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1c9af653 MG |
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 | ||
16 | static 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', | |
656e7c36 | 30 | * and returns the corresponding enum usb_phy_interface |
1c9af653 MG |
31 | */ |
32 | enum 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 | } | |
47 | EXPORT_SYMBOL_GPL(of_usb_get_phy_mode); |