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mmc: sdhci-spear: Implement suspend/resume

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Suspend/Resume is missing from sdhci-spear driver. This patch adds
support for suspend/resume for this driver.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Viresh Kumar 2011-11-15 16:24:40 +05:30 committed by Chris Ball
parent 597dd9d79c
commit b70a7fab26
1 changed files with 40 additions and 0 deletions
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40
drivers/mmc/host/sdhci-spear.c
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@ -21,6 +21,7 @@
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/slab.h>
#include <linux/mmc/host.h>
#include <linux/mmc/sdhci-spear.h>
@ -271,10 +272,49 @@ static int __devexit sdhci_remove(struct platform_device *pdev)
return 0;
}
#ifdef CONFIG_PM
static int sdhci_suspend(struct device *dev)
{
struct sdhci_host *host = dev_get_drvdata(dev);
struct spear_sdhci *sdhci = dev_get_platdata(dev);
pm_message_t state = {.event = 0};
int ret;
ret = sdhci_suspend_host(host, state);
if (!ret)
clk_disable(sdhci->clk);
return ret;
}
static int sdhci_resume(struct device *dev)
{
struct sdhci_host *host = dev_get_drvdata(dev);
struct spear_sdhci *sdhci = dev_get_platdata(dev);
int ret;
ret = clk_enable(sdhci->clk);
if (ret) {
dev_dbg(dev, "Resume: Error enabling clock\n");
return ret;
}
return sdhci_resume_host(host);
}
const struct dev_pm_ops sdhci_pm_ops = {
.suspend = sdhci_suspend,
.resume = sdhci_resume,
};
#endif
static struct platform_driver sdhci_driver = {
.driver = {
.name = "sdhci",
.owner = THIS_MODULE,
#ifdef CONFIG_PM
.pm = &sdhci_pm_ops,
#endif
},
.probe = sdhci_probe,
.remove = __devexit_p(sdhci_remove),