include/linux/usb/gpio_vbus.h

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * A simple GPIO VBUS sensing driver for B peripheral only devices
   4  * with internal transceivers.
   5  * Optionally D+ pullup can be controlled by a second GPIO.
   6  *
   7  * Copyright (c) 2008 Philipp Zabel <philipp.zabel@gmail.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  */
  14
  15 /**
  16  * struct gpio_vbus_mach_info - configuration for gpio_vbus
  17  * @gpio_vbus: VBUS sensing GPIO
  18  * @gpio_pullup: optional D+ or D- pullup GPIO (else negative/invalid)
  19  * @gpio_vbus_inverted: true if gpio_vbus is active low
  20  * @gpio_pullup_inverted: true if gpio_pullup is active low
  21  * @wakeup: configure gpio_vbus as a wake-up source
  22  *
  23  * The VBUS sensing GPIO should have a pulldown, which will normally be
  24  * part of a resistor ladder turning a 4.0V-5.25V level on VBUS into a
  25  * value the GPIO detects as active.  Some systems will use comparators.
  26  */
  27 struct gpio_vbus_mach_info {
  28         int gpio_vbus;
  29         int gpio_pullup;
  30         bool gpio_vbus_inverted;
  31         bool gpio_pullup_inverted;
  32         bool wakeup;
  33 };