nuttx/arch/arm/src/imxrt/imxrt_lpi2c.h

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/****************************************************************************
* arch/arm/src/imxrt/imxrt_lpi2c.h
*
* Copyright (C) 2018 Gregory Nutt. All rights reserved.
* Author: Ivan Ucherdzhiev <ivanucherdjiev@gmail.com>
*
* 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.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* 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 OWNER 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 __ARCH_ARM_SRC_IMXRT_IMX_LPI2C_H
#define __ARCH_ARM_SRC_IMXRT_IMX_LPI2C_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/i2c/i2c_master.h>
#include "chip.h"
#include "hardware/imxrt_lpi2c.h"
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/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/****************************************************************************
* Name: imxrt_i2cbus_initialize
*
* Description:
* Initialize the selected I2C port. And return a unique instance of struct
* struct i2c_master_s. This function may be called to obtain multiple
* instances of the interface, each of which may be set up with a
* different frequency and slave address.
*
* Input Parameters:
* Port number (for hardware that has multiple I2C interfaces)
*
* Returned Value:
* Valid I2C device structure reference on success; a NULL on failure
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*
****************************************************************************/
FAR struct i2c_master_s *imxrt_i2cbus_initialize(int port);
/****************************************************************************
* Name: imxrt_i2cbus_uninitialize
*
* Description:
* De-initialize the selected I2C port, and power down the device.
*
* Input Parameters:
* Device structure as returned by the imxrt_i2cbus_initialize()
*
* Returned Value:
* OK on success, ERROR when internal reference count mismatch or dev
* points to invalid hardware device.
*
****************************************************************************/
int imxrt_i2cbus_uninitialize(FAR struct i2c_master_s *dev);
#endif /* __ARCH_ARM_SRC_IMXRT_IMX_LPI2C_H */