blob: 2827822e691eae7d7684428737b6619d268663c9 [file] [log] [blame]
/*
* Copyright (c) 2020 Geanix ApS
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @file Header file for the MCP23S17 driver.
*/
#ifndef ZEPHYR_DRIVERS_GPIO_GPIO_MCP23S17_H_
#define ZEPHYR_DRIVERS_GPIO_GPIO_MCP23S17_H_
#include <kernel.h>
#include <drivers/gpio.h>
#include <drivers/spi.h>
#ifdef __cplusplus
extern "C" {
#endif
/* Register definitions */
#define REG_IODIR_PORTA 0x00
#define REG_IODIR_PORTB 0x01
#define REG_IPOL_PORTA 0x02
#define REG_IPOL_PORTB 0x03
#define REG_GPINTEN_PORTA 0x04
#define REG_GPINTEN_PORTB 0x05
#define REG_DEFVAL_PORTA 0x06
#define REG_DEFVAL_PORTB 0x07
#define REG_INTCON_PORTA 0x08
#define REG_INTCON_PORTB 0x09
#define REG_GPPU_PORTA 0x0C
#define REG_GPPU_PORTB 0x0D
#define REG_INTF_PORTA 0x0E
#define REG_INTF_PORTB 0x0F
#define REG_INTCAP_PORTA 0x10
#define REG_INTCAP_PORTB 0x11
#define REG_GPIO_PORTA 0x12
#define REG_GPIO_PORTB 0x13
#define REG_OLAT_PORTA 0x14
#define REG_OLAT_PORTB 0x15
#define MCP23S17_ADDR 0x40
#define MCP23S17_READBIT 0x01
/** Configuration data */
struct mcp23s17_config {
/* gpio_driver_data needs to be first */
struct gpio_driver_config common;
const char *const spi_dev_name;
const uint16_t slave;
const uint32_t freq;
const char *const cs_dev;
const uint32_t cs_pin;
const uint8_t cs_flags;
};
/** Runtime driver data */
struct mcp23s17_drv_data {
/* gpio_driver_data needs to be first */
struct gpio_driver_config data;
/** Master SPI device */
const struct device *spi;
struct spi_config spi_cfg;
struct spi_cs_control mcp23s17_cs_ctrl;
struct k_sem lock;
struct {
uint16_t iodir;
uint16_t ipol;
uint16_t gpinten;
uint16_t defval;
uint16_t intcon;
uint16_t iocon;
uint16_t gppu;
uint16_t intf;
uint16_t intcap;
uint16_t gpio;
uint16_t olat;
} reg_cache;
};
#ifdef __cplusplus
}
#endif
#endif /* ZEPHYR_DRIVERS_GPIO_GPIO_MCP23S17_H_ */