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=-5.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 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 CEF29C3A59D for ; Mon, 19 Aug 2019 11:07:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 986042085A for ; Mon, 19 Aug 2019 11:07:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1566212820; bh=FTtPghP4JhraCtk0Ky8Cw09VOBcrHb9sW6Gmu2Y9IbA=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=kc7jjyYmtKuvV7gDAL49rCEFwH/bWsddRCcNHkzgUCK3bMe6RPHhRq4n/kqucOpqj KjqHkz2Q2xVRaWUSpG+QSCgmhMoYv/Buwg7lTLtwZMgHNHL4dBM/zbPISODOO6ia2X nSSpHxURq4I9QC6cwbtBq+AOmGFIy+4HYIxiwdNM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727201AbfHSLHA (ORCPT ); Mon, 19 Aug 2019 07:07:00 -0400 Received: from mail.kernel.org ([198.145.29.99]:52784 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726477AbfHSLG7 (ORCPT ); Mon, 19 Aug 2019 07:06:59 -0400 Received: from X250 (37.80-203-192.nextgentel.com [80.203.192.37]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 449C720844; Mon, 19 Aug 2019 11:06:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1566212818; bh=FTtPghP4JhraCtk0Ky8Cw09VOBcrHb9sW6Gmu2Y9IbA=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=kcw+WeObE43jKg5SXlqiybEn0zF6OT4mLmNoQJl6smmrg721oVFWfcWYAMMlKDUui H6tKRaaWRYSmIOxjPPTS5kQE0XJgqpr/iRMi7efCwK5TDqdy+ecK7/3qJA5U+t5nsq 5avA7J9KEAcbb9vOoOeHuh85ZbfxvAuOv8pyL9fo= Date: Mon, 19 Aug 2019 13:06:46 +0200 From: Shawn Guo To: Philippe Schenker Cc: Marcel Ziswiler , Max Krummenacher , "stefan@agner.ch" , "devicetree@vger.kernel.org" , Rob Herring , Mark Rutland , Michal =?utf-8?B?Vm9rw6HEjQ==?= , Fabio Estevam , Stefan Agner , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , Pengutronix Kernel Team , NXP Linux Team , Sascha Hauer Subject: Re: [PATCH v4 02/21] ARM: dts: imx7-colibri: disable HS400 Message-ID: <20190819110645.GL5999@X250> References: <20190812142105.1995-1-philippe.schenker@toradex.com> <20190812142105.1995-3-philippe.schenker@toradex.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190812142105.1995-3-philippe.schenker@toradex.com> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Aug 12, 2019 at 02:21:17PM +0000, Philippe Schenker wrote: > From: Stefan Agner > > Force HS200 by masking bit 63 of the SDHCI capability register. > The i.MX ESDHC driver uses SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400. With > that the stack checks bit 63 to descide whether HS400 is available. > Using sdhci-caps-mask allows to mask bit 63. The stack then selects > HS200 as operating mode. > > This prevents rare communication errors with minimal effect on > performance: > sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL > status REF not lock! > > Signed-off-by: Stefan Agner > Signed-off-by: Philippe Schenker Applied, thanks.