1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * USB of helper code
4 */
5
6 #include <linux/kernel.h>
7 #include <linux/module.h>
8 #include <linux/of.h>
9 #include <linux/usb/of.h>
10 #include <linux/usb/otg.h>
11
12 static const char *const usbphy_modes[] = {
13 [USBPHY_INTERFACE_MODE_UNKNOWN] = "",
14 [USBPHY_INTERFACE_MODE_UTMI] = "utmi",
15 [USBPHY_INTERFACE_MODE_UTMIW] = "utmi_wide",
16 [USBPHY_INTERFACE_MODE_ULPI] = "ulpi",
17 [USBPHY_INTERFACE_MODE_SERIAL] = "serial",
18 [USBPHY_INTERFACE_MODE_HSIC] = "hsic",
19 };
20
21 /**
22 * of_usb_get_phy_mode - Get phy mode for given device_node
23 * @np: Pointer to the given device_node
24 *
25 * The function gets phy interface string from property 'phy_type',
26 * and returns the corresponding enum usb_phy_interface
27 */
of_usb_get_phy_mode(struct device_node * np)28 enum usb_phy_interface of_usb_get_phy_mode(struct device_node *np)
29 {
30 const char *phy_type;
31 int err, i;
32
33 err = of_property_read_string(np, "phy_type", &phy_type);
34 if (err < 0)
35 return USBPHY_INTERFACE_MODE_UNKNOWN;
36
37 for (i = 0; i < ARRAY_SIZE(usbphy_modes); i++)
38 if (!strcmp(phy_type, usbphy_modes[i]))
39 return i;
40
41 return USBPHY_INTERFACE_MODE_UNKNOWN;
42 }
43 EXPORT_SYMBOL_GPL(of_usb_get_phy_mode);
44