Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit ed692a99 authored by Vivek Gautam's avatar Vivek Gautam Committed by Felipe Balbi
Browse files

usb: dwc3: exynos: Add provision for AXI UpScaler clock on exynos7 



DWC3 controller on Exynos7 SoC has separate control for
AXI UpScaler which connects DWC3 DRD controller to AXI bus.
Get the gate clock for the same to control it across power
cycles.

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 72d996fc

Documentation/devicetree/bindings/usb/exynos-usb.txt

+4 −2
Original line number Original line Diff line number Diff line
@@ -82,8 +82,10 @@ Example: 




DWC3

DWC3

Required properties:

Required properties:

 - compatible: should be "samsung,exynos5250-dwusb3" for USB 3.0 DWC3

 - compatible: should be one of the following -

	       controller.

	       "samsung,exynos5250-dwusb3": for USB 3.0 DWC3 controller on

					    Exynos5250/5420.

	       "samsung,exynos7-dwusb3": for USB 3.0 DWC3 controller on Exynos7.

 - #address-cells, #size-cells : should be '1' if the device has sub-nodes

 - #address-cells, #size-cells : should be '1' if the device has sub-nodes

				 with 'reg' property.

				 with 'reg' property.

 - ranges: allows valid 1:1 translation between child's address space and

 - ranges: allows valid 1:1 translation between child's address space and

drivers/usb/dwc3/dwc3-exynos.c

+17 −0
Original line number Original line Diff line number Diff line
@@ -35,6 +35,7 @@ struct dwc3_exynos { 




	struct clk		*clk;

	struct clk		*clk;

	struct clk		*susp_clk;

	struct clk		*susp_clk;

	struct clk		*axius_clk;





	struct regulator	*vdd33;

	struct regulator	*vdd33;

	struct regulator	*vdd10;

	struct regulator	*vdd10;
@@ -149,6 +150,17 @@ static int dwc3_exynos_probe(struct platform_device *pdev) 
	}

	}

	clk_prepare_enable(exynos->susp_clk);

	clk_prepare_enable(exynos->susp_clk);





	if (of_device_is_compatible(node, "samsung,exynos7-dwusb3")) {

		exynos->axius_clk = devm_clk_get(dev, "usbdrd30_axius_clk");

		if (IS_ERR(exynos->axius_clk)) {

			dev_err(dev, "no AXI UpScaler clk specified\n");

			return -ENODEV;

		}

		clk_prepare_enable(exynos->axius_clk);

	} else {

		exynos->axius_clk = NULL;

	}



	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);
@@ -190,6 +202,7 @@ 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->axius_clk);

	clk_disable_unprepare(exynos->susp_clk);

	clk_disable_unprepare(exynos->susp_clk);

	clk_disable_unprepare(exynos->clk);

	clk_disable_unprepare(exynos->clk);

	return ret;

	return ret;
@@ -203,6 +216,7 @@ 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->axius_clk);

	clk_disable_unprepare(exynos->susp_clk);

	clk_disable_unprepare(exynos->susp_clk);

	clk_disable_unprepare(exynos->clk);

	clk_disable_unprepare(exynos->clk);
@@ -214,6 +228,7 @@ static int dwc3_exynos_remove(struct platform_device *pdev) 




static const struct of_device_id exynos_dwc3_match[] = {

static const struct of_device_id exynos_dwc3_match[] = {

	{ .compatible = "samsung,exynos5250-dwusb3" },

	{ .compatible = "samsung,exynos5250-dwusb3" },

	{ .compatible = "samsung,exynos7-dwusb3" },

	{},

	{},

};

};

MODULE_DEVICE_TABLE(of, exynos_dwc3_match);

MODULE_DEVICE_TABLE(of, exynos_dwc3_match);
@@ -223,6 +238,7 @@ static int dwc3_exynos_suspend(struct device *dev) 
{

{

	struct dwc3_exynos *exynos = dev_get_drvdata(dev);

	struct dwc3_exynos *exynos = dev_get_drvdata(dev);





	clk_disable(exynos->axius_clk);

	clk_disable(exynos->clk);

	clk_disable(exynos->clk);





	regulator_disable(exynos->vdd33);

	regulator_disable(exynos->vdd33);
@@ -248,6 +264,7 @@ static int dwc3_exynos_resume(struct device *dev) 
	}

	}





	clk_enable(exynos->clk);

	clk_enable(exynos->clk);

	clk_enable(exynos->axius_clk);





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

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

	pm_runtime_disable(dev);

	pm_runtime_disable(dev);