From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,T_DKIMWL_WL_HIGH,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A359CC072B1 for ; Thu, 30 May 2019 04:15:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6DBA225215 for ; Thu, 30 May 2019 04:15:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1559189712; bh=jf+s4SK7RpMzJsq9FgaAX31/M1NUE6wB1p0wg35hEgQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=gbpwsV1O7pILZ0Ua92pWtUyX+WkBg2jsiqdHWoQR8J14361xZLxhFIL+/43111oBl KN6wTPdFKZvMse6iX1IdDgPAPod6EyL5O6CcM4ZJrloVVosqFQNMxW+U1t6D7lZxfa Vr9OSr1G8bSajQAgPcU4l6zzkgv0vhHaAfsECut8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731082AbfE3EPL (ORCPT ); Thu, 30 May 2019 00:15:11 -0400 Received: from mail.kernel.org ([198.145.29.99]:40912 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728521AbfE3DQC (ORCPT ); Wed, 29 May 2019 23:16:02 -0400 Received: from localhost (ip67-88-213-2.z213-88-67.customer.algx.net [67.88.213.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1BF612449A; Thu, 30 May 2019 03:16:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1559186162; bh=jf+s4SK7RpMzJsq9FgaAX31/M1NUE6wB1p0wg35hEgQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UKlK3c6Tqq8I7Ft7DCuW9JYFIkUeCcLlwIMeWhTx8EKJWlTg3YjfgmyK9urPx+hPs 6bNf2NwY1yPMn8HLMYs8DF6FvUjGibopV4zCb2jWF4i0MLet7zlMGAoHglTB4o7IJg eBXykRml0/zFu5OY9kUyU6D3Tude4TGv3Xn9K5Q4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Trac Hoang , Scott Branden , Adrian Hunter , Ulf Hansson Subject: [PATCH 4.19 010/276] mmc: sdhci-iproc: cygnus: Set NO_HISPD bit to fix HS50 data hold time problem Date: Wed, 29 May 2019 20:02:48 -0700 Message-Id: <20190530030524.206336704@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190530030523.133519668@linuxfoundation.org> References: <20190530030523.133519668@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Trac Hoang commit b7dfa695afc40d5396ed84b9f25aa3754de23e39 upstream. The iproc host eMMC/SD controller hold time does not meet the specification in the HS50 mode. This problem can be mitigated by disabling the HISPD bit; thus forcing the controller output data to be driven on the falling clock edges rather than the rising clock edges. This change applies only to the Cygnus platform. Stable tag (v4.12+) chosen to assist stable kernel maintainers so that the change does not produce merge conflicts backporting to older kernel versions. In reality, the timing bug existed since the driver was first introduced but there is no need for this driver to be supported in kernel versions that old. Cc: stable@vger.kernel.org # v4.12+ Signed-off-by: Trac Hoang Signed-off-by: Scott Branden Acked-by: Adrian Hunter Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman --- drivers/mmc/host/sdhci-iproc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/mmc/host/sdhci-iproc.c +++ b/drivers/mmc/host/sdhci-iproc.c @@ -185,7 +185,8 @@ static const struct sdhci_ops sdhci_ipro }; static const struct sdhci_pltfm_data sdhci_iproc_cygnus_pltfm_data = { - .quirks = SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK, + .quirks = SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK | + SDHCI_QUIRK_NO_HISPD_BIT, .quirks2 = SDHCI_QUIRK2_ACMD23_BROKEN | SDHCI_QUIRK2_HOST_OFF_CARD_ON, .ops = &sdhci_iproc_32only_ops, };