drivers/serial/uart_nxp_s32_linflexd.c - third_party/github/zephyrproject-rtos/zephyr - Git at Google

 /*
  * Copyright 2022 NXP
  *
  * SPDX-License-Identifier: Apache-2.0
  */

 #include <zephyr/irq.h>
 #include <zephyr/drivers/uart.h>
 #include <zephyr/drivers/pinctrl.h>

 #include <Linflexd_Uart_Ip.h>
 #include <Linflexd_Uart_Ip_Irq.h>
 #include "uart_nxp_s32_linflexd.h"

 static int uart_nxp_s32_err_check(const struct device *dev)
 {
 	const struct uart_nxp_s32_config *config = dev->config;
 	Linflexd_Uart_Ip_StatusType status;
 	int err = 0;

 	status = Linflexd_Uart_Ip_GetReceiveStatus(config->instance, NULL);

 	if (status == LINFLEXD_UART_IP_STATUS_RX_OVERRUN) {
 		err |= UART_ERROR_OVERRUN;
 	}

 	if (status == LINFLEXD_UART_IP_STATUS_PARITY_ERROR) {
 		err |= UART_ERROR_PARITY;
 	}

 	if (status == LINFLEXD_UART_IP_STATUS_FRAMING_ERROR) {
 		err |= UART_ERROR_FRAMING;
 	}

 	return err;
 }

 static void uart_nxp_s32_poll_out(const struct device *dev, unsigned char c)
 {
 	const struct uart_nxp_s32_config *config = dev->config;
 	uint32_t linflexd_ier;
 	uint8_t key;

 	key = irq_lock();

 	/* Save enabled Linflexd's interrupts */
 	linflexd_ier = sys_read32(POINTER_TO_UINT(&config->base->LINIER));

 	Linflexd_Uart_Ip_SyncSend(config->instance, &c, 1,
 				  CONFIG_UART_NXP_S32_POLL_OUT_TIMEOUT);

 	/* Restore Linflexd's interrupts */
 	sys_write32(linflexd_ier, POINTER_TO_UINT(&config->base->LINIER));

 	irq_unlock(key);
 }

 static int uart_nxp_s32_poll_in(const struct device *dev, unsigned char *c)
 {
 	const struct uart_nxp_s32_config *config = dev->config;
 	Linflexd_Uart_Ip_StatusType status;
 	uint32_t linflexd_ier;
 	int ret;

 	status = LINFLEXD_UART_IP_STATUS_SUCCESS;

 	/* Save enabled Linflexd's interrupts */
 	linflexd_ier = sys_read32(POINTER_TO_UINT(&config->base->LINIER));

 	/* Retrieves data with poll method */
 	status = Linflexd_Uart_Ip_SyncReceive(config->instance, c, 1,
 					      CONFIG_UART_NXP_S32_POLL_IN_TIMEOUT);

 	/* Restore Linflexd's interrupts */
 	sys_write32(linflexd_ier, POINTER_TO_UINT(&config->base->LINIER));

 	if (status == LINFLEXD_UART_IP_STATUS_SUCCESS) {
 		ret = 0;
 	} else if (status == LINFLEXD_UART_IP_STATUS_TIMEOUT) {
 		ret = -1;
 	} else {
 		ret = -EBUSY;
 	}

 	return ret;
 }

 #ifdef CONFIG_UART_INTERRUPT_DRIVEN

 static int uart_nxp_s32_fifo_fill(const struct device *dev, const uint8_t *tx_data,
 				  int size)
 {
 	const struct uart_nxp_s32_config *config = dev->config;
 	struct uart_nxp_s32_data *data = dev->data;
 	struct uart_nxp_s32_int *int_data = &(data->int_data);

 	if (int_data->tx_fifo_busy) {
 		return 0;
 	}

 	int_data->tx_fifo_busy = true;

 	Linflexd_Uart_Ip_AsyncSend(config->instance, tx_data, 1);

 	return 1;
 }

 static int uart_nxp_s32_fifo_read(const struct device *dev, uint8_t *rx_data,
 				  const int size)
 {
 	const struct uart_nxp_s32_config *config = dev->config;
 	struct uart_nxp_s32_data *data = dev->data;
 	struct uart_nxp_s32_int *int_data = &(data->int_data);

 	if (int_data->rx_fifo_busy) {
 		return 0;
 	}

 	*rx_data = int_data->rx_fifo_data;
 	int_data->rx_fifo_busy = true;

 	Linflexd_Uart_Ip_SetRxBuffer(config->instance, &(int_data->rx_fifo_data), 1);

 	return 1;
 }

 static void uart_nxp_s32_irq_tx_enable(const struct device *dev)
 {

 	struct uart_nxp_s32_data *data = dev->data;
 	struct uart_nxp_s32_int *int_data = &(data->int_data);
 	uint8_t key;

 	int_data->irq_tx_enable = true;

 	key = irq_lock();

 	/* Callback is called in order to transmit the data */
 	if (!int_data->tx_fifo_busy) {

 		if (data->callback) {
 			data->callback(dev, data->cb_data);
 		}
 	}

 	irq_unlock(key);
 }

 static void uart_nxp_s32_irq_tx_disable(const struct device *dev)
 {
 	const struct uart_nxp_s32_config *config = dev->config;
 	struct uart_nxp_s32_data *data = dev->data;
 	struct uart_nxp_s32_int *int_data = &(data->int_data);

 	int_data->irq_tx_enable = false;
 	int_data->tx_fifo_busy  = false;

 	Linflexd_Uart_Ip_AbortSendingData(config->instance);
 }

 static int uart_nxp_s32_irq_tx_ready(const struct device *dev)
 {
 	struct uart_nxp_s32_data *data = dev->data;
 	struct uart_nxp_s32_int *int_data = &(data->int_data);

 	return !int_data->tx_fifo_busy && int_data->irq_tx_enable;
 }

 static void uart_nxp_s32_irq_rx_enable(const struct device *dev)
 {
 	const struct uart_nxp_s32_config *config = dev->config;
 	struct uart_nxp_s32_data *data = dev->data;
 	struct uart_nxp_s32_int *int_data = &(data->int_data);

 	int_data->irq_rx_enable = true;

 	Linflexd_Uart_Ip_AsyncReceive(config->instance, &(int_data->rx_fifo_data), 1);
 }

 static void uart_nxp_s32_irq_rx_disable(const struct device *dev)
 {
 	const struct uart_nxp_s32_config *config = dev->config;
 	struct uart_nxp_s32_data *data = dev->data;
 	struct uart_nxp_s32_int *int_data = &(data->int_data);

 	int_data->irq_rx_enable = false;
 	int_data->rx_fifo_busy = false;

 	Linflexd_Uart_Ip_AbortReceivingData(config->instance);
 }

 static int uart_nxp_s32_irq_rx_ready(const struct device *dev)
 {
 	struct uart_nxp_s32_data *data = dev->data;
 	struct uart_nxp_s32_int *int_data = &(data->int_data);

 	return !int_data->rx_fifo_busy && int_data->irq_rx_enable;
 }

 static void uart_nxp_s32_irq_err_enable(const struct device *dev)
 {
 	const struct uart_nxp_s32_config *config = dev->config;
 	uint32_t linflexd_ier;

 	linflexd_ier = sys_read32(POINTER_TO_UINT(&config->base->LINIER));

 	/* Enable frame error interrupt and buffer overrun error interrupt */
 	linflexd_ier |= (LINFLEXD_LINIER_FEIE_MASK | LINFLEXD_LINIER_BOIE_MASK);

 	sys_write32(linflexd_ier, POINTER_TO_UINT(&config->base->LINIER));
 }

 static void uart_nxp_s32_irq_err_disable(const struct device *dev)
 {
 	const struct uart_nxp_s32_config *config = dev->config;
 	uint32_t linflexd_ier;

 	linflexd_ier = sys_read32(POINTER_TO_UINT(&config->base->LINIER));

 	/* Disable frame error interrupt and buffer overrun error interrupt */
 	linflexd_ier &= ~(LINFLEXD_LINIER_FEIE_MASK | LINFLEXD_LINIER_BOIE_MASK);

 	sys_write32(linflexd_ier, POINTER_TO_UINT(&config->base->LINIER));
 }

 static int uart_nxp_s32_irq_is_pending(const struct device *dev)
 {
 	return (uart_nxp_s32_irq_tx_ready(dev)) || (uart_nxp_s32_irq_rx_ready(dev));
 }

 static int uart_nxp_s32_irq_update(const struct device *dev)
 {
 	return 1;
 }

 static void uart_nxp_s32_irq_callback_set(const struct device *dev,
 				      uart_irq_callback_user_data_t cb,
 				      void *cb_data)
 {
 	struct uart_nxp_s32_data *data = dev->data;

 	data->callback = cb;
 	data->cb_data = cb_data;
 }

 /**
  * @brief Interrupt service routine.
  *
  * This simply calls the callback function, if one exists.
  *
  * Note: s32 UART Tx interrupts when ready to send; Rx interrupts when char
  * received.
  *
  * @param arg Argument to ISR.
  *
  * @return N/A
  */

 void uart_nxp_s32_isr(const struct device *dev)
 {
 	struct uart_nxp_s32_data *data = dev->data;

 	if (data->callback) {
 		data->callback(dev, data->cb_data);
 	}
 }
 #endif /* CONFIG_UART_INTERRUPT_DRIVEN */

 /**
  * @brief Initialize UART channel
  *
  * This routine is called to reset the chip in a quiescent state.
  * It is assumed that this function is called only once per UART.
  *
  * @param dev UART device struct
  *
  * @return 0
  */
 static int uart_nxp_s32_init(const struct device *dev)
 {
 	const struct uart_nxp_s32_config *config = dev->config;
 	struct uart_nxp_s32_data *data = dev->data;
 	static uint8_t state_idx;
 	uint8_t key;
 	int err;

 	err = pinctrl_apply_state(config->pincfg, PINCTRL_STATE_DEFAULT);
 	if (err < 0) {
 		return err;
 	}

 	key = irq_lock();

 	/* Initialize UART with default configuration */
 	data->hw_cfg.BaudRate = 115200;
 	data->hw_cfg.BaudRateMantissa = 26U;
 	data->hw_cfg.BaudRateFractionalDivisor = 1U;
 	data->hw_cfg.ParityCheck = false;
 	data->hw_cfg.ParityType = LINFLEXD_UART_IP_PARITY_EVEN;
 	data->hw_cfg.StopBitsCount = LINFLEXD_UART_IP_ONE_STOP_BIT;
 	data->hw_cfg.WordLength = LINFLEXD_UART_IP_8_BITS;
 	data->hw_cfg.TransferType = LINFLEXD_UART_IP_USING_INTERRUPTS;
 	data->hw_cfg.Callback = s32_uart_callback;
 	data->hw_cfg.CallbackParam = NULL;
 	data->hw_cfg.StateStruct = &Linflexd_Uart_Ip_apStateStructure[state_idx++];

 	Linflexd_Uart_Ip_Init(config->instance, &data->hw_cfg);

 	irq_unlock(key);

 	return 0;
 }

 static const struct uart_driver_api uart_nxp_s32_driver_api = {
 	.poll_in	  = uart_nxp_s32_poll_in,
 	.poll_out	  = uart_nxp_s32_poll_out,
 	.err_check	  = uart_nxp_s32_err_check,

 #ifdef CONFIG_UART_INTERRUPT_DRIVEN
 	.fifo_fill	  = uart_nxp_s32_fifo_fill,
 	.fifo_read	  = uart_nxp_s32_fifo_read,
 	.irq_tx_enable	  = uart_nxp_s32_irq_tx_enable,
 	.irq_tx_disable   = uart_nxp_s32_irq_tx_disable,
 	.irq_tx_ready	  = uart_nxp_s32_irq_tx_ready,
 	.irq_rx_enable	  = uart_nxp_s32_irq_rx_enable,
 	.irq_rx_disable   = uart_nxp_s32_irq_rx_disable,
 	.irq_rx_ready	  = uart_nxp_s32_irq_rx_ready,
 	.irq_err_enable   = uart_nxp_s32_irq_err_enable,
 	.irq_err_disable  = uart_nxp_s32_irq_err_disable,
 	.irq_is_pending   = uart_nxp_s32_irq_is_pending,
 	.irq_update	  = uart_nxp_s32_irq_update,
 	.irq_callback_set = uart_nxp_s32_irq_callback_set,
 #endif	/* CONFIG_UART_INTERRUPT_DRIVEN */

 };

 #define UART_NXP_S32_NODE(n)	DT_NODELABEL(uart##n)

 #if defined(CONFIG_UART_INTERRUPT_DRIVEN)
 #define UART_NXP_S32_INTERRUPT_DEFINE(n, isr_handler, parameter)	\
 	do {								\
 		IRQ_CONNECT(DT_IRQN(UART_NXP_S32_NODE(n)),		\
 			DT_IRQ(UART_NXP_S32_NODE(n), priority),		\
 			isr_handler,					\
 			parameter,					\
 			DT_IRQ(UART_NXP_S32_NODE(n), flags));		\
 									\
 		irq_enable(DT_IRQN(UART_NXP_S32_NODE(n)));		\
 	} while (0)

 #else
 #define UART_NXP_S32_INTERRUPT_DEFINE(n, isr_handler, parameter)
 #endif

 #define UART_NXP_S32_INIT_DEVICE(n)						\
 	PINCTRL_DT_DEFINE(UART_NXP_S32_NODE(n));				\
 	static struct uart_nxp_s32_data uart_nxp_s32_data_##n;			\
 	static const struct uart_nxp_s32_config uart_nxp_s32_config_##n = {	\
 		.instance = n,							\
 		.base = (LINFLEXD_Type *)DT_REG_ADDR(UART_NXP_S32_NODE(n)),	\
 		.pincfg = PINCTRL_DT_DEV_CONFIG_GET(UART_NXP_S32_NODE(n)),	\
 	};									\
 	static int uart_nxp_s32_init_##n(const struct device *dev)		\
 	{									\
 		UART_NXP_S32_INTERRUPT_DEFINE(n, Linflexd_Uart_Ip_IRQHandler, n);\
 										\
 		return uart_nxp_s32_init(dev);					\
 	}									\
 	DEVICE_DT_DEFINE(UART_NXP_S32_NODE(n),					\
 			&uart_nxp_s32_init_##n,					\
 			NULL,							\
 			&uart_nxp_s32_data_##n,					\
 			&uart_nxp_s32_config_##n,				\
 			PRE_KERNEL_1,						\
 			CONFIG_KERNEL_INIT_PRIORITY_DEVICE,			\
 			&uart_nxp_s32_driver_api);

 #if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(0), okay)
 UART_NXP_S32_INIT_DEVICE(0)
 #endif

 #if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(1), okay)
 UART_NXP_S32_INIT_DEVICE(1)
 #endif

 #if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(2), okay)
 UART_NXP_S32_INIT_DEVICE(2)
 #endif

 #if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(3), okay)
 UART_NXP_S32_INIT_DEVICE(3)
 #endif

 #if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(4), okay)
 UART_NXP_S32_INIT_DEVICE(4)
 #endif

 #if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(5), okay)
 UART_NXP_S32_INIT_DEVICE(5)
 #endif

 #if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(6), okay)
 UART_NXP_S32_INIT_DEVICE(6)
 #endif

 #if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(7), okay)
 UART_NXP_S32_INIT_DEVICE(7)
 #endif

 #if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(8), okay)
 UART_NXP_S32_INIT_DEVICE(8)
 #endif

 #if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(9), okay)
 UART_NXP_S32_INIT_DEVICE(9)
 #endif

 #if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(10), okay)
 UART_NXP_S32_INIT_DEVICE(10)
 #endif

 #if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(11), okay)
 UART_NXP_S32_INIT_DEVICE(11)
 #endif

 #if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(12), okay)
 UART_NXP_S32_INIT_DEVICE(12)
 #endif

 #ifdef CONFIG_UART_INTERRUPT_DRIVEN
 static void s32_uart_device_event(const struct device *dev, Linflexd_Uart_Ip_EventType event,
 				  void *user_data)
 {
 	const struct uart_nxp_s32_config *config = dev->config;
 	struct uart_nxp_s32_data *data = dev->data;
 	struct uart_nxp_s32_int *int_data = &(data->int_data);
 	Linflexd_Uart_Ip_StatusType status;

 	ARG_UNUSED(user_data);

 	if (event == LINFLEXD_UART_IP_EVENT_END_TRANSFER) {
 		/*
 		 * Check the previous UART transmit has	finished
 		 * because Rx may also trigger this event
 		 */
 		status = Linflexd_Uart_Ip_GetTransmitStatus(config->instance, NULL);
 		if (status != LINFLEXD_UART_IP_STATUS_BUSY) {
 			int_data->tx_fifo_busy = false;
 			uart_nxp_s32_isr(dev);
 		}
 	} else if (event == LINFLEXD_UART_IP_EVENT_RX_FULL) {
 		int_data->rx_fifo_busy = false;
 		uart_nxp_s32_isr(dev);
 	} else if (event == LINFLEXD_UART_IP_EVENT_ERROR) {
 		uart_nxp_s32_isr(dev);
 	} else {
 		/* Other events are not used */
 	}
 }

 void s32_uart_callback(const uint8 instance, Linflexd_Uart_Ip_EventType event, void *user_data)
 {
 	const struct device *dev;

 	switch (instance) {
 #if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(0), okay)
 	case 0:
 		dev = DEVICE_DT_GET(UART_NXP_S32_NODE(0));
 		break;
 #endif
 #if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(1), okay)
 	case 1:
 		dev = DEVICE_DT_GET(UART_NXP_S32_NODE(1));
 		break;
 #endif
 #if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(2), okay)
 	case 2:
 		dev = DEVICE_DT_GET(UART_NXP_S32_NODE(2));
 		break;
 #endif
 #if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(3), okay)
 	case 3:
 		dev = DEVICE_DT_GET(UART_NXP_S32_NODE(3));
 		break;
 #endif
 #if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(4), okay)
 	case 4:
 		dev = DEVICE_DT_GET(UART_NXP_S32_NODE(4));
 		break;
 #endif
 #if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(5), okay)
 	case 5:
 		dev = DEVICE_DT_GET(UART_NXP_S32_NODE(5));
 		break;
 #endif
 #if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(6), okay)
 	case 6:
 		dev = DEVICE_DT_GET(UART_NXP_S32_NODE(6));
 		break;
 #endif
 #if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(7), okay)
 	case 7:
 		dev = DEVICE_DT_GET(UART_NXP_S32_NODE(7));
 		break;
 #endif
 #if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(8), okay)
 	case 8:
 		dev = DEVICE_DT_GET(UART_NXP_S32_NODE(8));
 		break;
 #endif
 #if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(9), okay)
 	case 9:
 		dev = DEVICE_DT_GET(UART_NXP_S32_NODE(9));
 		break;
 #endif
 #if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(10), okay)
 	case 10:
 		dev = DEVICE_DT_GET(UART_NXP_S32_NODE(10));
 		break;
 #endif
 #if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(11), okay)
 	case 11:
 		dev = DEVICE_DT_GET(UART_NXP_S32_NODE(11));
 		break;
 #endif
 #if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(12), okay)
 	case 12:
 		dev = DEVICE_DT_GET(UART_NXP_S32_NODE(12));
 		break;
 #endif
 	default:
 		dev = NULL;
 		break;
 	}

 	if (dev != NULL) {
 		s32_uart_device_event(dev, event, user_data);
 	}
 }
 #endif /* CONFIG_UART_INTERRUPT_DRIVEN */
	/*
	* Copyright 2022 NXP
	*
	* SPDX-License-Identifier: Apache-2.0
	*/

	#include <zephyr/irq.h>
	#include <zephyr/drivers/uart.h>
	#include <zephyr/drivers/pinctrl.h>

	#include <Linflexd_Uart_Ip.h>
	#include <Linflexd_Uart_Ip_Irq.h>
	#include "uart_nxp_s32_linflexd.h"

	static int uart_nxp_s32_err_check(const struct device *dev)
	{
	const struct uart_nxp_s32_config *config = dev->config;
	Linflexd_Uart_Ip_StatusType status;
	int err = 0;

	status = Linflexd_Uart_Ip_GetReceiveStatus(config->instance, NULL);

	if (status == LINFLEXD_UART_IP_STATUS_RX_OVERRUN) {
	err \|= UART_ERROR_OVERRUN;
	}

	if (status == LINFLEXD_UART_IP_STATUS_PARITY_ERROR) {
	err \|= UART_ERROR_PARITY;
	}

	if (status == LINFLEXD_UART_IP_STATUS_FRAMING_ERROR) {
	err \|= UART_ERROR_FRAMING;
	}

	return err;
	}

	static void uart_nxp_s32_poll_out(const struct device *dev, unsigned char c)
	{
	const struct uart_nxp_s32_config *config = dev->config;
	uint32_t linflexd_ier;
	uint8_t key;

	key = irq_lock();

	/* Save enabled Linflexd's interrupts */
	linflexd_ier = sys_read32(POINTER_TO_UINT(&config->base->LINIER));

	Linflexd_Uart_Ip_SyncSend(config->instance, &c, 1,
	CONFIG_UART_NXP_S32_POLL_OUT_TIMEOUT);

	/* Restore Linflexd's interrupts */
	sys_write32(linflexd_ier, POINTER_TO_UINT(&config->base->LINIER));

	irq_unlock(key);
	}

	static int uart_nxp_s32_poll_in(const struct device dev, unsigned char c)
	{
	const struct uart_nxp_s32_config *config = dev->config;
	Linflexd_Uart_Ip_StatusType status;
	uint32_t linflexd_ier;
	int ret;

	status = LINFLEXD_UART_IP_STATUS_SUCCESS;

	/* Save enabled Linflexd's interrupts */
	linflexd_ier = sys_read32(POINTER_TO_UINT(&config->base->LINIER));

	/* Retrieves data with poll method */
	status = Linflexd_Uart_Ip_SyncReceive(config->instance, c, 1,
	CONFIG_UART_NXP_S32_POLL_IN_TIMEOUT);

	/* Restore Linflexd's interrupts */
	sys_write32(linflexd_ier, POINTER_TO_UINT(&config->base->LINIER));

	if (status == LINFLEXD_UART_IP_STATUS_SUCCESS) {
	ret = 0;
	} else if (status == LINFLEXD_UART_IP_STATUS_TIMEOUT) {
	ret = -1;
	} else {
	ret = -EBUSY;
	}

	return ret;
	}

	#ifdef CONFIG_UART_INTERRUPT_DRIVEN

	static int uart_nxp_s32_fifo_fill(const struct device dev, const uint8_t tx_data,
	int size)
	{
	const struct uart_nxp_s32_config *config = dev->config;
	struct uart_nxp_s32_data *data = dev->data;
	struct uart_nxp_s32_int *int_data = &(data->int_data);

	if (int_data->tx_fifo_busy) {
	return 0;
	}

	int_data->tx_fifo_busy = true;

	Linflexd_Uart_Ip_AsyncSend(config->instance, tx_data, 1);

	return 1;
	}

	static int uart_nxp_s32_fifo_read(const struct device dev, uint8_t rx_data,
	const int size)
	{
	const struct uart_nxp_s32_config *config = dev->config;
	struct uart_nxp_s32_data *data = dev->data;
	struct uart_nxp_s32_int *int_data = &(data->int_data);

	if (int_data->rx_fifo_busy) {
	return 0;
	}

	*rx_data = int_data->rx_fifo_data;
	int_data->rx_fifo_busy = true;

	Linflexd_Uart_Ip_SetRxBuffer(config->instance, &(int_data->rx_fifo_data), 1);

	return 1;
	}

	static void uart_nxp_s32_irq_tx_enable(const struct device *dev)
	{

	struct uart_nxp_s32_data *data = dev->data;
	struct uart_nxp_s32_int *int_data = &(data->int_data);
	uint8_t key;

	int_data->irq_tx_enable = true;

	key = irq_lock();

	/* Callback is called in order to transmit the data */
	if (!int_data->tx_fifo_busy) {

	if (data->callback) {
	data->callback(dev, data->cb_data);
	}
	}

	irq_unlock(key);
	}

	static void uart_nxp_s32_irq_tx_disable(const struct device *dev)
	{
	const struct uart_nxp_s32_config *config = dev->config;
	struct uart_nxp_s32_data *data = dev->data;
	struct uart_nxp_s32_int *int_data = &(data->int_data);

	int_data->irq_tx_enable = false;
	int_data->tx_fifo_busy = false;

	Linflexd_Uart_Ip_AbortSendingData(config->instance);
	}

	static int uart_nxp_s32_irq_tx_ready(const struct device *dev)
	{
	struct uart_nxp_s32_data *data = dev->data;
	struct uart_nxp_s32_int *int_data = &(data->int_data);

	return !int_data->tx_fifo_busy && int_data->irq_tx_enable;
	}

	static void uart_nxp_s32_irq_rx_enable(const struct device *dev)
	{
	const struct uart_nxp_s32_config *config = dev->config;
	struct uart_nxp_s32_data *data = dev->data;
	struct uart_nxp_s32_int *int_data = &(data->int_data);

	int_data->irq_rx_enable = true;

	Linflexd_Uart_Ip_AsyncReceive(config->instance, &(int_data->rx_fifo_data), 1);
	}

	static void uart_nxp_s32_irq_rx_disable(const struct device *dev)
	{
	const struct uart_nxp_s32_config *config = dev->config;
	struct uart_nxp_s32_data *data = dev->data;
	struct uart_nxp_s32_int *int_data = &(data->int_data);

	int_data->irq_rx_enable = false;
	int_data->rx_fifo_busy = false;

	Linflexd_Uart_Ip_AbortReceivingData(config->instance);
	}

	static int uart_nxp_s32_irq_rx_ready(const struct device *dev)
	{
	struct uart_nxp_s32_data *data = dev->data;
	struct uart_nxp_s32_int *int_data = &(data->int_data);

	return !int_data->rx_fifo_busy && int_data->irq_rx_enable;
	}

	static void uart_nxp_s32_irq_err_enable(const struct device *dev)
	{
	const struct uart_nxp_s32_config *config = dev->config;
	uint32_t linflexd_ier;

	linflexd_ier = sys_read32(POINTER_TO_UINT(&config->base->LINIER));

	/* Enable frame error interrupt and buffer overrun error interrupt */
	linflexd_ier \|= (LINFLEXD_LINIER_FEIE_MASK \| LINFLEXD_LINIER_BOIE_MASK);

	sys_write32(linflexd_ier, POINTER_TO_UINT(&config->base->LINIER));
	}

	static void uart_nxp_s32_irq_err_disable(const struct device *dev)
	{
	const struct uart_nxp_s32_config *config = dev->config;
	uint32_t linflexd_ier;

	linflexd_ier = sys_read32(POINTER_TO_UINT(&config->base->LINIER));

	/* Disable frame error interrupt and buffer overrun error interrupt */
	linflexd_ier &= ~(LINFLEXD_LINIER_FEIE_MASK \| LINFLEXD_LINIER_BOIE_MASK);

	sys_write32(linflexd_ier, POINTER_TO_UINT(&config->base->LINIER));
	}

	static int uart_nxp_s32_irq_is_pending(const struct device *dev)
	{
	return (uart_nxp_s32_irq_tx_ready(dev)) \|\| (uart_nxp_s32_irq_rx_ready(dev));
	}

	static int uart_nxp_s32_irq_update(const struct device *dev)
	{
	return 1;
	}

	static void uart_nxp_s32_irq_callback_set(const struct device *dev,
	uart_irq_callback_user_data_t cb,
	void *cb_data)
	{
	struct uart_nxp_s32_data *data = dev->data;

	data->callback = cb;
	data->cb_data = cb_data;
	}

	/**
	* @brief Interrupt service routine.
	*
	* This simply calls the callback function, if one exists.
	*
	* Note: s32 UART Tx interrupts when ready to send; Rx interrupts when char
	* received.
	*
	* @param arg Argument to ISR.
	*
	* @return N/A
	*/

	void uart_nxp_s32_isr(const struct device *dev)
	{
	struct uart_nxp_s32_data *data = dev->data;

	if (data->callback) {
	data->callback(dev, data->cb_data);
	}
	}
	#endif /* CONFIG_UART_INTERRUPT_DRIVEN */

	/**
	* @brief Initialize UART channel
	*
	* This routine is called to reset the chip in a quiescent state.
	* It is assumed that this function is called only once per UART.
	*
	* @param dev UART device struct
	*
	* @return 0
	*/
	static int uart_nxp_s32_init(const struct device *dev)
	{
	const struct uart_nxp_s32_config *config = dev->config;
	struct uart_nxp_s32_data *data = dev->data;
	static uint8_t state_idx;
	uint8_t key;
	int err;

	err = pinctrl_apply_state(config->pincfg, PINCTRL_STATE_DEFAULT);
	if (err < 0) {
	return err;
	}

	key = irq_lock();

	/* Initialize UART with default configuration */
	data->hw_cfg.BaudRate = 115200;
	data->hw_cfg.BaudRateMantissa = 26U;
	data->hw_cfg.BaudRateFractionalDivisor = 1U;
	data->hw_cfg.ParityCheck = false;
	data->hw_cfg.ParityType = LINFLEXD_UART_IP_PARITY_EVEN;
	data->hw_cfg.StopBitsCount = LINFLEXD_UART_IP_ONE_STOP_BIT;
	data->hw_cfg.WordLength = LINFLEXD_UART_IP_8_BITS;
	data->hw_cfg.TransferType = LINFLEXD_UART_IP_USING_INTERRUPTS;
	data->hw_cfg.Callback = s32_uart_callback;
	data->hw_cfg.CallbackParam = NULL;
	data->hw_cfg.StateStruct = &Linflexd_Uart_Ip_apStateStructure[state_idx++];

	Linflexd_Uart_Ip_Init(config->instance, &data->hw_cfg);

	irq_unlock(key);

	return 0;
	}

	static const struct uart_driver_api uart_nxp_s32_driver_api = {
	.poll_in = uart_nxp_s32_poll_in,
	.poll_out = uart_nxp_s32_poll_out,
	.err_check = uart_nxp_s32_err_check,

	#ifdef CONFIG_UART_INTERRUPT_DRIVEN
	.fifo_fill = uart_nxp_s32_fifo_fill,
	.fifo_read = uart_nxp_s32_fifo_read,
	.irq_tx_enable = uart_nxp_s32_irq_tx_enable,
	.irq_tx_disable = uart_nxp_s32_irq_tx_disable,
	.irq_tx_ready = uart_nxp_s32_irq_tx_ready,
	.irq_rx_enable = uart_nxp_s32_irq_rx_enable,
	.irq_rx_disable = uart_nxp_s32_irq_rx_disable,
	.irq_rx_ready = uart_nxp_s32_irq_rx_ready,
	.irq_err_enable = uart_nxp_s32_irq_err_enable,
	.irq_err_disable = uart_nxp_s32_irq_err_disable,
	.irq_is_pending = uart_nxp_s32_irq_is_pending,
	.irq_update = uart_nxp_s32_irq_update,
	.irq_callback_set = uart_nxp_s32_irq_callback_set,
	#endif /* CONFIG_UART_INTERRUPT_DRIVEN */

	};

	#define UART_NXP_S32_NODE(n) DT_NODELABEL(uart##n)

	#if defined(CONFIG_UART_INTERRUPT_DRIVEN)
	#define UART_NXP_S32_INTERRUPT_DEFINE(n, isr_handler, parameter) \
	do { \
	IRQ_CONNECT(DT_IRQN(UART_NXP_S32_NODE(n)), \
	DT_IRQ(UART_NXP_S32_NODE(n), priority), \
	isr_handler, \
	parameter, \
	DT_IRQ(UART_NXP_S32_NODE(n), flags)); \
	\
	irq_enable(DT_IRQN(UART_NXP_S32_NODE(n))); \
	} while (0)

	#else
	#define UART_NXP_S32_INTERRUPT_DEFINE(n, isr_handler, parameter)
	#endif

	#define UART_NXP_S32_INIT_DEVICE(n) \
	PINCTRL_DT_DEFINE(UART_NXP_S32_NODE(n)); \
	static struct uart_nxp_s32_data uart_nxp_s32_data_##n; \
	static const struct uart_nxp_s32_config uart_nxp_s32_config_##n = { \
	.instance = n, \
	.base = (LINFLEXD_Type *)DT_REG_ADDR(UART_NXP_S32_NODE(n)), \
	.pincfg = PINCTRL_DT_DEV_CONFIG_GET(UART_NXP_S32_NODE(n)), \
	}; \
	static int uart_nxp_s32_init_##n(const struct device *dev) \
	{ \
	UART_NXP_S32_INTERRUPT_DEFINE(n, Linflexd_Uart_Ip_IRQHandler, n);\
	\
	return uart_nxp_s32_init(dev); \
	} \
	DEVICE_DT_DEFINE(UART_NXP_S32_NODE(n), \
	&uart_nxp_s32_init_##n, \
	NULL, \
	&uart_nxp_s32_data_##n, \
	&uart_nxp_s32_config_##n, \
	PRE_KERNEL_1, \
	CONFIG_KERNEL_INIT_PRIORITY_DEVICE, \
	&uart_nxp_s32_driver_api);

	#if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(0), okay)
	UART_NXP_S32_INIT_DEVICE(0)
	#endif

	#if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(1), okay)
	UART_NXP_S32_INIT_DEVICE(1)
	#endif

	#if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(2), okay)
	UART_NXP_S32_INIT_DEVICE(2)
	#endif

	#if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(3), okay)
	UART_NXP_S32_INIT_DEVICE(3)
	#endif

	#if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(4), okay)
	UART_NXP_S32_INIT_DEVICE(4)
	#endif

	#if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(5), okay)
	UART_NXP_S32_INIT_DEVICE(5)
	#endif

	#if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(6), okay)
	UART_NXP_S32_INIT_DEVICE(6)
	#endif

	#if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(7), okay)
	UART_NXP_S32_INIT_DEVICE(7)
	#endif

	#if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(8), okay)
	UART_NXP_S32_INIT_DEVICE(8)
	#endif

	#if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(9), okay)
	UART_NXP_S32_INIT_DEVICE(9)
	#endif

	#if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(10), okay)
	UART_NXP_S32_INIT_DEVICE(10)
	#endif

	#if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(11), okay)
	UART_NXP_S32_INIT_DEVICE(11)
	#endif

	#if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(12), okay)
	UART_NXP_S32_INIT_DEVICE(12)
	#endif

	#ifdef CONFIG_UART_INTERRUPT_DRIVEN
	static void s32_uart_device_event(const struct device *dev, Linflexd_Uart_Ip_EventType event,
	void *user_data)
	{
	const struct uart_nxp_s32_config *config = dev->config;
	struct uart_nxp_s32_data *data = dev->data;
	struct uart_nxp_s32_int *int_data = &(data->int_data);
	Linflexd_Uart_Ip_StatusType status;

	ARG_UNUSED(user_data);

	if (event == LINFLEXD_UART_IP_EVENT_END_TRANSFER) {
	/*
	* Check the previous UART transmit has finished
	* because Rx may also trigger this event
	*/
	status = Linflexd_Uart_Ip_GetTransmitStatus(config->instance, NULL);
	if (status != LINFLEXD_UART_IP_STATUS_BUSY) {
	int_data->tx_fifo_busy = false;
	uart_nxp_s32_isr(dev);
	}
	} else if (event == LINFLEXD_UART_IP_EVENT_RX_FULL) {
	int_data->rx_fifo_busy = false;
	uart_nxp_s32_isr(dev);
	} else if (event == LINFLEXD_UART_IP_EVENT_ERROR) {
	uart_nxp_s32_isr(dev);
	} else {
	/* Other events are not used */
	}
	}

	void s32_uart_callback(const uint8 instance, Linflexd_Uart_Ip_EventType event, void *user_data)
	{
	const struct device *dev;

	switch (instance) {
	#if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(0), okay)
	case 0:
	dev = DEVICE_DT_GET(UART_NXP_S32_NODE(0));
	break;
	#endif
	#if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(1), okay)
	case 1:
	dev = DEVICE_DT_GET(UART_NXP_S32_NODE(1));
	break;
	#endif
	#if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(2), okay)
	case 2:
	dev = DEVICE_DT_GET(UART_NXP_S32_NODE(2));
	break;
	#endif
	#if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(3), okay)
	case 3:
	dev = DEVICE_DT_GET(UART_NXP_S32_NODE(3));
	break;
	#endif
	#if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(4), okay)
	case 4:
	dev = DEVICE_DT_GET(UART_NXP_S32_NODE(4));
	break;
	#endif
	#if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(5), okay)
	case 5:
	dev = DEVICE_DT_GET(UART_NXP_S32_NODE(5));
	break;
	#endif
	#if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(6), okay)
	case 6:
	dev = DEVICE_DT_GET(UART_NXP_S32_NODE(6));
	break;
	#endif
	#if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(7), okay)
	case 7:
	dev = DEVICE_DT_GET(UART_NXP_S32_NODE(7));
	break;
	#endif
	#if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(8), okay)
	case 8:
	dev = DEVICE_DT_GET(UART_NXP_S32_NODE(8));
	break;
	#endif
	#if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(9), okay)
	case 9:
	dev = DEVICE_DT_GET(UART_NXP_S32_NODE(9));
	break;
	#endif
	#if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(10), okay)
	case 10:
	dev = DEVICE_DT_GET(UART_NXP_S32_NODE(10));
	break;
	#endif
	#if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(11), okay)
	case 11:
	dev = DEVICE_DT_GET(UART_NXP_S32_NODE(11));
	break;
	#endif
	#if DT_NODE_HAS_STATUS(UART_NXP_S32_NODE(12), okay)
	case 12:
	dev = DEVICE_DT_GET(UART_NXP_S32_NODE(12));
	break;
	#endif
	default:
	dev = NULL;
	break;
	}

	if (dev != NULL) {
	s32_uart_device_event(dev, event, user_data);
	}
	}
	#endif /* CONFIG_UART_INTERRUPT_DRIVEN */