From patchwork Tue May 11 21:20:50 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Packham X-Patchwork-Id: 435932 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=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 964B4C43462 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 606436191C for ; Tue, 11 May 2021 21:21:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230009AbhEKVWH (ORCPT ); Tue, 11 May 2021 17:22:07 -0400 Received: from gate2.alliedtelesis.co.nz ([202.36.163.20]:48243 "EHLO gate2.alliedtelesis.co.nz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229925AbhEKVWF (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 A15F4891AD; 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=NuxtmiB9vBtPJ7+lr2Jkbk+llLCBqpimoEWh66Aw+ZA=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=fTiG4o8jYm31vmd7bCG8oEeTmrJtwWArdupFwEcUK21zMu/yU/AUT4WYTNaYHUesz WadDVszJW83O1laIrGmQqbwxw/QNHgRPLH7wMK9V1JFh6Q6+EWjAOkU9CO8WAaRaEn LRqfsksu5c8mVcMAVE9h6o2bwqF2XzLkpVVdCHlciS25SlBDBP3VfQOZt6xSP6QbT1 g8lqwBj3xvpcPejoB9RVIqzjATUuy3m+UMf0n4Bag1/tSBZigA3U922X5QufnCPAv/ LUhAzt3Ke+iJt1HBeLagEKnAhu8uk+oZ4dXnxK8ARZ0VFt8ZivdOh5iDSVFRCzIHbb fP0+1Q8mOmt6A== 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 8079013ECA6; Wed, 12 May 2021 09:20:55 +1200 (NZST) Received: by chrisp-dl.ws.atlnz.lc (Postfix, from userid 1030) id 7D10D283A61; 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 2/4] powerpc/fsl: set fsl, i2c-erratum-a004447 flag for P2041 i2c controllers Date: Wed, 12 May 2021 09:20:50 +1200 Message-Id: <20210511212052.27242-3-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=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 Acked-by: Michael Ellerman --- 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"