The root clock will be disabled in runtime pm which can be used to save power.
Signed-off-by: Dong Aisheng <[email protected]> --- drivers/mmc/host/sdhci-esdhc-imx.c | 53 ++++++++++++++++++++++++++++++++++- 1 files changed, 51 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c index da8026b..60201fd 100644 --- a/drivers/mmc/host/sdhci-esdhc-imx.c +++ b/drivers/mmc/host/sdhci-esdhc-imx.c @@ -27,6 +27,7 @@ #include <linux/of_gpio.h> #include <linux/pinctrl/consumer.h> #include <linux/platform_data/mmc-esdhc-imx.h> +#include <linux/pm_runtime.h> #include "sdhci-pltfm.h" #include "sdhci-esdhc.h" @@ -1117,9 +1118,17 @@ static int sdhci_esdhc_imx_probe(struct platform_device *pdev) host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V; } + pm_runtime_enable(&pdev->dev); + pm_runtime_set_autosuspend_delay(&pdev->dev, 50); + pm_runtime_use_autosuspend(&pdev->dev); + pm_suspend_ignore_children(&pdev->dev, 1); + err = sdhci_add_host(host); - if (err) + if (err) { + pm_runtime_forbid(&pdev->dev); + pm_runtime_get_noresume(&pdev->dev); goto disable_clk; + } return 0; @@ -1141,6 +1150,9 @@ static int sdhci_esdhc_imx_remove(struct platform_device *pdev) sdhci_remove_host(host, dead); + pm_runtime_dont_use_autosuspend(&pdev->dev); + pm_runtime_disable(&pdev->dev); + clk_disable_unprepare(imx_data->clk_per); clk_disable_unprepare(imx_data->clk_ipg); clk_disable_unprepare(imx_data->clk_ahb); @@ -1150,12 +1162,49 @@ static int sdhci_esdhc_imx_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM_RUNTIME +static int sdhci_esdhc_runtime_suspend(struct device *dev) +{ + struct sdhci_host *host = dev_get_drvdata(dev); + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct pltfm_imx_data *imx_data = pltfm_host->priv; + int ret; + + ret = sdhci_runtime_suspend_host(host); + + clk_disable_unprepare(imx_data->clk_per); + clk_disable_unprepare(imx_data->clk_ipg); + clk_disable_unprepare(imx_data->clk_ahb); + + return ret; +} + +static int sdhci_esdhc_runtime_resume(struct device *dev) +{ + struct sdhci_host *host = dev_get_drvdata(dev); + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct pltfm_imx_data *imx_data = pltfm_host->priv; + + clk_prepare_enable(imx_data->clk_per); + clk_prepare_enable(imx_data->clk_ipg); + clk_prepare_enable(imx_data->clk_ahb); + + return sdhci_runtime_resume_host(host); +} +#endif + +static const struct dev_pm_ops sdhci_esdhc_pmops = { + SET_SYSTEM_SLEEP_PM_OPS(sdhci_pltfm_suspend, sdhci_pltfm_resume) + SET_RUNTIME_PM_OPS(sdhci_esdhc_runtime_suspend, + sdhci_esdhc_runtime_resume, NULL) +}; + static struct platform_driver sdhci_esdhc_imx_driver = { .driver = { .name = "sdhci-esdhc-imx", .owner = THIS_MODULE, .of_match_table = imx_esdhc_dt_ids, - .pm = SDHCI_PLTFM_PMOPS, + .pm = &sdhci_esdhc_pmops, }, .id_table = imx_esdhc_devtype, .probe = sdhci_esdhc_imx_probe, -- 1.7.2.rc3 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
