From patchwork Tue May 11 21:20:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Packham X-Patchwork-Id: 435933 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 66313C43461 for ; Tue, 11 May 2021 21:21:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 311E96191A for ; Tue, 11 May 2021 21:21:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229996AbhEKVWG (ORCPT ); Tue, 11 May 2021 17:22:06 -0400 Received: from gate2.alliedtelesis.co.nz ([202.36.163.20]:48252 "EHLO gate2.alliedtelesis.co.nz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229920AbhEKVWF (ORCPT ); Tue, 11 May 2021 17:22:05 -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 C4BA7891B0; Wed, 12 May 2021 09:20:55 +1200 (NZST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alliedtelesis.co.nz; s=mail181024; t=1620768055; bh=kJIwm8UvSDRhwl42HtUfLnsYFX5gkJOtab2NNv/0grU=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Ilrfs2fIDEof0cYUZs5FsVaRBplnXwiE9vyFldfT95ZDbs/AqZohXJxy0Men/294S lXdmR2icabZCuwro0f5X6RFLtXHI/2oT5TZT9fmgcW4X9iO+rWTtU84gu7vDzcmqrl Y0Tl9vkDgf3L9aKfPGMFMuxfbvs/GmKyi6wOUtyFC28qmhzMhkC9ZnQznt4mKOUAtz XVRe89hw9W9JCe1sqzcKPoNqBm8G2h6vWAu6BusFbE9LMf9YRWut7TCq1W3N+riyvD Q2RlqQ6OloX5WqR5szZQFue1OzFDaGrEMq0v975zkzCjqUc0C3OrjboWrfscaxI4JS FTtglr9+zokqA== 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 ; Wed, 12 May 2021 09:20:55 +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 A300813ECA6; Wed, 12 May 2021 09:20:55 +1200 (NZST) Received: by chrisp-dl.ws.atlnz.lc (Postfix, from userid 1030) id 9FEBE283A61; Wed, 12 May 2021 09:20:55 +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 v3 3/4] powerpc/fsl: set fsl, i2c-erratum-a004447 flag for P1010 i2c controllers Date: Wed, 12 May 2021 09:20:51 +1200 Message-Id: <20210511212052.27242-4-chris.packham@alliedtelesis.co.nz> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210511212052.27242-1-chris.packham@alliedtelesis.co.nz> References: <20210511212052.27242-1-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=1ZVZaj5zE4ULg8TjvlMA:9 X-SEG-SpamProfiler-Score: 0 Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org The i2c controllers on the P1010 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 P1010 Chip Errata Rev L. Signed-off-by: Chris Packham --- Notes: Changes in v3: - New arch/powerpc/boot/dts/fsl/p1010si-post.dtsi | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/powerpc/boot/dts/fsl/p1010si-post.dtsi b/arch/powerpc/boot/dts/fsl/p1010si-post.dtsi index c2717f31925a..ccda0a91abf0 100644 --- a/arch/powerpc/boot/dts/fsl/p1010si-post.dtsi +++ b/arch/powerpc/boot/dts/fsl/p1010si-post.dtsi @@ -122,7 +122,15 @@ memory-controller@2000 { }; /include/ "pq3-i2c-0.dtsi" + i2c@3000 { + fsl,i2c-erratum-a004447; + }; + /include/ "pq3-i2c-1.dtsi" + i2c@3100 { + fsl,i2c-erratum-a004447; + }; + /include/ "pq3-duart-0.dtsi" /include/ "pq3-espi-0.dtsi" spi0: spi@7000 {