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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2018 Siemens AG
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef _I2C_PCA9538_H_
#define _I2C_PCA9538_H_
#include <types.h>
#include <device/device.h>
/* Register layout */
#define INPUT_REG 0x00
#define OUTPUT_REG 0x01
#define INPUT_INVERT_REG 0x02
#define IO_CONFIG_REG 0x03
/* Provide some functions to read input and write output values. */
uint8_t pca9538_read_input(void);
void pca9538_set_output(uint8_t val);
/*
* Provide a way to get the right device structure for the I/O expander.
* The user of this driver has to provide this function if read/write of I/O
* values on the I/O expander is needed.
*/
struct device *pca9538_get_dev(void);
#endif /* _I2C_PCA9538_H_ */
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