[deliverable/linux.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->usb_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->usb_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)
{
	otg->host = host;
	if (!host)
		otg->state = OTG_STATE_UNDEFINED;

	return 0;
}

static int omap_usb_set_peripheral(struct usb_otg *otg,
		struct usb_gadget *gadget)
{
	otg->gadget = gadget;
	if (!gadget)
		otg->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,
};

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);

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(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)
		return -ENOMEM;

	otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL);
	if (!otg)
		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 (IS_ERR(phy->phy_base))
			return PTR_ERR(phy->phy_base);
		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->usb_phy		= &phy->phy;

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

	generic_phy = devm_phy_create(phy->dev, NULL, &ops);
	if (IS_ERR(generic_phy)) {
		pm_runtime_disable(phy->dev);
		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)) {
		pm_runtime_disable(phy->dev);
		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");
		}
	}

	if (!IS_ERR(phy->optclk))
		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);
	pm_runtime_disable(phy->dev);

	return 0;
}

#ifdef CONFIG_PM

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",
		.pm	= DEV_PM_OPS,
		.of_match_table = 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)
657b306a KVA	62	{
19c1eac2	63	struct omap_usb *phy = phy_to_omapusb(otg->usb_phy);
657b306a KVA	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	{
19c1eac2	73	struct omap_usb *phy = phy_to_omapusb(otg->usb_phy);
657b306a KVA	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	{
657b306a KVA	83	otg->host = host;
657b306a KVA	84	if (!host)
e47d9254	85	otg->state = OTG_STATE_UNDEFINED;
657b306a KVA	86
	87	return 0;
	88	}
	89
	90	static int omap_usb_set_peripheral(struct usb_otg *otg,
	91	struct usb_gadget *gadget)
	92	{
657b306a KVA	93	otg->gadget = gadget;
657b306a KVA	94	if (!gadget)
e47d9254	95	otg->state = OTG_STATE_UNDEFINED;
657b306a KVA	96
	97	return 0;
	98	}
	99
5d93d1e7 KVA	100	static int omap_usb_power_off(struct phy *x)
	101	{
	102	struct omap_usb *phy = phy_get_drvdata(x);
	103
14da699b	104	omap_control_phy_power(phy->control_dev, 0);
5d93d1e7 KVA	105
	106	return 0;
	107	}
	108
	109	static int omap_usb_power_on(struct phy *x)
	110	{
	111	struct omap_usb *phy = phy_get_drvdata(x);
	112
14da699b	113	omap_control_phy_power(phy->control_dev, 1);
5d93d1e7 KVA	114
	115	return 0;
	116	}
	117
7e472402 AB	118	static int omap_usb_init(struct phy *x)
	119	{
	120	struct omap_usb *phy = phy_get_drvdata(x);
	121	u32 val;
	122
	123	if (phy->flags & OMAP_USB2_CALIBRATE_FALSE_DISCONNECT) {
	124	/*
	125	*
	126	* Reduce the sensitivity of internal PHY by enabling the
	127	* DISCON_BYP_LATCH of the USB2PHY_ANA_CONFIG1 register. This
	128	* resolves issues with certain devices which can otherwise
	129	* be prone to false disconnects.
	130	*
	131	*/
	132	val = omap_usb_readl(phy->phy_base, USB2PHY_ANA_CONFIG1);
	133	val \|= USB2PHY_DISCON_BYP_LATCH;
	134	omap_usb_writel(phy->phy_base, USB2PHY_ANA_CONFIG1, val);
	135	}
	136
	137	return 0;
	138	}
	139
5d93d1e7	140	static struct phy_ops ops = {
7e472402	141	.init = omap_usb_init,
5d93d1e7 KVA	142	.power_on = omap_usb_power_on,
	143	.power_off = omap_usb_power_off,
	144	.owner = THIS_MODULE,
	145	};
	146
09a0168d GC	147	static const struct usb_phy_data omap_usb2_data = {
	148	.label = "omap_usb2",
	149	.flags = OMAP_USB2_HAS_START_SRP \| OMAP_USB2_HAS_SET_VBUS,
	150	};
	151
db68e80f GC	152	static const struct usb_phy_data omap5_usb2_data = {
	153	.label = "omap5_usb2",
	154	.flags = 0,
	155	};
	156
7e472402 AB	157	static const struct usb_phy_data dra7x_usb2_data = {
	158	.label = "dra7x_usb2",
	159	.flags = OMAP_USB2_CALIBRATE_FALSE_DISCONNECT,
	160	};
	161
09a0168d GC	162	static const struct usb_phy_data am437x_usb2_data = {
	163	.label = "am437x_usb2",
	164	.flags = 0,
	165	};
	166
	167	static const struct of_device_id omap_usb2_id_table[] = {
	168	{
	169	.compatible = "ti,omap-usb2",
	170	.data = &omap_usb2_data,
	171	},
db68e80f GC	172	{
	173	.compatible = "ti,omap5-usb2",
	174	.data = &omap5_usb2_data,
	175	},
7e472402 AB	176	{
	177	.compatible = "ti,dra7x-usb2",
	178	.data = &dra7x_usb2_data,
	179	},
09a0168d GC	180	{
	181	.compatible = "ti,am437x-usb2",
	182	.data = &am437x_usb2_data,
	183	},
	184	{},
	185	};
	186	MODULE_DEVICE_TABLE(of, omap_usb2_id_table);
09a0168d	187
41ac7b3a	188	static int omap_usb2_probe(struct platform_device *pdev)
657b306a	189	{
478b6c74 RQ	190	struct omap_usb *phy;
478b6c74 RQ	191	struct phy *generic_phy;
7e472402	192	struct resource *res;
478b6c74 RQ	193	struct phy_provider *phy_provider;
	194	struct usb_otg *otg;
	195	struct device_node *node = pdev->dev.of_node;
	196	struct device_node *control_node;
	197	struct platform_device *control_pdev;
09a0168d GC	198	const struct of_device_id *of_id;
	199	struct usb_phy_data *phy_data;
	200
52a4a72a	201	of_id = of_match_device(omap_usb2_id_table, &pdev->dev);
478b6c74	202
09a0168d	203	if (!of_id)
478b6c74	204	return -EINVAL;
657b306a	205
09a0168d GC	206	phy_data = (struct usb_phy_data *)of_id->data;
09a0168d GC	207
657b306a	208	phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL);
0b68253d	209	if (!phy)
657b306a	210	return -ENOMEM;
657b306a KVA	211
657b306a KVA	212	otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL);
0b68253d	213	if (!otg)
657b306a	214	return -ENOMEM;
657b306a KVA	215
	216	phy->dev = &pdev->dev;
	217
	218	phy->phy.dev = phy->dev;
09a0168d	219	phy->phy.label = phy_data->label;
657b306a	220	phy->phy.otg = otg;
c11747f6	221	phy->phy.type = USB_PHY_TYPE_USB2;
657b306a	222
7e472402 AB	223	if (phy_data->flags & OMAP_USB2_CALIBRATE_FALSE_DISCONNECT) {
	224	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	225	phy->phy_base = devm_ioremap_resource(&pdev->dev, res);
3df9fcd5 HS	226	if (IS_ERR(phy->phy_base))
3df9fcd5 HS	227	return PTR_ERR(phy->phy_base);
7e472402 AB	228	phy->flags \|= OMAP_USB2_CALIBRATE_FALSE_DISCONNECT;
	229	}
	230
478b6c74 RQ	231	control_node = of_parse_phandle(node, "ctrl-module", 0);
	232	if (!control_node) {
	233	dev_err(&pdev->dev, "Failed to get control device phandle\n");
	234	return -EINVAL;
657b306a KVA	235	}
657b306a KVA	236
478b6c74 RQ	237	control_pdev = of_find_device_by_node(control_node);
	238	if (!control_pdev) {
	239	dev_err(&pdev->dev, "Failed to get control device\n");
	240	return -EINVAL;
	241	}
	242
	243	phy->control_dev = &control_pdev->dev;
14da699b	244	omap_control_phy_power(phy->control_dev, 0);
657b306a KVA	245
	246	otg->set_host = omap_usb_set_host;
	247	otg->set_peripheral = omap_usb_set_peripheral;
09a0168d GC	248	if (phy_data->flags & OMAP_USB2_HAS_SET_VBUS)
	249	otg->set_vbus = omap_usb_set_vbus;
	250	if (phy_data->flags & OMAP_USB2_HAS_START_SRP)
	251	otg->start_srp = omap_usb_start_srp;
19c1eac2	252	otg->usb_phy = &phy->phy;
657b306a	253
5d93d1e7	254	platform_set_drvdata(pdev, phy);
f20531a9	255	pm_runtime_enable(phy->dev);
5d93d1e7	256
dbc98635	257	generic_phy = devm_phy_create(phy->dev, NULL, &ops);
f20531a9 OG	258	if (IS_ERR(generic_phy)) {
f20531a9 OG	259	pm_runtime_disable(phy->dev);
5d93d1e7	260	return PTR_ERR(generic_phy);
f20531a9	261	}
5d93d1e7 KVA	262
	263	phy_set_drvdata(generic_phy, phy);
	264
64fe1891 KVA	265	phy_provider = devm_of_phy_provider_register(phy->dev,
64fe1891 KVA	266	of_phy_simple_xlate);
eb82a3d8 RQ	267	if (IS_ERR(phy_provider)) {
eb82a3d8 RQ	268	pm_runtime_disable(phy->dev);
64fe1891	269	return PTR_ERR(phy_provider);
eb82a3d8	270	}
64fe1891	271
9f1d8ed2	272	phy->wkupclk = devm_clk_get(phy->dev, "wkupclk");
657b306a	273	if (IS_ERR(phy->wkupclk)) {
9f1d8ed2 RQ	274	dev_warn(&pdev->dev, "unable to get wkupclk, trying old name\n");
	275	phy->wkupclk = devm_clk_get(phy->dev, "usb_phy_cm_clk32k");
	276	if (IS_ERR(phy->wkupclk)) {
	277	dev_err(&pdev->dev, "unable to get usb_phy_cm_clk32k\n");
	278	return PTR_ERR(phy->wkupclk);
	279	} else {
	280	dev_warn(&pdev->dev,
	281	"found usb_phy_cm_clk32k, please fix DTS\n");
	282	}
657b306a KVA	283	}
	284	clk_prepare(phy->wkupclk);
	285
9f1d8ed2 RQ	286	phy->optclk = devm_clk_get(phy->dev, "refclk");
	287	if (IS_ERR(phy->optclk)) {
	288	dev_dbg(&pdev->dev, "unable to get refclk, trying old name\n");
	289	phy->optclk = devm_clk_get(phy->dev, "usb_otg_ss_refclk960m");
	290	if (IS_ERR(phy->optclk)) {
	291	dev_dbg(&pdev->dev,
	292	"unable to get usb_otg_ss_refclk960m\n");
	293	} else {
	294	dev_warn(&pdev->dev,
	295	"found usb_otg_ss_refclk960m, please fix DTS\n");
	296	}
9f1d8ed2	297	}
0c4c8bbb	298
b1ff3231 AL	299	if (!IS_ERR(phy->optclk))
	300	clk_prepare(phy->optclk);
	301
c11747f6	302	usb_add_phy_dev(&phy->phy);
657b306a	303
657b306a KVA	304	return 0;
	305	}
	306
fb4e98ab	307	static int omap_usb2_remove(struct platform_device *pdev)
657b306a KVA	308	{
	309	struct omap_usb *phy = platform_get_drvdata(pdev);
	310
	311	clk_unprepare(phy->wkupclk);
0c4c8bbb KVA	312	if (!IS_ERR(phy->optclk))
0c4c8bbb KVA	313	clk_unprepare(phy->optclk);
657b306a	314	usb_remove_phy(&phy->phy);
eb82a3d8	315	pm_runtime_disable(phy->dev);
657b306a KVA	316
	317	return 0;
	318	}
	319
7ba37053	320	#ifdef CONFIG_PM
657b306a KVA	321
	322	static int omap_usb2_runtime_suspend(struct device *dev)
	323	{
	324	struct platform_device *pdev = to_platform_device(dev);
	325	struct omap_usb *phy = platform_get_drvdata(pdev);
	326
	327	clk_disable(phy->wkupclk);
0c4c8bbb KVA	328	if (!IS_ERR(phy->optclk))
0c4c8bbb KVA	329	clk_disable(phy->optclk);
657b306a KVA	330
	331	return 0;
	332	}
	333
	334	static int omap_usb2_runtime_resume(struct device *dev)
	335	{
657b306a KVA	336	struct platform_device *pdev = to_platform_device(dev);
657b306a KVA	337	struct omap_usb *phy = platform_get_drvdata(pdev);
0f827684	338	int ret;
657b306a KVA	339
657b306a KVA	340	ret = clk_enable(phy->wkupclk);
0c4c8bbb	341	if (ret < 0) {
657b306a	342	dev_err(phy->dev, "Failed to enable wkupclk %d\n", ret);
0c4c8bbb KVA	343	goto err0;
	344	}
	345
	346	if (!IS_ERR(phy->optclk)) {
	347	ret = clk_enable(phy->optclk);
	348	if (ret < 0) {
	349	dev_err(phy->dev, "Failed to enable optclk %d\n", ret);
	350	goto err1;
	351	}
	352	}
	353
	354	return 0;
	355
	356	err1:
	357	clk_disable(phy->wkupclk);
657b306a	358
0c4c8bbb	359	err0:
657b306a KVA	360	return ret;
	361	}
	362
	363	static const struct dev_pm_ops omap_usb2_pm_ops = {
	364	SET_RUNTIME_PM_OPS(omap_usb2_runtime_suspend, omap_usb2_runtime_resume,
	365	NULL)
	366	};
	367
	368	#define DEV_PM_OPS (&omap_usb2_pm_ops)
	369	#else
	370	#define DEV_PM_OPS NULL
	371	#endif
	372
657b306a KVA	373	static struct platform_driver omap_usb2_driver = {
657b306a KVA	374	.probe = omap_usb2_probe,
7690417d	375	.remove = omap_usb2_remove,
657b306a KVA	376	.driver = {
657b306a KVA	377	.name = "omap-usb2",
657b306a	378	.pm = DEV_PM_OPS,
52a4a72a	379	.of_match_table = omap_usb2_id_table,
657b306a KVA	380	},
	381	};
	382
	383	module_platform_driver(omap_usb2_driver);
	384
dd64ad38	385	MODULE_ALIAS("platform:omap_usb2");
657b306a KVA	386	MODULE_AUTHOR("Texas Instruments Inc.");
	387	MODULE_DESCRIPTION("OMAP USB2 phy driver");
	388	MODULE_LICENSE("GPL v2");