Commit 0646caf7 authored by Vikas Sajjan's avatar Vikas Sajjan Committed by Felipe Balbi
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usb: dwc3: exynos: add basic suspend/resume support 



Adds suspend and resume callbacks to exynos dwc3 driver as part of
power management support.

This change does gating of dwc3 clock during suspend/resume cycles.

Signed-off-by: default avatarAbhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: default avatarVikas C Sajjan <vikas.sajjan@linaro.org>
CC: Doug Anderson <dianders@chromium.org>
Tested-by: default avatarVivek Gautam <gautam.vivek@samsung.com>

[ balbi@ti.com : refreshed to current linus/master ]

Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent f3e117f4

drivers/usb/dwc3/dwc3-exynos.c

+34 −0
Original line number Diff line number Diff line
@@ -187,12 +187,46 @@ static const struct of_device_id exynos_dwc3_match[] = { 
MODULE_DEVICE_TABLE(of, exynos_dwc3_match);

#endif



#ifdef CONFIG_PM

static int dwc3_exynos_suspend(struct device *dev)

{

	struct dwc3_exynos *exynos = dev_get_drvdata(dev);



	clk_disable(exynos->clk);



	return 0;

}



static int dwc3_exynos_resume(struct device *dev)

{

	struct dwc3_exynos *exynos = dev_get_drvdata(dev);



	clk_enable(exynos->clk);



	/* runtime set active to reflect active state. */

	pm_runtime_disable(dev);

	pm_runtime_set_active(dev);

	pm_runtime_enable(dev);



	return 0;

}



static const struct dev_pm_ops dwc3_exynos_dev_pm_ops = {

	SET_SYSTEM_SLEEP_PM_OPS(dwc3_exynos_suspend, dwc3_exynos_resume)

};



#define DEV_PM_OPS	(&dwc3_exynos_dev_pm_ops)

#else

#define DEV_PM_OPS	NULL

#endif /* CONFIG_PM */



static struct platform_driver dwc3_exynos_driver = {

	.probe		= dwc3_exynos_probe,

	.remove		= dwc3_exynos_remove,

	.driver		= {

		.name	= "exynos-dwc3",

		.of_match_table = of_match_ptr(exynos_dwc3_match),

		.pm	= DEV_PM_OPS,

	},

};