[linux-2.6-block.git] / drivers / usb / dwc3 / dwc3-imx8mp.c

// SPDX-License-Identifier: GPL-2.0
/*
 * dwc3-imx8mp.c - NXP imx8mp Specific Glue layer
 *
 * Copyright (c) 2020 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"

/* 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)

struct dwc3_imx8mp {
	struct device			*dev;
	struct platform_device		*dwc3;
	void __iomem			*glue_base;
	struct clk			*hsio_clk;
	struct clk			*suspend_clk;
	int				irq;
	bool				pm_suspended;
	bool				wakeup_pending;
};

static void dwc3_imx8mp_wakeup_enable(struct dwc3_imx8mp *dwc3_imx)
{
	struct dwc3	*dwc3 = platform_get_drvdata(dwc3_imx->dwc3);
	u32		val;

	if (!dwc3)
		return;

	val = readl(dwc3_imx->glue_base + USB_WAKEUP_CTRL);

	if ((dwc3->current_dr_role == DWC3_GCTL_PRTCAP_HOST) && dwc3->xhci)
		val |= USB_WAKEUP_EN | USB_WAKEUP_SS_CONN |
		       USB_WAKEUP_U3_EN | USB_WAKEUP_DPDM_EN;
	else if (dwc3->current_dr_role == DWC3_GCTL_PRTCAP_DEVICE)
		val |= USB_WAKEUP_EN | USB_WAKEUP_VBUS_EN |
		       USB_WAKEUP_VBUS_SRC_SESS_VAL;

	writel(val, dwc3_imx->glue_base + USB_WAKEUP_CTRL);
}

static void dwc3_imx8mp_wakeup_disable(struct dwc3_imx8mp *dwc3_imx)
{
	u32 val;

	val = readl(dwc3_imx->glue_base + USB_WAKEUP_CTRL);
	val &= ~(USB_WAKEUP_EN | USB_WAKEUP_EN_MASK);
	writel(val, dwc3_imx->glue_base + USB_WAKEUP_CTRL);
}

static irqreturn_t dwc3_imx8mp_interrupt(int irq, void *_dwc3_imx)
{
	struct dwc3_imx8mp	*dwc3_imx = _dwc3_imx;
	struct dwc3		*dwc = platform_get_drvdata(dwc3_imx->dwc3);

	if (!dwc3_imx->pm_suspended)
		return IRQ_HANDLED;

	disable_irq_nosync(dwc3_imx->irq);
	dwc3_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 int dwc3_imx8mp_probe(struct platform_device *pdev)
{
	struct device		*dev = &pdev->dev;
	struct device_node	*dwc3_np, *node = dev->of_node;
	struct dwc3_imx8mp	*dwc3_imx;
	int			err, irq;

	if (!node) {
		dev_err(dev, "device node not found\n");
		return -EINVAL;
	}

	dwc3_imx = devm_kzalloc(dev, sizeof(*dwc3_imx), GFP_KERNEL);
	if (!dwc3_imx)
		return -ENOMEM;

	platform_set_drvdata(pdev, dwc3_imx);

	dwc3_imx->dev = dev;

	dwc3_imx->glue_base = devm_platform_ioremap_resource(pdev, 0);
	if (IS_ERR(dwc3_imx->glue_base))
		return PTR_ERR(dwc3_imx->glue_base);

	dwc3_imx->hsio_clk = devm_clk_get(dev, "hsio");
	if (IS_ERR(dwc3_imx->hsio_clk)) {
		err = PTR_ERR(dwc3_imx->hsio_clk);
		dev_err(dev, "Failed to get hsio clk, err=%d\n", err);
		return err;
	}

	err = clk_prepare_enable(dwc3_imx->hsio_clk);
	if (err) {
		dev_err(dev, "Failed to enable hsio clk, err=%d\n", err);
		return err;
	}

	dwc3_imx->suspend_clk = devm_clk_get(dev, "suspend");
	if (IS_ERR(dwc3_imx->suspend_clk)) {
		err = PTR_ERR(dwc3_imx->suspend_clk);
		dev_err(dev, "Failed to get suspend clk, err=%d\n", err);
		goto disable_hsio_clk;
	}

	err = clk_prepare_enable(dwc3_imx->suspend_clk);
	if (err) {
		dev_err(dev, "Failed to enable suspend clk, err=%d\n", err);
		goto disable_hsio_clk;
	}

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		err = irq;
		goto disable_clks;
	}
	dwc3_imx->irq = irq;

	pm_runtime_set_active(dev);
	pm_runtime_enable(dev);
	err = pm_runtime_get_sync(dev);
	if (err < 0)
		goto disable_rpm;

	dwc3_np = of_get_compatible_child(node, "snps,dwc3");
	if (!dwc3_np) {
		err = -ENODEV;
		dev_err(dev, "failed to find dwc3 core child\n");
		goto disable_rpm;
	}

	err = of_platform_populate(node, NULL, NULL, dev);
	if (err) {
		dev_err(&pdev->dev, "failed to create dwc3 core\n");
		goto err_node_put;
	}

	dwc3_imx->dwc3 = of_find_device_by_node(dwc3_np);
	if (!dwc3_imx->dwc3) {
		dev_err(dev, "failed to get dwc3 platform device\n");
		err = -ENODEV;
		goto depopulate;
	}
	of_node_put(dwc3_np);

	err = devm_request_threaded_irq(dev, irq, NULL, dwc3_imx8mp_interrupt,
					IRQF_ONESHOT, dev_name(dev), dwc3_imx);
	if (err) {
		dev_err(dev, "failed to request IRQ #%d --> %d\n", irq, err);
		goto depopulate;
	}

	device_set_wakeup_capable(dev, true);
	pm_runtime_put(dev);

	return 0;

depopulate:
	of_platform_depopulate(dev);
err_node_put:
	of_node_put(dwc3_np);
disable_rpm:
	pm_runtime_disable(dev);
	pm_runtime_put_noidle(dev);
disable_clks:
	clk_disable_unprepare(dwc3_imx->suspend_clk);
disable_hsio_clk:
	clk_disable_unprepare(dwc3_imx->hsio_clk);

	return err;
}

static int dwc3_imx8mp_remove(struct platform_device *pdev)
{
	struct dwc3_imx8mp *dwc3_imx = platform_get_drvdata(pdev);
	struct device *dev = &pdev->dev;

	pm_runtime_get_sync(dev);
	of_platform_depopulate(dev);

	clk_disable_unprepare(dwc3_imx->suspend_clk);
	clk_disable_unprepare(dwc3_imx->hsio_clk);

	pm_runtime_disable(dev);
	pm_runtime_put_noidle(dev);
	platform_set_drvdata(pdev, NULL);

	return 0;
}

static int __maybe_unused dwc3_imx8mp_suspend(struct dwc3_imx8mp *dwc3_imx,
					      pm_message_t msg)
{
	if (dwc3_imx->pm_suspended)
		return 0;

	/* Wakeup enable */
	if (PMSG_IS_AUTO(msg) || device_may_wakeup(dwc3_imx->dev))
		dwc3_imx8mp_wakeup_enable(dwc3_imx);

	dwc3_imx->pm_suspended = true;

	return 0;
}

static int __maybe_unused dwc3_imx8mp_resume(struct dwc3_imx8mp *dwc3_imx,
					     pm_message_t msg)
{
	struct dwc3	*dwc = platform_get_drvdata(dwc3_imx->dwc3);
	int ret = 0;

	if (!dwc3_imx->pm_suspended)
		return 0;

	/* Wakeup disable */
	dwc3_imx8mp_wakeup_disable(dwc3_imx);
	dwc3_imx->pm_suspended = false;

	if (dwc3_imx->wakeup_pending) {
		dwc3_imx->wakeup_pending = false;
		if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_DEVICE) {
			pm_runtime_mark_last_busy(dwc->dev);
			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);
		}
		enable_irq(dwc3_imx->irq);
	}

	return ret;
}

static int __maybe_unused dwc3_imx8mp_pm_suspend(struct device *dev)
{
	struct dwc3_imx8mp *dwc3_imx = dev_get_drvdata(dev);
	int ret;

	ret = dwc3_imx8mp_suspend(dwc3_imx, PMSG_SUSPEND);

	if (device_may_wakeup(dwc3_imx->dev))
		enable_irq_wake(dwc3_imx->irq);
	else
		clk_disable_unprepare(dwc3_imx->suspend_clk);

	clk_disable_unprepare(dwc3_imx->hsio_clk);
	dev_dbg(dev, "dwc3 imx8mp pm suspend.\n");

	return ret;
}

static int __maybe_unused dwc3_imx8mp_pm_resume(struct device *dev)
{
	struct dwc3_imx8mp *dwc3_imx = dev_get_drvdata(dev);
	int ret;

	if (device_may_wakeup(dwc3_imx->dev)) {
		disable_irq_wake(dwc3_imx->irq);
	} else {
		ret = clk_prepare_enable(dwc3_imx->suspend_clk);
		if (ret)
			return ret;
	}

	ret = clk_prepare_enable(dwc3_imx->hsio_clk);
	if (ret)
		return ret;

	ret = dwc3_imx8mp_resume(dwc3_imx, PMSG_RESUME);

	pm_runtime_disable(dev);
	pm_runtime_set_active(dev);
	pm_runtime_enable(dev);

	dev_dbg(dev, "dwc3 imx8mp pm resume.\n");

	return ret;
}

static int __maybe_unused dwc3_imx8mp_runtime_suspend(struct device *dev)
{
	struct dwc3_imx8mp *dwc3_imx = dev_get_drvdata(dev);

	dev_dbg(dev, "dwc3 imx8mp runtime suspend.\n");

	return dwc3_imx8mp_suspend(dwc3_imx, PMSG_AUTO_SUSPEND);
}

static int __maybe_unused dwc3_imx8mp_runtime_resume(struct device *dev)
{
	struct dwc3_imx8mp *dwc3_imx = dev_get_drvdata(dev);

	dev_dbg(dev, "dwc3 imx8mp runtime resume.\n");

	return dwc3_imx8mp_resume(dwc3_imx, PMSG_AUTO_RESUME);
}

static const struct dev_pm_ops dwc3_imx8mp_dev_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(dwc3_imx8mp_pm_suspend, dwc3_imx8mp_pm_resume)
	SET_RUNTIME_PM_OPS(dwc3_imx8mp_runtime_suspend,
			   dwc3_imx8mp_runtime_resume, NULL)
};

static const struct of_device_id dwc3_imx8mp_of_match[] = {
	{ .compatible = "fsl,imx8mp-dwc3", },
	{},
};
MODULE_DEVICE_TABLE(of, dwc3_imx8mp_of_match);

static struct platform_driver dwc3_imx8mp_driver = {
	.probe		= dwc3_imx8mp_probe,
	.remove		= dwc3_imx8mp_remove,
	.driver		= {
		.name	= "imx8mp-dwc3",
		.pm	= &dwc3_imx8mp_dev_pm_ops,
		.of_match_table	= dwc3_imx8mp_of_match,
	},
};

module_platform_driver(dwc3_imx8mp_driver);

MODULE_ALIAS("platform:imx8mp-dwc3");
MODULE_AUTHOR("jun.li@nxp.com");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("DesignWare USB3 imx8mp Glue Layer");
Commit	Line	Data
6dd25659	1	// SPDX-License-Identifier: GPL-2.0
ed577c32	2	/*
6dd25659 LJ	3	* dwc3-imx8mp.c - NXP imx8mp Specific Glue layer
	4	*
	5	* Copyright (c) 2020 NXP.
	6	*/
	7
	8	#include <linux/clk.h>
	9	#include <linux/interrupt.h>
	10	#include <linux/io.h>
	11	#include <linux/kernel.h>
	12	#include <linux/module.h>
	13	#include <linux/of_platform.h>
	14	#include <linux/platform_device.h>
	15	#include <linux/pm_runtime.h>
	16
	17	#include "core.h"
	18
	19	/* USB wakeup registers */
	20	#define USB_WAKEUP_CTRL 0x00
	21
	22	/* Global wakeup interrupt enable, also used to clear interrupt */
	23	#define USB_WAKEUP_EN BIT(31)
	24	/* Wakeup from connect or disconnect, only for superspeed */
	25	#define USB_WAKEUP_SS_CONN BIT(5)
	26	/* 0 select vbus_valid, 1 select sessvld */
	27	#define USB_WAKEUP_VBUS_SRC_SESS_VAL BIT(4)
	28	/* Enable signal for wake up from u3 state */
	29	#define USB_WAKEUP_U3_EN BIT(3)
	30	/* Enable signal for wake up from id change */
	31	#define USB_WAKEUP_ID_EN BIT(2)
	32	/* Enable signal for wake up from vbus change */
	33	#define USB_WAKEUP_VBUS_EN BIT(1)
	34	/* Enable signal for wake up from dp/dm change */
	35	#define USB_WAKEUP_DPDM_EN BIT(0)
	36
	37	#define USB_WAKEUP_EN_MASK GENMASK(5, 0)
	38
	39	struct dwc3_imx8mp {
	40	struct device *dev;
	41	struct platform_device *dwc3;
	42	void __iomem *glue_base;
	43	struct clk *hsio_clk;
	44	struct clk *suspend_clk;
	45	int irq;
	46	bool pm_suspended;
	47	bool wakeup_pending;
	48	};
	49
	50	static void dwc3_imx8mp_wakeup_enable(struct dwc3_imx8mp *dwc3_imx)
	51	{
	52	struct dwc3 *dwc3 = platform_get_drvdata(dwc3_imx->dwc3);
	53	u32 val;
	54
	55	if (!dwc3)
	56	return;
	57
	58	val = readl(dwc3_imx->glue_base + USB_WAKEUP_CTRL);
	59
	60	if ((dwc3->current_dr_role == DWC3_GCTL_PRTCAP_HOST) && dwc3->xhci)
	61	val \|= USB_WAKEUP_EN \| USB_WAKEUP_SS_CONN \|
	62	USB_WAKEUP_U3_EN \| USB_WAKEUP_DPDM_EN;
	63	else if (dwc3->current_dr_role == DWC3_GCTL_PRTCAP_DEVICE)
	64	val \|= USB_WAKEUP_EN \| USB_WAKEUP_VBUS_EN \|
	65	USB_WAKEUP_VBUS_SRC_SESS_VAL;
	66
67	writel(val, dwc3_imx->glue_base + USB_WAKEUP_CTRL);
68	}
69
70	static void dwc3_imx8mp_wakeup_disable(struct dwc3_imx8mp *dwc3_imx)
71	{
72	u32 val;
73
74	val = readl(dwc3_imx->glue_base + USB_WAKEUP_CTRL);
75	val &= ~(USB_WAKEUP_EN \| USB_WAKEUP_EN_MASK);
76	writel(val, dwc3_imx->glue_base + USB_WAKEUP_CTRL);
77	}
78
79	static irqreturn_t dwc3_imx8mp_interrupt(int irq, void *_dwc3_imx)
80	{
81	struct dwc3_imx8mp *dwc3_imx = _dwc3_imx;
82	struct dwc3 *dwc = platform_get_drvdata(dwc3_imx->dwc3);
83
84	if (!dwc3_imx->pm_suspended)
85	return IRQ_HANDLED;
86
87	disable_irq_nosync(dwc3_imx->irq);
88	dwc3_imx->wakeup_pending = true;
89
90	if ((dwc->current_dr_role == DWC3_GCTL_PRTCAP_HOST) && dwc->xhci)
91	pm_runtime_resume(&dwc->xhci->dev);
92	else if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_DEVICE)
93	pm_runtime_get(dwc->dev);
94
95	return IRQ_HANDLED;
96	}
97
98	static int dwc3_imx8mp_probe(struct platform_device *pdev)
99	{
100	struct device *dev = &pdev->dev;
101	struct device_node dwc3_np, node = dev->of_node;
102	struct dwc3_imx8mp *dwc3_imx;
103	int err, irq;
104
105	if (!node) {
106	dev_err(dev, "device node not found\n");
107	return -EINVAL;
108	}
109
110	dwc3_imx = devm_kzalloc(dev, sizeof(*dwc3_imx), GFP_KERNEL);
111	if (!dwc3_imx)
112	return -ENOMEM;
113
114	platform_set_drvdata(pdev, dwc3_imx);
115
116	dwc3_imx->dev = dev;
117
118	dwc3_imx->glue_base = devm_platform_ioremap_resource(pdev, 0);
119	if (IS_ERR(dwc3_imx->glue_base))
120	return PTR_ERR(dwc3_imx->glue_base);
121
122	dwc3_imx->hsio_clk = devm_clk_get(dev, "hsio");
123	if (IS_ERR(dwc3_imx->hsio_clk)) {
124	err = PTR_ERR(dwc3_imx->hsio_clk);
125	dev_err(dev, "Failed to get hsio clk, err=%d\n", err);
126	return err;
127	}
128
129	err = clk_prepare_enable(dwc3_imx->hsio_clk);
130	if (err) {
131	dev_err(dev, "Failed to enable hsio clk, err=%d\n", err);
132	return err;
133	}
134
135	dwc3_imx->suspend_clk = devm_clk_get(dev, "suspend");
136	if (IS_ERR(dwc3_imx->suspend_clk)) {
137	err = PTR_ERR(dwc3_imx->suspend_clk);
138	dev_err(dev, "Failed to get suspend clk, err=%d\n", err);
139	goto disable_hsio_clk;
140	}
141
142	err = clk_prepare_enable(dwc3_imx->suspend_clk);
143	if (err) {
144	dev_err(dev, "Failed to enable suspend clk, err=%d\n", err);
145	goto disable_hsio_clk;
146	}
147
148	irq = platform_get_irq(pdev, 0);
149	if (irq < 0) {
150	err = irq;
151	goto disable_clks;
152	}
153	dwc3_imx->irq = irq;
154
6dd25659 LJ	155	pm_runtime_set_active(dev);
	156	pm_runtime_enable(dev);
	157	err = pm_runtime_get_sync(dev);
	158	if (err < 0)
	159	goto disable_rpm;
	160
b9699208	161	dwc3_np = of_get_compatible_child(node, "snps,dwc3");
6dd25659	162	if (!dwc3_np) {
0b2b149e	163	err = -ENODEV;
6dd25659 LJ	164	dev_err(dev, "failed to find dwc3 core child\n");
	165	goto disable_rpm;
	166	}
	167
	168	err = of_platform_populate(node, NULL, NULL, dev);
	169	if (err) {
	170	dev_err(&pdev->dev, "failed to create dwc3 core\n");
	171	goto err_node_put;
	172	}
	173
	174	dwc3_imx->dwc3 = of_find_device_by_node(dwc3_np);
	175	if (!dwc3_imx->dwc3) {
	176	dev_err(dev, "failed to get dwc3 platform device\n");
	177	err = -ENODEV;
	178	goto depopulate;
	179	}
	180	of_node_put(dwc3_np);
	181
6a48d0ae NL	182	err = devm_request_threaded_irq(dev, irq, NULL, dwc3_imx8mp_interrupt,
	183	IRQF_ONESHOT, dev_name(dev), dwc3_imx);
	184	if (err) {
	185	dev_err(dev, "failed to request IRQ #%d --> %d\n", irq, err);
	186	goto depopulate;
	187	}
	188
6dd25659 LJ	189	device_set_wakeup_capable(dev, true);
	190	pm_runtime_put(dev);
	191
	192	return 0;
	193
	194	depopulate:
	195	of_platform_depopulate(dev);
	196	err_node_put:
	197	of_node_put(dwc3_np);
	198	disable_rpm:
	199	pm_runtime_disable(dev);
	200	pm_runtime_put_noidle(dev);
	201	disable_clks:
	202	clk_disable_unprepare(dwc3_imx->suspend_clk);
	203	disable_hsio_clk:
	204	clk_disable_unprepare(dwc3_imx->hsio_clk);
	205
	206	return err;
	207	}
	208
	209	static int dwc3_imx8mp_remove(struct platform_device *pdev)
	210	{
	211	struct dwc3_imx8mp *dwc3_imx = platform_get_drvdata(pdev);
	212	struct device *dev = &pdev->dev;
	213
	214	pm_runtime_get_sync(dev);
	215	of_platform_depopulate(dev);
	216
	217	clk_disable_unprepare(dwc3_imx->suspend_clk);
	218	clk_disable_unprepare(dwc3_imx->hsio_clk);
	219
	220	pm_runtime_disable(dev);
	221	pm_runtime_put_noidle(dev);
	222	platform_set_drvdata(pdev, NULL);
	223
	224	return 0;
	225	}
	226
	227	static int __maybe_unused dwc3_imx8mp_suspend(struct dwc3_imx8mp *dwc3_imx,
	228	pm_message_t msg)
	229	{
	230	if (dwc3_imx->pm_suspended)
	231	return 0;
	232
	233	/* Wakeup enable */
	234	if (PMSG_IS_AUTO(msg) \|\| device_may_wakeup(dwc3_imx->dev))
	235	dwc3_imx8mp_wakeup_enable(dwc3_imx);
	236
	237	dwc3_imx->pm_suspended = true;
	238
	239	return 0;
	240	}
	241
	242	static int __maybe_unused dwc3_imx8mp_resume(struct dwc3_imx8mp *dwc3_imx,
	243	pm_message_t msg)
	244	{
	245	struct dwc3 *dwc = platform_get_drvdata(dwc3_imx->dwc3);
	246	int ret = 0;
	247
	248	if (!dwc3_imx->pm_suspended)
	249	return 0;
	250
	251	/* Wakeup disable */
	252	dwc3_imx8mp_wakeup_disable(dwc3_imx);
253	dwc3_imx->pm_suspended = false;
254
255	if (dwc3_imx->wakeup_pending) {
256	dwc3_imx->wakeup_pending = false;
257	if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_DEVICE) {
258	pm_runtime_mark_last_busy(dwc->dev);
259	pm_runtime_put_autosuspend(dwc->dev);
260	} else {
261	/*
262	* Add wait for xhci switch from suspend
263	* clock to normal clock to detect connection.
264	*/
265	usleep_range(9000, 10000);
266	}
267	enable_irq(dwc3_imx->irq);
268	}
269
270	return ret;
271	}
272
273	static int __maybe_unused dwc3_imx8mp_pm_suspend(struct device *dev)
274	{
275	struct dwc3_imx8mp *dwc3_imx = dev_get_drvdata(dev);
276	int ret;
277
278	ret = dwc3_imx8mp_suspend(dwc3_imx, PMSG_SUSPEND);
279
280	if (device_may_wakeup(dwc3_imx->dev))
281	enable_irq_wake(dwc3_imx->irq);
282	else
283	clk_disable_unprepare(dwc3_imx->suspend_clk);
284
285	clk_disable_unprepare(dwc3_imx->hsio_clk);
286	dev_dbg(dev, "dwc3 imx8mp pm suspend.\n");
287
288	return ret;
289	}
290
291	static int __maybe_unused dwc3_imx8mp_pm_resume(struct device *dev)
292	{
293	struct dwc3_imx8mp *dwc3_imx = dev_get_drvdata(dev);
294	int ret;
295
296	if (device_may_wakeup(dwc3_imx->dev)) {
297	disable_irq_wake(dwc3_imx->irq);
298	} else {
299	ret = clk_prepare_enable(dwc3_imx->suspend_clk);
300	if (ret)
301	return ret;
302	}
303
304	ret = clk_prepare_enable(dwc3_imx->hsio_clk);
305	if (ret)
306	return ret;
307
308	ret = dwc3_imx8mp_resume(dwc3_imx, PMSG_RESUME);
309
310	pm_runtime_disable(dev);
311	pm_runtime_set_active(dev);
312	pm_runtime_enable(dev);
313
314	dev_dbg(dev, "dwc3 imx8mp pm resume.\n");
315
316	return ret;
317	}
318
319	static int __maybe_unused dwc3_imx8mp_runtime_suspend(struct device *dev)
320	{
321	struct dwc3_imx8mp *dwc3_imx = dev_get_drvdata(dev);
322
323	dev_dbg(dev, "dwc3 imx8mp runtime suspend.\n");
324
325	return dwc3_imx8mp_suspend(dwc3_imx, PMSG_AUTO_SUSPEND);
326	}
327
328	static int __maybe_unused dwc3_imx8mp_runtime_resume(struct device *dev)
329	{
330	struct dwc3_imx8mp *dwc3_imx = dev_get_drvdata(dev);
331
332	dev_dbg(dev, "dwc3 imx8mp runtime resume.\n");
333
334	return dwc3_imx8mp_resume(dwc3_imx, PMSG_AUTO_RESUME);
335	}
336
337	static const struct dev_pm_ops dwc3_imx8mp_dev_pm_ops = {
338	SET_SYSTEM_SLEEP_PM_OPS(dwc3_imx8mp_pm_suspend, dwc3_imx8mp_pm_resume)
339	SET_RUNTIME_PM_OPS(dwc3_imx8mp_runtime_suspend,
340	dwc3_imx8mp_runtime_resume, NULL)
341	};
342
343	static const struct of_device_id dwc3_imx8mp_of_match[] = {
344	{ .compatible = "fsl,imx8mp-dwc3", },
345	{},
346	};
347	MODULE_DEVICE_TABLE(of, dwc3_imx8mp_of_match);
348
349	static struct platform_driver dwc3_imx8mp_driver = {
350	.probe = dwc3_imx8mp_probe,
351	.remove = dwc3_imx8mp_remove,
352	.driver = {
353	.name = "imx8mp-dwc3",
354	.pm = &dwc3_imx8mp_dev_pm_ops,
355	.of_match_table = dwc3_imx8mp_of_match,
356	},
357	};
358
359	module_platform_driver(dwc3_imx8mp_driver);
360
361	MODULE_ALIAS("platform:imx8mp-dwc3");
362	MODULE_AUTHOR("jun.li@nxp.com");
363	MODULE_LICENSE("GPL v2");
364	MODULE_DESCRIPTION("DesignWare USB3 imx8mp Glue Layer");