From mboxrd@z Thu Jan 1 00:00:00 1970 From: Zach Brown Subject: [PATCH 0/2] Add device tree property and quirk for supporting sdhci Date: Tue, 18 Oct 2016 10:37:04 -0500 Message-ID: <1476805026-677-1-git-send-email-zach.brown@ni.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: Received: from skprod3.natinst.com ([130.164.80.24]:34802 "EHLO ni.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S936603AbcJRPhV (ORCPT ); Tue, 18 Oct 2016 11:37:21 -0400 Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: ulf.hansson@linaro.org Cc: adrian.hunter@intel.com, robh+dt@kernel.org, mark.rutland@arm.com, linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, zach.brown@ni.com Some board configurations can not support sd highspeed mode due to the distance between the card slot and the controller. The card and controller report that they are capable of highspeed however, so we need a mechanism for specifying that the setup is incapable of supporting highspeed mode. The first patch adds documentation about a new devicetree property broken-highspeed. The second patch keeps the sd controller and card from going into highspeed mode when the property is set. Zach Brown (2): sdhci: Add device tree property broken-highspeed sdhci: Prevent SD from doing high-speed timing when broken-highspeed property is set Documentation/devicetree/bindings/mmc/mmc.txt | 2 ++ drivers/mmc/host/sdhci.c | 4 +++- 2 files changed, 5 insertions(+), 1 deletion(-) -- 2.7.4