31 lines
1 KiB
C
31 lines
1 KiB
C
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/*
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* A simple GPIO VBUS sensing driver for B peripheral only devices
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* with internal transceivers.
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* Optionally D+ pullup can be controlled by a second GPIO.
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*
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* Copyright (c) 2008 Philipp Zabel <philipp.zabel@gmail.com>
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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 version 2 as
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* published by the Free Software Foundation.
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*
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*/
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/**
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* struct gpio_vbus_mach_info - configuration for gpio_vbus
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* @gpio_vbus: VBUS sensing GPIO
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* @gpio_pullup: optional D+ or D- pullup GPIO (else negative/invalid)
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* @gpio_vbus_inverted: true if gpio_vbus is active low
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* @gpio_pullup_inverted: true if gpio_pullup is active low
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*
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* The VBUS sensing GPIO should have a pulldown, which will normally be
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* part of a resistor ladder turning a 4.0V-5.25V level on VBUS into a
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* value the GPIO detects as active. Some systems will use comparators.
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*/
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struct gpio_vbus_mach_info {
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int gpio_vbus;
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int gpio_pullup;
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bool gpio_vbus_inverted;
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bool gpio_pullup_inverted;
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};
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