mmc: dw_mmc-rockchip: add runtime PM support

This patch adds runtime PM support for dw_mmc-rockchip.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/host/dw_mmc-rockchip.c b/drivers/mmc/host/dw_mmc-rockchip.c
index 25eae359a5ea181b00986a0aabe8cd3a5a76bd8b..0a05ad3c5fbf9d0c966ca2abe4f3cd4cbf7d62c1 100644 (file)
--- a/drivers/mmc/host/dw_mmc-rockchip.c
+++ b/drivers/mmc/host/dw_mmc-rockchip.c
@@ -13,6 +13,7 @@
 #include <linux/mmc/host.h>
 #include <linux/mmc/dw_mmc.h>
 #include <linux/of_address.h>
+#include <linux/pm_runtime.h>
 #include <linux/slab.h>
 
 #include "dw_mmc.h"
@@ -325,6 +326,7 @@ static int dw_mci_rockchip_probe(struct platform_device *pdev)
 {
        const struct dw_mci_drv_data *drv_data;
        const struct of_device_id *match;
+       int ret;
 
        if (!pdev->dev.of_node)
                return -ENODEV;
@@ -332,16 +334,49 @@ static int dw_mci_rockchip_probe(struct platform_device *pdev)
        match = of_match_node(dw_mci_rockchip_match, pdev->dev.of_node);
        drv_data = match->data;
 
-       return dw_mci_pltfm_register(pdev, drv_data);
+       pm_runtime_get_noresume(&pdev->dev);
+       pm_runtime_set_active(&pdev->dev);
+       pm_runtime_enable(&pdev->dev);
+       pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
+       pm_runtime_use_autosuspend(&pdev->dev);
+
+       ret = dw_mci_pltfm_register(pdev, drv_data);
+       if (ret) {
+               pm_runtime_disable(&pdev->dev);
+               pm_runtime_set_suspended(&pdev->dev);
+               pm_runtime_put_noidle(&pdev->dev);
+               return ret;
+       }
+
+       pm_runtime_put_autosuspend(&pdev->dev);
+
+       return 0;
 }
 
+static int dw_mci_rockchip_remove(struct platform_device *pdev)
+{
+       pm_runtime_get_sync(&pdev->dev);
+       pm_runtime_disable(&pdev->dev);
+       pm_runtime_put_noidle(&pdev->dev);
+
+       return dw_mci_pltfm_remove(pdev);
+}
+
+static const struct dev_pm_ops dw_mci_rockchip_dev_pm_ops = {
+       SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+                               pm_runtime_force_resume)
+       SET_RUNTIME_PM_OPS(dw_mci_runtime_suspend,
+                          dw_mci_runtime_resume,
+                          NULL)
+};
+
 static struct platform_driver dw_mci_rockchip_pltfm_driver = {
        .probe          = dw_mci_rockchip_probe,
-       .remove         = dw_mci_pltfm_remove,
+       .remove         = dw_mci_rockchip_remove,
        .driver         = {
                .name           = "dwmmc_rockchip",
                .of_match_table = dw_mci_rockchip_match,
-               .pm             = &dw_mci_pltfm_pmops,
+               .pm             = &dw_mci_rockchip_dev_pm_ops,
        },
 };