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authorMark Brown <broonie@opensource.wolfsonmicro.com>2012-03-31 23:31:55 -0400
committerChris Ball <cjb@laptop.org>2012-04-05 20:32:20 -0400
commit9f4e8151dbbc4ca4d5dd7792666a50c137102204 (patch)
treec27bcdcac25a557010910177098cd071e3977107 /drivers
parentd5e9c02cab60920d5ac16a8244bb6085dc27564f (diff)
mmc: sdhci-s3c: Enable runtime power management
Since most of the work is already done by the core we just need to add runtime suspend methods and tell the PM core that runtime PM is enabled for this device. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/mmc/host/sdhci-s3c.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-s3c.c b/drivers/mmc/host/sdhci-s3c.c
index 2ea3e6b8bd6a..55a164fcaa15 100644
--- a/drivers/mmc/host/sdhci-s3c.c
+++ b/drivers/mmc/host/sdhci-s3c.c
@@ -23,6 +23,7 @@
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/pm.h>
+#include <linux/pm_runtime.h>
#include <linux/mmc/host.h>
@@ -593,9 +594,16 @@ static int __devinit sdhci_s3c_probe(struct platform_device *pdev)
if (pdata->host_caps2)
host->mmc->caps2 |= pdata->host_caps2;
+ 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);
+
ret = sdhci_add_host(host);
if (ret) {
dev_err(dev, "sdhci_add_host() failed\n");
+ pm_runtime_forbid(&pdev->dev);
+ pm_runtime_get_noresume(&pdev->dev);
goto err_req_regs;
}
@@ -646,6 +654,8 @@ static int __devexit sdhci_s3c_remove(struct platform_device *pdev)
sdhci_remove_host(host, 1);
+ pm_runtime_disable(&pdev->dev);
+
for (ptr = 0; ptr < 3; ptr++) {
if (sc->clk_bus[ptr]) {
clk_disable(sc->clk_bus[ptr]);
@@ -677,9 +687,27 @@ static int sdhci_s3c_resume(struct device *dev)
}
#endif
+#ifdef CONFIG_PM_RUNTIME
+static int sdhci_s3c_runtime_suspend(struct device *dev)
+{
+ struct sdhci_host *host = dev_get_drvdata(dev);
+
+ return sdhci_runtime_suspend_host(host);
+}
+
+static int sdhci_s3c_runtime_resume(struct device *dev)
+{
+ struct sdhci_host *host = dev_get_drvdata(dev);
+
+ return sdhci_runtime_resume_host(host);
+}
+#endif
+
#ifdef CONFIG_PM
static const struct dev_pm_ops sdhci_s3c_pmops = {
SET_SYSTEM_SLEEP_PM_OPS(sdhci_s3c_suspend, sdhci_s3c_resume)
+ SET_RUNTIME_PM_OPS(sdhci_s3c_runtime_suspend, sdhci_s3c_runtime_resume,
+ NULL)
};
#define SDHCI_S3C_PMOPS (&sdhci_s3c_pmops)