[linux-2.6-block.git] / drivers / phy / phy-omap-usb2.c

/*
 * omap-usb2.c - USB PHY, talking to musb controller in OMAP.
 *
 * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Author: Kishon Vijay Abraham I <kishon@ti.com>
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/io.h>
#include <linux/phy/omap_usb.h>
#include <linux/usb/phy_companion.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/pm_runtime.h>
#include <linux/delay.h>
#include <linux/phy/omap_control_phy.h>
#include <linux/phy/phy.h>
#include <linux/of_platform.h>

#define USB2PHY_DISCON_BYP_LATCH (1 << 31)
#define USB2PHY_ANA_CONFIG1 0x4c

/**
 * omap_usb2_set_comparator - links the comparator present in the sytem with
 *	this phy
 * @comparator - the companion phy(comparator) for this phy
 *
 * The phy companion driver should call this API passing the phy_companion
 * filled with set_vbus and start_srp to be used by usb phy.
 *
 * For use by phy companion driver
 */
int omap_usb2_set_comparator(struct phy_companion *comparator)
{
	struct omap_usb	*phy;
	struct usb_phy	*x = usb_get_phy(USB_PHY_TYPE_USB2);

	if (IS_ERR(x))
		return -ENODEV;

	phy = phy_to_omapusb(x);
	phy->comparator = comparator;
	return 0;
}
EXPORT_SYMBOL_GPL(omap_usb2_set_comparator);

static int omap_usb_set_vbus(struct usb_otg *otg, bool enabled)
{
	struct omap_usb *phy = phy_to_omapusb(otg->phy);

	if (!phy->comparator)
		return -ENODEV;

	return phy->comparator->set_vbus(phy->comparator, enabled);
}

static int omap_usb_start_srp(struct usb_otg *otg)
{
	struct omap_usb *phy = phy_to_omapusb(otg->phy);

	if (!phy->comparator)
		return -ENODEV;

	return phy->comparator->start_srp(phy->comparator);
}

static int omap_usb_set_host(struct usb_otg *otg, struct usb_bus *host)
{
	struct usb_phy	*phy = otg->phy;

	otg->host = host;
	if (!host)
		phy->state = OTG_STATE_UNDEFINED;

	return 0;
}

static int omap_usb_set_peripheral(struct usb_otg *otg,
		struct usb_gadget *gadget)
{
	struct usb_phy	*phy = otg->phy;

	otg->gadget = gadget;
	if (!gadget)
		phy->state = OTG_STATE_UNDEFINED;

	return 0;
}

static int omap_usb_power_off(struct phy *x)
{
	struct omap_usb *phy = phy_get_drvdata(x);

	omap_control_phy_power(phy->control_dev, 0);

	return 0;
}

static int omap_usb_power_on(struct phy *x)
{
	struct omap_usb *phy = phy_get_drvdata(x);

	omap_control_phy_power(phy->control_dev, 1);

	return 0;
}

static int omap_usb_init(struct phy *x)
{
	struct omap_usb *phy = phy_get_drvdata(x);
	u32 val;

	if (phy->flags & OMAP_USB2_CALIBRATE_FALSE_DISCONNECT) {
		/*
		 *
		 * Reduce the sensitivity of internal PHY by enabling the
		 * DISCON_BYP_LATCH of the USB2PHY_ANA_CONFIG1 register. This
		 * resolves issues with certain devices which can otherwise
		 * be prone to false disconnects.
		 *
		 */
		val = omap_usb_readl(phy->phy_base, USB2PHY_ANA_CONFIG1);
		val |= USB2PHY_DISCON_BYP_LATCH;
		omap_usb_writel(phy->phy_base, USB2PHY_ANA_CONFIG1, val);
	}

	return 0;
}

static struct phy_ops ops = {
	.init		= omap_usb_init,
	.power_on	= omap_usb_power_on,
	.power_off	= omap_usb_power_off,
	.owner		= THIS_MODULE,
};

#ifdef CONFIG_OF
static const struct usb_phy_data omap_usb2_data = {
	.label = "omap_usb2",
	.flags = OMAP_USB2_HAS_START_SRP | OMAP_USB2_HAS_SET_VBUS,
};

static const struct usb_phy_data omap5_usb2_data = {
	.label = "omap5_usb2",
	.flags = 0,
};

static const struct usb_phy_data dra7x_usb2_data = {
	.label = "dra7x_usb2",
	.flags = OMAP_USB2_CALIBRATE_FALSE_DISCONNECT,
};

static const struct usb_phy_data am437x_usb2_data = {
	.label = "am437x_usb2",
	.flags =  0,
};

static const struct of_device_id omap_usb2_id_table[] = {
	{
		.compatible = "ti,omap-usb2",
		.data = &omap_usb2_data,
	},
	{
		.compatible = "ti,omap5-usb2",
		.data = &omap5_usb2_data,
	},
	{
		.compatible = "ti,dra7x-usb2",
		.data = &dra7x_usb2_data,
	},
	{
		.compatible = "ti,am437x-usb2",
		.data = &am437x_usb2_data,
	},
	{},
};
MODULE_DEVICE_TABLE(of, omap_usb2_id_table);
#endif

static int omap_usb2_probe(struct platform_device *pdev)
{
	struct omap_usb	*phy;
	struct phy *generic_phy;
	struct resource *res;
	struct phy_provider *phy_provider;
	struct usb_otg *otg;
	struct device_node *node = pdev->dev.of_node;
	struct device_node *control_node;
	struct platform_device *control_pdev;
	const struct of_device_id *of_id;
	struct usb_phy_data *phy_data;

	of_id = of_match_device(of_match_ptr(omap_usb2_id_table), &pdev->dev);

	if (!of_id)
		return -EINVAL;

	phy_data = (struct usb_phy_data *)of_id->data;

	phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL);
	if (!phy) {
		dev_err(&pdev->dev, "unable to allocate memory for USB2 PHY\n");
		return -ENOMEM;
	}

	otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL);
	if (!otg) {
		dev_err(&pdev->dev, "unable to allocate memory for USB OTG\n");
		return -ENOMEM;
	}

	phy->dev		= &pdev->dev;

	phy->phy.dev		= phy->dev;
	phy->phy.label		= phy_data->label;
	phy->phy.otg		= otg;
	phy->phy.type		= USB_PHY_TYPE_USB2;

	if (phy_data->flags & OMAP_USB2_CALIBRATE_FALSE_DISCONNECT) {
		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
		phy->phy_base = devm_ioremap_resource(&pdev->dev, res);
		if (!phy->phy_base)
			return -ENOMEM;
		phy->flags |= OMAP_USB2_CALIBRATE_FALSE_DISCONNECT;
	}

	control_node = of_parse_phandle(node, "ctrl-module", 0);
	if (!control_node) {
		dev_err(&pdev->dev, "Failed to get control device phandle\n");
		return -EINVAL;
	}

	control_pdev = of_find_device_by_node(control_node);
	if (!control_pdev) {
		dev_err(&pdev->dev, "Failed to get control device\n");
		return -EINVAL;
	}

	phy->control_dev = &control_pdev->dev;
	omap_control_phy_power(phy->control_dev, 0);

	otg->set_host		= omap_usb_set_host;
	otg->set_peripheral	= omap_usb_set_peripheral;
	if (phy_data->flags & OMAP_USB2_HAS_SET_VBUS)
		otg->set_vbus		= omap_usb_set_vbus;
	if (phy_data->flags & OMAP_USB2_HAS_START_SRP)
		otg->start_srp		= omap_usb_start_srp;
	otg->phy		= &phy->phy;

	platform_set_drvdata(pdev, phy);
	pm_runtime_enable(phy->dev);

	generic_phy = devm_phy_create(phy->dev, &ops, NULL);
	if (IS_ERR(generic_phy))
		return PTR_ERR(generic_phy);

	phy_set_drvdata(generic_phy, phy);

	phy_provider = devm_of_phy_provider_register(phy->dev,
			of_phy_simple_xlate);
	if (IS_ERR(phy_provider))
		return PTR_ERR(phy_provider);

	phy->wkupclk = devm_clk_get(phy->dev, "wkupclk");
	if (IS_ERR(phy->wkupclk)) {
		dev_warn(&pdev->dev, "unable to get wkupclk, trying old name\n");
		phy->wkupclk = devm_clk_get(phy->dev, "usb_phy_cm_clk32k");
		if (IS_ERR(phy->wkupclk)) {
			dev_err(&pdev->dev, "unable to get usb_phy_cm_clk32k\n");
			return PTR_ERR(phy->wkupclk);
		} else {
			dev_warn(&pdev->dev,
				 "found usb_phy_cm_clk32k, please fix DTS\n");
		}
	}
	clk_prepare(phy->wkupclk);

	phy->optclk = devm_clk_get(phy->dev, "refclk");
	if (IS_ERR(phy->optclk)) {
		dev_dbg(&pdev->dev, "unable to get refclk, trying old name\n");
		phy->optclk = devm_clk_get(phy->dev, "usb_otg_ss_refclk960m");
		if (IS_ERR(phy->optclk)) {
			dev_dbg(&pdev->dev,
				"unable to get usb_otg_ss_refclk960m\n");
		} else {
			dev_warn(&pdev->dev,
				 "found usb_otg_ss_refclk960m, please fix DTS\n");
		}
	} else {
		clk_prepare(phy->optclk);
	}

	usb_add_phy_dev(&phy->phy);

	return 0;
}

static int omap_usb2_remove(struct platform_device *pdev)
{
	struct omap_usb	*phy = platform_get_drvdata(pdev);

	clk_unprepare(phy->wkupclk);
	if (!IS_ERR(phy->optclk))
		clk_unprepare(phy->optclk);
	usb_remove_phy(&phy->phy);

	return 0;
}

#ifdef CONFIG_PM_RUNTIME

static int omap_usb2_runtime_suspend(struct device *dev)
{
	struct platform_device	*pdev = to_platform_device(dev);
	struct omap_usb	*phy = platform_get_drvdata(pdev);

	clk_disable(phy->wkupclk);
	if (!IS_ERR(phy->optclk))
		clk_disable(phy->optclk);

	return 0;
}

static int omap_usb2_runtime_resume(struct device *dev)
{
	struct platform_device	*pdev = to_platform_device(dev);
	struct omap_usb	*phy = platform_get_drvdata(pdev);
	int ret;

	ret = clk_enable(phy->wkupclk);
	if (ret < 0) {
		dev_err(phy->dev, "Failed to enable wkupclk %d\n", ret);
		goto err0;
	}

	if (!IS_ERR(phy->optclk)) {
		ret = clk_enable(phy->optclk);
		if (ret < 0) {
			dev_err(phy->dev, "Failed to enable optclk %d\n", ret);
			goto err1;
		}
	}

	return 0;

err1:
	clk_disable(phy->wkupclk);

err0:
	return ret;
}

static const struct dev_pm_ops omap_usb2_pm_ops = {
	SET_RUNTIME_PM_OPS(omap_usb2_runtime_suspend, omap_usb2_runtime_resume,
		NULL)
};

#define DEV_PM_OPS     (&omap_usb2_pm_ops)
#else
#define DEV_PM_OPS     NULL
#endif

static struct platform_driver omap_usb2_driver = {
	.probe		= omap_usb2_probe,
	.remove		= omap_usb2_remove,
	.driver		= {
		.name	= "omap-usb2",
		.owner	= THIS_MODULE,
		.pm	= DEV_PM_OPS,
		.of_match_table = of_match_ptr(omap_usb2_id_table),
	},
};

module_platform_driver(omap_usb2_driver);

MODULE_ALIAS("platform: omap_usb2");
MODULE_AUTHOR("Texas Instruments Inc.");
MODULE_DESCRIPTION("OMAP USB2 phy driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
657b306a KVA	1	/*
	2	* omap-usb2.c - USB PHY, talking to musb controller in OMAP.
	3	*
	4	* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation; either version 2 of the License, or
	8	* (at your option) any later version.
	9	*
	10	* Author: Kishon Vijay Abraham I <kishon@ti.com>
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	*/
	18
	19	#include <linux/module.h>
	20	#include <linux/platform_device.h>
	21	#include <linux/slab.h>
	22	#include <linux/of.h>
	23	#include <linux/io.h>
6284be23	24	#include <linux/phy/omap_usb.h>
657b306a KVA	25	#include <linux/usb/phy_companion.h>
	26	#include <linux/clk.h>
	27	#include <linux/err.h>
	28	#include <linux/pm_runtime.h>
	29	#include <linux/delay.h>
14da699b	30	#include <linux/phy/omap_control_phy.h>
5d93d1e7	31	#include <linux/phy/phy.h>
478b6c74	32	#include <linux/of_platform.h>
657b306a	33
7e472402 AB	34	#define USB2PHY_DISCON_BYP_LATCH (1 << 31)
	35	#define USB2PHY_ANA_CONFIG1 0x4c
	36
657b306a KVA	37	/**
	38	* omap_usb2_set_comparator - links the comparator present in the sytem with
	39	* this phy
	40	* @comparator - the companion phy(comparator) for this phy
	41	*
	42	* The phy companion driver should call this API passing the phy_companion
	43	* filled with set_vbus and start_srp to be used by usb phy.
	44	*
	45	* For use by phy companion driver
	46	*/
	47	int omap_usb2_set_comparator(struct phy_companion *comparator)
	48	{
	49	struct omap_usb *phy;
	50	struct usb_phy *x = usb_get_phy(USB_PHY_TYPE_USB2);
	51
	52	if (IS_ERR(x))
	53	return -ENODEV;
	54
	55	phy = phy_to_omapusb(x);
	56	phy->comparator = comparator;
	57	return 0;
	58	}
	59	EXPORT_SYMBOL_GPL(omap_usb2_set_comparator);
	60
657b306a KVA	61	static int omap_usb_set_vbus(struct usb_otg *otg, bool enabled)
	62	{
	63	struct omap_usb *phy = phy_to_omapusb(otg->phy);
	64
	65	if (!phy->comparator)
	66	return -ENODEV;
	67
	68	return phy->comparator->set_vbus(phy->comparator, enabled);
	69	}
	70
	71	static int omap_usb_start_srp(struct usb_otg *otg)
	72	{
	73	struct omap_usb *phy = phy_to_omapusb(otg->phy);
	74
	75	if (!phy->comparator)
	76	return -ENODEV;
	77
	78	return phy->comparator->start_srp(phy->comparator);
	79	}
	80
	81	static int omap_usb_set_host(struct usb_otg otg, struct usb_bus host)
	82	{
	83	struct usb_phy *phy = otg->phy;
	84
	85	otg->host = host;
	86	if (!host)
	87	phy->state = OTG_STATE_UNDEFINED;
	88
	89	return 0;
	90	}
	91
	92	static int omap_usb_set_peripheral(struct usb_otg *otg,
	93	struct usb_gadget *gadget)
	94	{
	95	struct usb_phy *phy = otg->phy;
	96
	97	otg->gadget = gadget;
	98	if (!gadget)
	99	phy->state = OTG_STATE_UNDEFINED;
	100
	101	return 0;
	102	}
	103
5d93d1e7 KVA	104	static int omap_usb_power_off(struct phy *x)
	105	{
	106	struct omap_usb *phy = phy_get_drvdata(x);
	107
14da699b	108	omap_control_phy_power(phy->control_dev, 0);
5d93d1e7 KVA	109
	110	return 0;
	111	}
	112
	113	static int omap_usb_power_on(struct phy *x)
	114	{
	115	struct omap_usb *phy = phy_get_drvdata(x);
	116
14da699b	117	omap_control_phy_power(phy->control_dev, 1);
5d93d1e7 KVA	118
	119	return 0;
	120	}
	121
7e472402 AB	122	static int omap_usb_init(struct phy *x)
	123	{
	124	struct omap_usb *phy = phy_get_drvdata(x);
	125	u32 val;
	126
	127	if (phy->flags & OMAP_USB2_CALIBRATE_FALSE_DISCONNECT) {
	128	/*
	129	*
	130	* Reduce the sensitivity of internal PHY by enabling the
	131	* DISCON_BYP_LATCH of the USB2PHY_ANA_CONFIG1 register. This
	132	* resolves issues with certain devices which can otherwise
	133	* be prone to false disconnects.
	134	*
	135	*/
	136	val = omap_usb_readl(phy->phy_base, USB2PHY_ANA_CONFIG1);
	137	val \|= USB2PHY_DISCON_BYP_LATCH;
	138	omap_usb_writel(phy->phy_base, USB2PHY_ANA_CONFIG1, val);
	139	}
	140
	141	return 0;
	142	}
	143
5d93d1e7	144	static struct phy_ops ops = {
7e472402	145	.init = omap_usb_init,
5d93d1e7 KVA	146	.power_on = omap_usb_power_on,
	147	.power_off = omap_usb_power_off,
	148	.owner = THIS_MODULE,
	149	};
	150
09a0168d GC	151	#ifdef CONFIG_OF
	152	static const struct usb_phy_data omap_usb2_data = {
	153	.label = "omap_usb2",
	154	.flags = OMAP_USB2_HAS_START_SRP \| OMAP_USB2_HAS_SET_VBUS,
	155	};
	156
db68e80f GC	157	static const struct usb_phy_data omap5_usb2_data = {
	158	.label = "omap5_usb2",
	159	.flags = 0,
	160	};
	161
7e472402 AB	162	static const struct usb_phy_data dra7x_usb2_data = {
	163	.label = "dra7x_usb2",
	164	.flags = OMAP_USB2_CALIBRATE_FALSE_DISCONNECT,
	165	};
	166
09a0168d GC	167	static const struct usb_phy_data am437x_usb2_data = {
	168	.label = "am437x_usb2",
	169	.flags = 0,
	170	};
	171
	172	static const struct of_device_id omap_usb2_id_table[] = {
	173	{
	174	.compatible = "ti,omap-usb2",
	175	.data = &omap_usb2_data,
	176	},
db68e80f GC	177	{
	178	.compatible = "ti,omap5-usb2",
	179	.data = &omap5_usb2_data,
	180	},
7e472402 AB	181	{
	182	.compatible = "ti,dra7x-usb2",
	183	.data = &dra7x_usb2_data,
	184	},
09a0168d GC	185	{
	186	.compatible = "ti,am437x-usb2",
	187	.data = &am437x_usb2_data,
	188	},
	189	{},
	190	};
	191	MODULE_DEVICE_TABLE(of, omap_usb2_id_table);
	192	#endif
	193
41ac7b3a	194	static int omap_usb2_probe(struct platform_device *pdev)
657b306a	195	{
478b6c74 RQ	196	struct omap_usb *phy;
478b6c74 RQ	197	struct phy *generic_phy;
7e472402	198	struct resource *res;
478b6c74 RQ	199	struct phy_provider *phy_provider;
	200	struct usb_otg *otg;
	201	struct device_node *node = pdev->dev.of_node;
	202	struct device_node *control_node;
	203	struct platform_device *control_pdev;
09a0168d GC	204	const struct of_device_id *of_id;
	205	struct usb_phy_data *phy_data;
	206
	207	of_id = of_match_device(of_match_ptr(omap_usb2_id_table), &pdev->dev);
478b6c74	208
09a0168d	209	if (!of_id)
478b6c74	210	return -EINVAL;
657b306a	211
09a0168d GC	212	phy_data = (struct usb_phy_data *)of_id->data;
09a0168d GC	213
657b306a KVA	214	phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL);
	215	if (!phy) {
	216	dev_err(&pdev->dev, "unable to allocate memory for USB2 PHY\n");
	217	return -ENOMEM;
	218	}
	219
	220	otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL);
	221	if (!otg) {
	222	dev_err(&pdev->dev, "unable to allocate memory for USB OTG\n");
	223	return -ENOMEM;
	224	}
	225
	226	phy->dev = &pdev->dev;
	227
	228	phy->phy.dev = phy->dev;
09a0168d	229	phy->phy.label = phy_data->label;
657b306a	230	phy->phy.otg = otg;
c11747f6	231	phy->phy.type = USB_PHY_TYPE_USB2;
657b306a	232
7e472402 AB	233	if (phy_data->flags & OMAP_USB2_CALIBRATE_FALSE_DISCONNECT) {
	234	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	235	phy->phy_base = devm_ioremap_resource(&pdev->dev, res);
	236	if (!phy->phy_base)
	237	return -ENOMEM;
	238	phy->flags \|= OMAP_USB2_CALIBRATE_FALSE_DISCONNECT;
	239	}
	240
478b6c74 RQ	241	control_node = of_parse_phandle(node, "ctrl-module", 0);
	242	if (!control_node) {
	243	dev_err(&pdev->dev, "Failed to get control device phandle\n");
	244	return -EINVAL;
657b306a KVA	245	}
657b306a KVA	246
478b6c74 RQ	247	control_pdev = of_find_device_by_node(control_node);
	248	if (!control_pdev) {
	249	dev_err(&pdev->dev, "Failed to get control device\n");
	250	return -EINVAL;
	251	}
	252
	253	phy->control_dev = &control_pdev->dev;
14da699b	254	omap_control_phy_power(phy->control_dev, 0);
657b306a KVA	255
	256	otg->set_host = omap_usb_set_host;
	257	otg->set_peripheral = omap_usb_set_peripheral;
09a0168d GC	258	if (phy_data->flags & OMAP_USB2_HAS_SET_VBUS)
	259	otg->set_vbus = omap_usb_set_vbus;
	260	if (phy_data->flags & OMAP_USB2_HAS_START_SRP)
	261	otg->start_srp = omap_usb_start_srp;
657b306a KVA	262	otg->phy = &phy->phy;
657b306a KVA	263
5d93d1e7 KVA	264	platform_set_drvdata(pdev, phy);
	265	pm_runtime_enable(phy->dev);
	266
	267	generic_phy = devm_phy_create(phy->dev, &ops, NULL);
	268	if (IS_ERR(generic_phy))
	269	return PTR_ERR(generic_phy);
	270
	271	phy_set_drvdata(generic_phy, phy);
	272
64fe1891 KVA	273	phy_provider = devm_of_phy_provider_register(phy->dev,
	274	of_phy_simple_xlate);
	275	if (IS_ERR(phy_provider))
	276	return PTR_ERR(phy_provider);
	277
9f1d8ed2	278	phy->wkupclk = devm_clk_get(phy->dev, "wkupclk");
657b306a	279	if (IS_ERR(phy->wkupclk)) {
9f1d8ed2 RQ	280	dev_warn(&pdev->dev, "unable to get wkupclk, trying old name\n");
	281	phy->wkupclk = devm_clk_get(phy->dev, "usb_phy_cm_clk32k");
	282	if (IS_ERR(phy->wkupclk)) {
	283	dev_err(&pdev->dev, "unable to get usb_phy_cm_clk32k\n");
	284	return PTR_ERR(phy->wkupclk);
	285	} else {
	286	dev_warn(&pdev->dev,
	287	"found usb_phy_cm_clk32k, please fix DTS\n");
	288	}
657b306a KVA	289	}
	290	clk_prepare(phy->wkupclk);
	291
9f1d8ed2 RQ	292	phy->optclk = devm_clk_get(phy->dev, "refclk");
	293	if (IS_ERR(phy->optclk)) {
	294	dev_dbg(&pdev->dev, "unable to get refclk, trying old name\n");
	295	phy->optclk = devm_clk_get(phy->dev, "usb_otg_ss_refclk960m");
	296	if (IS_ERR(phy->optclk)) {
	297	dev_dbg(&pdev->dev,
	298	"unable to get usb_otg_ss_refclk960m\n");
	299	} else {
	300	dev_warn(&pdev->dev,
	301	"found usb_otg_ss_refclk960m, please fix DTS\n");
	302	}
	303	} else {
0c4c8bbb	304	clk_prepare(phy->optclk);
9f1d8ed2	305	}
0c4c8bbb	306
c11747f6	307	usb_add_phy_dev(&phy->phy);
657b306a	308
657b306a KVA	309	return 0;
	310	}
	311
fb4e98ab	312	static int omap_usb2_remove(struct platform_device *pdev)
657b306a KVA	313	{
	314	struct omap_usb *phy = platform_get_drvdata(pdev);
	315
	316	clk_unprepare(phy->wkupclk);
0c4c8bbb KVA	317	if (!IS_ERR(phy->optclk))
0c4c8bbb KVA	318	clk_unprepare(phy->optclk);
657b306a KVA	319	usb_remove_phy(&phy->phy);
	320
	321	return 0;
	322	}
	323
	324	#ifdef CONFIG_PM_RUNTIME
	325
	326	static int omap_usb2_runtime_suspend(struct device *dev)
	327	{
	328	struct platform_device *pdev = to_platform_device(dev);
	329	struct omap_usb *phy = platform_get_drvdata(pdev);
	330
	331	clk_disable(phy->wkupclk);
0c4c8bbb KVA	332	if (!IS_ERR(phy->optclk))
0c4c8bbb KVA	333	clk_disable(phy->optclk);
657b306a KVA	334
	335	return 0;
	336	}
	337
	338	static int omap_usb2_runtime_resume(struct device *dev)
	339	{
657b306a KVA	340	struct platform_device *pdev = to_platform_device(dev);
657b306a KVA	341	struct omap_usb *phy = platform_get_drvdata(pdev);
0f827684	342	int ret;
657b306a KVA	343
657b306a KVA	344	ret = clk_enable(phy->wkupclk);
0c4c8bbb	345	if (ret < 0) {
657b306a	346	dev_err(phy->dev, "Failed to enable wkupclk %d\n", ret);
0c4c8bbb KVA	347	goto err0;
	348	}
	349
	350	if (!IS_ERR(phy->optclk)) {
	351	ret = clk_enable(phy->optclk);
	352	if (ret < 0) {
	353	dev_err(phy->dev, "Failed to enable optclk %d\n", ret);
	354	goto err1;
	355	}
	356	}
	357
	358	return 0;
	359
	360	err1:
	361	clk_disable(phy->wkupclk);
657b306a	362
0c4c8bbb	363	err0:
657b306a KVA	364	return ret;
	365	}
	366
	367	static const struct dev_pm_ops omap_usb2_pm_ops = {
	368	SET_RUNTIME_PM_OPS(omap_usb2_runtime_suspend, omap_usb2_runtime_resume,
	369	NULL)
	370	};
	371
	372	#define DEV_PM_OPS (&omap_usb2_pm_ops)
	373	#else
	374	#define DEV_PM_OPS NULL
	375	#endif
	376
657b306a KVA	377	static struct platform_driver omap_usb2_driver = {
657b306a KVA	378	.probe = omap_usb2_probe,
7690417d	379	.remove = omap_usb2_remove,
657b306a KVA	380	.driver = {
	381	.name = "omap-usb2",
	382	.owner = THIS_MODULE,
	383	.pm = DEV_PM_OPS,
	384	.of_match_table = of_match_ptr(omap_usb2_id_table),
	385	},
	386	};
	387
	388	module_platform_driver(omap_usb2_driver);
	389
	390	MODULE_ALIAS("platform: omap_usb2");
	391	MODULE_AUTHOR("Texas Instruments Inc.");
	392	MODULE_DESCRIPTION("OMAP USB2 phy driver");
	393	MODULE_LICENSE("GPL v2");