drivers/gpio/gpio_eos_s3.c - third_party/github/zephyrproject-rtos/zephyr - Git at Google

 /*
  * Copyright (c) 2020, Antmicro <www.antmicro.com>
  *
  * SPDX-License-Identifier: Apache-2.0
  */

 #define DT_DRV_COMPAT quicklogic_eos_s3_gpio

 #include <errno.h>
 #include <zephyr/drivers/gpio.h>
 #include <zephyr/irq.h>
 #include <soc.h>
 #include <eoss3_hal_gpio.h>
 #include <eoss3_hal_pads.h>
 #include <eoss3_hal_pad_config.h>

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

 #define MAX_GPIOS		8U
 #define GPIOS_MASK		(BIT(MAX_GPIOS) - 1)
 #define DISABLED_GPIO_IRQ	0xFFU

 struct gpio_eos_s3_config {
 	/* gpio_driver_config needs to be first */
 	struct gpio_driver_config common;
 	/* Pin configuration to determine whether use primary
 	 * or secondary pin for a target GPIO. Secondary pin is used
 	 * when the proper bit is set to 1.
 	 *
 	 * bit_index : primary_pin_number / secondary_pin_number
 	 *
 	 * 0 : 6 / 24
 	 * 1 : 9 / 26
 	 * 2 : 11 / 28
 	 * 3 : 14 / 30
 	 * 4 : 18 / 31
 	 * 5 : 21 / 36
 	 * 6 : 22 / 38
 	 * 7 : 23 / 45
 	 */
 	uint8_t pin_secondary_config;
 };

 struct gpio_eos_s3_data {
 	/* gpio_driver_data needs to be first */
 	struct gpio_driver_data common;
 	/* port ISR callback routine address */
 	sys_slist_t callbacks;
 	/* array of interrupts mapped to the gpio number */
 	uint8_t gpio_irqs[MAX_GPIOS];
 };

 /* Connection table to configure GPIOs with pads */
 static const PadConfig pad_configs[] = {
 	{.ucPin = PAD_6, .ucFunc = PAD6_FUNC_SEL_GPIO_0},
 	{.ucPin = PAD_9, .ucFunc = PAD9_FUNC_SEL_GPIO_1},
 	{.ucPin = PAD_11, .ucFunc = PAD11_FUNC_SEL_GPIO_2},
 	{.ucPin = PAD_14, .ucFunc = PAD14_FUNC_SEL_GPIO_3},
 	{.ucPin = PAD_18, .ucFunc = PAD18_FUNC_SEL_GPIO_4},
 	{.ucPin = PAD_21, .ucFunc = PAD21_FUNC_SEL_GPIO_5},
 	{.ucPin = PAD_22, .ucFunc = PAD22_FUNC_SEL_GPIO_6},
 	{.ucPin = PAD_23, .ucFunc = PAD23_FUNC_SEL_GPIO_7},
 	{.ucPin = PAD_24, .ucFunc = PAD24_FUNC_SEL_GPIO_0},
 	{.ucPin = PAD_26, .ucFunc = PAD26_FUNC_SEL_GPIO_1},
 	{.ucPin = PAD_28, .ucFunc = PAD28_FUNC_SEL_GPIO_2},
 	{.ucPin = PAD_30, .ucFunc = PAD30_FUNC_SEL_GPIO_3},
 	{.ucPin = PAD_31, .ucFunc = PAD31_FUNC_SEL_GPIO_4},
 	{.ucPin = PAD_36, .ucFunc = PAD36_FUNC_SEL_GPIO_5},
 	{.ucPin = PAD_38, .ucFunc = PAD38_FUNC_SEL_GPIO_6},
 	{.ucPin = PAD_45, .ucFunc = PAD45_FUNC_SEL_GPIO_7},
 };

 static PadConfig gpio_eos_s3_pad_select(const struct device *dev,
 					 uint8_t gpio_num)
 {
 	const struct gpio_eos_s3_config *config = dev->config;
 	uint8_t is_secondary = (config->pin_secondary_config >> gpio_num) & 1;

 	return pad_configs[(MAX_GPIOS * is_secondary) + gpio_num];
 }

 /* This function maps pad number to IRQ number */
 static int gpio_eos_s3_get_irq_num(uint8_t pad)
 {
 	int gpio_irq_num;

 	switch (pad) {
 	case PAD_6:
 		gpio_irq_num = 1;
 		break;
 	case PAD_9:
 		gpio_irq_num = 3;
 		break;
 	case PAD_11:
 		gpio_irq_num = 5;
 		break;
 	case PAD_14:
 		gpio_irq_num = 5;
 		break;
 	case PAD_18:
 		gpio_irq_num = 1;
 		break;
 	case PAD_21:
 		gpio_irq_num = 2;
 		break;
 	case PAD_22:
 		gpio_irq_num = 3;
 		break;
 	case PAD_23:
 		gpio_irq_num = 7;
 		break;
 	case PAD_24:
 		gpio_irq_num = 1;
 		break;
 	case PAD_26:
 		gpio_irq_num = 4;
 		break;
 	case PAD_28:
 		gpio_irq_num = 3;
 		break;
 	case PAD_30:
 		gpio_irq_num = 5;
 		break;
 	case PAD_31:
 		gpio_irq_num = 6;
 		break;
 	case PAD_36:
 		gpio_irq_num = 1;
 		break;
 	case PAD_38:
 		gpio_irq_num = 2;
 		break;
 	case PAD_45:
 		gpio_irq_num = 5;
 		break;
 	default:
 		return -EINVAL;
 	}

 	return gpio_irq_num;
 }

 static int gpio_eos_s3_configure(const struct device *dev,
 				 gpio_pin_t gpio_num,
 				 gpio_flags_t flags)
 {
 	uint32_t *io_mux = (uint32_t *)IO_MUX;
 	GPIOCfgTypeDef gpio_cfg;
 	PadConfig pad_config = gpio_eos_s3_pad_select(dev, gpio_num);

 	if (flags & GPIO_SINGLE_ENDED) {
 		return -ENOTSUP;
 	}

 	gpio_cfg.ucGpioNum = gpio_num;
 	gpio_cfg.xPadConf = &pad_config;

 	/* Configure PAD */
 	if (flags & GPIO_PULL_UP) {
 		gpio_cfg.xPadConf->ucPull = PAD_PULLUP;
 	} else if (flags & GPIO_PULL_DOWN) {
 		gpio_cfg.xPadConf->ucPull = PAD_PULLDOWN;
 	} else {
 		/* High impedance */
 		gpio_cfg.xPadConf->ucPull = PAD_NOPULL;
 	}

 	if ((flags & GPIO_INPUT) != 0) {
 		gpio_cfg.xPadConf->ucMode = PAD_MODE_INPUT_EN;
 		gpio_cfg.xPadConf->ucSmtTrg = PAD_SMT_TRIG_EN;
 	}

 	if ((flags & GPIO_OUTPUT) != 0) {
 		if ((flags & GPIO_OUTPUT_INIT_HIGH) != 0) {
 			MISC_CTRL->IO_OUTPUT |= (BIT(gpio_num) & GPIOS_MASK);
 		} else if ((flags & GPIO_OUTPUT_INIT_LOW) != 0) {
 			MISC_CTRL->IO_OUTPUT &= ~(BIT(gpio_num) & GPIOS_MASK);
 		}
 		gpio_cfg.xPadConf->ucMode = PAD_MODE_OUTPUT_EN;
 	}

 	if (flags == GPIO_DISCONNECTED) {
 		gpio_cfg.xPadConf->ucMode = PAD_MODE_INPUT_EN;
 		gpio_cfg.xPadConf->ucSmtTrg = PAD_SMT_TRIG_DIS;
 	}

 	/* Initial PAD configuration */
 	HAL_PAD_Config(gpio_cfg.xPadConf);

 	/* Override direction setup to support bidirectional config */
 	if ((flags & GPIO_DIR_MASK) == (GPIO_INPUT | GPIO_OUTPUT)) {
 		io_mux += gpio_cfg.xPadConf->ucPin;
 		*io_mux &= ~PAD_OEN_DISABLE;
 		*io_mux |= PAD_REN_ENABLE;
 	}

 	return 0;
 }

 static int gpio_eos_s3_port_get_raw(const struct device *dev,
 				    uint32_t *value)
 {
 	ARG_UNUSED(dev);

 	*value = (MISC_CTRL->IO_INPUT & GPIOS_MASK);

 	return 0;
 }

 static int gpio_eos_s3_port_set_masked_raw(const struct device *dev,
 					   uint32_t mask,
 					   uint32_t value)
 {
 	ARG_UNUSED(dev);
 	uint32_t target_value;
 	uint32_t output_states = MISC_CTRL->IO_OUTPUT;

 	target_value = ((output_states & ~mask) | (value & mask));
 	MISC_CTRL->IO_OUTPUT = (target_value & GPIOS_MASK);

 	return 0;
 }

 static int gpio_eos_s3_port_set_bits_raw(const struct device *dev,
 					 uint32_t mask)
 {
 	ARG_UNUSED(dev);

 	MISC_CTRL->IO_OUTPUT |= (mask & GPIOS_MASK);

 	return 0;
 }

 static int gpio_eos_s3_port_clear_bits_raw(const struct device *dev,
 					   uint32_t mask)
 {
 	ARG_UNUSED(dev);

 	MISC_CTRL->IO_OUTPUT &= ~(mask & GPIOS_MASK);

 	return 0;
 }

 static int gpio_eos_s3_port_toggle_bits(const struct device *dev,
 					uint32_t mask)
 {
 	ARG_UNUSED(dev);
 	uint32_t target_value;
 	uint32_t output_states = MISC_CTRL->IO_OUTPUT;

 	target_value = output_states ^ mask;
 	MISC_CTRL->IO_OUTPUT = (target_value & GPIOS_MASK);

 	return 0;
 }

 static int gpio_eos_s3_manage_callback(const struct device *dev,
 				       struct gpio_callback *callback, bool set)
 {
 	struct gpio_eos_s3_data *data = dev->data;

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

 static int gpio_eos_s3_pin_interrupt_configure(const struct device *dev,
 					       gpio_pin_t gpio_num,
 					       enum gpio_int_mode mode,
 					       enum gpio_int_trig trig)
 {
 	struct gpio_eos_s3_data *data = dev->data;
 	GPIOCfgTypeDef gpio_cfg;
 	PadConfig pad_config = gpio_eos_s3_pad_select(dev, gpio_num);

 	gpio_cfg.ucGpioNum = gpio_num;
 	gpio_cfg.xPadConf = &pad_config;

 	if (mode == GPIO_INT_MODE_DISABLED) {
 		/* Get IRQ number which should be disabled */
 		int irq_num = gpio_eos_s3_get_irq_num(pad_config.ucPin);

 		if (irq_num < 0) {
 			return -EINVAL;
 		}

 		/* Disable IRQ */
 		INTR_CTRL->GPIO_INTR_EN_M4 &= ~BIT((uint32_t)irq_num);

 		/* Mark corresponding IRQ number as disabled */
 		data->gpio_irqs[irq_num] = DISABLED_GPIO_IRQ;

 		/* Clear configuration */
 		INTR_CTRL->GPIO_INTR_TYPE &= ~((uint32_t)(BIT(irq_num)));
 		INTR_CTRL->GPIO_INTR_POL &= ~((uint32_t)(BIT(irq_num)));
 	} else {
 		/* Prepare configuration */
 		if (mode == GPIO_INT_MODE_LEVEL) {
 			gpio_cfg.intr_type = LEVEL_TRIGGERED;
 			if (trig == GPIO_INT_TRIG_LOW) {
 				gpio_cfg.pol_type = FALL_LOW;
 			} else {
 				gpio_cfg.pol_type = RISE_HIGH;
 			}
 		} else {
 			gpio_cfg.intr_type = EDGE_TRIGGERED;
 			switch (trig) {
 			case GPIO_INT_TRIG_LOW:
 				gpio_cfg.pol_type = FALL_LOW;
 				break;
 			case GPIO_INT_TRIG_HIGH:
 				gpio_cfg.pol_type = RISE_HIGH;
 				break;
 			case GPIO_INT_TRIG_BOTH:
 				return -ENOTSUP;
 			default:
 				return -EINVAL;
 			}
 		}

 		/* Set IRQ configuration */
 		int irq_num = HAL_GPIO_IntrCfg(&gpio_cfg);

 		if (irq_num < 0) {
 			return -EINVAL;
 		}

 		/* Set corresponding IRQ number as enabled */
 		data->gpio_irqs[irq_num] = gpio_num;

 		/* Clear pending GPIO interrupts */
 		INTR_CTRL->GPIO_INTR |=  BIT((uint32_t)irq_num);

 		/* Enable IRQ */
 		INTR_CTRL->GPIO_INTR_EN_M4 |= BIT((uint32_t)irq_num);
 	}

 	return 0;
 }

 static void gpio_eos_s3_isr(const struct device *dev)
 {
 	struct gpio_eos_s3_data *data = dev->data;
 	/* Level interrupts can be only checked from read-only GPIO_INTR_RAW,
 	 * we need to add it to the intr_status.
 	 */
 	uint32_t intr_status = (INTR_CTRL->GPIO_INTR | INTR_CTRL->GPIO_INTR_RAW);

 	/* Clear pending GPIO interrupts */
 	INTR_CTRL->GPIO_INTR |= intr_status;

 	/* Fire callbacks */
 	for (int irq_num = 0; irq_num < MAX_GPIOS; irq_num++) {
 		if (data->gpio_irqs[irq_num] != DISABLED_GPIO_IRQ) {
 			gpio_fire_callbacks(&data->callbacks,
 					    dev, BIT(data->gpio_irqs[irq_num]));
 		}
 	}
 }

 #ifdef CONFIG_GPIO_GET_DIRECTION
 static int gpio_eos_s3_port_get_direction(const struct device *port, gpio_port_pins_t map,
 					  gpio_port_pins_t *inputs, gpio_port_pins_t *outputs)
 {
 	uint32_t pin;
 	PadConfig pad_config;
 	gpio_port_pins_t ip = 0;
 	gpio_port_pins_t op = 0;
 	const struct gpio_eos_s3_config *config = dev->config;

 	map &= config->common.port_pin_mask;

 	if (inputs != NULL) {
 		for (pin = find_lsb_set(pins) - 1; pins;
 		     pins &= ~BIT(pin), pin = find_lsb_set(pins) - 1) {
 			pad_config = gpio_eos_s3_pad_select(port, pin);
 			ip |= (pad_config.ucMode == PAD_MODE_INPUT_EN &&
 			       pad_config.ucSmtTrg == PAD_SMT_TRIG_EN) *
 			      BIT(pin);
 		}

 		*inputs = ip;
 	}

 	if (outputs != NULL) {
 		for (pin = find_lsb_set(pins) - 1; pins;
 		     pins &= ~BIT(pin), pin = find_lsb_set(pins) - 1) {
 			pad_config = gpio_eos_s3_pad_select(port, pin);
 			op |= (pad_config.ucMode == PAD_MODE_OUTPUT_EN) * BIT(pin);
 		}

 		*outputs = op;
 	}

 	return 0;
 }
 #endif /* CONFIG_GPIO_GET_DIRECTION */

 static DEVICE_API(gpio, gpio_eos_s3_driver_api) = {
 	.pin_configure = gpio_eos_s3_configure,
 	.port_get_raw = gpio_eos_s3_port_get_raw,
 	.port_set_masked_raw = gpio_eos_s3_port_set_masked_raw,
 	.port_set_bits_raw = gpio_eos_s3_port_set_bits_raw,
 	.port_clear_bits_raw = gpio_eos_s3_port_clear_bits_raw,
 	.port_toggle_bits = gpio_eos_s3_port_toggle_bits,
 	.pin_interrupt_configure = gpio_eos_s3_pin_interrupt_configure,
 	.manage_callback = gpio_eos_s3_manage_callback,
 #ifdef CONFIG_GPIO_GET_DIRECTION
 	.port_get_direction = gpio_eos_s3_port_get_direction,
 #endif /* CONFIG_GPIO_GET_DIRECTION */
 };

 static int gpio_eos_s3_init(const struct device *dev)
 {
 	ARG_UNUSED(dev);
 	IRQ_CONNECT(DT_INST_IRQN(0),
 		    DT_INST_IRQ(0, priority),
 		    gpio_eos_s3_isr,
 		    DEVICE_DT_INST_GET(0),
 		    0);

 	irq_enable(DT_INST_IRQN(0));

 	return 0;
 }

 const struct gpio_eos_s3_config gpio_eos_s3_config = {
 	.common = {
 		.port_pin_mask = GPIO_PORT_PIN_MASK_FROM_DT_INST(0),
 	},
 	.pin_secondary_config = DT_INST_PROP(0, pin_secondary_config),
 };

 static struct gpio_eos_s3_data gpio_eos_s3_data = {
 	.gpio_irqs = {
 		DISABLED_GPIO_IRQ,
 		DISABLED_GPIO_IRQ,
 		DISABLED_GPIO_IRQ,
 		DISABLED_GPIO_IRQ,
 		DISABLED_GPIO_IRQ,
 		DISABLED_GPIO_IRQ,
 		DISABLED_GPIO_IRQ,
 		DISABLED_GPIO_IRQ
 	},
 };

 DEVICE_DT_INST_DEFINE(0,
 		    gpio_eos_s3_init,
 		    NULL,
 		    &gpio_eos_s3_data,
 		    &gpio_eos_s3_config,
 		    PRE_KERNEL_1,
 		    CONFIG_GPIO_INIT_PRIORITY,
 		    &gpio_eos_s3_driver_api);
	/*
	* Copyright (c) 2020, Antmicro <www.antmicro.com>
	*
	* SPDX-License-Identifier: Apache-2.0
	*/

	#define DT_DRV_COMPAT quicklogic_eos_s3_gpio

	#include <errno.h>
	#include <zephyr/drivers/gpio.h>
	#include <zephyr/irq.h>
	#include <soc.h>
	#include <eoss3_hal_gpio.h>
	#include <eoss3_hal_pads.h>
	#include <eoss3_hal_pad_config.h>

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

	#define MAX_GPIOS 8U
	#define GPIOS_MASK (BIT(MAX_GPIOS) - 1)
	#define DISABLED_GPIO_IRQ 0xFFU

	struct gpio_eos_s3_config {
	/* gpio_driver_config needs to be first */
	struct gpio_driver_config common;
	/* Pin configuration to determine whether use primary
	* or secondary pin for a target GPIO. Secondary pin is used
	* when the proper bit is set to 1.
	*
	* bit_index : primary_pin_number / secondary_pin_number
	*
	* 0 : 6 / 24
	* 1 : 9 / 26
	* 2 : 11 / 28
	* 3 : 14 / 30
	* 4 : 18 / 31
	* 5 : 21 / 36
	* 6 : 22 / 38
	* 7 : 23 / 45
	*/
	uint8_t pin_secondary_config;
	};

	struct gpio_eos_s3_data {
	/* gpio_driver_data needs to be first */
	struct gpio_driver_data common;
	/* port ISR callback routine address */
	sys_slist_t callbacks;
	/* array of interrupts mapped to the gpio number */
	uint8_t gpio_irqs[MAX_GPIOS];
	};

	/* Connection table to configure GPIOs with pads */
	static const PadConfig pad_configs[] = {
	{.ucPin = PAD_6, .ucFunc = PAD6_FUNC_SEL_GPIO_0},
	{.ucPin = PAD_9, .ucFunc = PAD9_FUNC_SEL_GPIO_1},
	{.ucPin = PAD_11, .ucFunc = PAD11_FUNC_SEL_GPIO_2},
	{.ucPin = PAD_14, .ucFunc = PAD14_FUNC_SEL_GPIO_3},
	{.ucPin = PAD_18, .ucFunc = PAD18_FUNC_SEL_GPIO_4},
	{.ucPin = PAD_21, .ucFunc = PAD21_FUNC_SEL_GPIO_5},
	{.ucPin = PAD_22, .ucFunc = PAD22_FUNC_SEL_GPIO_6},
	{.ucPin = PAD_23, .ucFunc = PAD23_FUNC_SEL_GPIO_7},
	{.ucPin = PAD_24, .ucFunc = PAD24_FUNC_SEL_GPIO_0},
	{.ucPin = PAD_26, .ucFunc = PAD26_FUNC_SEL_GPIO_1},
	{.ucPin = PAD_28, .ucFunc = PAD28_FUNC_SEL_GPIO_2},
	{.ucPin = PAD_30, .ucFunc = PAD30_FUNC_SEL_GPIO_3},
	{.ucPin = PAD_31, .ucFunc = PAD31_FUNC_SEL_GPIO_4},
	{.ucPin = PAD_36, .ucFunc = PAD36_FUNC_SEL_GPIO_5},
	{.ucPin = PAD_38, .ucFunc = PAD38_FUNC_SEL_GPIO_6},
	{.ucPin = PAD_45, .ucFunc = PAD45_FUNC_SEL_GPIO_7},
	};

	static PadConfig gpio_eos_s3_pad_select(const struct device *dev,
	uint8_t gpio_num)
	{
	const struct gpio_eos_s3_config *config = dev->config;
	uint8_t is_secondary = (config->pin_secondary_config >> gpio_num) & 1;

	return pad_configs[(MAX_GPIOS * is_secondary) + gpio_num];
	}

	/* This function maps pad number to IRQ number */
	static int gpio_eos_s3_get_irq_num(uint8_t pad)
	{
	int gpio_irq_num;

	switch (pad) {
	case PAD_6:
	gpio_irq_num = 1;
	break;
	case PAD_9:
	gpio_irq_num = 3;
	break;
	case PAD_11:
	gpio_irq_num = 5;
	break;
	case PAD_14:
	gpio_irq_num = 5;
	break;
	case PAD_18:
	gpio_irq_num = 1;
	break;
	case PAD_21:
	gpio_irq_num = 2;
	break;
	case PAD_22:
	gpio_irq_num = 3;
	break;
	case PAD_23:
	gpio_irq_num = 7;
	break;
	case PAD_24:
	gpio_irq_num = 1;
	break;
	case PAD_26:
	gpio_irq_num = 4;
	break;
	case PAD_28:
	gpio_irq_num = 3;
	break;
	case PAD_30:
	gpio_irq_num = 5;
	break;
	case PAD_31:
	gpio_irq_num = 6;
	break;
	case PAD_36:
	gpio_irq_num = 1;
	break;
	case PAD_38:
	gpio_irq_num = 2;
	break;
	case PAD_45:
	gpio_irq_num = 5;
	break;
	default:
	return -EINVAL;
	}

	return gpio_irq_num;
	}

	static int gpio_eos_s3_configure(const struct device *dev,
	gpio_pin_t gpio_num,
	gpio_flags_t flags)
	{
	uint32_t io_mux = (uint32_t )IO_MUX;
	GPIOCfgTypeDef gpio_cfg;
	PadConfig pad_config = gpio_eos_s3_pad_select(dev, gpio_num);

	if (flags & GPIO_SINGLE_ENDED) {
	return -ENOTSUP;
	}

	gpio_cfg.ucGpioNum = gpio_num;
	gpio_cfg.xPadConf = &pad_config;

	/* Configure PAD */
	if (flags & GPIO_PULL_UP) {
	gpio_cfg.xPadConf->ucPull = PAD_PULLUP;
	} else if (flags & GPIO_PULL_DOWN) {
	gpio_cfg.xPadConf->ucPull = PAD_PULLDOWN;
	} else {
	/* High impedance */
	gpio_cfg.xPadConf->ucPull = PAD_NOPULL;
	}

	if ((flags & GPIO_INPUT) != 0) {
	gpio_cfg.xPadConf->ucMode = PAD_MODE_INPUT_EN;
	gpio_cfg.xPadConf->ucSmtTrg = PAD_SMT_TRIG_EN;
	}

	if ((flags & GPIO_OUTPUT) != 0) {
	if ((flags & GPIO_OUTPUT_INIT_HIGH) != 0) {
	MISC_CTRL->IO_OUTPUT \|= (BIT(gpio_num) & GPIOS_MASK);
	} else if ((flags & GPIO_OUTPUT_INIT_LOW) != 0) {
	MISC_CTRL->IO_OUTPUT &= ~(BIT(gpio_num) & GPIOS_MASK);
	}
	gpio_cfg.xPadConf->ucMode = PAD_MODE_OUTPUT_EN;
	}

	if (flags == GPIO_DISCONNECTED) {
	gpio_cfg.xPadConf->ucMode = PAD_MODE_INPUT_EN;
	gpio_cfg.xPadConf->ucSmtTrg = PAD_SMT_TRIG_DIS;
	}

	/* Initial PAD configuration */
	HAL_PAD_Config(gpio_cfg.xPadConf);

	/* Override direction setup to support bidirectional config */
	if ((flags & GPIO_DIR_MASK) == (GPIO_INPUT \| GPIO_OUTPUT)) {
	io_mux += gpio_cfg.xPadConf->ucPin;
	*io_mux &= ~PAD_OEN_DISABLE;
	*io_mux \|= PAD_REN_ENABLE;
	}

	return 0;
	}

	static int gpio_eos_s3_port_get_raw(const struct device *dev,
	uint32_t *value)
	{
	ARG_UNUSED(dev);

	*value = (MISC_CTRL->IO_INPUT & GPIOS_MASK);

	return 0;
	}

	static int gpio_eos_s3_port_set_masked_raw(const struct device *dev,
	uint32_t mask,
	uint32_t value)
	{
	ARG_UNUSED(dev);
	uint32_t target_value;
	uint32_t output_states = MISC_CTRL->IO_OUTPUT;

	target_value = ((output_states & ~mask) \| (value & mask));
	MISC_CTRL->IO_OUTPUT = (target_value & GPIOS_MASK);

	return 0;
	}

	static int gpio_eos_s3_port_set_bits_raw(const struct device *dev,
	uint32_t mask)
	{
	ARG_UNUSED(dev);

	MISC_CTRL->IO_OUTPUT \|= (mask & GPIOS_MASK);

	return 0;
	}

	static int gpio_eos_s3_port_clear_bits_raw(const struct device *dev,
	uint32_t mask)
	{
	ARG_UNUSED(dev);

	MISC_CTRL->IO_OUTPUT &= ~(mask & GPIOS_MASK);

	return 0;
	}

	static int gpio_eos_s3_port_toggle_bits(const struct device *dev,
	uint32_t mask)
	{
	ARG_UNUSED(dev);
	uint32_t target_value;
	uint32_t output_states = MISC_CTRL->IO_OUTPUT;

	target_value = output_states ^ mask;
	MISC_CTRL->IO_OUTPUT = (target_value & GPIOS_MASK);

	return 0;
	}

	static int gpio_eos_s3_manage_callback(const struct device *dev,
	struct gpio_callback *callback, bool set)
	{
	struct gpio_eos_s3_data *data = dev->data;

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

	static int gpio_eos_s3_pin_interrupt_configure(const struct device *dev,
	gpio_pin_t gpio_num,
	enum gpio_int_mode mode,
	enum gpio_int_trig trig)
	{
	struct gpio_eos_s3_data *data = dev->data;
	GPIOCfgTypeDef gpio_cfg;
	PadConfig pad_config = gpio_eos_s3_pad_select(dev, gpio_num);

	gpio_cfg.ucGpioNum = gpio_num;
	gpio_cfg.xPadConf = &pad_config;

	if (mode == GPIO_INT_MODE_DISABLED) {
	/* Get IRQ number which should be disabled */
	int irq_num = gpio_eos_s3_get_irq_num(pad_config.ucPin);

	if (irq_num < 0) {
	return -EINVAL;
	}

	/* Disable IRQ */
	INTR_CTRL->GPIO_INTR_EN_M4 &= ~BIT((uint32_t)irq_num);

	/* Mark corresponding IRQ number as disabled */
	data->gpio_irqs[irq_num] = DISABLED_GPIO_IRQ;

	/* Clear configuration */
	INTR_CTRL->GPIO_INTR_TYPE &= ~((uint32_t)(BIT(irq_num)));
	INTR_CTRL->GPIO_INTR_POL &= ~((uint32_t)(BIT(irq_num)));
	} else {
	/* Prepare configuration */
	if (mode == GPIO_INT_MODE_LEVEL) {
	gpio_cfg.intr_type = LEVEL_TRIGGERED;
	if (trig == GPIO_INT_TRIG_LOW) {
	gpio_cfg.pol_type = FALL_LOW;
	} else {
	gpio_cfg.pol_type = RISE_HIGH;
	}
	} else {
	gpio_cfg.intr_type = EDGE_TRIGGERED;
	switch (trig) {
	case GPIO_INT_TRIG_LOW:
	gpio_cfg.pol_type = FALL_LOW;
	break;
	case GPIO_INT_TRIG_HIGH:
	gpio_cfg.pol_type = RISE_HIGH;
	break;
	case GPIO_INT_TRIG_BOTH:
	return -ENOTSUP;
	default:
	return -EINVAL;
	}
	}

	/* Set IRQ configuration */
	int irq_num = HAL_GPIO_IntrCfg(&gpio_cfg);

	if (irq_num < 0) {
	return -EINVAL;
	}

	/* Set corresponding IRQ number as enabled */
	data->gpio_irqs[irq_num] = gpio_num;

	/* Clear pending GPIO interrupts */
	INTR_CTRL->GPIO_INTR \|= BIT((uint32_t)irq_num);

	/* Enable IRQ */
	INTR_CTRL->GPIO_INTR_EN_M4 \|= BIT((uint32_t)irq_num);
	}

	return 0;
	}

	static void gpio_eos_s3_isr(const struct device *dev)
	{
	struct gpio_eos_s3_data *data = dev->data;
	/* Level interrupts can be only checked from read-only GPIO_INTR_RAW,
	* we need to add it to the intr_status.
	*/
	uint32_t intr_status = (INTR_CTRL->GPIO_INTR \| INTR_CTRL->GPIO_INTR_RAW);

	/* Clear pending GPIO interrupts */
	INTR_CTRL->GPIO_INTR \|= intr_status;

	/* Fire callbacks */
	for (int irq_num = 0; irq_num < MAX_GPIOS; irq_num++) {
	if (data->gpio_irqs[irq_num] != DISABLED_GPIO_IRQ) {
	gpio_fire_callbacks(&data->callbacks,
	dev, BIT(data->gpio_irqs[irq_num]));
	}
	}
	}

	#ifdef CONFIG_GPIO_GET_DIRECTION
	static int gpio_eos_s3_port_get_direction(const struct device *port, gpio_port_pins_t map,
	gpio_port_pins_t inputs, gpio_port_pins_t outputs)
	{
	uint32_t pin;
	PadConfig pad_config;
	gpio_port_pins_t ip = 0;
	gpio_port_pins_t op = 0;
	const struct gpio_eos_s3_config *config = dev->config;

	map &= config->common.port_pin_mask;

	if (inputs != NULL) {
	for (pin = find_lsb_set(pins) - 1; pins;
	pins &= ~BIT(pin), pin = find_lsb_set(pins) - 1) {
	pad_config = gpio_eos_s3_pad_select(port, pin);
	ip \|= (pad_config.ucMode == PAD_MODE_INPUT_EN &&
	pad_config.ucSmtTrg == PAD_SMT_TRIG_EN) *
	BIT(pin);
	}

	*inputs = ip;
	}

	if (outputs != NULL) {
	for (pin = find_lsb_set(pins) - 1; pins;
	pins &= ~BIT(pin), pin = find_lsb_set(pins) - 1) {
	pad_config = gpio_eos_s3_pad_select(port, pin);
	op \|= (pad_config.ucMode == PAD_MODE_OUTPUT_EN) * BIT(pin);
	}

	*outputs = op;
	}

	return 0;
	}
	#endif /* CONFIG_GPIO_GET_DIRECTION */

	static DEVICE_API(gpio, gpio_eos_s3_driver_api) = {
	.pin_configure = gpio_eos_s3_configure,
	.port_get_raw = gpio_eos_s3_port_get_raw,
	.port_set_masked_raw = gpio_eos_s3_port_set_masked_raw,
	.port_set_bits_raw = gpio_eos_s3_port_set_bits_raw,
	.port_clear_bits_raw = gpio_eos_s3_port_clear_bits_raw,
	.port_toggle_bits = gpio_eos_s3_port_toggle_bits,
	.pin_interrupt_configure = gpio_eos_s3_pin_interrupt_configure,
	.manage_callback = gpio_eos_s3_manage_callback,
	#ifdef CONFIG_GPIO_GET_DIRECTION
	.port_get_direction = gpio_eos_s3_port_get_direction,
	#endif /* CONFIG_GPIO_GET_DIRECTION */
	};

	static int gpio_eos_s3_init(const struct device *dev)
	{
	ARG_UNUSED(dev);
	IRQ_CONNECT(DT_INST_IRQN(0),
	DT_INST_IRQ(0, priority),
	gpio_eos_s3_isr,
	DEVICE_DT_INST_GET(0),
	0);

	irq_enable(DT_INST_IRQN(0));

	return 0;
	}

	const struct gpio_eos_s3_config gpio_eos_s3_config = {
	.common = {
	.port_pin_mask = GPIO_PORT_PIN_MASK_FROM_DT_INST(0),
	},
	.pin_secondary_config = DT_INST_PROP(0, pin_secondary_config),
	};

	static struct gpio_eos_s3_data gpio_eos_s3_data = {
	.gpio_irqs = {
	DISABLED_GPIO_IRQ,
	DISABLED_GPIO_IRQ,
	DISABLED_GPIO_IRQ,
	DISABLED_GPIO_IRQ,
	DISABLED_GPIO_IRQ,
	DISABLED_GPIO_IRQ,
	DISABLED_GPIO_IRQ,
	DISABLED_GPIO_IRQ
	},
	};

	DEVICE_DT_INST_DEFINE(0,
	gpio_eos_s3_init,
	NULL,
	&gpio_eos_s3_data,
	&gpio_eos_s3_config,
	PRE_KERNEL_1,
	CONFIG_GPIO_INIT_PRIORITY,
	&gpio_eos_s3_driver_api);