From patchwork Wed Aug 24 23:23:03 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zach Brown X-Patchwork-Id: 9298461 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id A2CDF60757 for ; Wed, 24 Aug 2016 23:24:12 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 88D3629131 for ; Wed, 24 Aug 2016 23:24:12 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7B23C2913C; Wed, 24 Aug 2016 23:24:12 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 01FCC29135 for ; Wed, 24 Aug 2016 23:24:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754278AbcHXXXr (ORCPT ); Wed, 24 Aug 2016 19:23:47 -0400 Received: from skprod3.natinst.com ([130.164.80.24]:33305 "EHLO ni.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752725AbcHXXXi (ORCPT ); Wed, 24 Aug 2016 19:23:38 -0400 Received: from us-aus-mgwout2.amer.corp.natinst.com (nb-snip2-1338.natinst.com [130.164.19.135]) by us-aus-skprod3.natinst.com (8.15.0.59/8.15.0.59) with ESMTP id u7ONN5lO007467; Wed, 24 Aug 2016 18:23:05 -0500 Received: from zach-desktop.amer.corp.natinst.com ([130.164.14.198]) by us-aus-mgwout2.amer.corp.natinst.com (Lotus Domino Release 8.5.3FP6 HF1218) with ESMTP id 2016082418230486-138446 ; Wed, 24 Aug 2016 18:23:04 -0500 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 Subject: [PATCH 1/2] sdhci-of-arasan: Add quirk and device tree parameter to fake CD bit Date: Wed, 24 Aug 2016 18:23:03 -0500 Message-Id: <1472080984-17373-1-git-send-email-zach.brown@ni.com> X-Mailer: git-send-email 2.7.4 X-MIMETrack: Itemize by SMTP Server on US-AUS-MGWOut2/AUS/H/NIC(Release 8.5.3FP6 HF1218|December 12, 2014) at 08/24/2016 06:23:04 PM, Serialize by Router on US-AUS-MGWOut2/AUS/H/NIC(Release 8.5.3FP6 HF1218|December 12, 2014) at 08/24/2016 06:23:05 PM, Serialize complete at 08/24/2016 06:23:05 PM X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2016-08-24_13:, , signatures=0 Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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 with out the cd bit. The device property "fake-cd" will let the arasan driver know it needs to fake the cd bit for the controller inorder for the controller to function with a SD card that does not provide the CD bit. Signed-off-by: Zach Brown --- 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..3b9f406 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: +- fake-cd: On Zynq Devices the SDHCI Controller will not work without the cd + bit. When this option is set the driver will put the controller in test mode + and fake the cd bit so it will function. Required Properties for "arasan,sdhci-5.1": - phys: From PHY bindings: Phandle for the Generic PHY for arasan.