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', 30 * and returns the corresponding enum usb_phy_interface 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); 48