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Commit b70a7fab authored by Viresh Kumar's avatar Viresh Kumar Committed by Chris Ball
Browse files

mmc: sdhci-spear: Implement suspend/resume 



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

Signed-off-by: default avatarViresh Kumar <viresh.kumar@st.com>
Signed-off-by: default avatarChris Ball <cjb@laptop.org>
parent 597dd9d7

drivers/mmc/host/sdhci-spear.c

+40 −0
Original line number Diff line number Diff line
@@ -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),