From mboxrd@z Thu Jan 1 00:00:00 1970 From: Adrian Hunter Subject: Re: [PATCH 2/2] mmc: tegra: implement memcomp pad calibration Date: Fri, 4 Mar 2016 15:02:18 +0200 Message-ID: <56D9875A.4080800@intel.com> References: <1456779385-18996-1-git-send-email-dev@lynxeye.de> <1456779385-18996-2-git-send-email-dev@lynxeye.de> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1456779385-18996-2-git-send-email-dev@lynxeye.de> Sender: linux-mmc-owner@vger.kernel.org To: Lucas Stach , Ulf Hansson Cc: Stephen Warren , Thierry Reding , Alexandre Courbot , Jon Hunter , linux-mmc@vger.kernel.org, linux-tegra@vger.kernel.org List-Id: linux-tegra@vger.kernel.org On 29/02/16 22:56, Lucas Stach wrote: > The Tegra30+ SDMMC module has memcomp pads that are used to > automatically find and set the correct drive strength settings to > the sdmmc pads. The calibration needs to be manually kicked off > when the card signal voltage is changed, after the card clock is > supplied again. > > Signed-off-by: Lucas Stach > --- > This commit allows signal voltage changes on my Tegar30 Beaver to > succeed, making UHS-I modes work. > --- Doesn't apply cleanly, but otherwise looks OK. Acked-by: Adrian Hunter