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Commit 72d996fc authored by Vivek Gautam's avatar Vivek Gautam Committed by Felipe Balbi
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usb: dwc3: exynos: Add provision for suspend clock 



DWC3 controller on Exynos SoC series have separate control for
suspend clock which replaces pipe3_rx_pclk as clock source to
a small part of DWC3 core that operates when SS PHY is in its
lowest power state (P3) in states SS.disabled and U3.

Suggested-by: default avatarAnton Tikhomirov <av.tikhomirov@samsung.com>
Signed-off-by: default avatarVivek Gautam <gautam.vivek@samsung.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent c1a3acaa

drivers/usb/dwc3/dwc3-exynos.c

+11 −0
Original line number Original line Diff line number Diff line
@@ -34,6 +34,8 @@ struct dwc3_exynos { 
	struct device		*dev;

	struct device		*dev;





	struct clk		*clk;

	struct clk		*clk;

	struct clk		*susp_clk;



	struct regulator	*vdd33;

	struct regulator	*vdd33;

	struct regulator	*vdd10;

	struct regulator	*vdd10;

};

};
@@ -140,6 +142,13 @@ static int dwc3_exynos_probe(struct platform_device *pdev) 
	}

	}

	clk_prepare_enable(exynos->clk);

	clk_prepare_enable(exynos->clk);





	exynos->susp_clk = devm_clk_get(dev, "usbdrd30_susp_clk");

	if (IS_ERR(exynos->susp_clk)) {

		dev_dbg(dev, "no suspend clk specified\n");

		exynos->susp_clk = NULL;

	}

	clk_prepare_enable(exynos->susp_clk);



	exynos->vdd33 = devm_regulator_get(dev, "vdd33");

	exynos->vdd33 = devm_regulator_get(dev, "vdd33");

	if (IS_ERR(exynos->vdd33)) {

	if (IS_ERR(exynos->vdd33)) {

		ret = PTR_ERR(exynos->vdd33);

		ret = PTR_ERR(exynos->vdd33);
@@ -181,6 +190,7 @@ static int dwc3_exynos_probe(struct platform_device *pdev) 
err3:

err3:

	regulator_disable(exynos->vdd33);

	regulator_disable(exynos->vdd33);

err2:

err2:

	clk_disable_unprepare(exynos->susp_clk);

	clk_disable_unprepare(exynos->clk);

	clk_disable_unprepare(exynos->clk);

	return ret;

	return ret;

}

}
@@ -193,6 +203,7 @@ static int dwc3_exynos_remove(struct platform_device *pdev) 
	platform_device_unregister(exynos->usb2_phy);

	platform_device_unregister(exynos->usb2_phy);

	platform_device_unregister(exynos->usb3_phy);

	platform_device_unregister(exynos->usb3_phy);





	clk_disable_unprepare(exynos->susp_clk);

	clk_disable_unprepare(exynos->clk);

	clk_disable_unprepare(exynos->clk);





	regulator_disable(exynos->vdd33);

	regulator_disable(exynos->vdd33);