drivers/usb/chipidea/ci_hdrc_imx.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2012 Freescale Semiconductor, Inc.
  * Copyright (C) 2012 Marek Vasut <marex@denx.de>
  * on behalf of DENX Software Engineering GmbH
  */

 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/usb/chipidea.h>
 #include <linux/usb/of.h>
 #include <linux/clk.h>
 #include <linux/pinctrl/consumer.h>
 #include <linux/pm_qos.h>

 #include "ci.h"
 #include "ci_hdrc_imx.h"

 struct ci_hdrc_imx_platform_flag {
 	unsigned int flags;
 };

 static const struct ci_hdrc_imx_platform_flag imx23_usb_data = {
 	.flags = CI_HDRC_TURN_VBUS_EARLY_ON |
 		CI_HDRC_DISABLE_STREAMING,
 };

 static const struct ci_hdrc_imx_platform_flag imx27_usb_data = {
 	.flags = CI_HDRC_DISABLE_STREAMING,
 };

 static const struct ci_hdrc_imx_platform_flag imx28_usb_data = {
 	.flags = CI_HDRC_IMX28_WRITE_FIX |
 		CI_HDRC_TURN_VBUS_EARLY_ON |
 		CI_HDRC_DISABLE_STREAMING,
 };

 static const struct ci_hdrc_imx_platform_flag imx6q_usb_data = {
 	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
 		CI_HDRC_TURN_VBUS_EARLY_ON |
 		CI_HDRC_DISABLE_STREAMING,
 };

 static const struct ci_hdrc_imx_platform_flag imx6sl_usb_data = {
 	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
 		CI_HDRC_TURN_VBUS_EARLY_ON |
 		CI_HDRC_DISABLE_HOST_STREAMING,
 };

 static const struct ci_hdrc_imx_platform_flag imx6sx_usb_data = {
 	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
 		CI_HDRC_TURN_VBUS_EARLY_ON |
 		CI_HDRC_DISABLE_HOST_STREAMING,
 };

 static const struct ci_hdrc_imx_platform_flag imx6ul_usb_data = {
 	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
 		CI_HDRC_TURN_VBUS_EARLY_ON |
 		CI_HDRC_DISABLE_DEVICE_STREAMING,
 };

 static const struct ci_hdrc_imx_platform_flag imx7d_usb_data = {
 	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM,
 };

 static const struct ci_hdrc_imx_platform_flag imx7ulp_usb_data = {
 	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
 		CI_HDRC_HAS_PORTSC_PEC_MISSED |
 		CI_HDRC_PMQOS,
 };

 static const struct ci_hdrc_imx_platform_flag imx8ulp_usb_data = {
 	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
 		CI_HDRC_HAS_PORTSC_PEC_MISSED,
 };

 static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
 	{ .compatible = "fsl,imx23-usb", .data = &imx23_usb_data},
 	{ .compatible = "fsl,imx28-usb", .data = &imx28_usb_data},
 	{ .compatible = "fsl,imx27-usb", .data = &imx27_usb_data},
 	{ .compatible = "fsl,imx6q-usb", .data = &imx6q_usb_data},
 	{ .compatible = "fsl,imx6sl-usb", .data = &imx6sl_usb_data},
 	{ .compatible = "fsl,imx6sx-usb", .data = &imx6sx_usb_data},
 	{ .compatible = "fsl,imx6ul-usb", .data = &imx6ul_usb_data},
 	{ .compatible = "fsl,imx7d-usb", .data = &imx7d_usb_data},
 	{ .compatible = "fsl,imx7ulp-usb", .data = &imx7ulp_usb_data},
 	{ .compatible = "fsl,imx8ulp-usb", .data = &imx8ulp_usb_data},
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);

 struct ci_hdrc_imx_data {
 	struct usb_phy *phy;
 	struct platform_device *ci_pdev;
 	struct clk *clk;
 	struct clk *clk_wakeup;
 	struct imx_usbmisc_data *usbmisc_data;
 	bool supports_runtime_pm;
 	bool override_phy_control;
 	bool in_lpm;
 	struct pinctrl *pinctrl;
 	struct pinctrl_state *pinctrl_hsic_active;
 	struct regulator *hsic_pad_regulator;
 	/* SoC before i.mx6 (except imx23/imx28) needs three clks */
 	bool need_three_clks;
 	struct clk *clk_ipg;
 	struct clk *clk_ahb;
 	struct clk *clk_per;
 	/* --------------------------------- */
 	struct pm_qos_request pm_qos_req;
 	const struct ci_hdrc_imx_platform_flag *plat_data;
 };

 /* Common functions shared by usbmisc drivers */

 static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
 {
 	struct platform_device *misc_pdev;
 	struct device_node *np = dev->of_node;
 	struct of_phandle_args args;
 	struct imx_usbmisc_data *data;
 	int ret;

 	/*
 	 * In case the fsl,usbmisc property is not present this device doesn't
 	 * need usbmisc. Return NULL (which is no error here)
 	 */
 	if (!of_get_property(np, "fsl,usbmisc", NULL))
 		return NULL;

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

 	ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells",
 					0, &args);
 	if (ret) {
 		dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n",
 			ret);
 		return ERR_PTR(ret);
 	}

 	data->index = args.args[0];

 	misc_pdev = of_find_device_by_node(args.np);
 	of_node_put(args.np);

 	if (!misc_pdev)
 		return ERR_PTR(-EPROBE_DEFER);

 	if (!platform_get_drvdata(misc_pdev)) {
 		put_device(&misc_pdev->dev);
 		return ERR_PTR(-EPROBE_DEFER);
 	}
 	data->dev = &misc_pdev->dev;

 	/*
 	 * Check the various over current related properties. If over current
 	 * detection is disabled we're not interested in the polarity.
 	 */
 	if (of_property_read_bool(np, "disable-over-current")) {
 		data->disable_oc = 1;
 	} else if (of_property_read_bool(np, "over-current-active-high")) {
 		data->oc_pol_active_low = 0;
 		data->oc_pol_configured = 1;
 	} else if (of_property_read_bool(np, "over-current-active-low")) {
 		data->oc_pol_active_low = 1;
 		data->oc_pol_configured = 1;
 	} else {
 		dev_warn(dev, "No over current polarity defined\n");
 	}

 	data->pwr_pol = of_property_read_bool(np, "power-active-high");
 	data->evdo = of_property_read_bool(np, "external-vbus-divider");

 	if (of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI)
 		data->ulpi = 1;

 	if (of_property_read_u32(np, "samsung,picophy-pre-emp-curr-control",
 			&data->emp_curr_control))
 		data->emp_curr_control = -1;
 	if (of_property_read_u32(np, "samsung,picophy-dc-vol-level-adjust",
 			&data->dc_vol_level_adjust))
 		data->dc_vol_level_adjust = -1;
 	if (of_property_read_u32(np, "fsl,picophy-rise-fall-time-adjust",
 			&data->rise_fall_time_adjust))
 		data->rise_fall_time_adjust = -1;

 	return data;
 }

 /* End of common functions shared by usbmisc drivers*/
 static int imx_get_clks(struct device *dev)
 {
 	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 	int ret = 0;

 	data->clk_ipg = devm_clk_get(dev, "ipg");
 	if (IS_ERR(data->clk_ipg)) {
 		/* If the platform only needs one primary clock */
 		data->clk = devm_clk_get(dev, NULL);
 		if (IS_ERR(data->clk)) {
 			ret = PTR_ERR(data->clk);
 			dev_err(dev,
 				"Failed to get clks, err=%ld,%ld\n",
 				PTR_ERR(data->clk), PTR_ERR(data->clk_ipg));
 			return ret;
 		}
 		/* Get wakeup clock. Not all of the platforms need to
 		 * handle this clock. So make it optional.
 		 */
 		data->clk_wakeup = devm_clk_get_optional(dev, "usb_wakeup_clk");
 		if (IS_ERR(data->clk_wakeup))
 			ret = dev_err_probe(dev, PTR_ERR(data->clk_wakeup),
 					"Failed to get wakeup clk\n");
 		return ret;
 	}

 	data->clk_ahb = devm_clk_get(dev, "ahb");
 	if (IS_ERR(data->clk_ahb)) {
 		ret = PTR_ERR(data->clk_ahb);
 		dev_err(dev,
 			"Failed to get ahb clock, err=%d\n", ret);
 		return ret;
 	}

 	data->clk_per = devm_clk_get(dev, "per");
 	if (IS_ERR(data->clk_per)) {
 		ret = PTR_ERR(data->clk_per);
 		dev_err(dev,
 			"Failed to get per clock, err=%d\n", ret);
 		return ret;
 	}

 	data->need_three_clks = true;
 	return ret;
 }

 static int imx_prepare_enable_clks(struct device *dev)
 {
 	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 	int ret = 0;

 	if (data->need_three_clks) {
 		ret = clk_prepare_enable(data->clk_ipg);
 		if (ret) {
 			dev_err(dev,
 				"Failed to prepare/enable ipg clk, err=%d\n",
 				ret);
 			return ret;
 		}

 		ret = clk_prepare_enable(data->clk_ahb);
 		if (ret) {
 			dev_err(dev,
 				"Failed to prepare/enable ahb clk, err=%d\n",
 				ret);
 			clk_disable_unprepare(data->clk_ipg);
 			return ret;
 		}

 		ret = clk_prepare_enable(data->clk_per);
 		if (ret) {
 			dev_err(dev,
 				"Failed to prepare/enable per clk, err=%d\n",
 				ret);
 			clk_disable_unprepare(data->clk_ahb);
 			clk_disable_unprepare(data->clk_ipg);
 			return ret;
 		}
 	} else {
 		ret = clk_prepare_enable(data->clk);
 		if (ret) {
 			dev_err(dev,
 				"Failed to prepare/enable clk, err=%d\n",
 				ret);
 			return ret;
 		}
 	}

 	return ret;
 }

 static void imx_disable_unprepare_clks(struct device *dev)
 {
 	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);

 	if (data->need_three_clks) {
 		clk_disable_unprepare(data->clk_per);
 		clk_disable_unprepare(data->clk_ahb);
 		clk_disable_unprepare(data->clk_ipg);
 	} else {
 		clk_disable_unprepare(data->clk);
 	}
 }

 static int ci_hdrc_imx_notify_event(struct ci_hdrc *ci, unsigned int event)
 {
 	struct device *dev = ci->dev->parent;
 	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 	int ret = 0;
 	struct imx_usbmisc_data *mdata = data->usbmisc_data;

 	switch (event) {
 	case CI_HDRC_IMX_HSIC_ACTIVE_EVENT:
 		if (data->pinctrl) {
 			ret = pinctrl_select_state(data->pinctrl,
 					data->pinctrl_hsic_active);
 			if (ret)
 				dev_err(dev,
 					"hsic_active select failed, err=%d\n",
 					ret);
 		}
 		break;
 	case CI_HDRC_IMX_HSIC_SUSPEND_EVENT:
 		ret = imx_usbmisc_hsic_set_connect(mdata);
 		if (ret)
 			dev_err(dev,
 				"hsic_set_connect failed, err=%d\n", ret);
 		break;
 	case CI_HDRC_CONTROLLER_VBUS_EVENT:
 		if (ci->vbus_active)
 			ret = imx_usbmisc_charger_detection(mdata, true);
 		else
 			ret = imx_usbmisc_charger_detection(mdata, false);
 		if (ci->usb_phy)
 			schedule_work(&ci->usb_phy->chg_work);
 		break;
 	default:
 		break;
 	}

 	return ret;
 }

 static int ci_hdrc_imx_probe(struct platform_device *pdev)
 {
 	struct ci_hdrc_imx_data *data;
 	struct ci_hdrc_platform_data pdata = {
 		.name		= dev_name(&pdev->dev),
 		.capoffset	= DEF_CAPOFFSET,
 		.notify_event	= ci_hdrc_imx_notify_event,
 	};
 	int ret;
 	const struct ci_hdrc_imx_platform_flag *imx_platform_flag;
 	struct device_node *np = pdev->dev.of_node;
 	struct device *dev = &pdev->dev;

 	imx_platform_flag = of_device_get_match_data(&pdev->dev);

 	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
 	if (!data)
 		return -ENOMEM;

 	data->plat_data = imx_platform_flag;
 	pdata.flags |= imx_platform_flag->flags;
 	platform_set_drvdata(pdev, data);
 	data->usbmisc_data = usbmisc_get_init_data(dev);
 	if (IS_ERR(data->usbmisc_data))
 		return PTR_ERR(data->usbmisc_data);

 	if ((of_usb_get_phy_mode(dev->of_node) == USBPHY_INTERFACE_MODE_HSIC)
 		&& data->usbmisc_data) {
 		pdata.flags |= CI_HDRC_IMX_IS_HSIC;
 		data->usbmisc_data->hsic = 1;
 		data->pinctrl = devm_pinctrl_get(dev);
 		if (PTR_ERR(data->pinctrl) == -ENODEV)
 			data->pinctrl = NULL;
 		else if (IS_ERR(data->pinctrl))
 			return dev_err_probe(dev, PTR_ERR(data->pinctrl),
 					     "pinctrl get failed\n");

 		data->hsic_pad_regulator =
 				devm_regulator_get_optional(dev, "hsic");
 		if (PTR_ERR(data->hsic_pad_regulator) == -ENODEV) {
 			/* no pad regulator is needed */
 			data->hsic_pad_regulator = NULL;
 		} else if (IS_ERR(data->hsic_pad_regulator))
 			return dev_err_probe(dev, PTR_ERR(data->hsic_pad_regulator),
 					     "Get HSIC pad regulator error\n");

 		if (data->hsic_pad_regulator) {
 			ret = regulator_enable(data->hsic_pad_regulator);
 			if (ret) {
 				dev_err(dev,
 					"Failed to enable HSIC pad regulator\n");
 				return ret;
 			}
 		}
 	}

 	/* HSIC pinctrl handling */
 	if (data->pinctrl) {
 		struct pinctrl_state *pinctrl_hsic_idle;

 		pinctrl_hsic_idle = pinctrl_lookup_state(data->pinctrl, "idle");
 		if (IS_ERR(pinctrl_hsic_idle)) {
 			dev_err(dev,
 				"pinctrl_hsic_idle lookup failed, err=%ld\n",
 					PTR_ERR(pinctrl_hsic_idle));
 			return PTR_ERR(pinctrl_hsic_idle);
 		}

 		ret = pinctrl_select_state(data->pinctrl, pinctrl_hsic_idle);
 		if (ret) {
 			dev_err(dev, "hsic_idle select failed, err=%d\n", ret);
 			return ret;
 		}

 		data->pinctrl_hsic_active = pinctrl_lookup_state(data->pinctrl,
 								"active");
 		if (IS_ERR(data->pinctrl_hsic_active)) {
 			dev_err(dev,
 				"pinctrl_hsic_active lookup failed, err=%ld\n",
 					PTR_ERR(data->pinctrl_hsic_active));
 			return PTR_ERR(data->pinctrl_hsic_active);
 		}
 	}

 	if (pdata.flags & CI_HDRC_PMQOS)
 		cpu_latency_qos_add_request(&data->pm_qos_req, 0);

 	ret = imx_get_clks(dev);
 	if (ret)
 		goto disable_hsic_regulator;

 	ret = imx_prepare_enable_clks(dev);
 	if (ret)
 		goto disable_hsic_regulator;

 	ret = clk_prepare_enable(data->clk_wakeup);
 	if (ret)
 		goto err_wakeup_clk;

 	data->phy = devm_usb_get_phy_by_phandle(dev, "fsl,usbphy", 0);
 	if (IS_ERR(data->phy)) {
 		ret = PTR_ERR(data->phy);
 		if (ret != -ENODEV) {
 			dev_err_probe(dev, ret, "Failed to parse fsl,usbphy\n");
 			goto err_clk;
 		}
 		data->phy = devm_usb_get_phy_by_phandle(dev, "phys", 0);
 		if (IS_ERR(data->phy)) {
 			ret = PTR_ERR(data->phy);
 			if (ret == -ENODEV) {
 				data->phy = NULL;
 			} else {
 				dev_err_probe(dev, ret, "Failed to parse phys\n");
 				goto err_clk;
 			}
 		}
 	}

 	pdata.usb_phy = data->phy;
 	if (data->usbmisc_data)
 		data->usbmisc_data->usb_phy = data->phy;

 	if ((of_device_is_compatible(np, "fsl,imx53-usb") ||
 	     of_device_is_compatible(np, "fsl,imx51-usb")) && pdata.usb_phy &&
 	    of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI) {
 		pdata.flags |= CI_HDRC_OVERRIDE_PHY_CONTROL;
 		data->override_phy_control = true;
 		usb_phy_init(pdata.usb_phy);
 	}

 	if (pdata.flags & CI_HDRC_SUPPORTS_RUNTIME_PM)
 		data->supports_runtime_pm = true;

 	ret = imx_usbmisc_init(data->usbmisc_data);
 	if (ret) {
 		dev_err(dev, "usbmisc init failed, ret=%d\n", ret);
 		goto err_clk;
 	}

 	data->ci_pdev = ci_hdrc_add_device(dev,
 				pdev->resource, pdev->num_resources,
 				&pdata);
 	if (IS_ERR(data->ci_pdev)) {
 		ret = PTR_ERR(data->ci_pdev);
 		dev_err_probe(dev, ret, "ci_hdrc_add_device failed\n");
 		goto err_clk;
 	}

 	if (data->usbmisc_data) {
 		if (!IS_ERR(pdata.id_extcon.edev) ||
 		    of_property_read_bool(np, "usb-role-switch"))
 			data->usbmisc_data->ext_id = 1;

 		if (!IS_ERR(pdata.vbus_extcon.edev) ||
 		    of_property_read_bool(np, "usb-role-switch"))
 			data->usbmisc_data->ext_vbus = 1;

 		/* usbmisc needs to know dr mode to choose wakeup setting */
 		data->usbmisc_data->available_role =
 			ci_hdrc_query_available_role(data->ci_pdev);
 	}

 	ret = imx_usbmisc_init_post(data->usbmisc_data);
 	if (ret) {
 		dev_err(dev, "usbmisc post failed, ret=%d\n", ret);
 		goto disable_device;
 	}

 	if (data->supports_runtime_pm) {
 		pm_runtime_set_active(dev);
 		pm_runtime_enable(dev);
 	}

 	device_set_wakeup_capable(dev, true);

 	return 0;

 disable_device:
 	ci_hdrc_remove_device(data->ci_pdev);
 err_clk:
 	clk_disable_unprepare(data->clk_wakeup);
 err_wakeup_clk:
 	imx_disable_unprepare_clks(dev);
 disable_hsic_regulator:
 	if (data->hsic_pad_regulator)
 		/* don't overwrite original ret (cf. EPROBE_DEFER) */
 		regulator_disable(data->hsic_pad_regulator);
 	if (pdata.flags & CI_HDRC_PMQOS)
 		cpu_latency_qos_remove_request(&data->pm_qos_req);
 	data->ci_pdev = NULL;
 	return ret;
 }

 static void ci_hdrc_imx_remove(struct platform_device *pdev)
 {
 	struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);

 	if (data->supports_runtime_pm) {
 		pm_runtime_get_sync(&pdev->dev);
 		pm_runtime_disable(&pdev->dev);
 		pm_runtime_put_noidle(&pdev->dev);
 	}
 	if (data->ci_pdev)
 		ci_hdrc_remove_device(data->ci_pdev);
 	if (data->override_phy_control)
 		usb_phy_shutdown(data->phy);
 	if (data->ci_pdev) {
 		imx_disable_unprepare_clks(&pdev->dev);
 		clk_disable_unprepare(data->clk_wakeup);
 		if (data->plat_data->flags & CI_HDRC_PMQOS)
 			cpu_latency_qos_remove_request(&data->pm_qos_req);
 		if (data->hsic_pad_regulator)
 			regulator_disable(data->hsic_pad_regulator);
 	}
 }

 static void ci_hdrc_imx_shutdown(struct platform_device *pdev)
 {
 	ci_hdrc_imx_remove(pdev);
 }

 static int __maybe_unused imx_controller_suspend(struct device *dev,
 						 pm_message_t msg)
 {
 	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 	int ret = 0;

 	dev_dbg(dev, "at %s\n", __func__);

 	ret = imx_usbmisc_suspend(data->usbmisc_data,
 				  PMSG_IS_AUTO(msg) || device_may_wakeup(dev));
 	if (ret) {
 		dev_err(dev,
 			"usbmisc suspend failed, ret=%d\n", ret);
 		return ret;
 	}

 	imx_disable_unprepare_clks(dev);
 	if (data->plat_data->flags & CI_HDRC_PMQOS)
 		cpu_latency_qos_remove_request(&data->pm_qos_req);

 	data->in_lpm = true;

 	return 0;
 }

 static int __maybe_unused imx_controller_resume(struct device *dev,
 						pm_message_t msg)
 {
 	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 	int ret = 0;

 	dev_dbg(dev, "at %s\n", __func__);

 	if (!data->in_lpm) {
 		WARN_ON(1);
 		return 0;
 	}

 	if (data->plat_data->flags & CI_HDRC_PMQOS)
 		cpu_latency_qos_add_request(&data->pm_qos_req, 0);

 	ret = imx_prepare_enable_clks(dev);
 	if (ret)
 		return ret;

 	data->in_lpm = false;

 	ret = imx_usbmisc_resume(data->usbmisc_data,
 				 PMSG_IS_AUTO(msg) || device_may_wakeup(dev));
 	if (ret) {
 		dev_err(dev, "usbmisc resume failed, ret=%d\n", ret);
 		goto clk_disable;
 	}

 	return 0;

 clk_disable:
 	imx_disable_unprepare_clks(dev);
 	return ret;
 }

 static int __maybe_unused ci_hdrc_imx_suspend(struct device *dev)
 {
 	int ret;

 	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);

 	if (data->in_lpm)
 		/* The core's suspend doesn't run */
 		return 0;

 	ret = imx_controller_suspend(dev, PMSG_SUSPEND);
 	if (ret)
 		return ret;

 	pinctrl_pm_select_sleep_state(dev);
 	return ret;
 }

 static int __maybe_unused ci_hdrc_imx_resume(struct device *dev)
 {
 	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 	int ret;

 	pinctrl_pm_select_default_state(dev);
 	ret = imx_controller_resume(dev, PMSG_RESUME);
 	if (!ret && data->supports_runtime_pm) {
 		pm_runtime_disable(dev);
 		pm_runtime_set_active(dev);
 		pm_runtime_enable(dev);
 	}

 	return ret;
 }

 static int __maybe_unused ci_hdrc_imx_runtime_suspend(struct device *dev)
 {
 	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);

 	if (data->in_lpm) {
 		WARN_ON(1);
 		return 0;
 	}

 	return imx_controller_suspend(dev, PMSG_AUTO_SUSPEND);
 }

 static int __maybe_unused ci_hdrc_imx_runtime_resume(struct device *dev)
 {
 	return imx_controller_resume(dev, PMSG_AUTO_RESUME);
 }

 static const struct dev_pm_ops ci_hdrc_imx_pm_ops = {
 	SET_SYSTEM_SLEEP_PM_OPS(ci_hdrc_imx_suspend, ci_hdrc_imx_resume)
 	SET_RUNTIME_PM_OPS(ci_hdrc_imx_runtime_suspend,
 			ci_hdrc_imx_runtime_resume, NULL)
 };
 static struct platform_driver ci_hdrc_imx_driver = {
 	.probe = ci_hdrc_imx_probe,
 	.remove_new = ci_hdrc_imx_remove,
 	.shutdown = ci_hdrc_imx_shutdown,
 	.driver = {
 		.name = "imx_usb",
 		.of_match_table = ci_hdrc_imx_dt_ids,
 		.pm = &ci_hdrc_imx_pm_ops,
 	 },
 };

 module_platform_driver(ci_hdrc_imx_driver);

 MODULE_ALIAS("platform:imx-usb");
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
 MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
 MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* Copyright 2012 Freescale Semiconductor, Inc.
	* Copyright (C) 2012 Marek Vasut <marex@denx.de>
	* on behalf of DENX Software Engineering GmbH
	*/

	#include <linux/module.h>
	#include <linux/of.h>
	#include <linux/of_platform.h>
	#include <linux/platform_device.h>
	#include <linux/pm_runtime.h>
	#include <linux/usb/chipidea.h>
	#include <linux/usb/of.h>
	#include <linux/clk.h>
	#include <linux/pinctrl/consumer.h>
	#include <linux/pm_qos.h>

	#include "ci.h"
	#include "ci_hdrc_imx.h"

	struct ci_hdrc_imx_platform_flag {
	unsigned int flags;
	};

	static const struct ci_hdrc_imx_platform_flag imx23_usb_data = {
	.flags = CI_HDRC_TURN_VBUS_EARLY_ON \|
	CI_HDRC_DISABLE_STREAMING,
	};

	static const struct ci_hdrc_imx_platform_flag imx27_usb_data = {
	.flags = CI_HDRC_DISABLE_STREAMING,
	};

	static const struct ci_hdrc_imx_platform_flag imx28_usb_data = {
	.flags = CI_HDRC_IMX28_WRITE_FIX \|
	CI_HDRC_TURN_VBUS_EARLY_ON \|
	CI_HDRC_DISABLE_STREAMING,
	};

	static const struct ci_hdrc_imx_platform_flag imx6q_usb_data = {
	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM \|
	CI_HDRC_TURN_VBUS_EARLY_ON \|
	CI_HDRC_DISABLE_STREAMING,
	};

	static const struct ci_hdrc_imx_platform_flag imx6sl_usb_data = {
	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM \|
	CI_HDRC_TURN_VBUS_EARLY_ON \|
	CI_HDRC_DISABLE_HOST_STREAMING,
	};

	static const struct ci_hdrc_imx_platform_flag imx6sx_usb_data = {
	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM \|
	CI_HDRC_TURN_VBUS_EARLY_ON \|
	CI_HDRC_DISABLE_HOST_STREAMING,
	};

	static const struct ci_hdrc_imx_platform_flag imx6ul_usb_data = {
	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM \|
	CI_HDRC_TURN_VBUS_EARLY_ON \|
	CI_HDRC_DISABLE_DEVICE_STREAMING,
	};

	static const struct ci_hdrc_imx_platform_flag imx7d_usb_data = {
	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM,
	};

	static const struct ci_hdrc_imx_platform_flag imx7ulp_usb_data = {
	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM \|
	CI_HDRC_HAS_PORTSC_PEC_MISSED \|
	CI_HDRC_PMQOS,
	};

	static const struct ci_hdrc_imx_platform_flag imx8ulp_usb_data = {
	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM \|
	CI_HDRC_HAS_PORTSC_PEC_MISSED,
	};

	static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
	{ .compatible = "fsl,imx23-usb", .data = &imx23_usb_data},
	{ .compatible = "fsl,imx28-usb", .data = &imx28_usb_data},
	{ .compatible = "fsl,imx27-usb", .data = &imx27_usb_data},
	{ .compatible = "fsl,imx6q-usb", .data = &imx6q_usb_data},
	{ .compatible = "fsl,imx6sl-usb", .data = &imx6sl_usb_data},
	{ .compatible = "fsl,imx6sx-usb", .data = &imx6sx_usb_data},
	{ .compatible = "fsl,imx6ul-usb", .data = &imx6ul_usb_data},
	{ .compatible = "fsl,imx7d-usb", .data = &imx7d_usb_data},
	{ .compatible = "fsl,imx7ulp-usb", .data = &imx7ulp_usb_data},
	{ .compatible = "fsl,imx8ulp-usb", .data = &imx8ulp_usb_data},
	{ /* sentinel */ }
	};
	MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);

	struct ci_hdrc_imx_data {
	struct usb_phy *phy;
	struct platform_device *ci_pdev;
	struct clk *clk;
	struct clk *clk_wakeup;
	struct imx_usbmisc_data *usbmisc_data;
	bool supports_runtime_pm;
	bool override_phy_control;
	bool in_lpm;
	struct pinctrl *pinctrl;
	struct pinctrl_state *pinctrl_hsic_active;
	struct regulator *hsic_pad_regulator;
	/* SoC before i.mx6 (except imx23/imx28) needs three clks */
	bool need_three_clks;
	struct clk *clk_ipg;
	struct clk *clk_ahb;
	struct clk *clk_per;
	/* --------------------------------- */
	struct pm_qos_request pm_qos_req;
	const struct ci_hdrc_imx_platform_flag *plat_data;
	};

	/* Common functions shared by usbmisc drivers */

	static struct imx_usbmisc_data usbmisc_get_init_data(struct device dev)
	{
	struct platform_device *misc_pdev;
	struct device_node *np = dev->of_node;
	struct of_phandle_args args;
	struct imx_usbmisc_data *data;
	int ret;

	/*
	* In case the fsl,usbmisc property is not present this device doesn't
	* need usbmisc. Return NULL (which is no error here)
	*/
	if (!of_get_property(np, "fsl,usbmisc", NULL))
	return NULL;

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

	ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells",
	0, &args);
	if (ret) {
	dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n",
	ret);
	return ERR_PTR(ret);
	}

	data->index = args.args[0];

	misc_pdev = of_find_device_by_node(args.np);
	of_node_put(args.np);

	if (!misc_pdev)
	return ERR_PTR(-EPROBE_DEFER);

	if (!platform_get_drvdata(misc_pdev)) {
	put_device(&misc_pdev->dev);
	return ERR_PTR(-EPROBE_DEFER);
	}
	data->dev = &misc_pdev->dev;

	/*
	* Check the various over current related properties. If over current
	* detection is disabled we're not interested in the polarity.
	*/
	if (of_property_read_bool(np, "disable-over-current")) {
	data->disable_oc = 1;
	} else if (of_property_read_bool(np, "over-current-active-high")) {
	data->oc_pol_active_low = 0;
	data->oc_pol_configured = 1;
	} else if (of_property_read_bool(np, "over-current-active-low")) {
	data->oc_pol_active_low = 1;
	data->oc_pol_configured = 1;
	} else {
	dev_warn(dev, "No over current polarity defined\n");
	}

	data->pwr_pol = of_property_read_bool(np, "power-active-high");
	data->evdo = of_property_read_bool(np, "external-vbus-divider");

	if (of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI)
	data->ulpi = 1;

	if (of_property_read_u32(np, "samsung,picophy-pre-emp-curr-control",
	&data->emp_curr_control))
	data->emp_curr_control = -1;
	if (of_property_read_u32(np, "samsung,picophy-dc-vol-level-adjust",
	&data->dc_vol_level_adjust))
	data->dc_vol_level_adjust = -1;
	if (of_property_read_u32(np, "fsl,picophy-rise-fall-time-adjust",
	&data->rise_fall_time_adjust))
	data->rise_fall_time_adjust = -1;

	return data;
	}

	/* End of common functions shared by usbmisc drivers*/
	static int imx_get_clks(struct device *dev)
	{
	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
	int ret = 0;

	data->clk_ipg = devm_clk_get(dev, "ipg");
	if (IS_ERR(data->clk_ipg)) {
	/* If the platform only needs one primary clock */
	data->clk = devm_clk_get(dev, NULL);
	if (IS_ERR(data->clk)) {
	ret = PTR_ERR(data->clk);
	dev_err(dev,
	"Failed to get clks, err=%ld,%ld\n",
	PTR_ERR(data->clk), PTR_ERR(data->clk_ipg));
	return ret;
	}
	/* Get wakeup clock. Not all of the platforms need to
	* handle this clock. So make it optional.
	*/
	data->clk_wakeup = devm_clk_get_optional(dev, "usb_wakeup_clk");
	if (IS_ERR(data->clk_wakeup))
	ret = dev_err_probe(dev, PTR_ERR(data->clk_wakeup),
	"Failed to get wakeup clk\n");
	return ret;
	}

	data->clk_ahb = devm_clk_get(dev, "ahb");
	if (IS_ERR(data->clk_ahb)) {
	ret = PTR_ERR(data->clk_ahb);
	dev_err(dev,
	"Failed to get ahb clock, err=%d\n", ret);
	return ret;
	}

	data->clk_per = devm_clk_get(dev, "per");
	if (IS_ERR(data->clk_per)) {
	ret = PTR_ERR(data->clk_per);
	dev_err(dev,
	"Failed to get per clock, err=%d\n", ret);
	return ret;
	}

	data->need_three_clks = true;
	return ret;
	}

	static int imx_prepare_enable_clks(struct device *dev)
	{
	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
	int ret = 0;

	if (data->need_three_clks) {
	ret = clk_prepare_enable(data->clk_ipg);
	if (ret) {
	dev_err(dev,
	"Failed to prepare/enable ipg clk, err=%d\n",
	ret);
	return ret;
	}

	ret = clk_prepare_enable(data->clk_ahb);
	if (ret) {
	dev_err(dev,
	"Failed to prepare/enable ahb clk, err=%d\n",
	ret);
	clk_disable_unprepare(data->clk_ipg);
	return ret;
	}

	ret = clk_prepare_enable(data->clk_per);
	if (ret) {
	dev_err(dev,
	"Failed to prepare/enable per clk, err=%d\n",
	ret);
	clk_disable_unprepare(data->clk_ahb);
	clk_disable_unprepare(data->clk_ipg);
	return ret;
	}
	} else {
	ret = clk_prepare_enable(data->clk);
	if (ret) {
	dev_err(dev,
	"Failed to prepare/enable clk, err=%d\n",
	ret);
	return ret;
	}
	}

	return ret;
	}

	static void imx_disable_unprepare_clks(struct device *dev)
	{
	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);

	if (data->need_three_clks) {
	clk_disable_unprepare(data->clk_per);
	clk_disable_unprepare(data->clk_ahb);
	clk_disable_unprepare(data->clk_ipg);
	} else {
	clk_disable_unprepare(data->clk);
	}
	}

	static int ci_hdrc_imx_notify_event(struct ci_hdrc *ci, unsigned int event)
	{
	struct device *dev = ci->dev->parent;
	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
	int ret = 0;
	struct imx_usbmisc_data *mdata = data->usbmisc_data;

	switch (event) {
	case CI_HDRC_IMX_HSIC_ACTIVE_EVENT:
	if (data->pinctrl) {
	ret = pinctrl_select_state(data->pinctrl,
	data->pinctrl_hsic_active);
	if (ret)
	dev_err(dev,
	"hsic_active select failed, err=%d\n",
	ret);
	}
	break;
	case CI_HDRC_IMX_HSIC_SUSPEND_EVENT:
	ret = imx_usbmisc_hsic_set_connect(mdata);
	if (ret)
	dev_err(dev,
	"hsic_set_connect failed, err=%d\n", ret);
	break;
	case CI_HDRC_CONTROLLER_VBUS_EVENT:
	if (ci->vbus_active)
	ret = imx_usbmisc_charger_detection(mdata, true);
	else
	ret = imx_usbmisc_charger_detection(mdata, false);
	if (ci->usb_phy)
	schedule_work(&ci->usb_phy->chg_work);
	break;
	default:
	break;
	}

	return ret;
	}

	static int ci_hdrc_imx_probe(struct platform_device *pdev)
	{
	struct ci_hdrc_imx_data *data;
	struct ci_hdrc_platform_data pdata = {
	.name = dev_name(&pdev->dev),
	.capoffset = DEF_CAPOFFSET,
	.notify_event = ci_hdrc_imx_notify_event,
	};
	int ret;
	const struct ci_hdrc_imx_platform_flag *imx_platform_flag;
	struct device_node *np = pdev->dev.of_node;
	struct device *dev = &pdev->dev;

	imx_platform_flag = of_device_get_match_data(&pdev->dev);

	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
	if (!data)
	return -ENOMEM;

	data->plat_data = imx_platform_flag;
	pdata.flags \|= imx_platform_flag->flags;
	platform_set_drvdata(pdev, data);
	data->usbmisc_data = usbmisc_get_init_data(dev);
	if (IS_ERR(data->usbmisc_data))
	return PTR_ERR(data->usbmisc_data);

	if ((of_usb_get_phy_mode(dev->of_node) == USBPHY_INTERFACE_MODE_HSIC)
	&& data->usbmisc_data) {
	pdata.flags \|= CI_HDRC_IMX_IS_HSIC;
	data->usbmisc_data->hsic = 1;
	data->pinctrl = devm_pinctrl_get(dev);
	if (PTR_ERR(data->pinctrl) == -ENODEV)
	data->pinctrl = NULL;
	else if (IS_ERR(data->pinctrl))
	return dev_err_probe(dev, PTR_ERR(data->pinctrl),
	"pinctrl get failed\n");

	data->hsic_pad_regulator =
	devm_regulator_get_optional(dev, "hsic");
	if (PTR_ERR(data->hsic_pad_regulator) == -ENODEV) {
	/* no pad regulator is needed */
	data->hsic_pad_regulator = NULL;
	} else if (IS_ERR(data->hsic_pad_regulator))
	return dev_err_probe(dev, PTR_ERR(data->hsic_pad_regulator),
	"Get HSIC pad regulator error\n");

	if (data->hsic_pad_regulator) {
	ret = regulator_enable(data->hsic_pad_regulator);
	if (ret) {
	dev_err(dev,
	"Failed to enable HSIC pad regulator\n");
	return ret;
	}
	}
	}

	/* HSIC pinctrl handling */
	if (data->pinctrl) {
	struct pinctrl_state *pinctrl_hsic_idle;

	pinctrl_hsic_idle = pinctrl_lookup_state(data->pinctrl, "idle");
	if (IS_ERR(pinctrl_hsic_idle)) {
	dev_err(dev,
	"pinctrl_hsic_idle lookup failed, err=%ld\n",
	PTR_ERR(pinctrl_hsic_idle));
	return PTR_ERR(pinctrl_hsic_idle);
	}

	ret = pinctrl_select_state(data->pinctrl, pinctrl_hsic_idle);
	if (ret) {
	dev_err(dev, "hsic_idle select failed, err=%d\n", ret);
	return ret;
	}

	data->pinctrl_hsic_active = pinctrl_lookup_state(data->pinctrl,
	"active");
	if (IS_ERR(data->pinctrl_hsic_active)) {
	dev_err(dev,
	"pinctrl_hsic_active lookup failed, err=%ld\n",
	PTR_ERR(data->pinctrl_hsic_active));
	return PTR_ERR(data->pinctrl_hsic_active);
	}
	}

	if (pdata.flags & CI_HDRC_PMQOS)
	cpu_latency_qos_add_request(&data->pm_qos_req, 0);

	ret = imx_get_clks(dev);
	if (ret)
	goto disable_hsic_regulator;

	ret = imx_prepare_enable_clks(dev);
	if (ret)
	goto disable_hsic_regulator;

	ret = clk_prepare_enable(data->clk_wakeup);
	if (ret)
	goto err_wakeup_clk;

	data->phy = devm_usb_get_phy_by_phandle(dev, "fsl,usbphy", 0);
	if (IS_ERR(data->phy)) {
	ret = PTR_ERR(data->phy);
	if (ret != -ENODEV) {
	dev_err_probe(dev, ret, "Failed to parse fsl,usbphy\n");
	goto err_clk;
	}
	data->phy = devm_usb_get_phy_by_phandle(dev, "phys", 0);
	if (IS_ERR(data->phy)) {
	ret = PTR_ERR(data->phy);
	if (ret == -ENODEV) {
	data->phy = NULL;
	} else {
	dev_err_probe(dev, ret, "Failed to parse phys\n");
	goto err_clk;
	}
	}
	}

	pdata.usb_phy = data->phy;
	if (data->usbmisc_data)
	data->usbmisc_data->usb_phy = data->phy;

	if ((of_device_is_compatible(np, "fsl,imx53-usb") \|\|
	of_device_is_compatible(np, "fsl,imx51-usb")) && pdata.usb_phy &&
	of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI) {
	pdata.flags \|= CI_HDRC_OVERRIDE_PHY_CONTROL;
	data->override_phy_control = true;
	usb_phy_init(pdata.usb_phy);
	}

	if (pdata.flags & CI_HDRC_SUPPORTS_RUNTIME_PM)
	data->supports_runtime_pm = true;

	ret = imx_usbmisc_init(data->usbmisc_data);
	if (ret) {
	dev_err(dev, "usbmisc init failed, ret=%d\n", ret);
	goto err_clk;
	}

	data->ci_pdev = ci_hdrc_add_device(dev,
	pdev->resource, pdev->num_resources,
	&pdata);
	if (IS_ERR(data->ci_pdev)) {
	ret = PTR_ERR(data->ci_pdev);
	dev_err_probe(dev, ret, "ci_hdrc_add_device failed\n");
	goto err_clk;
	}

	if (data->usbmisc_data) {
	if (!IS_ERR(pdata.id_extcon.edev) \|\|
	of_property_read_bool(np, "usb-role-switch"))
	data->usbmisc_data->ext_id = 1;

	if (!IS_ERR(pdata.vbus_extcon.edev) \|\|
	of_property_read_bool(np, "usb-role-switch"))
	data->usbmisc_data->ext_vbus = 1;

	/* usbmisc needs to know dr mode to choose wakeup setting */
	data->usbmisc_data->available_role =
	ci_hdrc_query_available_role(data->ci_pdev);
	}

	ret = imx_usbmisc_init_post(data->usbmisc_data);
	if (ret) {
	dev_err(dev, "usbmisc post failed, ret=%d\n", ret);
	goto disable_device;
	}

	if (data->supports_runtime_pm) {
	pm_runtime_set_active(dev);
	pm_runtime_enable(dev);
	}

	device_set_wakeup_capable(dev, true);

	return 0;

	disable_device:
	ci_hdrc_remove_device(data->ci_pdev);
	err_clk:
	clk_disable_unprepare(data->clk_wakeup);
	err_wakeup_clk:
	imx_disable_unprepare_clks(dev);
	disable_hsic_regulator:
	if (data->hsic_pad_regulator)
	/* don't overwrite original ret (cf. EPROBE_DEFER) */
	regulator_disable(data->hsic_pad_regulator);
	if (pdata.flags & CI_HDRC_PMQOS)
	cpu_latency_qos_remove_request(&data->pm_qos_req);
	data->ci_pdev = NULL;
	return ret;
	}

	static void ci_hdrc_imx_remove(struct platform_device *pdev)
	{
	struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);

	if (data->supports_runtime_pm) {
	pm_runtime_get_sync(&pdev->dev);
	pm_runtime_disable(&pdev->dev);
	pm_runtime_put_noidle(&pdev->dev);
	}
	if (data->ci_pdev)
	ci_hdrc_remove_device(data->ci_pdev);
	if (data->override_phy_control)
	usb_phy_shutdown(data->phy);
	if (data->ci_pdev) {
	imx_disable_unprepare_clks(&pdev->dev);
	clk_disable_unprepare(data->clk_wakeup);
	if (data->plat_data->flags & CI_HDRC_PMQOS)
	cpu_latency_qos_remove_request(&data->pm_qos_req);
	if (data->hsic_pad_regulator)
	regulator_disable(data->hsic_pad_regulator);
	}
	}

	static void ci_hdrc_imx_shutdown(struct platform_device *pdev)
	{
	ci_hdrc_imx_remove(pdev);
	}

	static int __maybe_unused imx_controller_suspend(struct device *dev,
	pm_message_t msg)
	{
	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
	int ret = 0;

	dev_dbg(dev, "at %s\n", __func__);

	ret = imx_usbmisc_suspend(data->usbmisc_data,
	PMSG_IS_AUTO(msg) \|\| device_may_wakeup(dev));
	if (ret) {
	dev_err(dev,
	"usbmisc suspend failed, ret=%d\n", ret);
	return ret;
	}

	imx_disable_unprepare_clks(dev);
	if (data->plat_data->flags & CI_HDRC_PMQOS)
	cpu_latency_qos_remove_request(&data->pm_qos_req);

	data->in_lpm = true;

	return 0;
	}

	static int __maybe_unused imx_controller_resume(struct device *dev,
	pm_message_t msg)
	{
	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
	int ret = 0;

	dev_dbg(dev, "at %s\n", __func__);

	if (!data->in_lpm) {
	WARN_ON(1);
	return 0;
	}

	if (data->plat_data->flags & CI_HDRC_PMQOS)
	cpu_latency_qos_add_request(&data->pm_qos_req, 0);

	ret = imx_prepare_enable_clks(dev);
	if (ret)
	return ret;

	data->in_lpm = false;

	ret = imx_usbmisc_resume(data->usbmisc_data,
	PMSG_IS_AUTO(msg) \|\| device_may_wakeup(dev));
	if (ret) {
	dev_err(dev, "usbmisc resume failed, ret=%d\n", ret);
	goto clk_disable;
	}

	return 0;

	clk_disable:
	imx_disable_unprepare_clks(dev);
	return ret;
	}

	static int __maybe_unused ci_hdrc_imx_suspend(struct device *dev)
	{
	int ret;

	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);

	if (data->in_lpm)
	/* The core's suspend doesn't run */
	return 0;

	ret = imx_controller_suspend(dev, PMSG_SUSPEND);
	if (ret)
	return ret;

	pinctrl_pm_select_sleep_state(dev);
	return ret;
	}

	static int __maybe_unused ci_hdrc_imx_resume(struct device *dev)
	{
	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
	int ret;

	pinctrl_pm_select_default_state(dev);
	ret = imx_controller_resume(dev, PMSG_RESUME);
	if (!ret && data->supports_runtime_pm) {
	pm_runtime_disable(dev);
	pm_runtime_set_active(dev);
	pm_runtime_enable(dev);
	}

	return ret;
	}

	static int __maybe_unused ci_hdrc_imx_runtime_suspend(struct device *dev)
	{
	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);

	if (data->in_lpm) {
	WARN_ON(1);
	return 0;
	}

	return imx_controller_suspend(dev, PMSG_AUTO_SUSPEND);
	}

	static int __maybe_unused ci_hdrc_imx_runtime_resume(struct device *dev)
	{
	return imx_controller_resume(dev, PMSG_AUTO_RESUME);
	}

	static const struct dev_pm_ops ci_hdrc_imx_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(ci_hdrc_imx_suspend, ci_hdrc_imx_resume)
	SET_RUNTIME_PM_OPS(ci_hdrc_imx_runtime_suspend,
	ci_hdrc_imx_runtime_resume, NULL)
	};
	static struct platform_driver ci_hdrc_imx_driver = {
	.probe = ci_hdrc_imx_probe,
	.remove_new = ci_hdrc_imx_remove,
	.shutdown = ci_hdrc_imx_shutdown,
	.driver = {
	.name = "imx_usb",
	.of_match_table = ci_hdrc_imx_dt_ids,
	.pm = &ci_hdrc_imx_pm_ops,
	},
	};

	module_platform_driver(ci_hdrc_imx_driver);

	MODULE_ALIAS("platform:imx-usb");
	MODULE_LICENSE("GPL");
	MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
	MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
	MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");