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