| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* This file is part of the coreboot project. */ |
| |
| #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_ */ |