| Philipp Zabel | 6084f1b | 2008-11-24 12:00:01 -0800 | [diff] [blame] | 1 | /* |
| 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. |
| 5 | * |
| 6 | * Copyright (c) 2008 Philipp Zabel <philipp.zabel@gmail.com> |
| 7 | * |
| 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. |
| 11 | * |
| 12 | */ |
| 13 | |
| 14 | /** |
| 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 |
| 20 | * |
| 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. |
| 24 | */ |
| 25 | struct gpio_vbus_mach_info { |
| 26 | int gpio_vbus; |
| 27 | int gpio_pullup; |
| 28 | bool gpio_vbus_inverted; |
| 29 | bool gpio_pullup_inverted; |
| 30 | }; |