zmk_mf68/app/drivers/gpio/gpio_mcp23017.h
Pete Johanson 647110e5e5 feat(drivers): Add mcp23017 driver based on upstream mcp23s17 one.
* Upstream Zephyr has in progress driver, so doing this locally here,
  until we can move over to that driver.
2021-09-14 20:48:28 -04:00

86 lines
1.8 KiB
C

/*
* Copyright (c) 2020 Geanix ApS, Pete Johanson
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @file Header file for the MCP23017 driver.
*/
#ifndef ZEPHYR_DRIVERS_GPIO_GPIO_MCP23017_H_
#define ZEPHYR_DRIVERS_GPIO_GPIO_MCP23017_H_
#include <kernel.h>
#include <drivers/gpio.h>
#include <drivers/i2c.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 MCP23017_ADDR 0x40
#define MCP23017_READBIT 0x01
/** Configuration data */
struct mcp23017_config {
/* gpio_driver_data needs to be first */
struct gpio_driver_config common;
const char *const i2c_dev_name;
const uint16_t slave;
};
/** Runtime driver data */
struct mcp23017_drv_data {
/* gpio_driver_data needs to be first */
struct gpio_driver_config data;
/** Master SPI device */
const struct device *i2c;
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_MCP23017_H_ */