src/drivers/i2c/pca9538/pca9538.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #ifndef _I2C_PCA9538_H_
   4 #define _I2C_PCA9538_H_
   5
   6 #include <types.h>
   7 #include <device/device.h>
   8
   9 /* Register layout */
  10 #define INPUT_REG               0x00
  11 #define OUTPUT_REG              0x01
  12 #define INPUT_INVERT_REG        0x02
  13 #define IO_CONFIG_REG           0x03
  14
  15 /* Provide some functions to read input and write output values. */
  16 uint8_t pca9538_read_input(void);
  17 void pca9538_set_output(uint8_t val);
  18 /*
  19  * Provide a way to get the right device structure for the I/O expander.
  20  * The user of this driver has to provide this function if read/write of I/O
  21  * values on the I/O expander is needed.
  22  */
  23 struct device *pca9538_get_dev(void);
  24
  25 #endif /* _I2C_PCA9538_H_ */