From patchwork Wed Dec 28 11:06:26 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ritesh Harjani X-Patchwork-Id: 9490211 X-Patchwork-Delegate: agross@codeaurora.org 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 95D0B62AB0 for ; Wed, 28 Dec 2016 11:08:52 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8175A1FE6A for ; Wed, 28 Dec 2016 11:08:52 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7611B2623D; Wed, 28 Dec 2016 11:08:52 +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=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=unavailable 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 2E9391FE6A for ; Wed, 28 Dec 2016 11:08:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751424AbcL1LHX (ORCPT ); Wed, 28 Dec 2016 06:07:23 -0500 Received: from smtp.codeaurora.org ([198.145.29.96]:38334 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751285AbcL1LHV (ORCPT ); Wed, 28 Dec 2016 06:07:21 -0500 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id AECA6612D0; Wed, 28 Dec 2016 11:07:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1482923240; bh=ul97hyxLz0SZhhdfWUgX8bItIrbVv28sgIrbJU32YHU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SLVwZGholC0QKIYWVubMF7rbryzhzJKC6fWgo57Vzq7AuEmDUTnqNBMDnlg2C5D7W FYRKJPMzuCFJKUzvcIk9/QDLWTc8ZQr+7wORA6e+tzSIxjA8Qt+pOIwlI0sTpAh0CY xtGyke/HmtgoF0rUC+uewyspztLYlr/7I4ZTb+u4= Received: from rharjani-linux.qualcomm.com (unknown [202.46.23.54]) (using TLSv1.1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: riteshh@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 92ED8613A6; Wed, 28 Dec 2016 11:07:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1482923240; bh=ul97hyxLz0SZhhdfWUgX8bItIrbVv28sgIrbJU32YHU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SLVwZGholC0QKIYWVubMF7rbryzhzJKC6fWgo57Vzq7AuEmDUTnqNBMDnlg2C5D7W FYRKJPMzuCFJKUzvcIk9/QDLWTc8ZQr+7wORA6e+tzSIxjA8Qt+pOIwlI0sTpAh0CY xtGyke/HmtgoF0rUC+uewyspztLYlr/7I4ZTb+u4= DMARC-Filter: OpenDMARC Filter v1.3.1 smtp.codeaurora.org 92ED8613A6 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=pass smtp.mailfrom=riteshh@codeaurora.org From: Ritesh Harjani To: ulf.hansson@linaro.org, adrian.hunter@intel.com Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, shawn.lin@rock-chips.com, stummala@codeaurora.org, georgi.djakov@linaro.org, linux-arm-msm@vger.kernel.org, pramod.gurav@linaro.org, jeremymc@redhat.com, venkatg@codeaurora.org, asutoshd@codeaurora.org, subhashj@codeaurora.org, Ritesh Harjani Subject: [PATCH 3/8] mmc: sdhci-msm: Factor out sdhci_msm_hs400 Date: Wed, 28 Dec 2016 16:36:26 +0530 Message-Id: <1482923191-17362-4-git-send-email-riteshh@codeaurora.org> X-Mailer: git-send-email 1.8.2.1 In-Reply-To: <1482923191-17362-1-git-send-email-riteshh@codeaurora.org> References: <1482923191-17362-1-git-send-email-riteshh@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Factor out sdhci_msm_hs400 used for DLL calibration in HS400 modes. This function will be needed for enhanced_strobe as well. Signed-off-by: Ritesh Harjani --- drivers/mmc/host/sdhci-msm.c | 32 ++++++++++++++++++++++++++------ 1 file changed, 26 insertions(+), 6 deletions(-) diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c index 3fc496e..5a37c29 100644 --- a/drivers/mmc/host/sdhci-msm.c +++ b/drivers/mmc/host/sdhci-msm.c @@ -884,6 +884,28 @@ static int sdhci_msm_execute_tuning(struct sdhci_host *host, u32 opcode) return rc; } +/* + * sdhci_msm_hs400 - Calibrate the DLL for HS400 bus speed mode operation. + * DLL operation is only needed for clock > 100MHz. For clock <= 100MHz + * fixed feedback clock is used. + */ +static void sdhci_msm_hs400(struct sdhci_host *host, struct mmc_ios *ios) +{ + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + int ret; + + if (host->clock > CORE_FREQ_100MHZ && + msm_host->tuning_done && !msm_host->calibration_done) { + ret = sdhci_msm_hs400_dll_calibration(host); + if (!ret) + msm_host->calibration_done = true; + else + pr_err("%s: Failed to calibrate DLL for hs400 mode (%d)\n", + mmc_hostname(host->mmc), ret); + } +} + static void sdhci_msm_set_uhs_signaling(struct sdhci_host *host, unsigned int uhs) { @@ -952,12 +974,10 @@ static void sdhci_msm_set_uhs_signaling(struct sdhci_host *host, sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2); spin_unlock_irq(&host->lock); - /* CDCLP533 HW calibration is only required for HS400 mode*/ - if (host->clock > CORE_FREQ_100MHZ && - msm_host->tuning_done && !msm_host->calibration_done && - mmc->ios.timing == MMC_TIMING_MMC_HS400) - if (!sdhci_msm_hs400_dll_calibration(host)) - msm_host->calibration_done = true; + + if (mmc->ios.timing == MMC_TIMING_MMC_HS400) + sdhci_msm_hs400(host, &mmc->ios); + spin_lock_irq(&host->lock); }