATCH v2 2/3] powerpc/fsl: set fsl,i2c-erratum-a004447 flag for P2041 i2c controllers Date: Fri, 7 May 2021 12:40:46 +1200 Message-Id: <20210507004047.4454-3-chris.packham@alliedtelesis.co.nz> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210507004047.4454-1-chris.packham@alliedtelesis.co.nz> References: <20210507004047.4454-1-chris.packham@alliedtelesis.co.nz> MIME-Version: 1.0 X-SEG-SpamProfiler-Analysis: v=2.3 cv=K6Jc4BeI c=1 sm=1 tr=0 a=KLBiSEs5mFS1a/PbTCJxuA==:117 a=5FLXtPjwQuUA:10 a=CCyhWkR5sz16QRgSDIcA:9 X-SEG-SpamProfiler-Score: 0 Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org The i2c controllers on the P2040/P2041 have an erratum where the documented scheme for i2c bus recovery will not work (A-004447). A different mechanism is needed which is documented in the P2040 Chip Errata Rev Q (latest available at the time of writing). Signed-off-by: Chris Packham --- arch/powerpc/boot/dts/fsl/p2041si-post.dtsi | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/arch/powerpc/boot/dts/fsl/p2041si-post.dtsi b/arch/powerpc/boot/dts/fsl/p2041si-post.dtsi index 872e4485dc3f..ddc018d42252 100644 --- a/arch/powerpc/boot/dts/fsl/p2041si-post.dtsi +++ b/arch/powerpc/boot/dts/fsl/p2041si-post.dtsi @@ -371,7 +371,23 @@ sdhc@114000 { }; /include/ "qoriq-i2c-0.dtsi" + i2c@118000 { + fsl,i2c-erratum-a004447; + }; + + i2c@118100 { + fsl,i2c-erratum-a004447; + }; + /include/ "qoriq-i2c-1.dtsi" + i2c@119000 { + fsl,i2c-erratum-a004447; + }; + + i2c@119100 { + fsl,i2c-erratum-a004447; + }; + /include/ "qoriq-duart-0.dtsi" /include/ "qoriq-duart-1.dtsi" /include/ "qoriq-gpio-0.dtsi"