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/* Copyright 2013-2014 Google Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @file gpio.h
*
* @brief Public interface of the EC GPIO device driver
*
*/
#ifndef __EC_GPIO_H_
#define __EC_GPIO_H_
#ifdef __cplusplus
extern "C" {
#endif
#define EC_GPIO_INPUT 0
#define EC_GPIO_OUTPUT 1
#define EC_GPIO_PULLUP_DISABLE 0
#define EC_GPIO_PULLUP_ENABLE 1
// Sets up a GPIO as output or input.
// Returns: <0 on error
int ec_gpio_setup(EcGpioPort port, uint8_t pin,
int is_output, int pullup_enable);
// Reads the current value of an input GPIO.
// Returns: GPIO value (0,1) or <0 on error.
int ec_gpio_read(EcGpioPort port, uint8_t pin);
// Sets the driving value of an output GPIO. Port should already be set
// to output mode.
// Returns: <0 on error
int ec_gpio_set(EcGpioPort port, uint8_t pin, int val);
#ifdef __cplusplus
}
#endif
#endif // __EC_GPIO_H_
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