1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0+
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * USB of helper code
4*4882a593Smuzhiyun */
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun #include <linux/kernel.h>
7*4882a593Smuzhiyun #include <linux/module.h>
8*4882a593Smuzhiyun #include <linux/of.h>
9*4882a593Smuzhiyun #include <linux/usb/of.h>
10*4882a593Smuzhiyun #include <linux/usb/otg.h>
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun static const char *const usbphy_modes[] = {
13*4882a593Smuzhiyun [USBPHY_INTERFACE_MODE_UNKNOWN] = "",
14*4882a593Smuzhiyun [USBPHY_INTERFACE_MODE_UTMI] = "utmi",
15*4882a593Smuzhiyun [USBPHY_INTERFACE_MODE_UTMIW] = "utmi_wide",
16*4882a593Smuzhiyun [USBPHY_INTERFACE_MODE_ULPI] = "ulpi",
17*4882a593Smuzhiyun [USBPHY_INTERFACE_MODE_SERIAL] = "serial",
18*4882a593Smuzhiyun [USBPHY_INTERFACE_MODE_HSIC] = "hsic",
19*4882a593Smuzhiyun };
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun /**
22*4882a593Smuzhiyun * of_usb_get_phy_mode - Get phy mode for given device_node
23*4882a593Smuzhiyun * @np: Pointer to the given device_node
24*4882a593Smuzhiyun *
25*4882a593Smuzhiyun * The function gets phy interface string from property 'phy_type',
26*4882a593Smuzhiyun * and returns the corresponding enum usb_phy_interface
27*4882a593Smuzhiyun */
of_usb_get_phy_mode(struct device_node * np)28*4882a593Smuzhiyun enum usb_phy_interface of_usb_get_phy_mode(struct device_node *np)
29*4882a593Smuzhiyun {
30*4882a593Smuzhiyun const char *phy_type;
31*4882a593Smuzhiyun int err, i;
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun err = of_property_read_string(np, "phy_type", &phy_type);
34*4882a593Smuzhiyun if (err < 0)
35*4882a593Smuzhiyun return USBPHY_INTERFACE_MODE_UNKNOWN;
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun for (i = 0; i < ARRAY_SIZE(usbphy_modes); i++)
38*4882a593Smuzhiyun if (!strcmp(phy_type, usbphy_modes[i]))
39*4882a593Smuzhiyun return i;
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun return USBPHY_INTERFACE_MODE_UNKNOWN;
42*4882a593Smuzhiyun }
43*4882a593Smuzhiyun EXPORT_SYMBOL_GPL(of_usb_get_phy_mode);
44