91 lines
2.0 KiB
C
91 lines
2.0 KiB
C
/*
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* Copyright (c) 2021 metraTec GmbH
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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 MCP23Xxx driver.
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*/
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#ifndef ZEPHYR_DRIVERS_GPIO_GPIO_MCP23XXX_H_
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#define ZEPHYR_DRIVERS_GPIO_GPIO_MCP23XXX_H_
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#include <kernel.h>
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#include <drivers/gpio.h>
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#ifdef CONFIG_GPIO_MCP230XX
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#include <drivers/i2c.h>
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#endif /* CONFIG_GPIO_MCP230XX */
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#ifdef CONFIG_GPIO_MCP23SXX
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#include <drivers/spi.h>
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#endif /* CONFIG_GPIO_MCP23SXX */
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/* Register definitions */
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#define REG_IODIR 0x00
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#define REG_IPOL 0x01
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#define REG_GPINTEN 0x02
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#define REG_DEFVAL 0x03
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#define REG_INTCON 0x04
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#define REG_IOCON 0x05
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#define REG_GPPU 0x06
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#define REG_INTF 0x07
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#define REG_INTCAP 0x08
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#define REG_GPIO 0x09
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#define REG_IKAT 0x0A
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#define MCP23SXX_ADDR 0x40
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#define MCP23SXX_READBIT 0x01
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typedef int (*mcp23xxx_read_port_regs)(const struct device *dev, uint8_t reg, uint16_t *buf);
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typedef int (*mcp23xxx_write_port_regs)(const struct device *dev, uint8_t reg, uint16_t value);
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typedef int (*mcp23xxx_bus_is_ready)(const struct device *dev);
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/** Configuration data */
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struct mcp23xxx_config {
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/* gpio_driver_config needs to be first */
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struct gpio_driver_config config;
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/** I2C device */
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union {
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#ifdef CONFIG_GPIO_MCP230XX
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struct i2c_dt_spec i2c;
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#endif /* CONFIG_GPIO_MCP230XX */
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#ifdef CONFIG_GPIO_MCP23SXX
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struct spi_dt_spec spi;
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#endif /* CONFIG_GPIO_MCP23SXX */
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} bus;
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uint8_t ngpios;
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mcp23xxx_read_port_regs read_fn;
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mcp23xxx_write_port_regs write_fn;
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mcp23xxx_bus_is_ready bus_fn;
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};
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/** Runtime driver data */
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struct mcp23xxx_drv_data {
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/* gpio_driver_data needs to be first */
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struct gpio_driver_data data;
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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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extern const struct gpio_driver_api gpio_mcp23xxx_api_table;
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int gpio_mcp23xxx_init(const struct device *dev);
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#endif /* ZEPHYR_DRIVERS_GPIO_GPIO_MCP23XXX_H_ */
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