| Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 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); |