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| author | Viresh Kumar <viresh.kumar@st.com> | 2011-11-15 10:54:40 (GMT) |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2012-01-12 04:58:41 (GMT) |
| commit | b70a7fab26db65f7daaf04f49a3bd673250f48c7 (patch) | |
| tree | 14a99b660e277fa15aadbbfe29d369a8b5845417 | |
| parent | 597dd9d79cfbbb1636d00a7fd0880355d9b20c41 (diff) | |
| download | linux-b70a7fab26db65f7daaf04f49a3bd673250f48c7.tar.xz | |
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: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
| -rw-r--r-- | drivers/mmc/host/sdhci-spear.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-spear.c b/drivers/mmc/host/sdhci-spear.c index 63cc8b6..dee70b6 100644 --- a/drivers/mmc/host/sdhci-spear.c +++ b/drivers/mmc/host/sdhci-spear.c @@ -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), |