From patchwork Fri Jul 7 18:11:12 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhoujie Wu X-Patchwork-Id: 9830941 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 90368602BD for ; Fri, 7 Jul 2017 18:09:56 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5C75B27F85 for ; Fri, 7 Jul 2017 18:09:56 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 508B028609; Fri, 7 Jul 2017 18:09:56 +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 C36CE27F85 for ; Fri, 7 Jul 2017 18:09:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751023AbdGGSJz (ORCPT ); Fri, 7 Jul 2017 14:09:55 -0400 Received: from mx0b-0016f401.pphosted.com ([67.231.156.173]:47530 "EHLO mx0b-0016f401.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750938AbdGGSJy (ORCPT ); Fri, 7 Jul 2017 14:09:54 -0400 Received: from pps.filterd (m0045851.ppops.net [127.0.0.1]) by mx0b-0016f401.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id v67I4WPF026435; Fri, 7 Jul 2017 11:09:50 -0700 Received: from sc-exch01.marvell.com ([199.233.58.181]) by mx0b-0016f401.pphosted.com with ESMTP id 2bjd3egegt-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Fri, 07 Jul 2017 11:09:50 -0700 Received: from SC-EXCH01.marvell.com (10.93.176.81) by SC-EXCH01.marvell.com (10.93.176.81) with Microsoft SMTP Server (TLS) id 15.0.1210.3; Fri, 7 Jul 2017 11:09:49 -0700 Received: from maili.marvell.com (10.93.176.43) by SC-EXCH01.marvell.com (10.93.176.81) with Microsoft SMTP Server id 15.0.1210.3 via Frontend Transport; Fri, 7 Jul 2017 11:09:48 -0700 Received: from an-git01.marvell.com (unknown [10.80.127.149]) by maili.marvell.com (Postfix) with ESMTP id 1A2343F703F; Fri, 7 Jul 2017 11:09:49 -0700 (PDT) From: Zhoujie Wu To: , , , , , , , , , , , CC: , , Subject: [PATCH] mmc: sdhci-xenon: Add Xenon SDHCI specific system-level PM support Date: Fri, 7 Jul 2017 11:11:12 -0700 Message-ID: <1499451072-16513-1-git-send-email-zjwu@marvell.com> X-Mailer: git-send-email 1.9.1 MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-07-07_09:, , signatures=0 X-Proofpoint-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1703280000 definitions=main-1707070299 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 Add Xenon specific system-level suspend and resume support. Especially during resume, re-configure Xenon specific registers since registers setting will be lost in suspend if Xenon is power off. Signed-off-by: Zhoujie Wu Tested-by: Jisheng Zhang --- drivers/mmc/host/sdhci-xenon.c | 42 +++++++++++++++++++++++++++++++++++++++++- 1 file changed, 41 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/host/sdhci-xenon.c b/drivers/mmc/host/sdhci-xenon.c index bc1781b..9f399c4 100644 --- a/drivers/mmc/host/sdhci-xenon.c +++ b/drivers/mmc/host/sdhci-xenon.c @@ -519,6 +519,46 @@ static int xenon_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM_SLEEP +static int xenon_suspend(struct device *dev) +{ + struct sdhci_host *host = dev_get_drvdata(dev); + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + int ret; + + ret = sdhci_suspend_host(host); + if (ret) + return ret; + + clk_disable_unprepare(pltfm_host->clk); + return ret; +} + +static int xenon_resume(struct device *dev) +{ + struct sdhci_host *host = dev_get_drvdata(dev); + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + int ret; + + ret = clk_prepare_enable(pltfm_host->clk); + if (ret) + return ret; + + /* + * If SoCs power off the entire Xenon, registers setting will + * be lost. + * Re-configure Xenon specific register to enable current SDHC + */ + ret = xenon_sdhc_prepare(host); + if (ret) + return ret; + + return sdhci_resume_host(host); +} +#endif + +static SIMPLE_DEV_PM_OPS(xenon_pmops, xenon_suspend, xenon_resume); + static const struct of_device_id sdhci_xenon_dt_ids[] = { { .compatible = "marvell,armada-ap806-sdhci",}, { .compatible = "marvell,armada-cp110-sdhci",}, @@ -531,7 +571,7 @@ static int xenon_remove(struct platform_device *pdev) .driver = { .name = "xenon-sdhci", .of_match_table = sdhci_xenon_dt_ids, - .pm = &sdhci_pltfm_pmops, + .pm = &xenon_pmops, }, .probe = xenon_probe, .remove = xenon_remove,