From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg0-f68.google.com ([74.125.83.68]:33607 "EHLO mail-pg0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755382AbdDRKXr (ORCPT ); Tue, 18 Apr 2017 06:23:47 -0400 Date: Tue, 18 Apr 2017 18:23:40 +0800 From: Dong Aisheng To: Haibo Chen Cc: adrian.hunter@intel.com, ulf.hansson@linaro.org, aisheng.dong@nxp.com, tharvey@gateworks.com, stable@vger.kernel.org, linux-mmc@vger.kernel.org Subject: Re: [PATCH] mmc: sdhci-esdhc-imx: increase the pad I/O drive strength for DDR50 card Message-ID: <20170418102340.GB19365@b29396-OptiPlex-7040> References: <1492427402-5506-1-git-send-email-haibo.chen@nxp.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1492427402-5506-1-git-send-email-haibo.chen@nxp.com> Sender: stable-owner@vger.kernel.org List-ID: On Mon, Apr 17, 2017 at 07:10:02PM +0800, Haibo Chen wrote: > Currently for DDR50 card, it need tuning in default. We meet tuning fail > issue for DDR50 card and some data CRC error when DDR50 sd card works. > > This is because the default pad I/O drive strength can't make sure DDR50 > card work stable. So increase the pad I/O drive strength for DDR50 card, > and use pins_100mhz. > > Tested-and-reported-by: Tim Harvey > Signed-off-by: Haibo Chen > Cc: stable@vger.kernel.org # v4.4+ Acked-by: Dong Aisheng Regards Dong Aisheng