blob: 7ea0154da9d55cfbdc2577be053f4478ad0031d2 [file] [log] [blame]
Michael Grzeschik1c9af652013-06-13 17:59:55 +03001/*
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 correspondig 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);