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/* Copyright 2020 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef __CROS_EC_IOEXPANDER_TCA6424A_H
#define __CROS_EC_IOEXPANDER_TCA6424A_H
#include <stdint.h>
#define TCA6424A_ADDR_FLAGS 0x23
enum tca6424a_bank {
TCA6424A_IN_PORT_0 = 0x0,
TCA6424A_IN_PORT_1 = 0x1,
TCA6424A_IN_PORT_2 = 0x2,
TCA6424A_OUT_PORT_0 = 0x4,
TCA6424A_OUT_PORT_1 = 0x5,
TCA6424A_OUT_PORT_2 = 0x6,
TCA6424A_DIR_PORT_0 = 0xc,
TCA6424A_DIR_PORT_1 = 0xd,
TCA6424A_DIR_PORT_2 = 0xe,
};
/*
* Set a bit in the supplied bank
*
* @param port The I2C port of TCA6424A.
* @param bank The bank the bit belongs to.
* @param bit The index of the bit to set.
* @param val The value to set.
*
* @return EC_SUCCESS, or EC_ERROR_* on error.
*/
int tca6424a_write_bit(int port,
enum tca6424a_bank bank, uint8_t bit, int val);
/*
* Get a bit in the supplied bank
*
* @param port The I2C port of TCA6424A.
* @param bank The bank the bit belongs to.
* @param bit The index of the bit to get.
*
* @return bit value, or -1 on error.
*/
int tca6424a_read_bit(int port, enum tca6424a_bank bank, uint8_t bit);
/*
* Write a byt to the supplied bank
*
* @param port The I2C port of TCA6424A.
* @param bank The bank to write the byte to.
*
* @return EC_SUCCESS, or EC_ERROR_* on error.
*/
int tca6424a_write_byte(int port, enum tca6424a_bank bank, uint8_t val);
/*
* Read a byte in the supplied bank
*
* @param port The I2C port of TCA6424A.
* @param bank The bank to read byte from.
*
* @return byte value, or -1 on error.
*/
int tca6424a_read_byte(int port, enum tca6424a_bank bank);
#endif /* __CROS_EC_IOEXPANDER_TCA6424A_H */
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