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kernel/linux-rt-4.4.41/include/linux/usb/gpio_vbus.h 1.09 KB
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  /*
   * A simple GPIO VBUS sensing driver for B peripheral only devices
   * with internal transceivers.
   * Optionally D+ pullup can be controlled by a second GPIO.
   *
   * Copyright (c) 2008 Philipp Zabel <philipp.zabel@gmail.com>
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
   *
   */
  
  /**
   * struct gpio_vbus_mach_info - configuration for gpio_vbus
   * @gpio_vbus: VBUS sensing GPIO
   * @gpio_pullup: optional D+ or D- pullup GPIO (else negative/invalid)
   * @gpio_vbus_inverted: true if gpio_vbus is active low
   * @gpio_pullup_inverted: true if gpio_pullup is active low
   * @wakeup: configure gpio_vbus as a wake-up source
   *
   * The VBUS sensing GPIO should have a pulldown, which will normally be
   * part of a resistor ladder turning a 4.0V-5.25V level on VBUS into a
   * value the GPIO detects as active.  Some systems will use comparators.
   */
  struct gpio_vbus_mach_info {
  	int gpio_vbus;
  	int gpio_pullup;
  	bool gpio_vbus_inverted;
  	bool gpio_pullup_inverted;
  	bool wakeup;
  };