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usb: dwc3: omap: add basic suspend/resume support

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this patch implements basic suspend/resume
functionality for the OMAP glue layer.

Tested-by: Vivek Gautam <gautam.vivek@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Felipe Balbi
2013-02-11 11:12:02 +02:00
parent 1d9a00eeca
commit f3e117f443
1 changed files with 56 additions and 0 deletions
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56
drivers/usb/dwc3/dwc3-omap.c
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@ -121,6 +121,8 @@ struct dwc3_omap {
int irq; int irq;
void __iomem *base; void __iomem *base;
u32 utmi_otg_status;
u32 dma_status:1; u32 dma_status:1;
}; };
@ -402,12 +404,66 @@ static const struct of_device_id of_dwc3_match[] = {
}; };
MODULE_DEVICE_TABLE(of, of_dwc3_match); MODULE_DEVICE_TABLE(of, of_dwc3_match);
#ifdef CONFIG_PM
static int dwc3_omap_prepare(struct device *dev)
{
struct dwc3_omap *omap = dev_get_drvdata(dev);
dwc3_omap_disable_irqs(omap);
return 0;
}
static void dwc3_omap_complete(struct device *dev)
{
struct dwc3_omap *omap = dev_get_drvdata(dev);
dwc3_omap_enable_irqs(omap);
}
static int dwc3_omap_suspend(struct device *dev)
{
struct dwc3_omap *omap = dev_get_drvdata(dev);
omap->utmi_otg_status = dwc3_omap_readl(omap->base,
USBOTGSS_UTMI_OTG_STATUS);
return 0;
}
static int dwc3_omap_resume(struct device *dev)
{
struct dwc3_omap *omap = dev_get_drvdata(dev);
dwc3_omap_writel(omap->base, USBOTGSS_UTMI_OTG_STATUS,
omap->utmi_otg_status);
pm_runtime_disable(dev);
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
return 0;
}
static const struct dev_pm_ops dwc3_omap_dev_pm_ops = {
.prepare = dwc3_omap_prepare,
.complete = dwc3_omap_complete,
SET_SYSTEM_SLEEP_PM_OPS(dwc3_omap_suspend, dwc3_omap_resume)
};
#define DEV_PM_OPS (&dwc3_omap_dev_pm_ops)
#else
#define DEV_PM_OPS NULL
#endif /* CONFIG_PM */
static struct platform_driver dwc3_omap_driver = { static struct platform_driver dwc3_omap_driver = {
.probe = dwc3_omap_probe, .probe = dwc3_omap_probe,
.remove = dwc3_omap_remove, .remove = dwc3_omap_remove,
.driver = { .driver = {
.name = "omap-dwc3", .name = "omap-dwc3",
.of_match_table = of_dwc3_match, .of_match_table = of_dwc3_match,
.pm = DEV_PM_OPS,
}, },
}; };