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Commit f3e117f4 authored by Felipe Balbi's avatar Felipe Balbi
Browse files

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



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

Tested-by: default avatarVivek Gautam <gautam.vivek@samsung.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent 1d9a00ee

drivers/usb/dwc3/dwc3-omap.c

+56 −0
Original line number Diff line number Diff line
@@ -121,6 +121,8 @@ struct dwc3_omap { 
	int			irq;

	void __iomem		*base;



	u32			utmi_otg_status;



	u32			dma_status:1;

};
@@ -402,12 +404,66 @@ static const struct of_device_id 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 = {

	.probe		= dwc3_omap_probe,

	.remove		= dwc3_omap_remove,

	.driver		= {

		.name	= "omap-dwc3",

		.of_match_table	= of_dwc3_match,

		.pm	= DEV_PM_OPS,

	},

};