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

 /*
  * SPDX-License-Identifier: Apache-2.0
  *
  *  Copyright (c) 2023 Nuvoton Technology Corporation.
  */

 #define DT_DRV_COMPAT nuvoton_numaker_uart

 #include <string.h>
 #include <zephyr/drivers/uart.h>
 #include <zephyr/drivers/reset.h>
 #include <zephyr/irq.h>
 #include <zephyr/logging/log.h>
 #include <zephyr/drivers/clock_control.h>
 #include <zephyr/drivers/clock_control/clock_control_numaker.h>
 #include <zephyr/drivers/pinctrl.h>
 #include <NuMicro.h>

 LOG_MODULE_REGISTER(numaker_uart, LOG_LEVEL_ERR);

 struct uart_numaker_config {
 	UART_T *uart;
 	const struct reset_dt_spec reset;
 	uint32_t clk_modidx;
 	uint32_t clk_src;
 	uint32_t clk_div;
 	const struct device *clk_dev;
 	uint32_t irq_n;
 #ifdef CONFIG_UART_INTERRUPT_DRIVEN
 	void (*irq_config_func)(const struct device *dev);
 #endif
 	const struct pinctrl_dev_config *pincfg;
 };

 struct uart_numaker_data {
 	const struct device *clock;
 	struct uart_config ucfg;
 #ifdef CONFIG_UART_INTERRUPT_DRIVEN
 	uart_irq_callback_user_data_t user_cb;
 	void *user_data;
 #endif
 };

 static int uart_numaker_poll_in(const struct device *dev, unsigned char *c)
 {
 	const struct uart_numaker_config *config = dev->config;
 	uint32_t count;

 	count = UART_Read(config->uart, c, 1);
 	if (!count) {
 		return -1;
 	}

 	return 0;
 }

 static void uart_numaker_poll_out(const struct device *dev, unsigned char c)
 {
 	const struct uart_numaker_config *config = dev->config;

 	UART_Write(config->uart, &c, 1);
 }

 static int uart_numaker_err_check(const struct device *dev)
 {
 	const struct uart_numaker_config *config = dev->config;
 	UART_T *uart = config->uart;
 	uint32_t flags = uart->FIFOSTS;
 	int err = 0;

 	if (flags & UART_FIFOSTS_RXOVIF_Msk) {
 		err |= UART_ERROR_OVERRUN;
 	}

 	if (flags & UART_FIFOSTS_PEF_Msk) {
 		err |= UART_ERROR_PARITY;
 	}

 	if (flags & UART_FIFOSTS_FEF_Msk) {
 		err |= UART_ERROR_FRAMING;
 	}

 	if (flags & UART_FIFOSTS_BIF_Msk) {
 		err |= UART_BREAK;
 	}

 	if (flags & (UART_FIFOSTS_BIF_Msk | UART_FIFOSTS_FEF_Msk | UART_FIFOSTS_PEF_Msk |
 		     UART_FIFOSTS_RXOVIF_Msk)) {
 		uart->FIFOSTS = (UART_FIFOSTS_BIF_Msk | UART_FIFOSTS_FEF_Msk |
 				 UART_FIFOSTS_PEF_Msk | UART_FIFOSTS_RXOVIF_Msk);
 	}
 	return err;
 }

 static inline int32_t uart_numaker_convert_stopbit(enum uart_config_stop_bits sb)
 {
 	switch (sb) {
 	case UART_CFG_STOP_BITS_1:
 		return UART_STOP_BIT_1;
 	case UART_CFG_STOP_BITS_1_5:
 		return UART_STOP_BIT_1_5;
 	case UART_CFG_STOP_BITS_2:
 		return UART_STOP_BIT_2;
 	default:
 		return -ENOTSUP;
 	}
 };

 static inline int32_t uart_numaker_convert_datalen(enum uart_config_data_bits db)
 {
 	switch (db) {
 	case UART_CFG_DATA_BITS_5:
 		return UART_WORD_LEN_5;
 	case UART_CFG_DATA_BITS_6:
 		return UART_WORD_LEN_6;
 	case UART_CFG_DATA_BITS_7:
 		return UART_WORD_LEN_7;
 	case UART_CFG_DATA_BITS_8:
 		return UART_WORD_LEN_8;
 	default:
 		return -ENOTSUP;
 	}
 }

 static inline uint32_t uart_numaker_convert_parity(enum uart_config_parity parity)
 {
 	switch (parity) {
 	case UART_CFG_PARITY_ODD:
 		return UART_PARITY_ODD;
 	case UART_CFG_PARITY_EVEN:
 		return UART_PARITY_EVEN;
 	case UART_CFG_PARITY_MARK:
 		return UART_PARITY_MARK;
 	case UART_CFG_PARITY_SPACE:
 		return UART_PARITY_SPACE;
 	case UART_CFG_PARITY_NONE:
 	default:
 		return UART_PARITY_NONE;
 	}
 }

 #ifdef CONFIG_UART_USE_RUNTIME_CONFIGURE
 static int uart_numaker_configure(const struct device *dev, const struct uart_config *cfg)
 {
 	const struct uart_numaker_config *config = dev->config;
 	struct uart_numaker_data *pData = dev->data;
 	int32_t databits, stopbits;
 	uint32_t parity;

 	databits = uart_numaker_convert_datalen(cfg->data_bits);
 	if (databits < 0) {
 		return databits;
 	}

 	stopbits = uart_numaker_convert_stopbit(cfg->stop_bits);
 	if (stopbits < 0) {
 		return stopbits;
 	}

 	if (cfg->flow_ctrl == UART_CFG_FLOW_CTRL_NONE) {
 		UART_DisableFlowCtrl(config->uart);
 	} else if (cfg->flow_ctrl == UART_CFG_FLOW_CTRL_RTS_CTS) {
 		UART_EnableFlowCtrl(config->uart);
 	} else {
 		return -ENOTSUP;
 	}

 	parity = uart_numaker_convert_parity(cfg->parity);

 	UART_SetLineConfig(config->uart, cfg->baudrate, databits, parity, stopbits);

 	memcpy(&pData->ucfg, cfg, sizeof(*cfg));

 	return 0;
 }

 static int uart_numaker_config_get(const struct device *dev, struct uart_config *cfg)
 {
 	struct uart_numaker_data *pData = dev->data;

 	memcpy(cfg, &pData->ucfg, sizeof(*cfg));

 	return 0;
 }
 #endif /* CONFIG_UART_USE_RUNTIME_CONFIGURE */

 static int uart_numaker_init(const struct device *dev)
 {
 	const struct uart_numaker_config *config = dev->config;
 	struct uart_numaker_data *pData = dev->data;
 	int err = 0;

 	SYS_UnlockReg();

 	struct numaker_scc_subsys scc_subsys;

 	memset(&scc_subsys, 0x00, sizeof(scc_subsys));
 	scc_subsys.subsys_id = NUMAKER_SCC_SUBSYS_ID_PCC;
 	scc_subsys.pcc.clk_modidx = config->clk_modidx;
 	scc_subsys.pcc.clk_src = config->clk_src;
 	scc_subsys.pcc.clk_div = config->clk_div;

 	/* Equivalent to CLK_EnableModuleClock(clk_modidx) */
 	err = clock_control_on(config->clk_dev, (clock_control_subsys_t)&scc_subsys);
 	if (err != 0) {
 		goto move_exit;
 	}
 	/* Equivalent to CLK_SetModuleClock(clk_modidx, clk_src, clk_div) */
 	err = clock_control_configure(config->clk_dev, (clock_control_subsys_t)&scc_subsys, NULL);
 	if (err != 0) {
 		goto move_exit;
 	}

 	/*
 	 * Set pinctrl for UART0 RXD and TXD
 	 * Set multi-function pins for UART0 RXD and TXD
 	 */
 	err = pinctrl_apply_state(config->pincfg, PINCTRL_STATE_DEFAULT);
 	if (err != 0) {
 		goto move_exit;
 	}

 	/* Same as BSP's SYS_ResetModule(id_rst) */
 	if (!device_is_ready(config->reset.dev)) {
 		LOG_ERR("reset controller not ready");
 		return -ENODEV;
 	}

 	/* Reset UART to default state */
 	reset_line_toggle_dt(&config->reset);

 	UART_Open(config->uart, pData->ucfg.baudrate);

 #ifdef CONFIG_UART_INTERRUPT_DRIVEN
 	config->irq_config_func(dev);
 #endif

 move_exit:
 	SYS_LockReg();
 	return err;
 }

 #ifdef CONFIG_UART_INTERRUPT_DRIVEN
 static int uart_numaker_fifo_fill(const struct device *dev, const uint8_t *tx_data, int size)
 {
 	const struct uart_numaker_config *config = dev->config;
 	UART_T *uart = config->uart;
 	int tx_bytes = 0;

 	/* Check TX FIFO not full, then fill */
 	while (((size - tx_bytes) > 0) && (!(uart->FIFOSTS & UART_FIFOSTS_TXFULL_Msk))) {
 		/* Fill one byte into TX FIFO */
 		uart->DAT = tx_data[tx_bytes++];
 	}

 	return tx_bytes;
 }

 static int uart_numaker_fifo_read(const struct device *dev, uint8_t *rx_data, const int size)
 {
 	const struct uart_numaker_config *config = dev->config;
 	UART_T *uart = config->uart;
 	int rx_bytes = 0;

 	/* Check RX FIFO not empty, then read */
 	while (((size - rx_bytes) > 0) && (!(uart->FIFOSTS & UART_FIFOSTS_RXEMPTY_Msk))) {
 		/* Read one byte from UART RX FIFO */
 		rx_data[rx_bytes++] = (uint8_t)uart->DAT;
 	}

 	return rx_bytes;
 }

 static void uart_numaker_irq_tx_enable(const struct device *dev)
 {
 	const struct uart_numaker_config *config = dev->config;
 	UART_T *uart = config->uart;

 	UART_EnableInt(uart, UART_INTEN_THREIEN_Msk);
 }

 static void uart_numaker_irq_tx_disable(const struct device *dev)
 {
 	const struct uart_numaker_config *config = dev->config;
 	UART_T *uart = config->uart;

 	UART_DisableInt(uart, UART_INTEN_THREIEN_Msk);
 }

 static int uart_numaker_irq_tx_ready(const struct device *dev)
 {
 	const struct uart_numaker_config *config = dev->config;
 	UART_T *uart = config->uart;

 	return ((!UART_IS_TX_FULL(uart)) && (uart->INTEN & UART_INTEN_THREIEN_Msk));
 }

 static int uart_numaker_irq_tx_complete(const struct device *dev)
 {
 	const struct uart_numaker_config *config = dev->config;
 	UART_T *uart = config->uart;

 	return (uart->INTSTS & UART_INTSTS_THREINT_Msk);
 }

 static void uart_numaker_irq_rx_enable(const struct device *dev)
 {
 	const struct uart_numaker_config *config = dev->config;
 	UART_T *uart = config->uart;

 	UART_EnableInt(uart, UART_INTEN_RDAIEN_Msk);
 }

 static void uart_numaker_irq_rx_disable(const struct device *dev)
 {
 	const struct uart_numaker_config *config = dev->config;
 	UART_T *uart = config->uart;

 	UART_DisableInt(uart, UART_INTEN_RDAIEN_Msk);
 }

 static int uart_numaker_irq_rx_ready(const struct device *dev)
 {
 	const struct uart_numaker_config *config = dev->config;
 	UART_T *uart = config->uart;

 	return ((!UART_GET_RX_EMPTY(uart)) && (uart->INTEN & UART_INTEN_RDAIEN_Msk));
 }

 static void uart_numaker_irq_err_enable(const struct device *dev)
 {
 	const struct uart_numaker_config *config = dev->config;
 	UART_T *uart = config->uart;

 	UART_EnableInt(uart, UART_INTEN_BUFERRIEN_Msk | UART_INTEN_SWBEIEN_Msk);
 }

 static void uart_numaker_irq_err_disable(const struct device *dev)
 {
 	const struct uart_numaker_config *config = dev->config;
 	UART_T *uart = config->uart;

 	UART_DisableInt(uart, UART_INTEN_BUFERRIEN_Msk | UART_INTEN_SWBEIEN_Msk);
 }

 static int uart_numaker_irq_is_pending(const struct device *dev)
 {

 	return (uart_numaker_irq_tx_ready(dev) || (uart_numaker_irq_rx_ready(dev)));
 }

 static int uart_numaker_irq_update(const struct device *dev)
 {
 	ARG_UNUSED(dev);

 	/* nothing to be done */
 	return 1;
 }

 static void uart_numaker_irq_callback_set(const struct device *dev,
 					  uart_irq_callback_user_data_t cb, void *cb_data)
 {
 	struct uart_numaker_data *pData = dev->data;

 	pData->user_cb = cb;
 	pData->user_data = cb_data;
 }

 static void uart_numaker_isr(const struct device *dev)
 {
 	struct uart_numaker_data *pData = dev->data;

 	if (pData->user_cb) {
 		pData->user_cb(dev, pData->user_data);
 	}
 }

 #endif /* CONFIG_UART_INTERRUPT_DRIVEN */

 static const struct uart_driver_api uart_numaker_driver_api = {
 	.poll_in = uart_numaker_poll_in,
 	.poll_out = uart_numaker_poll_out,
 	.err_check = uart_numaker_err_check,
 #ifdef CONFIG_UART_USE_RUNTIME_CONFIGURE
 	.configure = uart_numaker_configure,
 	.config_get = uart_numaker_config_get,
 #endif
 #ifdef CONFIG_UART_INTERRUPT_DRIVEN
 	.fifo_fill = uart_numaker_fifo_fill,
 	.fifo_read = uart_numaker_fifo_read,
 	.irq_tx_enable = uart_numaker_irq_tx_enable,
 	.irq_tx_disable = uart_numaker_irq_tx_disable,
 	.irq_tx_ready = uart_numaker_irq_tx_ready,
 	.irq_tx_complete = uart_numaker_irq_tx_complete,
 	.irq_rx_enable = uart_numaker_irq_rx_enable,
 	.irq_rx_disable = uart_numaker_irq_rx_disable,
 	.irq_rx_ready = uart_numaker_irq_rx_ready,
 	.irq_err_enable = uart_numaker_irq_err_enable,
 	.irq_err_disable = uart_numaker_irq_err_disable,
 	.irq_is_pending = uart_numaker_irq_is_pending,
 	.irq_update = uart_numaker_irq_update,
 	.irq_callback_set = uart_numaker_irq_callback_set,
 #endif
 };

 #define CLOCK_CTRL_INIT(n) .clk_dev = DEVICE_DT_GET(DT_PARENT(DT_INST_CLOCKS_CTLR(n))),

 #define PINCTRL_DEFINE(n) PINCTRL_DT_INST_DEFINE(n);
 #define PINCTRL_INIT(n)	  .pincfg = PINCTRL_DT_INST_DEV_CONFIG_GET(n),

 #ifdef CONFIG_UART_INTERRUPT_DRIVEN
 #define NUMAKER_UART_IRQ_CONFIG_FUNC(n)                                                            \
 	static void uart_numaker_irq_config_##n(const struct device *dev)                          \
 	{                                                                                          \
 		IRQ_CONNECT(DT_INST_IRQN(n), DT_INST_IRQ(n, priority), uart_numaker_isr,           \
 			    DEVICE_DT_INST_GET(n), 0);                                             \
 		irq_enable(DT_INST_IRQN(n));                                                       \
 	}
 #define IRQ_FUNC_INIT(n) .irq_config_func = uart_numaker_irq_config_##n
 #else
 #define NUMAKER_UART_IRQ_CONFIG_FUNC(n)
 #define IRQ_FUNC_INIT(n)
 #endif

 #define NUMAKER_UART_INIT(inst)                                                                    \
 	PINCTRL_DEFINE(inst)                                                                       \
 	NUMAKER_UART_IRQ_CONFIG_FUNC(inst)                                                         \
                                                                                                    \
 	static const struct uart_numaker_config uart_numaker_cfg_##inst = {                        \
 		.uart = (UART_T *)DT_INST_REG_ADDR(inst),                                          \
 		.reset = RESET_DT_SPEC_INST_GET(inst),                                             \
 		.clk_modidx = DT_INST_CLOCKS_CELL(inst, clock_module_index),                       \
 		.clk_src = DT_INST_CLOCKS_CELL(inst, clock_source),                                \
 		.clk_div = DT_INST_CLOCKS_CELL(inst, clock_divider),                               \
 		CLOCK_CTRL_INIT(inst).irq_n = DT_INST_IRQN(inst),                                  \
 		PINCTRL_INIT(inst) IRQ_FUNC_INIT(inst)};                                           \
                                                                                                    \
 	static struct uart_numaker_data uart_numaker_data_##inst = {                               \
 		.ucfg =                                                                            \
 			{                                                                          \
 				.baudrate = DT_INST_PROP(inst, current_speed),                     \
 			},                                                                         \
 	};                                                                                         \
                                                                                                    \
 	DEVICE_DT_INST_DEFINE(inst, &uart_numaker_init, NULL, &uart_numaker_data_##inst,           \
 			      &uart_numaker_cfg_##inst, PRE_KERNEL_1, CONFIG_SERIAL_INIT_PRIORITY, \
 			      &uart_numaker_driver_api);

 DT_INST_FOREACH_STATUS_OKAY(NUMAKER_UART_INIT)
	/*
	* SPDX-License-Identifier: Apache-2.0
	*
	* Copyright (c) 2023 Nuvoton Technology Corporation.
	*/

	#define DT_DRV_COMPAT nuvoton_numaker_uart

	#include <string.h>
	#include <zephyr/drivers/uart.h>
	#include <zephyr/drivers/reset.h>
	#include <zephyr/irq.h>
	#include <zephyr/logging/log.h>
	#include <zephyr/drivers/clock_control.h>
	#include <zephyr/drivers/clock_control/clock_control_numaker.h>
	#include <zephyr/drivers/pinctrl.h>
	#include <NuMicro.h>

	LOG_MODULE_REGISTER(numaker_uart, LOG_LEVEL_ERR);

	struct uart_numaker_config {
	UART_T *uart;
	const struct reset_dt_spec reset;
	uint32_t clk_modidx;
	uint32_t clk_src;
	uint32_t clk_div;
	const struct device *clk_dev;
	uint32_t irq_n;
	#ifdef CONFIG_UART_INTERRUPT_DRIVEN
	void (irq_config_func)(const struct device dev);
	#endif
	const struct pinctrl_dev_config *pincfg;
	};

	struct uart_numaker_data {
	const struct device *clock;
	struct uart_config ucfg;
	#ifdef CONFIG_UART_INTERRUPT_DRIVEN
	uart_irq_callback_user_data_t user_cb;
	void *user_data;
	#endif
	};

	static int uart_numaker_poll_in(const struct device dev, unsigned char c)
	{
	const struct uart_numaker_config *config = dev->config;
	uint32_t count;

	count = UART_Read(config->uart, c, 1);
	if (!count) {
	return -1;
	}

	return 0;
	}

	static void uart_numaker_poll_out(const struct device *dev, unsigned char c)
	{
	const struct uart_numaker_config *config = dev->config;

	UART_Write(config->uart, &c, 1);
	}

	static int uart_numaker_err_check(const struct device *dev)
	{
	const struct uart_numaker_config *config = dev->config;
	UART_T *uart = config->uart;
	uint32_t flags = uart->FIFOSTS;
	int err = 0;

	if (flags & UART_FIFOSTS_RXOVIF_Msk) {
	err \|= UART_ERROR_OVERRUN;
	}

	if (flags & UART_FIFOSTS_PEF_Msk) {
	err \|= UART_ERROR_PARITY;
	}

	if (flags & UART_FIFOSTS_FEF_Msk) {
	err \|= UART_ERROR_FRAMING;
	}

	if (flags & UART_FIFOSTS_BIF_Msk) {
	err \|= UART_BREAK;
	}

	if (flags & (UART_FIFOSTS_BIF_Msk \| UART_FIFOSTS_FEF_Msk \| UART_FIFOSTS_PEF_Msk \|
	UART_FIFOSTS_RXOVIF_Msk)) {
	uart->FIFOSTS = (UART_FIFOSTS_BIF_Msk \| UART_FIFOSTS_FEF_Msk \|
	UART_FIFOSTS_PEF_Msk \| UART_FIFOSTS_RXOVIF_Msk);
	}
	return err;
	}

	static inline int32_t uart_numaker_convert_stopbit(enum uart_config_stop_bits sb)
	{
	switch (sb) {
	case UART_CFG_STOP_BITS_1:
	return UART_STOP_BIT_1;
	case UART_CFG_STOP_BITS_1_5:
	return UART_STOP_BIT_1_5;
	case UART_CFG_STOP_BITS_2:
	return UART_STOP_BIT_2;
	default:
	return -ENOTSUP;
	}
	};

	static inline int32_t uart_numaker_convert_datalen(enum uart_config_data_bits db)
	{
	switch (db) {
	case UART_CFG_DATA_BITS_5:
	return UART_WORD_LEN_5;
	case UART_CFG_DATA_BITS_6:
	return UART_WORD_LEN_6;
	case UART_CFG_DATA_BITS_7:
	return UART_WORD_LEN_7;
	case UART_CFG_DATA_BITS_8:
	return UART_WORD_LEN_8;
	default:
	return -ENOTSUP;
	}
	}

	static inline uint32_t uart_numaker_convert_parity(enum uart_config_parity parity)
	{
	switch (parity) {
	case UART_CFG_PARITY_ODD:
	return UART_PARITY_ODD;
	case UART_CFG_PARITY_EVEN:
	return UART_PARITY_EVEN;
	case UART_CFG_PARITY_MARK:
	return UART_PARITY_MARK;
	case UART_CFG_PARITY_SPACE:
	return UART_PARITY_SPACE;
	case UART_CFG_PARITY_NONE:
	default:
	return UART_PARITY_NONE;
	}
	}

	#ifdef CONFIG_UART_USE_RUNTIME_CONFIGURE
	static int uart_numaker_configure(const struct device dev, const struct uart_config cfg)
	{
	const struct uart_numaker_config *config = dev->config;
	struct uart_numaker_data *pData = dev->data;
	int32_t databits, stopbits;
	uint32_t parity;

	databits = uart_numaker_convert_datalen(cfg->data_bits);
	if (databits < 0) {
	return databits;
	}

	stopbits = uart_numaker_convert_stopbit(cfg->stop_bits);
	if (stopbits < 0) {
	return stopbits;
	}

	if (cfg->flow_ctrl == UART_CFG_FLOW_CTRL_NONE) {
	UART_DisableFlowCtrl(config->uart);
	} else if (cfg->flow_ctrl == UART_CFG_FLOW_CTRL_RTS_CTS) {
	UART_EnableFlowCtrl(config->uart);
	} else {
	return -ENOTSUP;
	}

	parity = uart_numaker_convert_parity(cfg->parity);

	UART_SetLineConfig(config->uart, cfg->baudrate, databits, parity, stopbits);

	memcpy(&pData->ucfg, cfg, sizeof(*cfg));

	return 0;
	}

	static int uart_numaker_config_get(const struct device dev, struct uart_config cfg)
	{
	struct uart_numaker_data *pData = dev->data;

	memcpy(cfg, &pData->ucfg, sizeof(*cfg));

	return 0;
	}
	#endif /* CONFIG_UART_USE_RUNTIME_CONFIGURE */

	static int uart_numaker_init(const struct device *dev)
	{
	const struct uart_numaker_config *config = dev->config;
	struct uart_numaker_data *pData = dev->data;
	int err = 0;

	SYS_UnlockReg();

	struct numaker_scc_subsys scc_subsys;

	memset(&scc_subsys, 0x00, sizeof(scc_subsys));
	scc_subsys.subsys_id = NUMAKER_SCC_SUBSYS_ID_PCC;
	scc_subsys.pcc.clk_modidx = config->clk_modidx;
	scc_subsys.pcc.clk_src = config->clk_src;
	scc_subsys.pcc.clk_div = config->clk_div;

	/* Equivalent to CLK_EnableModuleClock(clk_modidx) */
	err = clock_control_on(config->clk_dev, (clock_control_subsys_t)&scc_subsys);
	if (err != 0) {
	goto move_exit;
	}
	/* Equivalent to CLK_SetModuleClock(clk_modidx, clk_src, clk_div) */
	err = clock_control_configure(config->clk_dev, (clock_control_subsys_t)&scc_subsys, NULL);
	if (err != 0) {
	goto move_exit;
	}

	/*
	* Set pinctrl for UART0 RXD and TXD
	* Set multi-function pins for UART0 RXD and TXD
	*/
	err = pinctrl_apply_state(config->pincfg, PINCTRL_STATE_DEFAULT);
	if (err != 0) {
	goto move_exit;
	}

	/* Same as BSP's SYS_ResetModule(id_rst) */
	if (!device_is_ready(config->reset.dev)) {
	LOG_ERR("reset controller not ready");
	return -ENODEV;
	}

	/* Reset UART to default state */
	reset_line_toggle_dt(&config->reset);

	UART_Open(config->uart, pData->ucfg.baudrate);

	#ifdef CONFIG_UART_INTERRUPT_DRIVEN
	config->irq_config_func(dev);
	#endif

	move_exit:
	SYS_LockReg();
	return err;
	}

	#ifdef CONFIG_UART_INTERRUPT_DRIVEN
	static int uart_numaker_fifo_fill(const struct device dev, const uint8_t tx_data, int size)
	{
	const struct uart_numaker_config *config = dev->config;
	UART_T *uart = config->uart;
	int tx_bytes = 0;

	/* Check TX FIFO not full, then fill */
	while (((size - tx_bytes) > 0) && (!(uart->FIFOSTS & UART_FIFOSTS_TXFULL_Msk))) {
	/* Fill one byte into TX FIFO */
	uart->DAT = tx_data[tx_bytes++];
	}

	return tx_bytes;
	}

	static int uart_numaker_fifo_read(const struct device dev, uint8_t rx_data, const int size)
	{
	const struct uart_numaker_config *config = dev->config;
	UART_T *uart = config->uart;
	int rx_bytes = 0;

	/* Check RX FIFO not empty, then read */
	while (((size - rx_bytes) > 0) && (!(uart->FIFOSTS & UART_FIFOSTS_RXEMPTY_Msk))) {
	/* Read one byte from UART RX FIFO */
	rx_data[rx_bytes++] = (uint8_t)uart->DAT;
	}

	return rx_bytes;
	}

	static void uart_numaker_irq_tx_enable(const struct device *dev)
	{
	const struct uart_numaker_config *config = dev->config;
	UART_T *uart = config->uart;

	UART_EnableInt(uart, UART_INTEN_THREIEN_Msk);
	}

	static void uart_numaker_irq_tx_disable(const struct device *dev)
	{
	const struct uart_numaker_config *config = dev->config;
	UART_T *uart = config->uart;

	UART_DisableInt(uart, UART_INTEN_THREIEN_Msk);
	}

	static int uart_numaker_irq_tx_ready(const struct device *dev)
	{
	const struct uart_numaker_config *config = dev->config;
	UART_T *uart = config->uart;

	return ((!UART_IS_TX_FULL(uart)) && (uart->INTEN & UART_INTEN_THREIEN_Msk));
	}

	static int uart_numaker_irq_tx_complete(const struct device *dev)
	{
	const struct uart_numaker_config *config = dev->config;
	UART_T *uart = config->uart;

	return (uart->INTSTS & UART_INTSTS_THREINT_Msk);
	}

	static void uart_numaker_irq_rx_enable(const struct device *dev)
	{
	const struct uart_numaker_config *config = dev->config;
	UART_T *uart = config->uart;

	UART_EnableInt(uart, UART_INTEN_RDAIEN_Msk);
	}

	static void uart_numaker_irq_rx_disable(const struct device *dev)
	{
	const struct uart_numaker_config *config = dev->config;
	UART_T *uart = config->uart;

	UART_DisableInt(uart, UART_INTEN_RDAIEN_Msk);
	}

	static int uart_numaker_irq_rx_ready(const struct device *dev)
	{
	const struct uart_numaker_config *config = dev->config;
	UART_T *uart = config->uart;

	return ((!UART_GET_RX_EMPTY(uart)) && (uart->INTEN & UART_INTEN_RDAIEN_Msk));
	}

	static void uart_numaker_irq_err_enable(const struct device *dev)
	{
	const struct uart_numaker_config *config = dev->config;
	UART_T *uart = config->uart;

	UART_EnableInt(uart, UART_INTEN_BUFERRIEN_Msk \| UART_INTEN_SWBEIEN_Msk);
	}

	static void uart_numaker_irq_err_disable(const struct device *dev)
	{
	const struct uart_numaker_config *config = dev->config;
	UART_T *uart = config->uart;

	UART_DisableInt(uart, UART_INTEN_BUFERRIEN_Msk \| UART_INTEN_SWBEIEN_Msk);
	}

	static int uart_numaker_irq_is_pending(const struct device *dev)
	{

	return (uart_numaker_irq_tx_ready(dev) \|\| (uart_numaker_irq_rx_ready(dev)));
	}

	static int uart_numaker_irq_update(const struct device *dev)
	{
	ARG_UNUSED(dev);

	/* nothing to be done */
	return 1;
	}

	static void uart_numaker_irq_callback_set(const struct device *dev,
	uart_irq_callback_user_data_t cb, void *cb_data)
	{
	struct uart_numaker_data *pData = dev->data;

	pData->user_cb = cb;
	pData->user_data = cb_data;
	}

	static void uart_numaker_isr(const struct device *dev)
	{
	struct uart_numaker_data *pData = dev->data;

	if (pData->user_cb) {
	pData->user_cb(dev, pData->user_data);
	}
	}

	#endif /* CONFIG_UART_INTERRUPT_DRIVEN */

	static const struct uart_driver_api uart_numaker_driver_api = {
	.poll_in = uart_numaker_poll_in,
	.poll_out = uart_numaker_poll_out,
	.err_check = uart_numaker_err_check,
	#ifdef CONFIG_UART_USE_RUNTIME_CONFIGURE
	.configure = uart_numaker_configure,
	.config_get = uart_numaker_config_get,
	#endif
	#ifdef CONFIG_UART_INTERRUPT_DRIVEN
	.fifo_fill = uart_numaker_fifo_fill,
	.fifo_read = uart_numaker_fifo_read,
	.irq_tx_enable = uart_numaker_irq_tx_enable,
	.irq_tx_disable = uart_numaker_irq_tx_disable,
	.irq_tx_ready = uart_numaker_irq_tx_ready,
	.irq_tx_complete = uart_numaker_irq_tx_complete,
	.irq_rx_enable = uart_numaker_irq_rx_enable,
	.irq_rx_disable = uart_numaker_irq_rx_disable,
	.irq_rx_ready = uart_numaker_irq_rx_ready,
	.irq_err_enable = uart_numaker_irq_err_enable,
	.irq_err_disable = uart_numaker_irq_err_disable,
	.irq_is_pending = uart_numaker_irq_is_pending,
	.irq_update = uart_numaker_irq_update,
	.irq_callback_set = uart_numaker_irq_callback_set,
	#endif
	};

	#define CLOCK_CTRL_INIT(n) .clk_dev = DEVICE_DT_GET(DT_PARENT(DT_INST_CLOCKS_CTLR(n))),

	#define PINCTRL_DEFINE(n) PINCTRL_DT_INST_DEFINE(n);
	#define PINCTRL_INIT(n) .pincfg = PINCTRL_DT_INST_DEV_CONFIG_GET(n),

	#ifdef CONFIG_UART_INTERRUPT_DRIVEN
	#define NUMAKER_UART_IRQ_CONFIG_FUNC(n) \
	static void uart_numaker_irq_config_##n(const struct device *dev) \
	{ \
	IRQ_CONNECT(DT_INST_IRQN(n), DT_INST_IRQ(n, priority), uart_numaker_isr, \
	DEVICE_DT_INST_GET(n), 0); \
	irq_enable(DT_INST_IRQN(n)); \
	}
	#define IRQ_FUNC_INIT(n) .irq_config_func = uart_numaker_irq_config_##n
	#else
	#define NUMAKER_UART_IRQ_CONFIG_FUNC(n)
	#define IRQ_FUNC_INIT(n)
	#endif

	#define NUMAKER_UART_INIT(inst) \
	PINCTRL_DEFINE(inst) \
	NUMAKER_UART_IRQ_CONFIG_FUNC(inst) \
	\
	static const struct uart_numaker_config uart_numaker_cfg_##inst = { \
	.uart = (UART_T *)DT_INST_REG_ADDR(inst), \
	.reset = RESET_DT_SPEC_INST_GET(inst), \
	.clk_modidx = DT_INST_CLOCKS_CELL(inst, clock_module_index), \
	.clk_src = DT_INST_CLOCKS_CELL(inst, clock_source), \
	.clk_div = DT_INST_CLOCKS_CELL(inst, clock_divider), \
	CLOCK_CTRL_INIT(inst).irq_n = DT_INST_IRQN(inst), \
	PINCTRL_INIT(inst) IRQ_FUNC_INIT(inst)}; \
	\
	static struct uart_numaker_data uart_numaker_data_##inst = { \
	.ucfg = \
	{ \
	.baudrate = DT_INST_PROP(inst, current_speed), \
	}, \
	}; \
	\
	DEVICE_DT_INST_DEFINE(inst, &uart_numaker_init, NULL, &uart_numaker_data_##inst, \
	&uart_numaker_cfg_##inst, PRE_KERNEL_1, CONFIG_SERIAL_INIT_PRIORITY, \
	&uart_numaker_driver_api);

	DT_INST_FOREACH_STATUS_OKAY(NUMAKER_UART_INIT)