| rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2008, Google Inc. |
| 3 | * Copyright (c) 2012, Travis Geiselbrecht |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * * Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * * Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in |
| 13 | * the documentation and/or other materials provided with the |
| 14 | * distribution. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 19 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 20 | * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 22 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| 23 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| 24 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 25 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 26 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 27 | * SUCH DAMAGE. |
| 28 | */ |
| 29 | |
| 30 | #ifndef __DEV_GPIO_H |
| 31 | #define __DEV_GPIO_H |
| 32 | |
| 33 | enum gpio_flags { |
| 34 | GPIO_INPUT = (1 << 0), |
| 35 | GPIO_OUTPUT = (1 << 1), |
| 36 | GPIO_LEVEL = (1 << 2), |
| 37 | GPIO_EDGE = (1 << 3), |
| 38 | GPIO_RISING = (1 << 4), |
| 39 | GPIO_FALLING = (1 << 5), |
| 40 | GPIO_HIGH = (1 << 6), |
| 41 | GPIO_LOW = (1 << 7), |
| 42 | GPIO_PULLUP = (1 << 8), |
| 43 | GPIO_PULLDOWN = (1 << 9), |
| 44 | }; |
| 45 | |
| 46 | /* top 16 bits of the gpio flags are platform specific */ |
| 47 | #define GPIO_PLATFORM_MASK 0xffff0000 |
| 48 | |
| 49 | int gpio_config(unsigned nr, unsigned flags); |
| 50 | void gpio_set(unsigned nr, unsigned on); |
| 51 | int gpio_get(unsigned nr); |
| 52 | |
| 53 | #endif |