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