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

   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
  12static 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 */
  28enum 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}
  43EXPORT_SYMBOL_GPL(of_usb_get_phy_mode);
  44