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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>
This commit is contained in:
Mark Brown 2012-03-31 23:31:55 -04:00 committed by Chris Ball
parent d5e9c02cab
commit 9f4e8151db
1 changed files with 28 additions and 0 deletions
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28
drivers/mmc/host/sdhci-s3c.c
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@ -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)