From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754383AbcFPMf2 (ORCPT ); Thu, 16 Jun 2016 08:35:28 -0400 Received: from mail-pf0-f173.google.com ([209.85.192.173]:34401 "EHLO mail-pf0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752492AbcFPMfV (ORCPT ); Thu, 16 Jun 2016 08:35:21 -0400 From: Pramod Gurav To: adrian.hunter@intel.com, ulf.hansson@linaro.org Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, Pramod Gurav Subject: [PATCH] mmc: sdhci-msm: Add pm_runtime and system PM support Date: Thu, 16 Jun 2016 18:05:09 +0530 Message-Id: <1466080509-24015-1-git-send-email-pramod.gurav@linaro.org> X-Mailer: git-send-email 1.8.2.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Provides runtime PM callbacks to enable and disable clock resources when idle. Also support system PM callbacks to be called during system suspend and resume. Signed-off-by: Pramod Gurav --- drivers/mmc/host/sdhci-msm.c | 57 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c index 0653fe7..f4394c8 100644 --- a/drivers/mmc/host/sdhci-msm.c +++ b/drivers/mmc/host/sdhci-msm.c @@ -18,6 +18,7 @@ #include #include #include +#include #include #include "sdhci-pltfm.h" @@ -549,6 +550,11 @@ static int sdhci_msm_probe(struct platform_device *pdev) if (ret) goto clk_disable; + platform_set_drvdata(pdev, msm_host); + + pm_runtime_set_active(&pdev->dev); + pm_runtime_enable(&pdev->dev); + return 0; clk_disable: @@ -580,12 +586,63 @@ static int sdhci_msm_remove(struct platform_device *pdev) return 0; } +static int sdhci_msm_runtime_suspend(struct device *dev) +{ + struct sdhci_msm_host *msm_host = dev_get_drvdata(dev); + + clk_disable_unprepare(msm_host->clk); + clk_disable_unprepare(msm_host->pclk); + + return 0; +} + +static int sdhci_msm_runtime_resume(struct device *dev) +{ + struct sdhci_msm_host *msm_host = dev_get_drvdata(dev); + int ret; + + ret = clk_prepare_enable(msm_host->clk); + if (ret) { + dev_err(dev, "clk_enable failed: %d\n", ret); + return ret; + } + ret = clk_prepare_enable(msm_host->pclk); + if (ret) { + dev_err(dev, "clk_enable failed: %d\n", ret); + clk_disable_unprepare(msm_host->clk); + return ret; + } + + return 0; +} + +static int sdhci_msm_suspend(struct device *dev) +{ + pm_runtime_force_suspend(dev); + + return 0; +} + +static int sdhci_msm_resume(struct device *dev) +{ + pm_runtime_force_resume(dev); + + return 0; +} + +static const struct dev_pm_ops sdhci_msm_pm_ops = { + SET_LATE_SYSTEM_SLEEP_PM_OPS(sdhci_msm_suspend, sdhci_msm_resume) + SET_RUNTIME_PM_OPS(sdhci_msm_runtime_suspend, sdhci_msm_runtime_resume, + NULL) +}; + static struct platform_driver sdhci_msm_driver = { .probe = sdhci_msm_probe, .remove = sdhci_msm_remove, .driver = { .name = "sdhci_msm", .of_match_table = sdhci_msm_dt_match, + .pm = &sdhci_msm_pm_ops, }, }; -- 1.8.2.1