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/*
* Copyright (c) 2016, Linaro Limited
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __GPIO_H__
#define __GPIO_H__
enum gpio_dir {
GPIO_DIR_OUT,
GPIO_DIR_IN
};
enum gpio_level {
GPIO_LEVEL_LOW,
GPIO_LEVEL_HIGH
};
enum gpio_interrupt {
GPIO_INTERRUPT_DISABLE,
GPIO_INTERRUPT_ENABLE
};
struct gpio_chip {
const struct gpio_ops *ops;
};
struct gpio_ops {
enum gpio_dir (*get_direction)(unsigned int gpio_pin);
void (*set_direction)(unsigned int gpio_pin, enum gpio_dir direction);
enum gpio_level (*get_value)(unsigned int gpio_pin);
void (*set_value)(unsigned int gpio_pin, enum gpio_level value);
enum gpio_interrupt (*get_interrupt)(unsigned int gpio_pin);
void (*set_interrupt)(unsigned int gpio_pin,
enum gpio_interrupt ena_dis);
};
#endif /* __GPIO_H__ */
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