From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756746AbcH2XVd (ORCPT ); Mon, 29 Aug 2016 19:21:33 -0400 Received: from skprod3.natinst.com ([130.164.80.24]:40253 "EHLO ni.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1756331AbcH2XVa (ORCPT ); Mon, 29 Aug 2016 19:21:30 -0400 From: Zach Brown To: adrian.hunter@intel.com Cc: robh+dt@kernel.org, ulf.hansson@linaro.org, mark.rutland@arm.com, linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, michal.simek@xilinx.com, soren.brinkmann@xilinx.com, linux-arm-kernel@lists.infradead.org, zach.brown@ni.com Subject: [PATCH 1/2] sdhci-of-arasan: Add device tree parameter fails-without-test-cd bit Date: Mon, 29 Aug 2016 18:20:56 -0500 Message-Id: <1472512857-13063-1-git-send-email-zach.brown@ni.com> X-Mailer: git-send-email 2.7.4 X-MIMETrack: Itemize by SMTP Server on US-AUS-MGWOut1/AUS/H/NIC(Release 8.5.3FP6 HF1218|December 12, 2014) at 08/29/2016 06:20:57 PM, Serialize by Router on US-AUS-MGWOut1/AUS/H/NIC(Release 8.5.3FP6 HF1218|December 12, 2014) at 08/29/2016 06:20:57 PM, Serialize complete at 08/29/2016 06:20:57 PM X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2016-08-29_10:,, signatures=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The sdhci controller on xilinx zynq devices will not function unless the CD bit is provided. http://www.xilinx.com/support/answers/61064.html In cases where it is impossible to provide the CD bit in hardware, setting the controller to test mode and then setting inserted to true will get the controller to function without the CD bit. The device property "fails-without-test-cd" will let the arasan driver know the controller does not have the CD line wired and that the controller does not function without it. Signed-off-by: Zach Brown --- v2: * improved commit messages * removed fake-cd device property * removed fake-cd quirk * use broken-cd device property * documented new usage of broken-cd v3: * removed new usage of broken-cd * created fails-without-test-cd device property * created arasan controller specific quirk Documentation/devicetree/bindings/mmc/arasan,sdhci.txt | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt b/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt index 3404afa..ec0dc82 100644 --- a/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt +++ b/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt @@ -21,6 +21,10 @@ Required Properties: - interrupts: Interrupt specifier - interrupt-parent: Phandle for the interrupt controller that services interrupts for this device. +Optional Properties: +- fails-without-test-cd: when present, the controller doesn't work when the CD + line is not connected properly, and the line is not connected properly. Test + mode can be used to force the controller to function. Required Properties for "arasan,sdhci-5.1": - phys: From PHY bindings: Phandle for the Generic PHY for arasan. -- 2.7.4