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 <pramod.gurav@xxxxxxxxxx>
---
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 <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"
@@ -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
--
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