LXR linux/include/linux/usb/gpio

   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 */
  27struct 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};
  34