| /* |
| * 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_ */ |
