1/*
2 * USB of helper code
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 */
9
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/of.h>
13#include <linux/usb/of.h>
14#include <linux/usb/otg.h>
15
16static const char *const usbphy_modes[] = {
17	[USBPHY_INTERFACE_MODE_UNKNOWN]	= "",
18	[USBPHY_INTERFACE_MODE_UTMI]	= "utmi",
19	[USBPHY_INTERFACE_MODE_UTMIW]	= "utmi_wide",
20	[USBPHY_INTERFACE_MODE_ULPI]	= "ulpi",
21	[USBPHY_INTERFACE_MODE_SERIAL]	= "serial",
22	[USBPHY_INTERFACE_MODE_HSIC]	= "hsic",
23};
24
25/**
26 * of_usb_get_phy_mode - Get phy mode for given device_node
27 * @np:	Pointer to the given device_node
28 *
29 * The function gets phy interface string from property 'phy_type',
30 * and returns the corresponding enum usb_phy_interface
31 */
32enum usb_phy_interface of_usb_get_phy_mode(struct device_node *np)
33{
34	const char *phy_type;
35	int err, i;
36
37	err = of_property_read_string(np, "phy_type", &phy_type);
38	if (err < 0)
39		return USBPHY_INTERFACE_MODE_UNKNOWN;
40
41	for (i = 0; i < ARRAY_SIZE(usbphy_modes); i++)
42		if (!strcmp(phy_type, usbphy_modes[i]))
43			return i;
44
45	return USBPHY_INTERFACE_MODE_UNKNOWN;
46}
47EXPORT_SYMBOL_GPL(of_usb_get_phy_mode);
48