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

 /*
  * Copyright (c) 2021, Nordic Semiconductor ASA
  *
  * SPDX-License-Identifier: Apache-2.0
  */
 #define DT_DRV_COMPAT nordic_nrf_gpio

 #include <nrfx_gpiote.h>
 #include <string.h>
 #include <zephyr/drivers/gpio.h>
 #include <zephyr/dt-bindings/gpio/nordic-nrf-gpio.h>
 #include "gpio_utils.h"

 struct gpio_nrfx_data {
 	/* gpio_driver_data needs to be first */
 	struct gpio_driver_data common;
 	sys_slist_t callbacks;
 };

 struct gpio_nrfx_cfg {
 	/* gpio_driver_config needs to be first */
 	struct gpio_driver_config common;
 	NRF_GPIO_Type *port;
 	uint32_t edge_sense;
 	uint8_t port_num;
 };

 static inline struct gpio_nrfx_data *get_port_data(const struct device *port)
 {
 	return port->data;
 }

 static inline const struct gpio_nrfx_cfg *get_port_cfg(const struct device *port)
 {
 	return port->config;
 }

 static int get_drive(gpio_flags_t flags, nrf_gpio_pin_drive_t *drive)
 {
 	switch (flags & (NRF_GPIO_DRIVE_MSK | GPIO_OPEN_DRAIN)) {
 	case NRF_GPIO_DRIVE_S0S1:
 		*drive = NRF_GPIO_PIN_S0S1;
 		break;
 	case NRF_GPIO_DRIVE_S0H1:
 		*drive = NRF_GPIO_PIN_S0H1;
 		break;
 	case NRF_GPIO_DRIVE_H0S1:
 		*drive = NRF_GPIO_PIN_H0S1;
 		break;
 	case NRF_GPIO_DRIVE_H0H1:
 		*drive = NRF_GPIO_PIN_H0H1;
 		break;
 	case NRF_GPIO_DRIVE_S0 | GPIO_OPEN_DRAIN:
 		*drive = NRF_GPIO_PIN_S0D1;
 		break;
 	case NRF_GPIO_DRIVE_H0 | GPIO_OPEN_DRAIN:
 		*drive = NRF_GPIO_PIN_H0D1;
 		break;
 	case NRF_GPIO_DRIVE_S1 | GPIO_OPEN_SOURCE:
 		*drive = NRF_GPIO_PIN_D0S1;
 		break;
 	case NRF_GPIO_DRIVE_H1 | GPIO_OPEN_SOURCE:
 		*drive = NRF_GPIO_PIN_D0H1;
 		break;
 	default:
 		return -EINVAL;
 	}

 	return 0;
 }

 static nrf_gpio_pin_pull_t get_pull(gpio_flags_t flags)
 {
 	if (flags & GPIO_PULL_UP) {
 		return NRF_GPIO_PIN_PULLUP;
 	} else if (flags & GPIO_PULL_DOWN) {
 		return NRF_GPIO_PIN_PULLDOWN;
 	}

 	return NRF_GPIO_PIN_NOPULL;
 }

 static int gpio_nrfx_pin_configure(const struct device *port, gpio_pin_t pin,
 				   gpio_flags_t flags)
 {
 	nrfx_err_t err;
 	uint8_t ch;
 	bool free_ch;
 	const struct gpio_nrfx_cfg *cfg = get_port_cfg(port);
 	nrfx_gpiote_pin_t abs_pin = NRF_GPIO_PIN_MAP(cfg->port_num, pin);

 	/* Get the GPIOTE channel associated with this pin, if any. It needs
 	 * to be freed when the pin is reconfigured or disconnected.
 	 */
 	err = nrfx_gpiote_channel_get(abs_pin, &ch);
 	free_ch = (err == NRFX_SUCCESS);

 	if ((flags & (GPIO_INPUT | GPIO_OUTPUT)) == GPIO_DISCONNECTED) {
 		/* Ignore the error code. The pin may not have been used. */
 		(void)nrfx_gpiote_pin_uninit(abs_pin);

 		if (free_ch) {
 			err = nrfx_gpiote_channel_free(ch);
 			__ASSERT_NO_MSG(err == NRFX_SUCCESS);
 		}

 		return 0;
 	}

 	nrfx_gpiote_trigger_config_t trigger_config = {
 		.trigger = NRFX_GPIOTE_TRIGGER_NONE
 	};

 	/* Remove previously configured trigger when pin is reconfigured. */
 	err = nrfx_gpiote_input_configure(abs_pin, NULL, &trigger_config, NULL);
 	if (err != NRFX_SUCCESS) {
 		return -EINVAL;
 	}

 	if (free_ch) {
 		err = nrfx_gpiote_channel_free(ch);
 		__ASSERT_NO_MSG(err == NRFX_SUCCESS);
 	}

 	if (flags & GPIO_OUTPUT) {
 		nrf_gpio_pin_drive_t drive;
 		int rv = get_drive(flags, &drive);

 		if (rv != 0) {
 			return rv;
 		}

 		nrfx_gpiote_output_config_t output_config = {
 			.drive = drive,
 			.input_connect = (flags & GPIO_INPUT) ?
 				NRF_GPIO_PIN_INPUT_CONNECT :
 				NRF_GPIO_PIN_INPUT_DISCONNECT,
 			.pull = get_pull(flags)
 		};


 		if (flags & GPIO_OUTPUT_INIT_HIGH) {
 			nrf_gpio_port_out_set(cfg->port, BIT(pin));
 		} else if (flags & GPIO_OUTPUT_INIT_LOW) {
 			nrf_gpio_port_out_clear(cfg->port, BIT(pin));
 		}

 		err = nrfx_gpiote_output_configure(abs_pin, &output_config, NULL);
 		return (err != NRFX_SUCCESS) ? -EINVAL : 0;
 	}

 	nrfx_gpiote_input_config_t input_config = {
 		.pull = get_pull(flags)
 	};

 	err = nrfx_gpiote_input_configure(abs_pin, &input_config, NULL, NULL);

 	return (err != NRFX_SUCCESS) ? -EINVAL : 0;
 }

 static int gpio_nrfx_port_get_raw(const struct device *port,
 				  gpio_port_value_t *value)
 {
 	NRF_GPIO_Type *reg = get_port_cfg(port)->port;

 	*value = nrf_gpio_port_in_read(reg);

 	return 0;
 }

 static int gpio_nrfx_port_set_masked_raw(const struct device *port,
 					 gpio_port_pins_t mask,
 					 gpio_port_value_t value)
 {
 	NRF_GPIO_Type *reg = get_port_cfg(port)->port;

 	const uint32_t set_mask = value & mask;
 	const uint32_t clear_mask = (~set_mask) & mask;

 	nrf_gpio_port_out_set(reg, set_mask);
 	nrf_gpio_port_out_clear(reg, clear_mask);

 	return 0;
 }

 static int gpio_nrfx_port_set_bits_raw(const struct device *port,
 				       gpio_port_pins_t mask)
 {
 	NRF_GPIO_Type *reg = get_port_cfg(port)->port;

 	nrf_gpio_port_out_set(reg, mask);

 	return 0;
 }

 static int gpio_nrfx_port_clear_bits_raw(const struct device *port,
 					 gpio_port_pins_t mask)
 {
 	NRF_GPIO_Type *reg = get_port_cfg(port)->port;

 	nrf_gpio_port_out_clear(reg, mask);

 	return 0;
 }

 static int gpio_nrfx_port_toggle_bits(const struct device *port,
 				      gpio_port_pins_t mask)
 {
 	NRF_GPIO_Type *reg = get_port_cfg(port)->port;
 	const uint32_t value = nrf_gpio_port_out_read(reg) ^ mask;
 	const uint32_t set_mask = value & mask;
 	const uint32_t clear_mask = (~value) & mask;

 	nrf_gpio_port_out_set(reg, set_mask);
 	nrf_gpio_port_out_clear(reg, clear_mask);

 	return 0;
 }

 static nrfx_gpiote_trigger_t get_trigger(enum gpio_int_mode mode,
 					 enum gpio_int_trig trig)
 {
 	if (mode == GPIO_INT_MODE_LEVEL) {
 		return trig == GPIO_INT_TRIG_LOW ? NRFX_GPIOTE_TRIGGER_LOW :
 						   NRFX_GPIOTE_TRIGGER_HIGH;
 	}

 	return trig == GPIO_INT_TRIG_BOTH ? NRFX_GPIOTE_TRIGGER_TOGGLE :
 	       trig == GPIO_INT_TRIG_LOW  ? NRFX_GPIOTE_TRIGGER_HITOLO :
 					    NRFX_GPIOTE_TRIGGER_LOTOHI;
 }

 static int gpio_nrfx_pin_interrupt_configure(const struct device *port,
 					     gpio_pin_t pin,
 					     enum gpio_int_mode mode,
 					     enum gpio_int_trig trig)
 {
 	uint32_t abs_pin = NRF_GPIO_PIN_MAP(get_port_cfg(port)->port_num, pin);
 	nrfx_err_t err;
 	uint8_t ch;

 	if (mode == GPIO_INT_MODE_DISABLED) {
 		nrfx_gpiote_trigger_disable(abs_pin);

 		return 0;
 	}

 	nrfx_gpiote_trigger_config_t trigger_config = {
 		.trigger = get_trigger(mode, trig),
 	};

 	/* If edge mode is to be used and pin is not configured to use sense for
 	 * edge use IN event.
 	 */
 	if (!(BIT(pin) & get_port_cfg(port)->edge_sense) &&
 	    (mode == GPIO_INT_MODE_EDGE) &&
 	    (nrf_gpio_pin_dir_get(abs_pin) == NRF_GPIO_PIN_DIR_INPUT)) {
 		err = nrfx_gpiote_channel_get(abs_pin, &ch);
 		if (err == NRFX_ERROR_INVALID_PARAM) {
 			err = nrfx_gpiote_channel_alloc(&ch);
 			if (err != NRFX_SUCCESS) {
 				return -ENOMEM;
 			}
 		}

 		trigger_config.p_in_channel = &ch;
 	}

 	err = nrfx_gpiote_input_configure(abs_pin, NULL, &trigger_config, NULL);
 	if (err != NRFX_SUCCESS) {
 		return -EINVAL;
 	}

 	nrfx_gpiote_trigger_enable(abs_pin, true);

 	return 0;
 }

 static int gpio_nrfx_manage_callback(const struct device *port,
 				     struct gpio_callback *callback,
 				     bool set)
 {
 	return gpio_manage_callback(&get_port_data(port)->callbacks,
 				     callback, set);
 }

 #ifdef CONFIG_GPIO_GET_DIRECTION
 static int gpio_nrfx_port_get_direction(const struct device *port,
 					gpio_port_pins_t map,
 					gpio_port_pins_t *inputs,
 					gpio_port_pins_t *outputs)
 {
 	const struct gpio_nrfx_cfg *cfg = get_port_cfg(port);
 	NRF_GPIO_Type *reg = cfg->port;

 	map &= cfg->common.port_pin_mask;

 	if (outputs != NULL) {
 		*outputs = map & nrf_gpio_port_dir_read(cfg->port);
 	}

 	if (inputs != NULL) {
 		while (map) {
 			uint32_t pin = __CLZ(__RBIT(map));
 			uint32_t pin_cnf = reg->PIN_CNF[pin];

 			/* Check if the pin has its input buffer connected. */
 			if (((pin_cnf & GPIO_PIN_CNF_INPUT_Msk) >>
 			     GPIO_PIN_CNF_INPUT_Pos) ==
 			    GPIO_PIN_CNF_INPUT_Connect) {
 				*inputs |= BIT(pin);
 			}

 			map &= ~BIT(pin);
 		}
 	}

 	return 0;
 }
 #endif /* CONFIG_GPIO_GET_DIRECTION */

 /* Get port device from port id. */
 static const struct device *get_dev(uint32_t port_id)
 {
 	const struct device *dev = NULL;

 	#define GPIO_NRF_GET_DEV(i) \
 		else if (DT_INST_PROP(i, port) == port_id) { \
 			dev = DEVICE_DT_INST_GET(i); \
 		}

 	if (0) {
 	} /* Followed by else if from FOREACH macro. Done to avoid return statement in macro.  */
 	DT_INST_FOREACH_STATUS_OKAY(GPIO_NRF_GET_DEV)
 	#undef GPIO_NRF_GET_DEV

 	return dev;
 }

 static void nrfx_gpio_handler(nrfx_gpiote_pin_t abs_pin,
 			      nrfx_gpiote_trigger_t trigger,
 			      void *context)
 {
 	uint32_t pin = abs_pin;
 	uint32_t port_id = nrf_gpio_pin_port_number_extract(&pin);
 	const struct device *port = get_dev(port_id);

 	/* If given port is handled directly by nrfx driver it might not be enabled in DT. */
 	if (port == NULL) {
 		return;
 	}

 	struct gpio_nrfx_data *data = get_port_data(port);
 	sys_slist_t *list = &data->callbacks;

 	gpio_fire_callbacks(list, port, BIT(pin));
 }

 #define GPIOTE_NODE DT_INST(0, nordic_nrf_gpiote)

 static int gpio_nrfx_init(const struct device *port)
 {
 	nrfx_err_t err;

 	if (nrfx_gpiote_is_init()) {
 		return 0;
 	}

 	err = nrfx_gpiote_init(0/*not used*/);
 	if (err != NRFX_SUCCESS) {
 		return -EIO;
 	}

 	nrfx_gpiote_global_callback_set(nrfx_gpio_handler, NULL);

 	IRQ_CONNECT(DT_IRQN(GPIOTE_NODE), DT_IRQ(GPIOTE_NODE, priority),
 		    nrfx_isr, nrfx_gpiote_irq_handler, 0);

 	return 0;
 }

 static const struct gpio_driver_api gpio_nrfx_drv_api_funcs = {
 	.pin_configure = gpio_nrfx_pin_configure,
 	.port_get_raw = gpio_nrfx_port_get_raw,
 	.port_set_masked_raw = gpio_nrfx_port_set_masked_raw,
 	.port_set_bits_raw = gpio_nrfx_port_set_bits_raw,
 	.port_clear_bits_raw = gpio_nrfx_port_clear_bits_raw,
 	.port_toggle_bits = gpio_nrfx_port_toggle_bits,
 	.pin_interrupt_configure = gpio_nrfx_pin_interrupt_configure,
 	.manage_callback = gpio_nrfx_manage_callback,
 #ifdef CONFIG_GPIO_GET_DIRECTION
 	.port_get_direction = gpio_nrfx_port_get_direction,
 #endif
 };

 /* Device instantiation is done with node labels because 'port_num' is
  * the peripheral number by SoC numbering. We therefore cannot use
  * DT_INST APIs here without wider changes.
  */

 #define GPIO_NRF_DEVICE(id)						\
 	static const struct gpio_nrfx_cfg gpio_nrfx_p##id##_cfg = {	\
 		.common = {						\
 			.port_pin_mask =				\
 			GPIO_PORT_PIN_MASK_FROM_DT_INST(id),		\
 		},							\
 		.port = (NRF_GPIO_Type *)DT_INST_REG_ADDR(id),		\
 		.port_num = DT_INST_PROP(id, port),			\
 		.edge_sense = DT_INST_PROP_OR(id, sense_edge_mask, 0)	\
 	};								\
 									\
 	static struct gpio_nrfx_data gpio_nrfx_p##id##_data;		\
 									\
 	DEVICE_DT_INST_DEFINE(id, gpio_nrfx_init,			\
 			 NULL,						\
 			 &gpio_nrfx_p##id##_data,			\
 			 &gpio_nrfx_p##id##_cfg,			\
 			 PRE_KERNEL_1,					\
 			 CONFIG_GPIO_INIT_PRIORITY,			\
 			 &gpio_nrfx_drv_api_funcs);

 DT_INST_FOREACH_STATUS_OKAY(GPIO_NRF_DEVICE)
	/*
	* Copyright (c) 2021, Nordic Semiconductor ASA
	*
	* SPDX-License-Identifier: Apache-2.0
	*/
	#define DT_DRV_COMPAT nordic_nrf_gpio

	#include <nrfx_gpiote.h>
	#include <string.h>
	#include <zephyr/drivers/gpio.h>
	#include <zephyr/dt-bindings/gpio/nordic-nrf-gpio.h>
	#include "gpio_utils.h"

	struct gpio_nrfx_data {
	/* gpio_driver_data needs to be first */
	struct gpio_driver_data common;
	sys_slist_t callbacks;
	};

	struct gpio_nrfx_cfg {
	/* gpio_driver_config needs to be first */
	struct gpio_driver_config common;
	NRF_GPIO_Type *port;
	uint32_t edge_sense;
	uint8_t port_num;
	};

	static inline struct gpio_nrfx_data get_port_data(const struct device port)
	{
	return port->data;
	}

	static inline const struct gpio_nrfx_cfg get_port_cfg(const struct device port)
	{
	return port->config;
	}

	static int get_drive(gpio_flags_t flags, nrf_gpio_pin_drive_t *drive)
	{
	switch (flags & (NRF_GPIO_DRIVE_MSK \| GPIO_OPEN_DRAIN)) {
	case NRF_GPIO_DRIVE_S0S1:
	*drive = NRF_GPIO_PIN_S0S1;
	break;
	case NRF_GPIO_DRIVE_S0H1:
	*drive = NRF_GPIO_PIN_S0H1;
	break;
	case NRF_GPIO_DRIVE_H0S1:
	*drive = NRF_GPIO_PIN_H0S1;
	break;
	case NRF_GPIO_DRIVE_H0H1:
	*drive = NRF_GPIO_PIN_H0H1;
	break;
	case NRF_GPIO_DRIVE_S0 \| GPIO_OPEN_DRAIN:
	*drive = NRF_GPIO_PIN_S0D1;
	break;
	case NRF_GPIO_DRIVE_H0 \| GPIO_OPEN_DRAIN:
	*drive = NRF_GPIO_PIN_H0D1;
	break;
	case NRF_GPIO_DRIVE_S1 \| GPIO_OPEN_SOURCE:
	*drive = NRF_GPIO_PIN_D0S1;
	break;
	case NRF_GPIO_DRIVE_H1 \| GPIO_OPEN_SOURCE:
	*drive = NRF_GPIO_PIN_D0H1;
	break;
	default:
	return -EINVAL;
	}

	return 0;
	}

	static nrf_gpio_pin_pull_t get_pull(gpio_flags_t flags)
	{
	if (flags & GPIO_PULL_UP) {
	return NRF_GPIO_PIN_PULLUP;
	} else if (flags & GPIO_PULL_DOWN) {
	return NRF_GPIO_PIN_PULLDOWN;
	}

	return NRF_GPIO_PIN_NOPULL;
	}

	static int gpio_nrfx_pin_configure(const struct device *port, gpio_pin_t pin,
	gpio_flags_t flags)
	{
	nrfx_err_t err;
	uint8_t ch;
	bool free_ch;
	const struct gpio_nrfx_cfg *cfg = get_port_cfg(port);
	nrfx_gpiote_pin_t abs_pin = NRF_GPIO_PIN_MAP(cfg->port_num, pin);

	/* Get the GPIOTE channel associated with this pin, if any. It needs
	* to be freed when the pin is reconfigured or disconnected.
	*/
	err = nrfx_gpiote_channel_get(abs_pin, &ch);
	free_ch = (err == NRFX_SUCCESS);

	if ((flags & (GPIO_INPUT \| GPIO_OUTPUT)) == GPIO_DISCONNECTED) {
	/* Ignore the error code. The pin may not have been used. */
	(void)nrfx_gpiote_pin_uninit(abs_pin);

	if (free_ch) {
	err = nrfx_gpiote_channel_free(ch);
	__ASSERT_NO_MSG(err == NRFX_SUCCESS);
	}

	return 0;
	}

	nrfx_gpiote_trigger_config_t trigger_config = {
	.trigger = NRFX_GPIOTE_TRIGGER_NONE
	};

	/* Remove previously configured trigger when pin is reconfigured. */
	err = nrfx_gpiote_input_configure(abs_pin, NULL, &trigger_config, NULL);
	if (err != NRFX_SUCCESS) {
	return -EINVAL;
	}

	if (free_ch) {
	err = nrfx_gpiote_channel_free(ch);
	__ASSERT_NO_MSG(err == NRFX_SUCCESS);
	}

	if (flags & GPIO_OUTPUT) {
	nrf_gpio_pin_drive_t drive;
	int rv = get_drive(flags, &drive);

	if (rv != 0) {
	return rv;
	}

	nrfx_gpiote_output_config_t output_config = {
	.drive = drive,
	.input_connect = (flags & GPIO_INPUT) ?
	NRF_GPIO_PIN_INPUT_CONNECT :
	NRF_GPIO_PIN_INPUT_DISCONNECT,
	.pull = get_pull(flags)
	};


	if (flags & GPIO_OUTPUT_INIT_HIGH) {
	nrf_gpio_port_out_set(cfg->port, BIT(pin));
	} else if (flags & GPIO_OUTPUT_INIT_LOW) {
	nrf_gpio_port_out_clear(cfg->port, BIT(pin));
	}

	err = nrfx_gpiote_output_configure(abs_pin, &output_config, NULL);
	return (err != NRFX_SUCCESS) ? -EINVAL : 0;
	}

	nrfx_gpiote_input_config_t input_config = {
	.pull = get_pull(flags)
	};

	err = nrfx_gpiote_input_configure(abs_pin, &input_config, NULL, NULL);

	return (err != NRFX_SUCCESS) ? -EINVAL : 0;
	}

	static int gpio_nrfx_port_get_raw(const struct device *port,
	gpio_port_value_t *value)
	{
	NRF_GPIO_Type *reg = get_port_cfg(port)->port;

	*value = nrf_gpio_port_in_read(reg);

	return 0;
	}

	static int gpio_nrfx_port_set_masked_raw(const struct device *port,
	gpio_port_pins_t mask,
	gpio_port_value_t value)
	{
	NRF_GPIO_Type *reg = get_port_cfg(port)->port;

	const uint32_t set_mask = value & mask;
	const uint32_t clear_mask = (~set_mask) & mask;

	nrf_gpio_port_out_set(reg, set_mask);
	nrf_gpio_port_out_clear(reg, clear_mask);

	return 0;
	}

	static int gpio_nrfx_port_set_bits_raw(const struct device *port,
	gpio_port_pins_t mask)
	{
	NRF_GPIO_Type *reg = get_port_cfg(port)->port;

	nrf_gpio_port_out_set(reg, mask);

	return 0;
	}

	static int gpio_nrfx_port_clear_bits_raw(const struct device *port,
	gpio_port_pins_t mask)
	{
	NRF_GPIO_Type *reg = get_port_cfg(port)->port;

	nrf_gpio_port_out_clear(reg, mask);

	return 0;
	}

	static int gpio_nrfx_port_toggle_bits(const struct device *port,
	gpio_port_pins_t mask)
	{
	NRF_GPIO_Type *reg = get_port_cfg(port)->port;
	const uint32_t value = nrf_gpio_port_out_read(reg) ^ mask;
	const uint32_t set_mask = value & mask;
	const uint32_t clear_mask = (~value) & mask;

	nrf_gpio_port_out_set(reg, set_mask);
	nrf_gpio_port_out_clear(reg, clear_mask);

	return 0;
	}

	static nrfx_gpiote_trigger_t get_trigger(enum gpio_int_mode mode,
	enum gpio_int_trig trig)
	{
	if (mode == GPIO_INT_MODE_LEVEL) {
	return trig == GPIO_INT_TRIG_LOW ? NRFX_GPIOTE_TRIGGER_LOW :
	NRFX_GPIOTE_TRIGGER_HIGH;
	}

	return trig == GPIO_INT_TRIG_BOTH ? NRFX_GPIOTE_TRIGGER_TOGGLE :
	trig == GPIO_INT_TRIG_LOW ? NRFX_GPIOTE_TRIGGER_HITOLO :
	NRFX_GPIOTE_TRIGGER_LOTOHI;
	}

	static int gpio_nrfx_pin_interrupt_configure(const struct device *port,
	gpio_pin_t pin,
	enum gpio_int_mode mode,
	enum gpio_int_trig trig)
	{
	uint32_t abs_pin = NRF_GPIO_PIN_MAP(get_port_cfg(port)->port_num, pin);
	nrfx_err_t err;
	uint8_t ch;

	if (mode == GPIO_INT_MODE_DISABLED) {
	nrfx_gpiote_trigger_disable(abs_pin);

	return 0;
	}

	nrfx_gpiote_trigger_config_t trigger_config = {
	.trigger = get_trigger(mode, trig),
	};

	/* If edge mode is to be used and pin is not configured to use sense for
	* edge use IN event.
	*/
	if (!(BIT(pin) & get_port_cfg(port)->edge_sense) &&
	(mode == GPIO_INT_MODE_EDGE) &&
	(nrf_gpio_pin_dir_get(abs_pin) == NRF_GPIO_PIN_DIR_INPUT)) {
	err = nrfx_gpiote_channel_get(abs_pin, &ch);
	if (err == NRFX_ERROR_INVALID_PARAM) {
	err = nrfx_gpiote_channel_alloc(&ch);
	if (err != NRFX_SUCCESS) {
	return -ENOMEM;
	}
	}

	trigger_config.p_in_channel = &ch;
	}

	err = nrfx_gpiote_input_configure(abs_pin, NULL, &trigger_config, NULL);
	if (err != NRFX_SUCCESS) {
	return -EINVAL;
	}

	nrfx_gpiote_trigger_enable(abs_pin, true);

	return 0;
	}

	static int gpio_nrfx_manage_callback(const struct device *port,
	struct gpio_callback *callback,
	bool set)
	{
	return gpio_manage_callback(&get_port_data(port)->callbacks,
	callback, set);
	}

	#ifdef CONFIG_GPIO_GET_DIRECTION
	static int gpio_nrfx_port_get_direction(const struct device *port,
	gpio_port_pins_t map,
	gpio_port_pins_t *inputs,
	gpio_port_pins_t *outputs)
	{
	const struct gpio_nrfx_cfg *cfg = get_port_cfg(port);
	NRF_GPIO_Type *reg = cfg->port;

	map &= cfg->common.port_pin_mask;

	if (outputs != NULL) {
	*outputs = map & nrf_gpio_port_dir_read(cfg->port);
	}

	if (inputs != NULL) {
	while (map) {
	uint32_t pin = __CLZ(__RBIT(map));
	uint32_t pin_cnf = reg->PIN_CNF[pin];

	/* Check if the pin has its input buffer connected. */
	if (((pin_cnf & GPIO_PIN_CNF_INPUT_Msk) >>
	GPIO_PIN_CNF_INPUT_Pos) ==
	GPIO_PIN_CNF_INPUT_Connect) {
	*inputs \|= BIT(pin);
	}

	map &= ~BIT(pin);
	}
	}

	return 0;
	}
	#endif /* CONFIG_GPIO_GET_DIRECTION */

	/* Get port device from port id. */
	static const struct device *get_dev(uint32_t port_id)
	{
	const struct device *dev = NULL;

	#define GPIO_NRF_GET_DEV(i) \
	else if (DT_INST_PROP(i, port) == port_id) { \
	dev = DEVICE_DT_INST_GET(i); \
	}

	if (0) {
	} /* Followed by else if from FOREACH macro. Done to avoid return statement in macro. */
	DT_INST_FOREACH_STATUS_OKAY(GPIO_NRF_GET_DEV)
	#undef GPIO_NRF_GET_DEV

	return dev;
	}

	static void nrfx_gpio_handler(nrfx_gpiote_pin_t abs_pin,
	nrfx_gpiote_trigger_t trigger,
	void *context)
	{
	uint32_t pin = abs_pin;
	uint32_t port_id = nrf_gpio_pin_port_number_extract(&pin);
	const struct device *port = get_dev(port_id);

	/* If given port is handled directly by nrfx driver it might not be enabled in DT. */
	if (port == NULL) {
	return;
	}

	struct gpio_nrfx_data *data = get_port_data(port);
	sys_slist_t *list = &data->callbacks;

	gpio_fire_callbacks(list, port, BIT(pin));
	}

	#define GPIOTE_NODE DT_INST(0, nordic_nrf_gpiote)

	static int gpio_nrfx_init(const struct device *port)
	{
	nrfx_err_t err;

	if (nrfx_gpiote_is_init()) {
	return 0;
	}

	err = nrfx_gpiote_init(0/not used/);
	if (err != NRFX_SUCCESS) {
	return -EIO;
	}

	nrfx_gpiote_global_callback_set(nrfx_gpio_handler, NULL);

	IRQ_CONNECT(DT_IRQN(GPIOTE_NODE), DT_IRQ(GPIOTE_NODE, priority),
	nrfx_isr, nrfx_gpiote_irq_handler, 0);

	return 0;
	}

	static const struct gpio_driver_api gpio_nrfx_drv_api_funcs = {
	.pin_configure = gpio_nrfx_pin_configure,
	.port_get_raw = gpio_nrfx_port_get_raw,
	.port_set_masked_raw = gpio_nrfx_port_set_masked_raw,
	.port_set_bits_raw = gpio_nrfx_port_set_bits_raw,
	.port_clear_bits_raw = gpio_nrfx_port_clear_bits_raw,
	.port_toggle_bits = gpio_nrfx_port_toggle_bits,
	.pin_interrupt_configure = gpio_nrfx_pin_interrupt_configure,
	.manage_callback = gpio_nrfx_manage_callback,
	#ifdef CONFIG_GPIO_GET_DIRECTION
	.port_get_direction = gpio_nrfx_port_get_direction,
	#endif
	};

	/* Device instantiation is done with node labels because 'port_num' is
	* the peripheral number by SoC numbering. We therefore cannot use
	* DT_INST APIs here without wider changes.
	*/

	#define GPIO_NRF_DEVICE(id) \
	static const struct gpio_nrfx_cfg gpio_nrfx_p##id##_cfg = { \
	.common = { \
	.port_pin_mask = \
	GPIO_PORT_PIN_MASK_FROM_DT_INST(id), \
	}, \
	.port = (NRF_GPIO_Type *)DT_INST_REG_ADDR(id), \
	.port_num = DT_INST_PROP(id, port), \
	.edge_sense = DT_INST_PROP_OR(id, sense_edge_mask, 0) \
	}; \
	\
	static struct gpio_nrfx_data gpio_nrfx_p##id##_data; \
	\
	DEVICE_DT_INST_DEFINE(id, gpio_nrfx_init, \
	NULL, \
	&gpio_nrfx_p##id##_data, \
	&gpio_nrfx_p##id##_cfg, \
	PRE_KERNEL_1, \
	CONFIG_GPIO_INIT_PRIORITY, \
	&gpio_nrfx_drv_api_funcs);

	DT_INST_FOREACH_STATUS_OKAY(GPIO_NRF_DEVICE)