drivers/gpio/gpio_mcp23s17.c - third_party/github/zephyrproject-rtos/zephyr - Git at Google

 /*
  * Copyright (c) 2020 Geanix ApS
  *
  * SPDX-License-Identifier: Apache-2.0
  */

 #define DT_DRV_COMPAT microchip_mcp23s17

 /**
  * @file Driver for MCP23S17 SPI-based GPIO driver.
  */

 #include <errno.h>

 #include <zephyr/kernel.h>
 #include <zephyr/device.h>
 #include <zephyr/init.h>
 #include <zephyr/sys/byteorder.h>
 #include <zephyr/drivers/gpio.h>
 #include <zephyr/drivers/spi.h>

 #include <zephyr/drivers/gpio/gpio_utils.h>
 #include "gpio_mcp23s17.h"

 #define LOG_LEVEL CONFIG_GPIO_LOG_LEVEL
 #include <zephyr/logging/log.h>
 LOG_MODULE_REGISTER(gpio_mcp23s17);

 /**
  * @brief Read both port 0 and port 1 registers of certain register function.
  *
  * Given the register in reg, read the pair of port 0 and port 1.
  *
  * @param dev Device struct of the MCP23S17.
  * @param reg Register to read (the PORTA of the pair of registers).
  * @param buf Buffer to read data into.
  *
  * @return 0 if successful, failed otherwise.
  */
 static int read_port_regs(const struct device *dev, uint8_t reg,
 			  uint16_t *buf)
 {
 	const struct mcp23s17_config *config = dev->config;
 	int ret;
 	uint16_t port_data;

 	uint8_t addr = MCP23S17_ADDR | MCP23S17_READBIT;
 	uint8_t buffer_tx[4] = { addr, reg, 0, 0 };

 	const struct spi_buf tx_buf = {
 		.buf = buffer_tx,
 		.len = 4,
 	};
 	const struct spi_buf_set tx = {
 		.buffers = &tx_buf,
 		.count = 1,
 	};
 	const struct spi_buf rx_buf[2] = {
 		{
 			.buf = NULL,
 			.len = 2
 		},
 		{
 			.buf = (uint8_t *)&port_data,
 			.len = 2
 		}
 	};
 	const struct spi_buf_set rx = {
 		.buffers = rx_buf,
 		.count = ARRAY_SIZE(rx_buf),
 	};

 	ret = spi_transceive_dt(&config->bus, &tx, &rx);
 	if (ret) {
 		LOG_DBG("spi_transceive FAIL %d\n", ret);
 		return ret;
 	}

 	*buf = sys_le16_to_cpu(port_data);

 	LOG_DBG("MCP23S17: Read: REG[0x%X] = 0x%X, REG[0x%X] = 0x%X",
 		reg, (*buf & 0xFF), (reg + 1), (*buf >> 8));

 	return 0;
 }

 /**
  * @brief Write both port 0 and port 1 registers of certain register function.
  *
  * Given the register in reg, write the pair of port 0 and port 1.
  *
  * @param dev Device struct of the MCP23S17.
  * @param reg Register to write into (the PORTA of the pair of registers).
  * @param buf Buffer to write data from.
  *
  * @return 0 if successful, failed otherwise.
  */
 static int write_port_regs(const struct device *dev, uint8_t reg,
 			   uint16_t value)
 {
 	const struct mcp23s17_config *config = dev->config;
 	int ret;
 	uint16_t port_data;

 	LOG_DBG("MCP23S17: Write: REG[0x%X] = 0x%X, REG[0x%X] = 0x%X",
 		reg, (value & 0xFF), (reg + 1), (value >> 8));

 	port_data = sys_cpu_to_le16(value);

 	uint8_t addr = MCP23S17_ADDR;
 	uint8_t buffer_tx[2] = { addr, reg };

 	const struct spi_buf tx_buf[2] = {
 		{
 			.buf = buffer_tx,
 			.len = 2,
 		},
 		{
 			.buf = (uint8_t *)&port_data,
 			.len = 2,
 		}
 	};
 	const struct spi_buf_set tx = {
 		.buffers = tx_buf,
 		.count = ARRAY_SIZE(tx_buf),
 	};

 	ret = spi_write_dt(&config->bus, &tx);
 	if (ret) {
 		LOG_DBG("spi_write FAIL %d\n", ret);
 		return ret;
 	}

 	return 0;
 }

 /**
  * @brief Setup the pin direction (input or output)
  *
  * @param dev Device struct of the MCP23S17
  * @param pin The pin number
  * @param flags Flags of pin or port
  *
  * @return 0 if successful, failed otherwise
  */
 static int setup_pin_dir(const struct device *dev, uint32_t pin, int flags)
 {
 	struct mcp23s17_drv_data *drv_data = dev->data;
 	uint16_t *dir = &drv_data->reg_cache.iodir;
 	uint16_t *output = &drv_data->reg_cache.gpio;
 	int ret;

 	if ((flags & GPIO_OUTPUT) != 0U) {
 		if ((flags & GPIO_OUTPUT_INIT_HIGH) != 0U) {
 			*output |= BIT(pin);
 		} else if ((flags & GPIO_OUTPUT_INIT_LOW) != 0U) {
 			*output &= ~BIT(pin);
 		}
 		*dir &= ~BIT(pin);
 	} else {
 		*dir |= BIT(pin);
 	}

 	ret = write_port_regs(dev, REG_GPIO_PORTA, *output);
 	if (ret != 0) {
 		return ret;
 	}

 	ret = write_port_regs(dev, REG_IODIR_PORTA, *dir);

 	return ret;
 }

 /**
  * @brief Setup the pin pull up/pull down status
  *
  * @param dev Device struct of the MCP23S17
  * @param pin The pin number
  * @param flags Flags of pin or port
  *
  * @return 0 if successful, failed otherwise
  */
 static int setup_pin_pullupdown(const struct device *dev, uint32_t pin,
 				int flags)
 {
 	struct mcp23s17_drv_data *drv_data = dev->data;
 	uint16_t port;
 	int ret;

 	/* Setup pin pull up or pull down */
 	port = drv_data->reg_cache.gppu;

 	/* pull down == 0, pull up == 1 */
 	if ((flags & GPIO_PULL_DOWN) != 0U) {
 		return -ENOTSUP;
 	}

 	WRITE_BIT(port, pin, (flags & GPIO_PULL_UP) != 0U);

 	ret = write_port_regs(dev, REG_GPPU_PORTA, port);
 	if (ret == 0) {
 		drv_data->reg_cache.gppu = port;
 	}

 	return ret;
 }

 static int mcp23s17_config(const struct device *dev,
 			   gpio_pin_t pin, gpio_flags_t flags)
 {
 	struct mcp23s17_drv_data *drv_data = dev->data;
 	int ret;

 	/* Can't do SPI bus operations from an ISR */
 	if (k_is_in_isr()) {
 		return -EWOULDBLOCK;
 	}

 	k_sem_take(&drv_data->lock, K_FOREVER);

 	if ((flags & GPIO_OPEN_DRAIN) != 0U) {
 		ret = -ENOTSUP;
 		goto done;
 	}

 	ret = setup_pin_dir(dev, pin, flags);
 	if (ret) {
 		LOG_ERR("MCP23S17: error setting pin direction (%d)", ret);
 		goto done;
 	}

 	ret = setup_pin_pullupdown(dev, pin, flags);
 	if (ret) {
 		LOG_ERR("MCP23S17: error setting pin pull up/down (%d)", ret);
 		goto done;
 	}

 done:
 	k_sem_give(&drv_data->lock);
 	return ret;
 }

 static int mcp23s17_port_get_raw(const struct device *dev, uint32_t *value)
 {
 	struct mcp23s17_drv_data *drv_data = dev->data;
 	uint16_t buf;
 	int ret;

 	/* Can't do SPI bus operations from an ISR */
 	if (k_is_in_isr()) {
 		return -EWOULDBLOCK;
 	}

 	k_sem_take(&drv_data->lock, K_FOREVER);

 	ret = read_port_regs(dev, REG_GPIO_PORTA, &buf);
 	if (ret != 0) {
 		goto done;
 	}

 	*value = buf;

 done:
 	k_sem_give(&drv_data->lock);
 	return ret;
 }

 static int mcp23s17_port_set_masked_raw(const struct device *dev,
 					uint32_t mask, uint32_t value)
 {
 	struct mcp23s17_drv_data *drv_data = dev->data;
 	uint16_t buf;
 	int ret;

 	/* Can't do SPI bus operations from an ISR */
 	if (k_is_in_isr()) {
 		return -EWOULDBLOCK;
 	}

 	k_sem_take(&drv_data->lock, K_FOREVER);

 	buf = drv_data->reg_cache.gpio;
 	buf = (buf & ~mask) | (mask & value);

 	ret = write_port_regs(dev, REG_GPIO_PORTA, buf);
 	if (ret == 0) {
 		drv_data->reg_cache.gpio = buf;
 	}

 	k_sem_give(&drv_data->lock);

 	return ret;
 }

 static int mcp23s17_port_set_bits_raw(const struct device *dev, uint32_t mask)
 {
 	return mcp23s17_port_set_masked_raw(dev, mask, mask);
 }

 static int mcp23s17_port_clear_bits_raw(const struct device *dev,
 					uint32_t mask)
 {
 	return mcp23s17_port_set_masked_raw(dev, mask, 0);
 }

 static int mcp23s17_port_toggle_bits(const struct device *dev, uint32_t mask)
 {
 	struct mcp23s17_drv_data *const drv_data =
 		(struct mcp23s17_drv_data *const)dev->data;
 	uint16_t buf;
 	int ret;

 	/* Can't do SPI bus operations from an ISR */
 	if (k_is_in_isr()) {
 		return -EWOULDBLOCK;
 	}

 	k_sem_take(&drv_data->lock, K_FOREVER);

 	buf = drv_data->reg_cache.gpio;
 	buf ^= mask;

 	ret = write_port_regs(dev, REG_GPIO_PORTA, buf);
 	if (ret == 0) {
 		drv_data->reg_cache.gpio = buf;
 	}

 	k_sem_give(&drv_data->lock);

 	return ret;
 }

 static int mcp23s17_pin_interrupt_configure(const struct device *dev,
 					    gpio_pin_t pin,
 					    enum gpio_int_mode mode,
 					    enum gpio_int_trig trig)
 {
 	return -ENOTSUP;
 }

 static const struct gpio_driver_api api_table = {
 	.pin_configure = mcp23s17_config,
 	.port_get_raw = mcp23s17_port_get_raw,
 	.port_set_masked_raw = mcp23s17_port_set_masked_raw,
 	.port_set_bits_raw = mcp23s17_port_set_bits_raw,
 	.port_clear_bits_raw = mcp23s17_port_clear_bits_raw,
 	.port_toggle_bits = mcp23s17_port_toggle_bits,
 	.pin_interrupt_configure = mcp23s17_pin_interrupt_configure,
 };

 /**
  * @brief Initialization function of MCP23S17
  *
  * @param dev Device struct
  * @return 0 if successful, failed otherwise.
  */
 static int mcp23s17_init(const struct device *dev)
 {
 	const struct mcp23s17_config *config = dev->config;
 	struct mcp23s17_drv_data *drv_data = dev->data;

 	if (!spi_is_ready_dt(&config->bus)) {
 		LOG_ERR("SPI bus %s not ready", config->bus.bus->name);
 		return -ENODEV;
 	}

 	k_sem_init(&drv_data->lock, 1, 1);

 	return 0;
 }

 #define MCP23S17_INIT(inst)						 \
 	static const struct mcp23s17_config mcp23s17_##inst##_config = { \
 		.common = {						 \
 			.port_pin_mask =				 \
 				GPIO_PORT_PIN_MASK_FROM_DT_INST(inst),	 \
 		},							 \
 		.bus = SPI_DT_SPEC_INST_GET(				 \
 			inst,						 \
 			SPI_OP_MODE_MASTER | SPI_MODE_CPOL |		 \
 			SPI_MODE_CPHA | SPI_WORD_SET(8), 0),		 \
 	};								 \
 									 \
 	static struct mcp23s17_drv_data mcp23s17_##inst##_drvdata = {	 \
 		/* Default for registers according to datasheet */	 \
 		.reg_cache.iodir = 0xFFFF,				 \
 		.reg_cache.ipol = 0x0,					 \
 		.reg_cache.gpinten = 0x0,				 \
 		.reg_cache.defval = 0x0,				 \
 		.reg_cache.intcon = 0x0,				 \
 		.reg_cache.iocon = 0x0,					 \
 		.reg_cache.gppu = 0x0,					 \
 		.reg_cache.intf = 0x0,					 \
 		.reg_cache.intcap = 0x0,				 \
 		.reg_cache.gpio = 0x0,					 \
 		.reg_cache.olat = 0x0,					 \
 	};								 \
 									 \
 	/* This has to init after SPI master */				 \
 	DEVICE_DT_INST_DEFINE(inst, mcp23s17_init,			 \
 			      NULL,					 \
 			      &mcp23s17_##inst##_drvdata,		 \
 			      &mcp23s17_##inst##_config,		 \
 			      POST_KERNEL,				 \
 			      CONFIG_GPIO_MCP23S17_INIT_PRIORITY,	 \
 			      &api_table);

 DT_INST_FOREACH_STATUS_OKAY(MCP23S17_INIT)
	/*
	* Copyright (c) 2020 Geanix ApS
	*
	* SPDX-License-Identifier: Apache-2.0
	*/

	#define DT_DRV_COMPAT microchip_mcp23s17

	/**
	* @file Driver for MCP23S17 SPI-based GPIO driver.
	*/

	#include <errno.h>

	#include <zephyr/kernel.h>
	#include <zephyr/device.h>
	#include <zephyr/init.h>
	#include <zephyr/sys/byteorder.h>
	#include <zephyr/drivers/gpio.h>
	#include <zephyr/drivers/spi.h>

	#include <zephyr/drivers/gpio/gpio_utils.h>
	#include "gpio_mcp23s17.h"

	#define LOG_LEVEL CONFIG_GPIO_LOG_LEVEL
	#include <zephyr/logging/log.h>
	LOG_MODULE_REGISTER(gpio_mcp23s17);

	/**
	* @brief Read both port 0 and port 1 registers of certain register function.
	*
	* Given the register in reg, read the pair of port 0 and port 1.
	*
	* @param dev Device struct of the MCP23S17.
	* @param reg Register to read (the PORTA of the pair of registers).
	* @param buf Buffer to read data into.
	*
	* @return 0 if successful, failed otherwise.
	*/
	static int read_port_regs(const struct device *dev, uint8_t reg,
	uint16_t *buf)
	{
	const struct mcp23s17_config *config = dev->config;
	int ret;
	uint16_t port_data;

	uint8_t addr = MCP23S17_ADDR \| MCP23S17_READBIT;
	uint8_t buffer_tx[4] = { addr, reg, 0, 0 };

	const struct spi_buf tx_buf = {
	.buf = buffer_tx,
	.len = 4,
	};
	const struct spi_buf_set tx = {
	.buffers = &tx_buf,
	.count = 1,
	};
	const struct spi_buf rx_buf[2] = {
	{
	.buf = NULL,
	.len = 2
	},
	{
	.buf = (uint8_t *)&port_data,
	.len = 2
	}
	};
	const struct spi_buf_set rx = {
	.buffers = rx_buf,
	.count = ARRAY_SIZE(rx_buf),
	};

	ret = spi_transceive_dt(&config->bus, &tx, &rx);
	if (ret) {
	LOG_DBG("spi_transceive FAIL %d\n", ret);
	return ret;
	}

	*buf = sys_le16_to_cpu(port_data);

	LOG_DBG("MCP23S17: Read: REG[0x%X] = 0x%X, REG[0x%X] = 0x%X",
	reg, (buf & 0xFF), (reg + 1), (buf >> 8));

	return 0;
	}

	/**
	* @brief Write both port 0 and port 1 registers of certain register function.
	*
	* Given the register in reg, write the pair of port 0 and port 1.
	*
	* @param dev Device struct of the MCP23S17.
	* @param reg Register to write into (the PORTA of the pair of registers).
	* @param buf Buffer to write data from.
	*
	* @return 0 if successful, failed otherwise.
	*/
	static int write_port_regs(const struct device *dev, uint8_t reg,
	uint16_t value)
	{
	const struct mcp23s17_config *config = dev->config;
	int ret;
	uint16_t port_data;

	LOG_DBG("MCP23S17: Write: REG[0x%X] = 0x%X, REG[0x%X] = 0x%X",
	reg, (value & 0xFF), (reg + 1), (value >> 8));

	port_data = sys_cpu_to_le16(value);

	uint8_t addr = MCP23S17_ADDR;
	uint8_t buffer_tx[2] = { addr, reg };

	const struct spi_buf tx_buf[2] = {
	{
	.buf = buffer_tx,
	.len = 2,
	},
	{
	.buf = (uint8_t *)&port_data,
	.len = 2,
	}
	};
	const struct spi_buf_set tx = {
	.buffers = tx_buf,
	.count = ARRAY_SIZE(tx_buf),
	};

	ret = spi_write_dt(&config->bus, &tx);
	if (ret) {
	LOG_DBG("spi_write FAIL %d\n", ret);
	return ret;
	}

	return 0;
	}

	/**
	* @brief Setup the pin direction (input or output)
	*
	* @param dev Device struct of the MCP23S17
	* @param pin The pin number
	* @param flags Flags of pin or port
	*
	* @return 0 if successful, failed otherwise
	*/
	static int setup_pin_dir(const struct device *dev, uint32_t pin, int flags)
	{
	struct mcp23s17_drv_data *drv_data = dev->data;
	uint16_t *dir = &drv_data->reg_cache.iodir;
	uint16_t *output = &drv_data->reg_cache.gpio;
	int ret;

	if ((flags & GPIO_OUTPUT) != 0U) {
	if ((flags & GPIO_OUTPUT_INIT_HIGH) != 0U) {
	*output \|= BIT(pin);
	} else if ((flags & GPIO_OUTPUT_INIT_LOW) != 0U) {
	*output &= ~BIT(pin);
	}
	*dir &= ~BIT(pin);
	} else {
	*dir \|= BIT(pin);
	}

	ret = write_port_regs(dev, REG_GPIO_PORTA, *output);
	if (ret != 0) {
	return ret;
	}

	ret = write_port_regs(dev, REG_IODIR_PORTA, *dir);

	return ret;
	}

	/**
	* @brief Setup the pin pull up/pull down status
	*
	* @param dev Device struct of the MCP23S17
	* @param pin The pin number
	* @param flags Flags of pin or port
	*
	* @return 0 if successful, failed otherwise
	*/
	static int setup_pin_pullupdown(const struct device *dev, uint32_t pin,
	int flags)
	{
	struct mcp23s17_drv_data *drv_data = dev->data;
	uint16_t port;
	int ret;

	/* Setup pin pull up or pull down */
	port = drv_data->reg_cache.gppu;

	/* pull down == 0, pull up == 1 */
	if ((flags & GPIO_PULL_DOWN) != 0U) {
	return -ENOTSUP;
	}

	WRITE_BIT(port, pin, (flags & GPIO_PULL_UP) != 0U);

	ret = write_port_regs(dev, REG_GPPU_PORTA, port);
	if (ret == 0) {
	drv_data->reg_cache.gppu = port;
	}

	return ret;
	}

	static int mcp23s17_config(const struct device *dev,
	gpio_pin_t pin, gpio_flags_t flags)
	{
	struct mcp23s17_drv_data *drv_data = dev->data;
	int ret;

	/* Can't do SPI bus operations from an ISR */
	if (k_is_in_isr()) {
	return -EWOULDBLOCK;
	}

	k_sem_take(&drv_data->lock, K_FOREVER);

	if ((flags & GPIO_OPEN_DRAIN) != 0U) {
	ret = -ENOTSUP;
	goto done;
	}

	ret = setup_pin_dir(dev, pin, flags);
	if (ret) {
	LOG_ERR("MCP23S17: error setting pin direction (%d)", ret);
	goto done;
	}

	ret = setup_pin_pullupdown(dev, pin, flags);
	if (ret) {
	LOG_ERR("MCP23S17: error setting pin pull up/down (%d)", ret);
	goto done;
	}

	done:
	k_sem_give(&drv_data->lock);
	return ret;
	}

	static int mcp23s17_port_get_raw(const struct device dev, uint32_t value)
	{
	struct mcp23s17_drv_data *drv_data = dev->data;
	uint16_t buf;
	int ret;

	/* Can't do SPI bus operations from an ISR */
	if (k_is_in_isr()) {
	return -EWOULDBLOCK;
	}

	k_sem_take(&drv_data->lock, K_FOREVER);

	ret = read_port_regs(dev, REG_GPIO_PORTA, &buf);
	if (ret != 0) {
	goto done;
	}

	*value = buf;

	done:
	k_sem_give(&drv_data->lock);
	return ret;
	}

	static int mcp23s17_port_set_masked_raw(const struct device *dev,
	uint32_t mask, uint32_t value)
	{
	struct mcp23s17_drv_data *drv_data = dev->data;
	uint16_t buf;
	int ret;

	/* Can't do SPI bus operations from an ISR */
	if (k_is_in_isr()) {
	return -EWOULDBLOCK;
	}

	k_sem_take(&drv_data->lock, K_FOREVER);

	buf = drv_data->reg_cache.gpio;
	buf = (buf & ~mask) \| (mask & value);

	ret = write_port_regs(dev, REG_GPIO_PORTA, buf);
	if (ret == 0) {
	drv_data->reg_cache.gpio = buf;
	}

	k_sem_give(&drv_data->lock);

	return ret;
	}

	static int mcp23s17_port_set_bits_raw(const struct device *dev, uint32_t mask)
	{
	return mcp23s17_port_set_masked_raw(dev, mask, mask);
	}

	static int mcp23s17_port_clear_bits_raw(const struct device *dev,
	uint32_t mask)
	{
	return mcp23s17_port_set_masked_raw(dev, mask, 0);
	}

	static int mcp23s17_port_toggle_bits(const struct device *dev, uint32_t mask)
	{
	struct mcp23s17_drv_data *const drv_data =
	(struct mcp23s17_drv_data *const)dev->data;
	uint16_t buf;
	int ret;

	/* Can't do SPI bus operations from an ISR */
	if (k_is_in_isr()) {
	return -EWOULDBLOCK;
	}

	k_sem_take(&drv_data->lock, K_FOREVER);

	buf = drv_data->reg_cache.gpio;
	buf ^= mask;

	ret = write_port_regs(dev, REG_GPIO_PORTA, buf);
	if (ret == 0) {
	drv_data->reg_cache.gpio = buf;
	}

	k_sem_give(&drv_data->lock);

	return ret;
	}

	static int mcp23s17_pin_interrupt_configure(const struct device *dev,
	gpio_pin_t pin,
	enum gpio_int_mode mode,
	enum gpio_int_trig trig)
	{
	return -ENOTSUP;
	}

	static const struct gpio_driver_api api_table = {
	.pin_configure = mcp23s17_config,
	.port_get_raw = mcp23s17_port_get_raw,
	.port_set_masked_raw = mcp23s17_port_set_masked_raw,
	.port_set_bits_raw = mcp23s17_port_set_bits_raw,
	.port_clear_bits_raw = mcp23s17_port_clear_bits_raw,
	.port_toggle_bits = mcp23s17_port_toggle_bits,
	.pin_interrupt_configure = mcp23s17_pin_interrupt_configure,
	};

	/**
	* @brief Initialization function of MCP23S17
	*
	* @param dev Device struct
	* @return 0 if successful, failed otherwise.
	*/
	static int mcp23s17_init(const struct device *dev)
	{
	const struct mcp23s17_config *config = dev->config;
	struct mcp23s17_drv_data *drv_data = dev->data;

	if (!spi_is_ready_dt(&config->bus)) {
	LOG_ERR("SPI bus %s not ready", config->bus.bus->name);
	return -ENODEV;
	}

	k_sem_init(&drv_data->lock, 1, 1);

	return 0;
	}

	#define MCP23S17_INIT(inst) \
	static const struct mcp23s17_config mcp23s17_##inst##_config = { \
	.common = { \
	.port_pin_mask = \
	GPIO_PORT_PIN_MASK_FROM_DT_INST(inst), \
	}, \
	.bus = SPI_DT_SPEC_INST_GET( \
	inst, \
	SPI_OP_MODE_MASTER \| SPI_MODE_CPOL \| \
	SPI_MODE_CPHA \| SPI_WORD_SET(8), 0), \
	}; \
	\
	static struct mcp23s17_drv_data mcp23s17_##inst##_drvdata = { \
	/* Default for registers according to datasheet */ \
	.reg_cache.iodir = 0xFFFF, \
	.reg_cache.ipol = 0x0, \
	.reg_cache.gpinten = 0x0, \
	.reg_cache.defval = 0x0, \
	.reg_cache.intcon = 0x0, \
	.reg_cache.iocon = 0x0, \
	.reg_cache.gppu = 0x0, \
	.reg_cache.intf = 0x0, \
	.reg_cache.intcap = 0x0, \
	.reg_cache.gpio = 0x0, \
	.reg_cache.olat = 0x0, \
	}; \
	\
	/* This has to init after SPI master */ \
	DEVICE_DT_INST_DEFINE(inst, mcp23s17_init, \
	NULL, \
	&mcp23s17_##inst##_drvdata, \
	&mcp23s17_##inst##_config, \
	POST_KERNEL, \
	CONFIG_GPIO_MCP23S17_INIT_PRIORITY, \
	&api_table);

	DT_INST_FOREACH_STATUS_OKAY(MCP23S17_INIT)