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48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
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/*
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* USB of helper code
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/usb/of.h>
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#include <linux/usb/otg.h>
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static const char *const usbphy_modes[] = {
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[USBPHY_INTERFACE_MODE_UNKNOWN] = "",
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[USBPHY_INTERFACE_MODE_UTMI] = "utmi",
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[USBPHY_INTERFACE_MODE_UTMIW] = "utmi_wide",
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[USBPHY_INTERFACE_MODE_ULPI] = "ulpi",
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[USBPHY_INTERFACE_MODE_SERIAL] = "serial",
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[USBPHY_INTERFACE_MODE_HSIC] = "hsic",
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};
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/**
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* of_usb_get_phy_mode - Get phy mode for given device_node
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* @np: Pointer to the given device_node
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*
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* The function gets phy interface string from property 'phy_type',
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* and returns the correspondig enum usb_phy_interface
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*/
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enum usb_phy_interface of_usb_get_phy_mode(struct device_node *np)
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{
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const char *phy_type;
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int err, i;
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err = of_property_read_string(np, "phy_type", &phy_type);
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if (err < 0)
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return USBPHY_INTERFACE_MODE_UNKNOWN;
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for (i = 0; i < ARRAY_SIZE(usbphy_modes); i++)
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if (!strcmp(phy_type, usbphy_modes[i]))
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return i;
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return USBPHY_INTERFACE_MODE_UNKNOWN;
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}
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EXPORT_SYMBOL_GPL(of_usb_get_phy_mode);
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