kernel-ark/include/linux/usb/gpio_vbus.h
Shinya Kuribayashi 7cbb062ade USB: gpio_vbus: wakeup support on GPIO VBUS interrupts
We'd like to see the system waking up from the system-wide suspend
when it gets plugged-in, or the USB cable is pulled out.

Also makes it configurable via platform data 'wakeup'.

Signed-off-by: Shinya Kuribayashi <shinya.kuribayashi.px@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-17 11:20:34 -07:00

33 lines
1.1 KiB
C

/*
* 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;
};