// SPDX-License-Identifier: GPL-2.0+
/*
 * USB of helper code
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/usb/of.h>
#include <linux/usb/otg.h>

static const char *const usbphy_modes[] = {
        [USBPHY_INTERFACE_MODE_UNKNOWN] = "",
        [USBPHY_INTERFACE_MODE_UTMI]    = "utmi",
        [USBPHY_INTERFACE_MODE_UTMIW]   = "utmi_wide",
        [USBPHY_INTERFACE_MODE_ULPI]    = "ulpi",
        [USBPHY_INTERFACE_MODE_SERIAL]  = "serial",
        [USBPHY_INTERFACE_MODE_HSIC]    = "hsic",
};

/**
 * of_usb_get_phy_mode - Get phy mode for given device_node
 * @np: Pointer to the given device_node
 *
 * The function gets phy interface string from property 'phy_type',
 * and returns the corresponding enum usb_phy_interface
 */
enum usb_phy_interface of_usb_get_phy_mode(struct device_node *np)
{
        const char *phy_type;
        int err, i;

        err = of_property_read_string(np, "phy_type", &phy_type);
        if (err < 0)
                return USBPHY_INTERFACE_MODE_UNKNOWN;

        for (i = 0; i < ARRAY_SIZE(usbphy_modes); i++)
                if (!strcmp(phy_type, usbphy_modes[i]))
                        return i;

        return USBPHY_INTERFACE_MODE_UNKNOWN;
}
EXPORT_SYMBOL_GPL(of_usb_get_phy_mode);