drivers/gpio/gpio_rzt2m.c - third_party/github/zephyrproject-rtos/zephyr - Git at Google

 /*
  * Copyright (c) 2023 Antmicro <www.antmicro.com>
  *
  * SPDX-License-Identifier: Apache-2.0
  */

 #define DT_DRV_COMPAT renesas_rzt2m_gpio

 #include <zephyr/device.h>
 #include <zephyr/drivers/gpio.h>
 #include <zephyr/drivers/gpio/gpio_utils.h>
 #include <zephyr/drivers/syscon.h>
 #include <zephyr/sys/util.h>
 #include <zephyr/sys/errno_private.h>
 #include <zephyr/dt-bindings/gpio/renesas-rzt2m-gpio.h>
 #include <soc.h>
 #include <zephyr/drivers/gpio/gpio_utils.h>
 #include <zephyr/irq.h>

 static const struct device *const ns_portnf_md_dev = DEVICE_DT_GET(DT_NODELABEL(ns_portnf_md));

 #define PMm_OFFSET    0x200
 #define PMCm_OFFSET   0x400
 #define PFCm_OFFSET   0x600
 #define PINm_OFFSET   0x800
 #define DRCTLm_OFFSET 0xa00

 #define PMm_SIZE    0x2
 #define DRCTLm_SIZE 0x8
 #define PFCm_SIZE   0x4

 /* config defines in include/zephyr/dt-bindings/gpio/renesas-rzt2m-gpio.h */
 #define DRIVE_SHIFT           0
 #define SCHMITT_TRIGGER_SHIFT 4
 #define SLEW_RATE_SHIFT       5

 #define PULL_SHIFT 2
 #define PULL_NONE  (0 << PULL_SHIFT)
 #define PULL_UP    (1 << PULL_SHIFT)
 #define PULL_DOWN  (2 << PULL_SHIFT)

 #define INT_INVERT       0
 #define INT_FALLING_EDGE 1
 #define INT_RISING_EDGE  2
 #define INT_BOTH_EDGE    3

 #define IRQ_COUNT    16
 #define NS_IRQ_COUNT 14

 #define MAX_PORT_SIZE 8

 #define RZT2M_GPIO_VALUE_IDENTITY(i, _) i

 struct rzt2m_gpio_config {
 	struct gpio_driver_config common;
 	uint8_t pin_irqs[MAX_PORT_SIZE];
 	uint8_t *port_nsr;
 	uint8_t *ptadr;
 	uint8_t port;
 };

 struct rzt2m_gpio_data {
 	struct gpio_driver_data common;
 	sys_slist_t cb;
 };

 struct rzt2m_gpio_irq_slot {
 	const struct device *dev;
 	uint8_t pin;
 };

 struct rzt2m_gpio_common_data {
 	struct rzt2m_gpio_irq_slot irq_registered_ports[IRQ_COUNT];
 };

 static struct rzt2m_gpio_common_data rzt2m_gpio_common_data_inst;

 static void rzt2m_gpio_unlock(void)
 {
 	rzt2m_unlock_prcrn(PRCRN_PRC1 | PRCRN_PRC2);
 	rzt2m_unlock_prcrs(PRCRS_GPIO);
 }

 static void rzt2m_gpio_lock(void)
 {
 	rzt2m_lock_prcrn(PRCRN_PRC1 | PRCRN_PRC2);
 	rzt2m_lock_prcrs(PRCRS_GPIO);
 }

 /* Port m output data store */
 static volatile uint8_t *rzt2m_gpio_get_p_reg(const struct device *dev)
 {
 	const struct rzt2m_gpio_config *config = dev->config;

 	return (volatile uint8_t *)(config->port_nsr + config->port);
 }

 /* Port m input data store */
 static volatile uint8_t *rzt2m_gpio_get_pin_reg(const struct device *dev)
 {
 	const struct rzt2m_gpio_config *config = dev->config;

 	return (volatile uint8_t *)(config->port_nsr + PINm_OFFSET + config->port);
 }

 /* Port m mode register */
 static volatile uint16_t *rzt2m_gpio_get_pm_reg(const struct device *dev)
 {
 	const struct rzt2m_gpio_config *config = dev->config;

 	return (volatile uint16_t *)(config->port_nsr + PMm_OFFSET + PMm_SIZE * config->port);
 }

 /* IO Buffer m function switching register */
 static volatile uint64_t *rzt2m_gpio_get_drctl_reg(const struct device *dev)
 {
 	const struct rzt2m_gpio_config *config = dev->config;

 	return (volatile uint64_t *)(config->port_nsr + DRCTLm_OFFSET + DRCTLm_SIZE * config->port);
 }

 /* Port m region select register */
 static volatile uint8_t *rzt2m_gpio_get_rselp_reg(const struct device *dev)
 {
 	const struct rzt2m_gpio_config *config = dev->config;

 	return (volatile uint8_t *)(config->ptadr + config->port);
 }

 /* Port m mode control register */
 static volatile uint8_t *rzt2m_gpio_get_pmc_reg(const struct device *dev, uint8_t port)
 {
 	const struct rzt2m_gpio_config *config = dev->config;

 	return (volatile uint8_t *)(config->port_nsr + PMCm_OFFSET + port);
 }

 /* Port m function control register */
 static volatile uint32_t *rzt2m_gpio_get_pfc_reg(const struct device *dev, uint8_t port)
 {
 	const struct rzt2m_gpio_config *config = dev->config;

 	return (volatile uint32_t *)(config->port_nsr + PFCm_OFFSET + PFCm_SIZE * port);
 }

 static int rzt2m_gpio_init(const struct device *dev)
 {
 	rzt2m_gpio_unlock();

 	volatile uint8_t *rselp_reg = rzt2m_gpio_get_rselp_reg(dev);
 	*rselp_reg = 0xFF;

 	rzt2m_gpio_lock();

 	return 0;
 }

 static int rzt2m_gpio_get_raw(const struct device *dev, gpio_port_value_t *value)
 {
 	rzt2m_gpio_unlock();

 	volatile uint8_t *pin_reg = rzt2m_gpio_get_pin_reg(dev);
 	*value = *pin_reg;

 	rzt2m_gpio_lock();

 	return 0;
 }

 static int rzt2m_port_set_masked_raw(const struct device *dev, gpio_port_pins_t mask,
 				     gpio_port_value_t value)
 {
 	rzt2m_gpio_unlock();

 	volatile uint8_t *p_reg = rzt2m_gpio_get_p_reg(dev);
 	*p_reg = (*p_reg & ~mask) | (value & mask);

 	rzt2m_gpio_lock();

 	return 0;
 }

 static int rzt2m_port_set_bits_raw(const struct device *dev, gpio_port_pins_t pins)
 {
 	rzt2m_gpio_unlock();

 	volatile uint8_t *p_reg = rzt2m_gpio_get_p_reg(dev);
 	*p_reg |= pins;

 	rzt2m_gpio_lock();

 	return 0;
 }

 static int rzt2m_port_clear_bits_raw(const struct device *dev, gpio_port_pins_t pins)
 {
 	rzt2m_gpio_unlock();

 	volatile uint8_t *p_reg = rzt2m_gpio_get_p_reg(dev);
 	*p_reg &= ~pins;

 	rzt2m_gpio_lock();

 	return 0;
 }

 static int rzt2m_gpio_toggle(const struct device *dev, gpio_port_pins_t pins)
 {
 	rzt2m_gpio_unlock();

 	volatile uint8_t *p_reg = rzt2m_gpio_get_p_reg(dev);
 	*p_reg ^= pins;

 	rzt2m_gpio_lock();

 	return 0;
 }

 static int rzt2m_gpio_configure(const struct device *dev, gpio_pin_t pin, gpio_flags_t flags)
 {
 	volatile uint16_t *pm_reg = rzt2m_gpio_get_pm_reg(dev);
 	volatile uint64_t *drctl_reg = rzt2m_gpio_get_drctl_reg(dev);

 	rzt2m_gpio_unlock();

 	WRITE_BIT(*pm_reg, pin * 2, flags & GPIO_INPUT);
 	WRITE_BIT(*pm_reg, pin * 2 + 1, flags & GPIO_OUTPUT);

 	if (flags & GPIO_OUTPUT) {
 		if (flags & GPIO_OUTPUT_INIT_LOW) {
 			rzt2m_port_clear_bits_raw(dev, 1 << pin);
 		} else if (flags & GPIO_OUTPUT_INIT_HIGH) {
 			rzt2m_port_set_bits_raw(dev, 1 << pin);
 		}
 	}

 	if (flags & GPIO_PULL_UP && flags & GPIO_PULL_DOWN) {
 		rzt2m_gpio_lock();
 		return -EINVAL;
 	}

 	uint8_t drctl_pin_config = 0;

 	if (flags & GPIO_PULL_UP) {
 		drctl_pin_config |= PULL_UP;
 	} else if (flags & GPIO_PULL_DOWN) {
 		drctl_pin_config |= PULL_DOWN;
 	} else {
 		drctl_pin_config |= PULL_NONE;
 	}

 	drctl_pin_config |=
 		(flags & RZT2M_GPIO_DRIVE_MASK) >> (RZT2M_GPIO_DRIVE_OFFSET - DRIVE_SHIFT);
 	drctl_pin_config |= (flags & RZT2M_GPIO_SCHMITT_TRIGGER_MASK) >>
 			    (RZT2M_GPIO_SCHMITT_TRIGGER_OFFSET - SCHMITT_TRIGGER_SHIFT);
 	drctl_pin_config |= (flags & RZT2M_GPIO_SLEW_RATE_MASK) >>
 			    (RZT2M_GPIO_SLEW_RATE_OFFSET - SLEW_RATE_SHIFT);

 	uint64_t drctl_pin_value = *drctl_reg & ~(0xFFULL << (pin * 8));
 	*drctl_reg = drctl_pin_value | ((uint64_t)drctl_pin_config << (pin * 8));

 	rzt2m_gpio_lock();

 	return 0;
 }

 static int rzt2m_gpio_get_pin_irq(const struct device *dev, gpio_pin_t pin)
 {
 	const struct rzt2m_gpio_config *config = dev->config;

 	if (pin >= MAX_PORT_SIZE) {
 		return -1;
 	}
 	return config->pin_irqs[pin] - 1;
 }

 static bool rzt2m_gpio_is_irq_used_by_other_pin(const struct device *dev, gpio_pin_t pin,
 						uint8_t irq)
 {
 	if (irq >= IRQ_COUNT) {
 		return false;
 	}
 	if (rzt2m_gpio_common_data_inst.irq_registered_ports[irq].dev == NULL) {
 		return false;
 	}
 	if (rzt2m_gpio_common_data_inst.irq_registered_ports[irq].dev != dev) {
 		return true;
 	}
 	return rzt2m_gpio_common_data_inst.irq_registered_ports[irq].pin != pin;
 }

 static void rzt2m_gpio_isr(uint8_t *irq_n)
 {
 	const struct device *dev = rzt2m_gpio_common_data_inst.irq_registered_ports[*irq_n].dev;

 	if (dev) {
 		struct rzt2m_gpio_data *data = dev->data;
 		int irq_pin = rzt2m_gpio_common_data_inst.irq_registered_ports[*irq_n].pin;

 		if (irq_pin >= 0) {
 			gpio_fire_callbacks(&data->cb, dev, 1 << irq_pin);
 		}
 	}
 }

 static int rzt2m_gpio_pin_interrupt_configure(const struct device *dev, gpio_pin_t pin,
 					      enum gpio_int_mode mode, enum gpio_int_trig trig)
 {
 	const struct rzt2m_gpio_config *config = dev->config;
 	volatile uint8_t *pmc_reg = rzt2m_gpio_get_pmc_reg(dev, config->port);
 	volatile uint32_t *pfc_reg = rzt2m_gpio_get_pfc_reg(dev, config->port);
 	uint32_t ns_portnf_md_val = 0;

 	syscon_read_reg(ns_portnf_md_dev, 0, &ns_portnf_md_val);

 	/* level interrupts are not supported */
 	if (mode == GPIO_INT_MODE_LEVEL) {
 		return -ENOTSUP;
 	}

 	uint8_t irq = rzt2m_gpio_get_pin_irq(dev, pin);
 	bool irq_used_by_other = rzt2m_gpio_is_irq_used_by_other_pin(dev, pin, irq);

 	if (irq < 0) {
 		return -ENOTSUP;
 	}

 	/* secure range - currently not supported*/
 	if (irq >= NS_IRQ_COUNT) {
 		return -ENOSYS;
 	}

 	if (mode == GPIO_INT_MODE_DISABLED) {
 		rzt2m_gpio_unlock();
 		WRITE_BIT(*pmc_reg, pin, 0);

 		/* check if selected pin is using irq line to avoid unregistering other pin irq
 		 * handler
 		 */
 		if (!irq_used_by_other) {
 			rzt2m_gpio_common_data_inst.irq_registered_ports[irq].dev = NULL;
 		}
 		rzt2m_gpio_lock();
 		return 0;
 	}

 	/* the irq line is used by another pin */
 	if (irq_used_by_other) {
 		return -EBUSY;
 	}

 	uint8_t md_mode = 0x0;

 	switch (trig) {
 	case GPIO_INT_TRIG_LOW:
 		md_mode = INT_FALLING_EDGE;
 		break;
 	case GPIO_INT_TRIG_HIGH:
 		md_mode = INT_RISING_EDGE;
 		break;
 	case GPIO_INT_TRIG_BOTH:
 		md_mode = INT_BOTH_EDGE;
 	}

 	rzt2m_gpio_unlock();

 	uint32_t mdx_mask =
 		~((uint32_t)0b11 << irq); /* description of interrupt type has length of 2 bits */
 	ns_portnf_md_val = (ns_portnf_md_val & mdx_mask) | (md_mode << irq);
 	syscon_write_reg(ns_portnf_md_dev, 0, ns_portnf_md_val); /* set interrupt type */

 	WRITE_BIT(*pmc_reg, pin, 1); /* enable special function on selected pin */

 	/* in case of every pin on every port irq function number is 0 */
 	*pfc_reg &= ~((uint32_t)0b1111 << pin * 4);

 	/* register handling interrupt in isr for selected port and pin */
 	rzt2m_gpio_common_data_inst.irq_registered_ports[irq].dev = dev;
 	rzt2m_gpio_common_data_inst.irq_registered_ports[irq].pin = pin;

 	rzt2m_gpio_lock();

 	return 0;
 }

 static int rzt2m_gpio_manage_callback(const struct device *dev, struct gpio_callback *cb, bool set)
 {
 	struct rzt2m_gpio_data *data = dev->data;

 	return gpio_manage_callback(&data->cb, cb, set);
 }

 static const struct gpio_driver_api rzt2m_gpio_driver_api = {
 	.pin_configure = rzt2m_gpio_configure,
 	.port_get_raw = rzt2m_gpio_get_raw,
 	.port_set_masked_raw = rzt2m_port_set_masked_raw,
 	.port_set_bits_raw = rzt2m_port_set_bits_raw,
 	.port_clear_bits_raw = rzt2m_port_clear_bits_raw,
 	.port_toggle_bits = rzt2m_gpio_toggle,
 	.pin_interrupt_configure = rzt2m_gpio_pin_interrupt_configure,
 	.manage_callback = rzt2m_gpio_manage_callback};

 #define RZT2M_INIT_IRQ(irq_n)                                                              \
 	IRQ_CONNECT(DT_IRQ_BY_IDX(DT_INST(0, renesas_rzt2m_gpio_common), irq_n, irq),          \
 		    DT_IRQ_BY_IDX(DT_INST(0, renesas_rzt2m_gpio_common), irq_n, priority),         \
 		    rzt2m_gpio_isr, &n[irq_n],                                                     \
 		    DT_IRQ_BY_IDX(DT_INST(0, renesas_rzt2m_gpio_common), irq_n, flags))            \
 	irq_enable(DT_IRQ_BY_IDX(DT_INST(0, renesas_rzt2m_gpio_common), irq_n, irq));

 static int rzt2m_gpio_common_init(const struct device *dev)
 {
 	struct rzt2m_gpio_common_data *data = dev->data;

 	static uint8_t n[IRQ_COUNT];

 	for (int i = 0; i < ARRAY_SIZE(n); i++) {
 		n[i] = i;
 		data->irq_registered_ports[i].dev = NULL;
 	}

 	FOR_EACH(RZT2M_INIT_IRQ, (), LISTIFY(NS_IRQ_COUNT, RZT2M_GPIO_VALUE_IDENTITY, (,)))

 	return 0;
 }

 DEVICE_DT_DEFINE(DT_INST(0, renesas_rzt2m_gpio_common),
 		    rzt2m_gpio_common_init,
 		    NULL,
 		    &rzt2m_gpio_common_data_inst, NULL,
 		    PRE_KERNEL_1, CONFIG_GPIO_INIT_PRIORITY,
 		    NULL);

 #define VALUE_2X(i, _) UTIL_X2(i)

 #define PIN_IRQ_INITIALIZER(idx, inst)                                                             \
 	COND_CODE_1(DT_INST_PROP_HAS_IDX(inst, irqs, idx),                                         \
 		    ([DT_INST_PROP_BY_IDX(inst, irqs, idx)] =                                      \
 			     DT_INST_PROP_BY_IDX(inst, irqs, UTIL_INC(idx)) + 1,),                \
 		    ())

 #define PORT_IRQS_INITIALIZER(inst)                                                                \
 	FOR_EACH_FIXED_ARG(PIN_IRQ_INITIALIZER, (), inst,                                          \
 			   LISTIFY(DT_INST_PROP_LEN_OR(inst, irqs, 0), VALUE_2X, (,)))

 #define RZT2M_GPIO_DEFINE(inst)                                                                    \
 	static struct rzt2m_gpio_data rzt2m_gpio_data##inst;                                       \
 	static struct rzt2m_gpio_config rzt2m_gpio_config##inst = {                                \
 		.port_nsr = (uint8_t *)DT_REG_ADDR_BY_NAME(DT_INST_GPARENT(inst), port_nsr),       \
 		.ptadr = (uint8_t *)DT_REG_ADDR_BY_NAME(DT_INST_GPARENT(inst), ptadr),             \
 		.port = DT_INST_REG_ADDR(inst),                                                    \
 		.pin_irqs = {PORT_IRQS_INITIALIZER(inst)},                                         \
 		.common = {.port_pin_mask = GPIO_PORT_PIN_MASK_FROM_DT_INST(inst)}};               \
 	DEVICE_DT_INST_DEFINE(inst, rzt2m_gpio_init, NULL, &rzt2m_gpio_data##inst,          \
 			      &rzt2m_gpio_config##inst, PRE_KERNEL_1, CONFIG_GPIO_INIT_PRIORITY,   \
 			      &rzt2m_gpio_driver_api);

 DT_INST_FOREACH_STATUS_OKAY(RZT2M_GPIO_DEFINE)
	/*
	* Copyright (c) 2023 Antmicro <www.antmicro.com>
	*
	* SPDX-License-Identifier: Apache-2.0
	*/

	#define DT_DRV_COMPAT renesas_rzt2m_gpio

	#include <zephyr/device.h>
	#include <zephyr/drivers/gpio.h>
	#include <zephyr/drivers/gpio/gpio_utils.h>
	#include <zephyr/drivers/syscon.h>
	#include <zephyr/sys/util.h>
	#include <zephyr/sys/errno_private.h>
	#include <zephyr/dt-bindings/gpio/renesas-rzt2m-gpio.h>
	#include <soc.h>
	#include <zephyr/drivers/gpio/gpio_utils.h>
	#include <zephyr/irq.h>

	static const struct device *const ns_portnf_md_dev = DEVICE_DT_GET(DT_NODELABEL(ns_portnf_md));

	#define PMm_OFFSET 0x200
	#define PMCm_OFFSET 0x400
	#define PFCm_OFFSET 0x600
	#define PINm_OFFSET 0x800
	#define DRCTLm_OFFSET 0xa00

	#define PMm_SIZE 0x2
	#define DRCTLm_SIZE 0x8
	#define PFCm_SIZE 0x4

	/* config defines in include/zephyr/dt-bindings/gpio/renesas-rzt2m-gpio.h */
	#define DRIVE_SHIFT 0
	#define SCHMITT_TRIGGER_SHIFT 4
	#define SLEW_RATE_SHIFT 5

	#define PULL_SHIFT 2
	#define PULL_NONE (0 << PULL_SHIFT)
	#define PULL_UP (1 << PULL_SHIFT)
	#define PULL_DOWN (2 << PULL_SHIFT)

	#define INT_INVERT 0
	#define INT_FALLING_EDGE 1
	#define INT_RISING_EDGE 2
	#define INT_BOTH_EDGE 3

	#define IRQ_COUNT 16
	#define NS_IRQ_COUNT 14

	#define MAX_PORT_SIZE 8

	#define RZT2M_GPIO_VALUE_IDENTITY(i, _) i

	struct rzt2m_gpio_config {
	struct gpio_driver_config common;
	uint8_t pin_irqs[MAX_PORT_SIZE];
	uint8_t *port_nsr;
	uint8_t *ptadr;
	uint8_t port;
	};

	struct rzt2m_gpio_data {
	struct gpio_driver_data common;
	sys_slist_t cb;
	};

	struct rzt2m_gpio_irq_slot {
	const struct device *dev;
	uint8_t pin;
	};

	struct rzt2m_gpio_common_data {
	struct rzt2m_gpio_irq_slot irq_registered_ports[IRQ_COUNT];
	};

	static struct rzt2m_gpio_common_data rzt2m_gpio_common_data_inst;

	static void rzt2m_gpio_unlock(void)
	{
	rzt2m_unlock_prcrn(PRCRN_PRC1 \| PRCRN_PRC2);
	rzt2m_unlock_prcrs(PRCRS_GPIO);
	}

	static void rzt2m_gpio_lock(void)
	{
	rzt2m_lock_prcrn(PRCRN_PRC1 \| PRCRN_PRC2);
	rzt2m_lock_prcrs(PRCRS_GPIO);
	}

	/* Port m output data store */
	static volatile uint8_t rzt2m_gpio_get_p_reg(const struct device dev)
	{
	const struct rzt2m_gpio_config *config = dev->config;

	return (volatile uint8_t *)(config->port_nsr + config->port);
	}

	/* Port m input data store */
	static volatile uint8_t rzt2m_gpio_get_pin_reg(const struct device dev)
	{
	const struct rzt2m_gpio_config *config = dev->config;

	return (volatile uint8_t *)(config->port_nsr + PINm_OFFSET + config->port);
	}

	/* Port m mode register */
	static volatile uint16_t rzt2m_gpio_get_pm_reg(const struct device dev)
	{
	const struct rzt2m_gpio_config *config = dev->config;

	return (volatile uint16_t )(config->port_nsr + PMm_OFFSET + PMm_SIZE config->port);
	}

	/* IO Buffer m function switching register */
	static volatile uint64_t rzt2m_gpio_get_drctl_reg(const struct device dev)
	{
	const struct rzt2m_gpio_config *config = dev->config;

	return (volatile uint64_t )(config->port_nsr + DRCTLm_OFFSET + DRCTLm_SIZE config->port);
	}

	/* Port m region select register */
	static volatile uint8_t rzt2m_gpio_get_rselp_reg(const struct device dev)
	{
	const struct rzt2m_gpio_config *config = dev->config;

	return (volatile uint8_t *)(config->ptadr + config->port);
	}

	/* Port m mode control register */
	static volatile uint8_t rzt2m_gpio_get_pmc_reg(const struct device dev, uint8_t port)
	{
	const struct rzt2m_gpio_config *config = dev->config;

	return (volatile uint8_t *)(config->port_nsr + PMCm_OFFSET + port);
	}

	/* Port m function control register */
	static volatile uint32_t rzt2m_gpio_get_pfc_reg(const struct device dev, uint8_t port)
	{
	const struct rzt2m_gpio_config *config = dev->config;

	return (volatile uint32_t )(config->port_nsr + PFCm_OFFSET + PFCm_SIZE port);
	}

	static int rzt2m_gpio_init(const struct device *dev)
	{
	rzt2m_gpio_unlock();

	volatile uint8_t *rselp_reg = rzt2m_gpio_get_rselp_reg(dev);
	*rselp_reg = 0xFF;

	rzt2m_gpio_lock();

	return 0;
	}

	static int rzt2m_gpio_get_raw(const struct device dev, gpio_port_value_t value)
	{
	rzt2m_gpio_unlock();

	volatile uint8_t *pin_reg = rzt2m_gpio_get_pin_reg(dev);
	value = pin_reg;

	rzt2m_gpio_lock();

	return 0;
	}

	static int rzt2m_port_set_masked_raw(const struct device *dev, gpio_port_pins_t mask,
	gpio_port_value_t value)
	{
	rzt2m_gpio_unlock();

	volatile uint8_t *p_reg = rzt2m_gpio_get_p_reg(dev);
	p_reg = (p_reg & ~mask) \| (value & mask);

	rzt2m_gpio_lock();

	return 0;
	}

	static int rzt2m_port_set_bits_raw(const struct device *dev, gpio_port_pins_t pins)
	{
	rzt2m_gpio_unlock();

	volatile uint8_t *p_reg = rzt2m_gpio_get_p_reg(dev);
	*p_reg \|= pins;

	rzt2m_gpio_lock();

	return 0;
	}

	static int rzt2m_port_clear_bits_raw(const struct device *dev, gpio_port_pins_t pins)
	{
	rzt2m_gpio_unlock();

	volatile uint8_t *p_reg = rzt2m_gpio_get_p_reg(dev);
	*p_reg &= ~pins;

	rzt2m_gpio_lock();

	return 0;
	}

	static int rzt2m_gpio_toggle(const struct device *dev, gpio_port_pins_t pins)
	{
	rzt2m_gpio_unlock();

	volatile uint8_t *p_reg = rzt2m_gpio_get_p_reg(dev);
	*p_reg ^= pins;

	rzt2m_gpio_lock();

	return 0;
	}

	static int rzt2m_gpio_configure(const struct device *dev, gpio_pin_t pin, gpio_flags_t flags)
	{
	volatile uint16_t *pm_reg = rzt2m_gpio_get_pm_reg(dev);
	volatile uint64_t *drctl_reg = rzt2m_gpio_get_drctl_reg(dev);

	rzt2m_gpio_unlock();

	WRITE_BIT(pm_reg, pin 2, flags & GPIO_INPUT);
	WRITE_BIT(pm_reg, pin 2 + 1, flags & GPIO_OUTPUT);

	if (flags & GPIO_OUTPUT) {
	if (flags & GPIO_OUTPUT_INIT_LOW) {
	rzt2m_port_clear_bits_raw(dev, 1 << pin);
	} else if (flags & GPIO_OUTPUT_INIT_HIGH) {
	rzt2m_port_set_bits_raw(dev, 1 << pin);
	}
	}

	if (flags & GPIO_PULL_UP && flags & GPIO_PULL_DOWN) {
	rzt2m_gpio_lock();
	return -EINVAL;
	}

	uint8_t drctl_pin_config = 0;

	if (flags & GPIO_PULL_UP) {
	drctl_pin_config \|= PULL_UP;
	} else if (flags & GPIO_PULL_DOWN) {
	drctl_pin_config \|= PULL_DOWN;
	} else {
	drctl_pin_config \|= PULL_NONE;
	}

	drctl_pin_config \|=
	(flags & RZT2M_GPIO_DRIVE_MASK) >> (RZT2M_GPIO_DRIVE_OFFSET - DRIVE_SHIFT);
	drctl_pin_config \|= (flags & RZT2M_GPIO_SCHMITT_TRIGGER_MASK) >>
	(RZT2M_GPIO_SCHMITT_TRIGGER_OFFSET - SCHMITT_TRIGGER_SHIFT);
	drctl_pin_config \|= (flags & RZT2M_GPIO_SLEW_RATE_MASK) >>
	(RZT2M_GPIO_SLEW_RATE_OFFSET - SLEW_RATE_SHIFT);

	uint64_t drctl_pin_value = drctl_reg & ~(0xFFULL << (pin 8));
	drctl_reg = drctl_pin_value \| ((uint64_t)drctl_pin_config << (pin 8));

	rzt2m_gpio_lock();

	return 0;
	}

	static int rzt2m_gpio_get_pin_irq(const struct device *dev, gpio_pin_t pin)
	{
	const struct rzt2m_gpio_config *config = dev->config;

	if (pin >= MAX_PORT_SIZE) {
	return -1;
	}
	return config->pin_irqs[pin] - 1;
	}

	static bool rzt2m_gpio_is_irq_used_by_other_pin(const struct device *dev, gpio_pin_t pin,
	uint8_t irq)
	{
	if (irq >= IRQ_COUNT) {
	return false;
	}
	if (rzt2m_gpio_common_data_inst.irq_registered_ports[irq].dev == NULL) {
	return false;
	}
	if (rzt2m_gpio_common_data_inst.irq_registered_ports[irq].dev != dev) {
	return true;
	}
	return rzt2m_gpio_common_data_inst.irq_registered_ports[irq].pin != pin;
	}

	static void rzt2m_gpio_isr(uint8_t *irq_n)
	{
	const struct device dev = rzt2m_gpio_common_data_inst.irq_registered_ports[irq_n].dev;

	if (dev) {
	struct rzt2m_gpio_data *data = dev->data;
	int irq_pin = rzt2m_gpio_common_data_inst.irq_registered_ports[*irq_n].pin;

	if (irq_pin >= 0) {
	gpio_fire_callbacks(&data->cb, dev, 1 << irq_pin);
	}
	}
	}

	static int rzt2m_gpio_pin_interrupt_configure(const struct device *dev, gpio_pin_t pin,
	enum gpio_int_mode mode, enum gpio_int_trig trig)
	{
	const struct rzt2m_gpio_config *config = dev->config;
	volatile uint8_t *pmc_reg = rzt2m_gpio_get_pmc_reg(dev, config->port);
	volatile uint32_t *pfc_reg = rzt2m_gpio_get_pfc_reg(dev, config->port);
	uint32_t ns_portnf_md_val = 0;

	syscon_read_reg(ns_portnf_md_dev, 0, &ns_portnf_md_val);

	/* level interrupts are not supported */
	if (mode == GPIO_INT_MODE_LEVEL) {
	return -ENOTSUP;
	}

	uint8_t irq = rzt2m_gpio_get_pin_irq(dev, pin);
	bool irq_used_by_other = rzt2m_gpio_is_irq_used_by_other_pin(dev, pin, irq);

	if (irq < 0) {
	return -ENOTSUP;
	}

	/* secure range - currently not supported*/
	if (irq >= NS_IRQ_COUNT) {
	return -ENOSYS;
	}

	if (mode == GPIO_INT_MODE_DISABLED) {
	rzt2m_gpio_unlock();
	WRITE_BIT(*pmc_reg, pin, 0);

	/* check if selected pin is using irq line to avoid unregistering other pin irq
	* handler
	*/
	if (!irq_used_by_other) {
	rzt2m_gpio_common_data_inst.irq_registered_ports[irq].dev = NULL;
	}
	rzt2m_gpio_lock();
	return 0;
	}

	/* the irq line is used by another pin */
	if (irq_used_by_other) {
	return -EBUSY;
	}

	uint8_t md_mode = 0x0;

	switch (trig) {
	case GPIO_INT_TRIG_LOW:
	md_mode = INT_FALLING_EDGE;
	break;
	case GPIO_INT_TRIG_HIGH:
	md_mode = INT_RISING_EDGE;
	break;
	case GPIO_INT_TRIG_BOTH:
	md_mode = INT_BOTH_EDGE;
	}

	rzt2m_gpio_unlock();

	uint32_t mdx_mask =
	~((uint32_t)0b11 << irq); /* description of interrupt type has length of 2 bits */
	ns_portnf_md_val = (ns_portnf_md_val & mdx_mask) \| (md_mode << irq);
	syscon_write_reg(ns_portnf_md_dev, 0, ns_portnf_md_val); /* set interrupt type */

	WRITE_BIT(pmc_reg, pin, 1); / enable special function on selected pin */

	/* in case of every pin on every port irq function number is 0 */
	pfc_reg &= ~((uint32_t)0b1111 << pin 4);

	/* register handling interrupt in isr for selected port and pin */
	rzt2m_gpio_common_data_inst.irq_registered_ports[irq].dev = dev;
	rzt2m_gpio_common_data_inst.irq_registered_ports[irq].pin = pin;

	rzt2m_gpio_lock();

	return 0;
	}

	static int rzt2m_gpio_manage_callback(const struct device dev, struct gpio_callback cb, bool set)
	{
	struct rzt2m_gpio_data *data = dev->data;

	return gpio_manage_callback(&data->cb, cb, set);
	}

	static const struct gpio_driver_api rzt2m_gpio_driver_api = {
	.pin_configure = rzt2m_gpio_configure,
	.port_get_raw = rzt2m_gpio_get_raw,
	.port_set_masked_raw = rzt2m_port_set_masked_raw,
	.port_set_bits_raw = rzt2m_port_set_bits_raw,
	.port_clear_bits_raw = rzt2m_port_clear_bits_raw,
	.port_toggle_bits = rzt2m_gpio_toggle,
	.pin_interrupt_configure = rzt2m_gpio_pin_interrupt_configure,
	.manage_callback = rzt2m_gpio_manage_callback};

	#define RZT2M_INIT_IRQ(irq_n) \
	IRQ_CONNECT(DT_IRQ_BY_IDX(DT_INST(0, renesas_rzt2m_gpio_common), irq_n, irq), \
	DT_IRQ_BY_IDX(DT_INST(0, renesas_rzt2m_gpio_common), irq_n, priority), \
	rzt2m_gpio_isr, &n[irq_n], \
	DT_IRQ_BY_IDX(DT_INST(0, renesas_rzt2m_gpio_common), irq_n, flags)) \
	irq_enable(DT_IRQ_BY_IDX(DT_INST(0, renesas_rzt2m_gpio_common), irq_n, irq));

	static int rzt2m_gpio_common_init(const struct device *dev)
	{
	struct rzt2m_gpio_common_data *data = dev->data;

	static uint8_t n[IRQ_COUNT];

	for (int i = 0; i < ARRAY_SIZE(n); i++) {
	n[i] = i;
	data->irq_registered_ports[i].dev = NULL;
	}

	FOR_EACH(RZT2M_INIT_IRQ, (), LISTIFY(NS_IRQ_COUNT, RZT2M_GPIO_VALUE_IDENTITY, (,)))

	return 0;
	}

	DEVICE_DT_DEFINE(DT_INST(0, renesas_rzt2m_gpio_common),
	rzt2m_gpio_common_init,
	NULL,
	&rzt2m_gpio_common_data_inst, NULL,
	PRE_KERNEL_1, CONFIG_GPIO_INIT_PRIORITY,
	NULL);

	#define VALUE_2X(i, _) UTIL_X2(i)

	#define PIN_IRQ_INITIALIZER(idx, inst) \
	COND_CODE_1(DT_INST_PROP_HAS_IDX(inst, irqs, idx), \
	([DT_INST_PROP_BY_IDX(inst, irqs, idx)] = \
	DT_INST_PROP_BY_IDX(inst, irqs, UTIL_INC(idx)) + 1,), \
	())

	#define PORT_IRQS_INITIALIZER(inst) \
	FOR_EACH_FIXED_ARG(PIN_IRQ_INITIALIZER, (), inst, \
	LISTIFY(DT_INST_PROP_LEN_OR(inst, irqs, 0), VALUE_2X, (,)))

	#define RZT2M_GPIO_DEFINE(inst) \
	static struct rzt2m_gpio_data rzt2m_gpio_data##inst; \
	static struct rzt2m_gpio_config rzt2m_gpio_config##inst = { \
	.port_nsr = (uint8_t *)DT_REG_ADDR_BY_NAME(DT_INST_GPARENT(inst), port_nsr), \
	.ptadr = (uint8_t *)DT_REG_ADDR_BY_NAME(DT_INST_GPARENT(inst), ptadr), \
	.port = DT_INST_REG_ADDR(inst), \
	.pin_irqs = {PORT_IRQS_INITIALIZER(inst)}, \
	.common = {.port_pin_mask = GPIO_PORT_PIN_MASK_FROM_DT_INST(inst)}}; \
	DEVICE_DT_INST_DEFINE(inst, rzt2m_gpio_init, NULL, &rzt2m_gpio_data##inst, \
	&rzt2m_gpio_config##inst, PRE_KERNEL_1, CONFIG_GPIO_INIT_PRIORITY, \
	&rzt2m_gpio_driver_api);

	DT_INST_FOREACH_STATUS_OKAY(RZT2M_GPIO_DEFINE)