diff options
Diffstat (limited to 'drivers/mmc/host/sdhci-msm.c')
| -rw-r--r-- | drivers/mmc/host/sdhci-msm.c | 68 |
1 files changed, 67 insertions, 1 deletions
diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c index 90ed2e12d345..b78d72f28864 100644 --- a/drivers/mmc/host/sdhci-msm.c +++ b/drivers/mmc/host/sdhci-msm.c @@ -18,6 +18,7 @@ #include <linux/of_device.h> #include <linux/delay.h> #include <linux/mmc/mmc.h> +#include <linux/pm_runtime.h> #include <linux/slab.h> #include "sdhci-pltfm.h" @@ -68,6 +69,7 @@ #define CMUX_SHIFT_PHASE_SHIFT 24 #define CMUX_SHIFT_PHASE_MASK (7 << CMUX_SHIFT_PHASE_SHIFT) +#define MSM_MMC_AUTOSUSPEND_DELAY_MS 50 struct sdhci_msm_host { struct platform_device *pdev; void __iomem *core_mem; /* MSM SDCC mapped address */ @@ -659,12 +661,26 @@ static int sdhci_msm_probe(struct platform_device *pdev) goto clk_disable; } + pm_runtime_get_noresume(&pdev->dev); + pm_runtime_set_active(&pdev->dev); + pm_runtime_enable(&pdev->dev); + pm_runtime_set_autosuspend_delay(&pdev->dev, + MSM_MMC_AUTOSUSPEND_DELAY_MS); + pm_runtime_use_autosuspend(&pdev->dev); + ret = sdhci_add_host(host); if (ret) - goto clk_disable; + goto pm_runtime_disable; + + pm_runtime_mark_last_busy(&pdev->dev); + pm_runtime_put_autosuspend(&pdev->dev); return 0; +pm_runtime_disable: + pm_runtime_disable(&pdev->dev); + pm_runtime_set_suspended(&pdev->dev); + pm_runtime_put_noidle(&pdev->dev); clk_disable: clk_disable_unprepare(msm_host->clk); pclk_disable: @@ -686,6 +702,11 @@ static int sdhci_msm_remove(struct platform_device *pdev) 0xffffffff); sdhci_remove_host(host, dead); + + pm_runtime_get_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); + pm_runtime_put_noidle(&pdev->dev); + clk_disable_unprepare(msm_host->clk); clk_disable_unprepare(msm_host->pclk); if (!IS_ERR(msm_host->bus_clk)) @@ -694,12 +715,57 @@ static int sdhci_msm_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM +static int sdhci_msm_runtime_suspend(struct device *dev) +{ + struct sdhci_host *host = dev_get_drvdata(dev); + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + + 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_host *host = dev_get_drvdata(dev); + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + int ret; + + ret = clk_prepare_enable(msm_host->clk); + if (ret) { + dev_err(dev, "clk_enable failed for core_clk: %d\n", ret); + return ret; + } + ret = clk_prepare_enable(msm_host->pclk); + if (ret) { + dev_err(dev, "clk_enable failed for iface_clk: %d\n", ret); + clk_disable_unprepare(msm_host->clk); + return ret; + } + + return 0; +} +#endif + +static const struct dev_pm_ops sdhci_msm_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, + pm_runtime_force_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, }, }; |