LXR linux/drivers/usb/phy/of.c

   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
  16static 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 */
  32enum 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}
  47EXPORT_SYMBOL_GPL(of_usb_get_phy_mode);
  48