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 */ 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