From mboxrd@z Thu Jan 1 00:00:00 1970 From: chaotian.jing@mediatek.com (Chaotian Jing) Date: Tue, 28 Apr 2015 17:48:41 +0800 Subject: [PATCH v3 3/7] mmc: mediatek: Add PM support for MMC driver In-Reply-To: <1430214525-19198-1-git-send-email-chaotian.jing@mediatek.com> References: <1430214525-19198-1-git-send-email-chaotian.jing@mediatek.com> Message-ID: <1430214525-19198-4-git-send-email-chaotian.jing@mediatek.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Add PM support for Mediatek MMC driver Signed-off-by: Chaotian Jing --- drivers/mmc/host/mtk-sd.c | 58 +++++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 53 insertions(+), 5 deletions(-) diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c index 30e688d..79177d9 100644 --- a/drivers/mmc/host/mtk-sd.c +++ b/drivers/mmc/host/mtk-sd.c @@ -22,6 +22,7 @@ #include #include #include +#include #include #include @@ -215,6 +216,7 @@ #define MSDC_ASYNC_FLAG (0x1 << 1) #define MSDC_MMAP_FLAG (0x1 << 2) +#define MTK_MMC_AUTOSUSPEND_DELAY 500 #define CMD_TIMEOUT (HZ/10 * 5) /* 100ms x5 */ #define DAT_TIMEOUT (HZ * 5) /* 1000ms x5 */ @@ -706,6 +708,9 @@ static void msdc_request_done(struct msdc_host *host, struct mmc_request *mrq) if (mrq->data) msdc_unprepare_data(host, mrq); mmc_request_done(host->mmc, mrq); + + pm_runtime_mark_last_busy(host->dev); + pm_runtime_put_autosuspend(host->dev); } /* returns true if command is fully handled; returns false otherwise */ @@ -862,6 +867,8 @@ static void msdc_ops_request(struct mmc_host *mmc, struct mmc_request *mrq) WARN_ON(host->mrq); spin_unlock_irqrestore(&host->lock, flags); + pm_runtime_get_sync(host->dev); + if (mrq->data) msdc_prepare_data(host, mrq); @@ -999,7 +1006,6 @@ static int msdc_ops_switch_volt(struct mmc_host *mmc, struct mmc_ios *ios) int ret = 0; if (!IS_ERR(mmc->supply.vqmmc)) { - if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) { min_uv = 3300000; max_uv = 3300000; @@ -1018,7 +1024,6 @@ static int msdc_ops_switch_volt(struct mmc_host *mmc, struct mmc_ios *ios) ret, min_uv, max_uv); } } - return ret; } @@ -1176,8 +1181,10 @@ static void msdc_ops_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) int ret; u32 ddr = 0; + pm_runtime_get_sync(host->dev); + if (ios->timing == MMC_TIMING_UHS_DDR50 || - ios->timing == MMC_TIMING_MMC_DDR52) + ios->timing == MMC_TIMING_MMC_DDR52) ddr = 1; msdc_set_buswidth(host, ios->bus_width); @@ -1191,7 +1198,7 @@ static void msdc_ops_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) ios->vdd); if (ret) { dev_err(host->dev, "Failed to set vmmc power!\n"); - return; + goto end; } } break; @@ -1227,6 +1234,10 @@ static void msdc_ops_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) if (host->mclk != ios->clock || host->ddr != ddr) msdc_set_mclk(host, ddr, ios->clock); + +end: + pm_runtime_mark_last_busy(host->dev); + pm_runtime_put_autosuspend(host->dev); } static struct mmc_host_ops mt_msdc_ops = { @@ -1350,12 +1361,19 @@ static int msdc_drv_probe(struct platform_device *pdev) if (ret) goto release; + pm_runtime_set_active(host->dev); + pm_runtime_set_autosuspend_delay(host->dev, MTK_MMC_AUTOSUSPEND_DELAY); + pm_runtime_use_autosuspend(host->dev); + pm_runtime_enable(host->dev); ret = mmc_add_host(mmc); + if (ret) - goto release; + goto end; return 0; +end: + pm_runtime_disable(host->dev); release: platform_set_drvdata(pdev, NULL); msdc_deinit_hw(host); @@ -1368,6 +1386,7 @@ release_mem: dma_free_coherent(&pdev->dev, MAX_BD_NUM * sizeof(struct mt_bdma_desc), host->dma.bd, host->dma.bd_addr); + host_free: mmc_free_host(mmc); @@ -1382,10 +1401,14 @@ static int msdc_drv_remove(struct platform_device *pdev) mmc = platform_get_drvdata(pdev); host = mmc_priv(mmc); + pm_runtime_get_sync(host->dev); + platform_set_drvdata(pdev, NULL); mmc_remove_host(host->mmc); msdc_deinit_hw(host); + pm_runtime_disable(host->dev); + pm_runtime_put_noidle(host->dev); dma_free_coherent(&pdev->dev, sizeof(struct mt_gpdma_desc), host->dma.gpd, host->dma.gpd_addr); @@ -1397,6 +1420,30 @@ static int msdc_drv_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM +static int msdc_runtime_suspend(struct device *dev) +{ + struct mmc_host *mmc = dev_get_drvdata(dev); + struct msdc_host *host = mmc_priv(mmc); + + msdc_gate_clock(host); + return 0; +} + +static int msdc_runtime_resume(struct device *dev) +{ + struct mmc_host *mmc = dev_get_drvdata(dev); + struct msdc_host *host = mmc_priv(mmc); + + msdc_ungate_clock(host); + return 0; +} +#endif + +static const struct dev_pm_ops msdc_dev_pm_ops = { + SET_RUNTIME_PM_OPS(msdc_runtime_suspend, msdc_runtime_resume, NULL) +}; + static const struct of_device_id msdc_of_ids[] = { { .compatible = "mediatek,mt8135-mmc", }, {} @@ -1408,6 +1455,7 @@ static struct platform_driver mt_msdc_driver = { .driver = { .name = "mtk-msdc", .of_match_table = msdc_of_ids, + .pm = &msdc_dev_pm_ops, }, }; -- 1.8.1.1.dirty