From patchwork Mon Jan 19 10:48:27 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vincent Yang X-Patchwork-Id: 5657121 Return-Path: X-Original-To: patchwork-linux-mmc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 6F366C058D for ; Mon, 19 Jan 2015 10:49:56 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 9E78920254 for ; Mon, 19 Jan 2015 10:49:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B9C362024F for ; Mon, 19 Jan 2015 10:49:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752000AbbASKtx (ORCPT ); Mon, 19 Jan 2015 05:49:53 -0500 Received: from mail-pa0-f48.google.com ([209.85.220.48]:50694 "EHLO mail-pa0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751029AbbASKtx (ORCPT ); Mon, 19 Jan 2015 05:49:53 -0500 Received: by mail-pa0-f48.google.com with SMTP id rd3so38176816pab.7 for ; Mon, 19 Jan 2015 02:49:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=f8dp/DYE/dA9M+9fGy06RvG+KZXcAuloTZk2F81aoFI=; b=s48p2vsFVbhcBvnNC3pmrB3V+COPrG9PiQdazuDXVkTltZTgS5uCB4M5L7gWJYYkUh 9VuGgHIRqVoJiE0HWRlV46xytMhlPOntDd+yTynPgjCVYAcX7MeRKt4pLuplpdUdEn2B W0i8Kt4BebgkBwSgWiLIJsOU3Ovz1S1bPtPtThFsxsoGW5QbdhXBSZYR1Ppm0nLn3svb fyx74Ii3Yy2gjyDE3cs0OjroBzD31YKRVPWMr5Dhh8fCgo/bIB20THY1+8mH9zqkU9qg b4bphwy4QZJ+BvIPuSdMQti13xddgWZtxW8el4cqWkwr9Lufj2Pa47lJI+M3TlrKsR1v kppQ== X-Received: by 10.66.158.66 with SMTP id ws2mr42897040pab.145.1421664593032; Mon, 19 Jan 2015 02:49:53 -0800 (PST) Received: from localhost.localdomain ([124.219.7.128]) by mx.google.com with ESMTPSA id vl1sm11326436pbc.62.2015.01.19.02.49.49 (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 19 Jan 2015 02:49:52 -0800 (PST) From: Vincent Yang X-Google-Original-From: Vincent Yang To: linux-mmc@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: linux@arm.linux.org.uk, chris@printf.net, ulf.hansson@linaro.org, andy.green@linaro.org, patches@linaro.org, jaswinder.singh@linaro.org, Vincent Yang Subject: [PATCH v4 2/4] mmc: sdhci: add a quirk for tuning work around Date: Mon, 19 Jan 2015 18:48:27 +0800 Message-Id: <1421664509-1807-3-git-send-email-Vincent.Yang@tw.fujitsu.com> X-Mailer: git-send-email 1.9.0 In-Reply-To: <1421664509-1807-1-git-send-email-Vincent.Yang@tw.fujitsu.com> References: <1421664509-1807-1-git-send-email-Vincent.Yang@tw.fujitsu.com> Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Spam-Status: No, score=-6.8 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_HI, T_DKIM_INVALID, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch defines a quirk for tuning work around for some sdhci host controller. It sets both SDHCI_CTRL_EXEC_TUNING and SDHCI_CTRL_TUNED_CLK for tuning. It is a preparation and will be used by Fujitsu SDHCI controller f_sdh30 driver. Signed-off-by: Vincent Yang --- drivers/mmc/host/sdhci.c | 2 ++ include/linux/mmc/sdhci.h | 2 ++ 2 files changed, 4 insertions(+) diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 144b561..ffe6340 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -1964,6 +1964,8 @@ static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode) ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); ctrl |= SDHCI_CTRL_EXEC_TUNING; + if (host->quirks2 & SDHCI_QUIRK2_TUNING_WORK_AROUND) + ctrl |= SDHCI_CTRL_TUNED_CLK; sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); /* diff --git a/include/linux/mmc/sdhci.h b/include/linux/mmc/sdhci.h index f767a0d..bc973f7 100644 --- a/include/linux/mmc/sdhci.h +++ b/include/linux/mmc/sdhci.h @@ -106,6 +106,8 @@ struct sdhci_host { #define SDHCI_QUIRK2_CLEAR_TRANSFERMODE_REG_BEFORE_CMD (1<<10) /* Capability register bit-63 indicates HS400 support */ #define SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400 (1<<11) +/* forced tuned clock */ +#define SDHCI_QUIRK2_TUNING_WORK_AROUND (1<<12) int irq; /* Device IRQ */ void __iomem *ioaddr; /* Mapped address */