drivers/usb/dwc3/dwc3-imx.c - linux/kernel/git/klassert/ipsec-next - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 /*
  * dwc3-imx.c - NXP i.MX Soc USB3 Specific Glue layer
  *
  * Copyright 2026 NXP
  */

 #include <linux/clk.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>

 #include "core.h"
 #include "glue.h"

 /* USB wakeup registers */
 #define USB_WAKEUP_CTRL			0x00

 /* Global wakeup interrupt enable, also used to clear interrupt */
 #define USB_WAKEUP_EN			BIT(31)
 /* Wakeup from connect or disconnect, only for superspeed */
 #define USB_WAKEUP_SS_CONN		BIT(5)
 /* 0 select vbus_valid, 1 select sessvld */
 #define USB_WAKEUP_VBUS_SRC_SESS_VAL	BIT(4)
 /* Enable signal for wake up from u3 state */
 #define USB_WAKEUP_U3_EN		BIT(3)
 /* Enable signal for wake up from id change */
 #define USB_WAKEUP_ID_EN		BIT(2)
 /* Enable signal for wake up from vbus change */
 #define	USB_WAKEUP_VBUS_EN		BIT(1)
 /* Enable signal for wake up from dp/dm change */
 #define USB_WAKEUP_DPDM_EN		BIT(0)

 #define USB_WAKEUP_EN_MASK		GENMASK(5, 0)

 /* USB glue registers */
 #define USB_CTRL0		0x00
 #define USB_CTRL1		0x04

 #define USB_CTRL0_PORTPWR_EN	BIT(12) /* 1 - PPC enabled (default) */
 #define USB_CTRL0_USB3_FIXED	BIT(22) /* 1 - USB3 permanent attached */
 #define USB_CTRL0_USB2_FIXED	BIT(23) /* 1 - USB2 permanent attached */

 #define USB_CTRL1_OC_POLARITY	BIT(16) /* 0 - HIGH / 1 - LOW */
 #define USB_CTRL1_PWR_POLARITY	BIT(17) /* 0 - HIGH / 1 - LOW */

 struct dwc3_imx {
 	struct dwc3	dwc;
 	struct device	*dev;
 	void __iomem	*blkctl_base;
 	void __iomem	*glue_base;
 	struct clk	*hsio_clk;
 	struct clk	*suspend_clk;
 	int		irq;
 	bool		pm_suspended;
 	bool		wakeup_pending;
 	unsigned	permanent_attached:1;
 	unsigned	disable_pwr_ctrl:1;
 	unsigned	overcur_active_low:1;
 	unsigned	power_active_low:1;
 };

 #define to_dwc3_imx(d) container_of((d), struct dwc3_imx, dwc)

 static void dwc3_imx_get_property(struct dwc3_imx *dwc_imx)
 {
 	struct device	*dev = dwc_imx->dev;

 	dwc_imx->permanent_attached =
 		device_property_read_bool(dev, "fsl,permanently-attached");
 	dwc_imx->disable_pwr_ctrl =
 		device_property_read_bool(dev, "fsl,disable-port-power-control");
 	dwc_imx->overcur_active_low =
 		device_property_read_bool(dev, "fsl,over-current-active-low");
 	dwc_imx->power_active_low =
 		device_property_read_bool(dev, "fsl,power-active-low");
 }

 static void dwc3_imx_configure_glue(struct dwc3_imx *dwc_imx)
 {
 	u32		value;

 	if (!dwc_imx->glue_base)
 		return;

 	value = readl(dwc_imx->glue_base + USB_CTRL0);

 	if (dwc_imx->permanent_attached)
 		value |= USB_CTRL0_USB2_FIXED | USB_CTRL0_USB3_FIXED;
 	else
 		value &= ~(USB_CTRL0_USB2_FIXED | USB_CTRL0_USB3_FIXED);

 	if (dwc_imx->disable_pwr_ctrl)
 		value &= ~USB_CTRL0_PORTPWR_EN;
 	else
 		value |= USB_CTRL0_PORTPWR_EN;

 	writel(value, dwc_imx->glue_base + USB_CTRL0);

 	value = readl(dwc_imx->glue_base + USB_CTRL1);
 	if (dwc_imx->overcur_active_low)
 		value |= USB_CTRL1_OC_POLARITY;
 	else
 		value &= ~USB_CTRL1_OC_POLARITY;

 	if (dwc_imx->power_active_low)
 		value |= USB_CTRL1_PWR_POLARITY;
 	else
 		value &= ~USB_CTRL1_PWR_POLARITY;

 	writel(value, dwc_imx->glue_base + USB_CTRL1);
 }

 static void dwc3_imx_wakeup_enable(struct dwc3_imx *dwc_imx, pm_message_t msg)
 {
 	struct dwc3	*dwc = &dwc_imx->dwc;
 	u32		val;

 	val = readl(dwc_imx->blkctl_base + USB_WAKEUP_CTRL);

 	if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_HOST && dwc->xhci) {
 		val |= USB_WAKEUP_EN | USB_WAKEUP_DPDM_EN;
 		if (PMSG_IS_AUTO(msg))
 			val |= USB_WAKEUP_SS_CONN | USB_WAKEUP_U3_EN;
 	} else {
 		val |= USB_WAKEUP_EN | USB_WAKEUP_VBUS_EN |
 		       USB_WAKEUP_VBUS_SRC_SESS_VAL;
 	}

 	writel(val, dwc_imx->blkctl_base + USB_WAKEUP_CTRL);
 }

 static void dwc3_imx_wakeup_disable(struct dwc3_imx *dwc_imx)
 {
 	u32	val;

 	val = readl(dwc_imx->blkctl_base + USB_WAKEUP_CTRL);
 	val &= ~(USB_WAKEUP_EN | USB_WAKEUP_EN_MASK);
 	writel(val, dwc_imx->blkctl_base + USB_WAKEUP_CTRL);
 }

 static irqreturn_t dwc3_imx_interrupt(int irq, void *data)
 {
 	struct dwc3_imx	*dwc_imx = data;
 	struct dwc3	*dwc = &dwc_imx->dwc;

 	if (!dwc_imx->pm_suspended)
 		return IRQ_HANDLED;

 	disable_irq_nosync(dwc_imx->irq);
 	dwc_imx->wakeup_pending = true;

 	if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_HOST && dwc->xhci)
 		pm_runtime_resume(&dwc->xhci->dev);
 	else if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_DEVICE)
 		pm_runtime_get(dwc->dev);

 	return IRQ_HANDLED;
 }

 static void dwc3_imx_pre_set_role(struct dwc3 *dwc, enum usb_role role)
 {
 	if (role == USB_ROLE_HOST)
 		/*
 		 * For xhci host, we need disable dwc core auto
 		 * suspend, because during this auto suspend delay(5s),
 		 * xhci host RUN_STOP is cleared and wakeup is not
 		 * enabled, if device is inserted, xhci host can't
 		 * response the connection.
 		 */
 		pm_runtime_dont_use_autosuspend(dwc->dev);
 	else
 		pm_runtime_use_autosuspend(dwc->dev);
 }

 static struct dwc3_glue_ops dwc3_imx_glue_ops = {
 	.pre_set_role = dwc3_imx_pre_set_role,
 };

 static const struct property_entry dwc3_imx_properties[] = {
 	PROPERTY_ENTRY_BOOL("xhci-missing-cas-quirk"),
 	PROPERTY_ENTRY_BOOL("xhci-skip-phy-init-quirk"),
 	{},
 };

 static const struct software_node dwc3_imx_swnode = {
 	.properties = dwc3_imx_properties,
 };

 static int dwc3_imx_probe(struct platform_device *pdev)
 {
 	struct device		*dev = &pdev->dev;
 	struct dwc3_imx		*dwc_imx;
 	struct dwc3		*dwc;
 	struct resource		*res;
 	const char		*irq_name;
 	struct dwc3_probe_data	probe_data = {};
 	int			ret, irq;

 	dwc_imx = devm_kzalloc(dev, sizeof(*dwc_imx), GFP_KERNEL);
 	if (!dwc_imx)
 		return -ENOMEM;

 	platform_set_drvdata(pdev, dwc_imx);
 	dwc_imx->dev = dev;

 	dwc3_imx_get_property(dwc_imx);

 	dwc_imx->blkctl_base = devm_platform_ioremap_resource_byname(pdev, "blkctl");
 	if (IS_ERR(dwc_imx->blkctl_base))
 		return PTR_ERR(dwc_imx->blkctl_base);

 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "glue");
 	if (!res) {
 		dev_warn(dev, "Base address for glue layer missing\n");
 	} else {
 		dwc_imx->glue_base = devm_ioremap_resource(dev, res);
 		if (IS_ERR(dwc_imx->glue_base))
 			return PTR_ERR(dwc_imx->glue_base);
 	}

 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "core");
 	if (!res)
 		return dev_err_probe(dev, -ENODEV, "missing core memory resource\n");

 	dwc_imx->hsio_clk = devm_clk_get_enabled(dev, "hsio");
 	if (IS_ERR(dwc_imx->hsio_clk))
 		return dev_err_probe(dev, PTR_ERR(dwc_imx->hsio_clk),
 				     "Failed to get hsio clk\n");

 	dwc_imx->suspend_clk = devm_clk_get_enabled(dev, "suspend");
 	if (IS_ERR(dwc_imx->suspend_clk))
 		return dev_err_probe(dev, PTR_ERR(dwc_imx->suspend_clk),
 				     "Failed to get suspend clk\n");

 	irq = platform_get_irq_byname(pdev, "wakeup");
 	if (irq < 0)
 		return irq;
 	dwc_imx->irq = irq;

 	irq_name = devm_kasprintf(dev, GFP_KERNEL, "%s:wakeup", dev_name(dev));
 	if (!irq_name)
 		return dev_err_probe(dev, -ENOMEM, "failed to create irq_name\n");

 	ret = devm_request_threaded_irq(dev, irq, NULL, dwc3_imx_interrupt,
 					IRQF_ONESHOT | IRQF_NO_AUTOEN,
 					irq_name, dwc_imx);
 	if (ret)
 		return dev_err_probe(dev, ret, "failed to request IRQ #%d\n", irq);

 	ret = device_add_software_node(dev, &dwc3_imx_swnode);
 	if (ret)
 		return dev_err_probe(dev, ret, "failed to add software node\n");

 	dwc3_imx_configure_glue(dwc_imx);

 	dwc = &dwc_imx->dwc;
 	dwc->dev = dev;
 	dwc->glue_ops = &dwc3_imx_glue_ops;

 	probe_data.res = res;
 	probe_data.dwc = dwc;
 	probe_data.properties = DWC3_DEFAULT_PROPERTIES;
 	probe_data.properties.needs_full_reinit = true;

 	ret = dwc3_core_probe(&probe_data);
 	if (ret) {
 		device_remove_software_node(dev);
 		return ret;
 	}

 	device_set_wakeup_capable(dev, true);
 	return 0;
 }

 static void dwc3_imx_remove(struct platform_device *pdev)
 {
 	struct device	*dev = &pdev->dev;
 	struct dwc3	*dwc = dev_get_drvdata(dev);

 	dwc3_core_remove(dwc);
 	device_remove_software_node(dev);
 }

 static void dwc3_imx_suspend(struct dwc3_imx *dwc_imx, pm_message_t msg)
 {
 	if (dwc_imx->pm_suspended)
 		return;

 	if (PMSG_IS_AUTO(msg) || device_may_wakeup(dwc_imx->dev))
 		dwc3_imx_wakeup_enable(dwc_imx, msg);

 	enable_irq(dwc_imx->irq);
 	dwc_imx->pm_suspended = true;
 }

 static void dwc3_imx_resume(struct dwc3_imx *dwc_imx, pm_message_t msg)
 {
 	struct dwc3	*dwc = &dwc_imx->dwc;

 	if (!dwc_imx->pm_suspended)
 		return;

 	dwc_imx->pm_suspended = false;
 	if (!dwc_imx->wakeup_pending)
 		disable_irq_nosync(dwc_imx->irq);

 	dwc3_imx_wakeup_disable(dwc_imx);

 	/* Upon power loss any previous configuration is lost, restore it */
 	dwc3_imx_configure_glue(dwc_imx);

 	if (dwc_imx->wakeup_pending) {
 		dwc_imx->wakeup_pending = false;
 		if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_DEVICE)
 			pm_runtime_put_autosuspend(dwc->dev);
 		else
 			/*
 			 * Add wait for xhci switch from suspend
 			 * clock to normal clock to detect connection.
 			 */
 			usleep_range(9000, 10000);
 	}
 }

 static int dwc3_imx_runtime_suspend(struct device *dev)
 {
 	struct dwc3	*dwc = dev_get_drvdata(dev);
 	struct dwc3_imx	*dwc_imx = to_dwc3_imx(dwc);
 	int		ret;

 	ret = dwc3_runtime_suspend(dwc);
 	if (ret)
 		return ret;

 	dwc3_imx_suspend(dwc_imx, PMSG_AUTO_SUSPEND);
 	return 0;
 }

 static int dwc3_imx_runtime_resume(struct device *dev)
 {
 	struct dwc3	*dwc = dev_get_drvdata(dev);
 	struct dwc3_imx	*dwc_imx = to_dwc3_imx(dwc);

 	dwc3_imx_resume(dwc_imx, PMSG_AUTO_RESUME);
 	return dwc3_runtime_resume(dwc);
 }

 static int dwc3_imx_runtime_idle(struct device *dev)
 {
 	return dwc3_runtime_idle(dev_get_drvdata(dev));
 }

 static int dwc3_imx_pm_suspend(struct device *dev)
 {
 	struct dwc3	*dwc = dev_get_drvdata(dev);
 	struct dwc3_imx *dwc_imx = to_dwc3_imx(dwc);
 	int		ret;

 	ret = dwc3_pm_suspend(dwc);
 	if (ret)
 		return ret;

 	dwc3_imx_suspend(dwc_imx, PMSG_SUSPEND);

 	if (device_may_wakeup(dev)) {
 		enable_irq_wake(dwc_imx->irq);
 		device_set_out_band_wakeup(dev);
 	} else {
 		clk_disable_unprepare(dwc_imx->suspend_clk);
 	}

 	clk_disable_unprepare(dwc_imx->hsio_clk);

 	return 0;
 }

 static int dwc3_imx_pm_resume(struct device *dev)
 {
 	struct dwc3	*dwc = dev_get_drvdata(dev);
 	struct dwc3_imx *dwc_imx = to_dwc3_imx(dwc);
 	int		ret;

 	if (device_may_wakeup(dwc_imx->dev)) {
 		disable_irq_wake(dwc_imx->irq);
 	} else {
 		ret = clk_prepare_enable(dwc_imx->suspend_clk);
 		if (ret)
 			return ret;
 	}

 	ret = clk_prepare_enable(dwc_imx->hsio_clk);
 	if (ret) {
 		clk_disable_unprepare(dwc_imx->suspend_clk);
 		return ret;
 	}

 	dwc3_imx_resume(dwc_imx, PMSG_RESUME);

 	ret = dwc3_pm_resume(dwc);
 	if (ret)
 		return ret;

 	return 0;
 }

 static void dwc3_imx_complete(struct device *dev)
 {
 	dwc3_pm_complete(dev_get_drvdata(dev));
 }

 static int dwc3_imx_prepare(struct device *dev)
 {
 	return dwc3_pm_prepare(dev_get_drvdata(dev));
 }

 static const struct dev_pm_ops dwc3_imx_dev_pm_ops = {
 	SYSTEM_SLEEP_PM_OPS(dwc3_imx_pm_suspend, dwc3_imx_pm_resume)
 	RUNTIME_PM_OPS(dwc3_imx_runtime_suspend, dwc3_imx_runtime_resume,
 		       dwc3_imx_runtime_idle)
 	.complete = pm_sleep_ptr(dwc3_imx_complete),
 	.prepare = pm_sleep_ptr(dwc3_imx_prepare),
 };

 static const struct of_device_id dwc3_imx_of_match[] = {
 	{ .compatible = "nxp,imx8mp-dwc3", },
 	{},
 };
 MODULE_DEVICE_TABLE(of, dwc3_imx_of_match);

 static struct platform_driver dwc3_imx_driver = {
 	.probe		= dwc3_imx_probe,
 	.remove		= dwc3_imx_remove,
 	.driver		= {
 		.name	= "imx-dwc3",
 		.pm	= pm_ptr(&dwc3_imx_dev_pm_ops),
 		.of_match_table	= dwc3_imx_of_match,
 	},
 };

 module_platform_driver(dwc3_imx_driver);

 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("DesignWare USB3 i.MX Glue Layer");
	// SPDX-License-Identifier: GPL-2.0
	/*
	* dwc3-imx.c - NXP i.MX Soc USB3 Specific Glue layer
	*
	* Copyright 2026 NXP
	*/

	#include <linux/clk.h>
	#include <linux/interrupt.h>
	#include <linux/io.h>
	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/of_platform.h>
	#include <linux/platform_device.h>
	#include <linux/pm_runtime.h>

	#include "core.h"
	#include "glue.h"

	/* USB wakeup registers */
	#define USB_WAKEUP_CTRL 0x00

	/* Global wakeup interrupt enable, also used to clear interrupt */
	#define USB_WAKEUP_EN BIT(31)
	/* Wakeup from connect or disconnect, only for superspeed */
	#define USB_WAKEUP_SS_CONN BIT(5)
	/* 0 select vbus_valid, 1 select sessvld */
	#define USB_WAKEUP_VBUS_SRC_SESS_VAL BIT(4)
	/* Enable signal for wake up from u3 state */
	#define USB_WAKEUP_U3_EN BIT(3)
	/* Enable signal for wake up from id change */
	#define USB_WAKEUP_ID_EN BIT(2)
	/* Enable signal for wake up from vbus change */
	#define USB_WAKEUP_VBUS_EN BIT(1)
	/* Enable signal for wake up from dp/dm change */
	#define USB_WAKEUP_DPDM_EN BIT(0)

	#define USB_WAKEUP_EN_MASK GENMASK(5, 0)

	/* USB glue registers */
	#define USB_CTRL0 0x00
	#define USB_CTRL1 0x04

	#define USB_CTRL0_PORTPWR_EN BIT(12) /* 1 - PPC enabled (default) */
	#define USB_CTRL0_USB3_FIXED BIT(22) /* 1 - USB3 permanent attached */
	#define USB_CTRL0_USB2_FIXED BIT(23) /* 1 - USB2 permanent attached */

	#define USB_CTRL1_OC_POLARITY BIT(16) /* 0 - HIGH / 1 - LOW */
	#define USB_CTRL1_PWR_POLARITY BIT(17) /* 0 - HIGH / 1 - LOW */

	struct dwc3_imx {
	struct dwc3 dwc;
	struct device *dev;
	void __iomem *blkctl_base;
	void __iomem *glue_base;
	struct clk *hsio_clk;
	struct clk *suspend_clk;
	int irq;
	bool pm_suspended;
	bool wakeup_pending;
	unsigned permanent_attached:1;
	unsigned disable_pwr_ctrl:1;
	unsigned overcur_active_low:1;
	unsigned power_active_low:1;
	};

	#define to_dwc3_imx(d) container_of((d), struct dwc3_imx, dwc)

	static void dwc3_imx_get_property(struct dwc3_imx *dwc_imx)
	{
	struct device *dev = dwc_imx->dev;

	dwc_imx->permanent_attached =
	device_property_read_bool(dev, "fsl,permanently-attached");
	dwc_imx->disable_pwr_ctrl =
	device_property_read_bool(dev, "fsl,disable-port-power-control");
	dwc_imx->overcur_active_low =
	device_property_read_bool(dev, "fsl,over-current-active-low");
	dwc_imx->power_active_low =
	device_property_read_bool(dev, "fsl,power-active-low");
	}

	static void dwc3_imx_configure_glue(struct dwc3_imx *dwc_imx)
	{
	u32 value;

	if (!dwc_imx->glue_base)
	return;

	value = readl(dwc_imx->glue_base + USB_CTRL0);

	if (dwc_imx->permanent_attached)
	value \|= USB_CTRL0_USB2_FIXED \| USB_CTRL0_USB3_FIXED;
	else
	value &= ~(USB_CTRL0_USB2_FIXED \| USB_CTRL0_USB3_FIXED);

	if (dwc_imx->disable_pwr_ctrl)
	value &= ~USB_CTRL0_PORTPWR_EN;
	else
	value \|= USB_CTRL0_PORTPWR_EN;

	writel(value, dwc_imx->glue_base + USB_CTRL0);

	value = readl(dwc_imx->glue_base + USB_CTRL1);
	if (dwc_imx->overcur_active_low)
	value \|= USB_CTRL1_OC_POLARITY;
	else
	value &= ~USB_CTRL1_OC_POLARITY;

	if (dwc_imx->power_active_low)
	value \|= USB_CTRL1_PWR_POLARITY;
	else
	value &= ~USB_CTRL1_PWR_POLARITY;

	writel(value, dwc_imx->glue_base + USB_CTRL1);
	}

	static void dwc3_imx_wakeup_enable(struct dwc3_imx *dwc_imx, pm_message_t msg)
	{
	struct dwc3 *dwc = &dwc_imx->dwc;
	u32 val;

	val = readl(dwc_imx->blkctl_base + USB_WAKEUP_CTRL);

	if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_HOST && dwc->xhci) {
	val \|= USB_WAKEUP_EN \| USB_WAKEUP_DPDM_EN;
	if (PMSG_IS_AUTO(msg))
	val \|= USB_WAKEUP_SS_CONN \| USB_WAKEUP_U3_EN;
	} else {
	val \|= USB_WAKEUP_EN \| USB_WAKEUP_VBUS_EN \|
	USB_WAKEUP_VBUS_SRC_SESS_VAL;
	}

	writel(val, dwc_imx->blkctl_base + USB_WAKEUP_CTRL);
	}

	static void dwc3_imx_wakeup_disable(struct dwc3_imx *dwc_imx)
	{
	u32 val;

	val = readl(dwc_imx->blkctl_base + USB_WAKEUP_CTRL);
	val &= ~(USB_WAKEUP_EN \| USB_WAKEUP_EN_MASK);
	writel(val, dwc_imx->blkctl_base + USB_WAKEUP_CTRL);
	}

	static irqreturn_t dwc3_imx_interrupt(int irq, void *data)
	{
	struct dwc3_imx *dwc_imx = data;
	struct dwc3 *dwc = &dwc_imx->dwc;

	if (!dwc_imx->pm_suspended)
	return IRQ_HANDLED;

	disable_irq_nosync(dwc_imx->irq);
	dwc_imx->wakeup_pending = true;

	if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_HOST && dwc->xhci)
	pm_runtime_resume(&dwc->xhci->dev);
	else if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_DEVICE)
	pm_runtime_get(dwc->dev);

	return IRQ_HANDLED;
	}

	static void dwc3_imx_pre_set_role(struct dwc3 *dwc, enum usb_role role)
	{
	if (role == USB_ROLE_HOST)
	/*
	* For xhci host, we need disable dwc core auto
	* suspend, because during this auto suspend delay(5s),
	* xhci host RUN_STOP is cleared and wakeup is not
	* enabled, if device is inserted, xhci host can't
	* response the connection.
	*/
	pm_runtime_dont_use_autosuspend(dwc->dev);
	else
	pm_runtime_use_autosuspend(dwc->dev);
	}

	static struct dwc3_glue_ops dwc3_imx_glue_ops = {
	.pre_set_role = dwc3_imx_pre_set_role,
	};

	static const struct property_entry dwc3_imx_properties[] = {
	PROPERTY_ENTRY_BOOL("xhci-missing-cas-quirk"),
	PROPERTY_ENTRY_BOOL("xhci-skip-phy-init-quirk"),
	{},
	};

	static const struct software_node dwc3_imx_swnode = {
	.properties = dwc3_imx_properties,
	};

	static int dwc3_imx_probe(struct platform_device *pdev)
	{
	struct device *dev = &pdev->dev;
	struct dwc3_imx *dwc_imx;
	struct dwc3 *dwc;
	struct resource *res;
	const char *irq_name;
	struct dwc3_probe_data probe_data = {};
	int ret, irq;

	dwc_imx = devm_kzalloc(dev, sizeof(*dwc_imx), GFP_KERNEL);
	if (!dwc_imx)
	return -ENOMEM;

	platform_set_drvdata(pdev, dwc_imx);
	dwc_imx->dev = dev;

	dwc3_imx_get_property(dwc_imx);

	dwc_imx->blkctl_base = devm_platform_ioremap_resource_byname(pdev, "blkctl");
	if (IS_ERR(dwc_imx->blkctl_base))
	return PTR_ERR(dwc_imx->blkctl_base);

	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "glue");
	if (!res) {
	dev_warn(dev, "Base address for glue layer missing\n");
	} else {
	dwc_imx->glue_base = devm_ioremap_resource(dev, res);
	if (IS_ERR(dwc_imx->glue_base))
	return PTR_ERR(dwc_imx->glue_base);
	}

	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "core");
	if (!res)
	return dev_err_probe(dev, -ENODEV, "missing core memory resource\n");

	dwc_imx->hsio_clk = devm_clk_get_enabled(dev, "hsio");
	if (IS_ERR(dwc_imx->hsio_clk))
	return dev_err_probe(dev, PTR_ERR(dwc_imx->hsio_clk),
	"Failed to get hsio clk\n");

	dwc_imx->suspend_clk = devm_clk_get_enabled(dev, "suspend");
	if (IS_ERR(dwc_imx->suspend_clk))
	return dev_err_probe(dev, PTR_ERR(dwc_imx->suspend_clk),
	"Failed to get suspend clk\n");

	irq = platform_get_irq_byname(pdev, "wakeup");
	if (irq < 0)
	return irq;
	dwc_imx->irq = irq;

	irq_name = devm_kasprintf(dev, GFP_KERNEL, "%s:wakeup", dev_name(dev));
	if (!irq_name)
	return dev_err_probe(dev, -ENOMEM, "failed to create irq_name\n");

	ret = devm_request_threaded_irq(dev, irq, NULL, dwc3_imx_interrupt,
	IRQF_ONESHOT \| IRQF_NO_AUTOEN,
	irq_name, dwc_imx);
	if (ret)
	return dev_err_probe(dev, ret, "failed to request IRQ #%d\n", irq);

	ret = device_add_software_node(dev, &dwc3_imx_swnode);
	if (ret)
	return dev_err_probe(dev, ret, "failed to add software node\n");

	dwc3_imx_configure_glue(dwc_imx);

	dwc = &dwc_imx->dwc;
	dwc->dev = dev;
	dwc->glue_ops = &dwc3_imx_glue_ops;

	probe_data.res = res;
	probe_data.dwc = dwc;
	probe_data.properties = DWC3_DEFAULT_PROPERTIES;
	probe_data.properties.needs_full_reinit = true;

	ret = dwc3_core_probe(&probe_data);
	if (ret) {
	device_remove_software_node(dev);
	return ret;
	}

	device_set_wakeup_capable(dev, true);
	return 0;
	}

	static void dwc3_imx_remove(struct platform_device *pdev)
	{
	struct device *dev = &pdev->dev;
	struct dwc3 *dwc = dev_get_drvdata(dev);

	dwc3_core_remove(dwc);
	device_remove_software_node(dev);
	}

	static void dwc3_imx_suspend(struct dwc3_imx *dwc_imx, pm_message_t msg)
	{
	if (dwc_imx->pm_suspended)
	return;

	if (PMSG_IS_AUTO(msg) \|\| device_may_wakeup(dwc_imx->dev))
	dwc3_imx_wakeup_enable(dwc_imx, msg);

	enable_irq(dwc_imx->irq);
	dwc_imx->pm_suspended = true;
	}

	static void dwc3_imx_resume(struct dwc3_imx *dwc_imx, pm_message_t msg)
	{
	struct dwc3 *dwc = &dwc_imx->dwc;

	if (!dwc_imx->pm_suspended)
	return;

	dwc_imx->pm_suspended = false;
	if (!dwc_imx->wakeup_pending)
	disable_irq_nosync(dwc_imx->irq);

	dwc3_imx_wakeup_disable(dwc_imx);

	/* Upon power loss any previous configuration is lost, restore it */
	dwc3_imx_configure_glue(dwc_imx);

	if (dwc_imx->wakeup_pending) {
	dwc_imx->wakeup_pending = false;
	if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_DEVICE)
	pm_runtime_put_autosuspend(dwc->dev);
	else
	/*
	* Add wait for xhci switch from suspend
	* clock to normal clock to detect connection.
	*/
	usleep_range(9000, 10000);
	}
	}

	static int dwc3_imx_runtime_suspend(struct device *dev)
	{
	struct dwc3 *dwc = dev_get_drvdata(dev);
	struct dwc3_imx *dwc_imx = to_dwc3_imx(dwc);
	int ret;

	ret = dwc3_runtime_suspend(dwc);
	if (ret)
	return ret;

	dwc3_imx_suspend(dwc_imx, PMSG_AUTO_SUSPEND);
	return 0;
	}

	static int dwc3_imx_runtime_resume(struct device *dev)
	{
	struct dwc3 *dwc = dev_get_drvdata(dev);
	struct dwc3_imx *dwc_imx = to_dwc3_imx(dwc);

	dwc3_imx_resume(dwc_imx, PMSG_AUTO_RESUME);
	return dwc3_runtime_resume(dwc);
	}

	static int dwc3_imx_runtime_idle(struct device *dev)
	{
	return dwc3_runtime_idle(dev_get_drvdata(dev));
	}

	static int dwc3_imx_pm_suspend(struct device *dev)
	{
	struct dwc3 *dwc = dev_get_drvdata(dev);
	struct dwc3_imx *dwc_imx = to_dwc3_imx(dwc);
	int ret;

	ret = dwc3_pm_suspend(dwc);
	if (ret)
	return ret;

	dwc3_imx_suspend(dwc_imx, PMSG_SUSPEND);

	if (device_may_wakeup(dev)) {
	enable_irq_wake(dwc_imx->irq);
	device_set_out_band_wakeup(dev);
	} else {
	clk_disable_unprepare(dwc_imx->suspend_clk);
	}

	clk_disable_unprepare(dwc_imx->hsio_clk);

	return 0;
	}

	static int dwc3_imx_pm_resume(struct device *dev)
	{
	struct dwc3 *dwc = dev_get_drvdata(dev);
	struct dwc3_imx *dwc_imx = to_dwc3_imx(dwc);
	int ret;

	if (device_may_wakeup(dwc_imx->dev)) {
	disable_irq_wake(dwc_imx->irq);
	} else {
	ret = clk_prepare_enable(dwc_imx->suspend_clk);
	if (ret)
	return ret;
	}

	ret = clk_prepare_enable(dwc_imx->hsio_clk);
	if (ret) {
	clk_disable_unprepare(dwc_imx->suspend_clk);
	return ret;
	}

	dwc3_imx_resume(dwc_imx, PMSG_RESUME);

	ret = dwc3_pm_resume(dwc);
	if (ret)
	return ret;

	return 0;
	}

	static void dwc3_imx_complete(struct device *dev)
	{
	dwc3_pm_complete(dev_get_drvdata(dev));
	}

	static int dwc3_imx_prepare(struct device *dev)
	{
	return dwc3_pm_prepare(dev_get_drvdata(dev));
	}

	static const struct dev_pm_ops dwc3_imx_dev_pm_ops = {
	SYSTEM_SLEEP_PM_OPS(dwc3_imx_pm_suspend, dwc3_imx_pm_resume)
	RUNTIME_PM_OPS(dwc3_imx_runtime_suspend, dwc3_imx_runtime_resume,
	dwc3_imx_runtime_idle)
	.complete = pm_sleep_ptr(dwc3_imx_complete),
	.prepare = pm_sleep_ptr(dwc3_imx_prepare),
	};

	static const struct of_device_id dwc3_imx_of_match[] = {
	{ .compatible = "nxp,imx8mp-dwc3", },
	{},
	};
	MODULE_DEVICE_TABLE(of, dwc3_imx_of_match);

	static struct platform_driver dwc3_imx_driver = {
	.probe = dwc3_imx_probe,
	.remove = dwc3_imx_remove,
	.driver = {
	.name = "imx-dwc3",
	.pm = pm_ptr(&dwc3_imx_dev_pm_ops),
	.of_match_table = dwc3_imx_of_match,
	},
	};

	module_platform_driver(dwc3_imx_driver);

	MODULE_LICENSE("GPL");
	MODULE_DESCRIPTION("DesignWare USB3 i.MX Glue Layer");