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

 /*
  * Copyright (c) 2017, Christian Taedcke
  * Copyright (c) 2020 Lemonbeat GmbH
  *
  * SPDX-License-Identifier: Apache-2.0
  */

 #include <errno.h>
 #include <zephyr/drivers/uart.h>
 #include <zephyr/irq.h>
 #include <em_usart.h>
 #include <em_gpio.h>
 #include <em_cmu.h>
 #include <soc.h>

 #define USART_PREFIX cmuClock_USART
 #define UART_PREFIX cmuClock_UART
 #define CLOCK_USART(id) _CONCAT(USART_PREFIX, id)
 #define CLOCK_UART(id) _CONCAT(UART_PREFIX, id)

 /* Helper define to determine if SOC supports hardware flow control */
 #if ((_SILICON_LABS_32B_SERIES > 0) || \
 	(defined(_USART_ROUTEPEN_RTSPEN_MASK) && \
 	defined(_USART_ROUTEPEN_CTSPEN_MASK)))
 #define HW_FLOWCONTROL_IS_SUPPORTED_BY_SOC
 #endif

 #define HAS_HFC_OR(inst) DT_INST_PROP(inst, hw_flow_control) ||

 #define DT_DRV_COMPAT silabs_gecko_uart

 /* Has any enabled uart instance hw-flow-control enabled? */
 #define UART_GECKO_UART_HW_FLOW_CONTROL_ENABLED \
 	DT_INST_FOREACH_STATUS_OKAY(HAS_HFC_OR) 0

 #undef DT_DRV_COMPAT
 #define DT_DRV_COMPAT silabs_gecko_usart

 /* Has any enabled usart instance hw-flow-control enabled? */
 #define UART_GECKO_USART_HW_FLOW_CONTROL_ENABLED  \
 	DT_INST_FOREACH_STATUS_OKAY(HAS_HFC_OR) 0

 #if UART_GECKO_USART_HW_FLOW_CONTROL_ENABLED || \
 	UART_GECKO_UART_HW_FLOW_CONTROL_ENABLED
 #define UART_GECKO_HW_FLOW_CONTROL
 #endif

 /* Sanity check for hardware flow control */
 #if defined(UART_GECKO_HW_FLOW_CONTROL) && \
 	(!(defined(HW_FLOWCONTROL_IS_SUPPORTED_BY_SOC)))
 #error "Hardware flow control is activated for at least one UART/USART, \
 but not supported by this SOC"
 #endif

 #if defined(UART_GECKO_HW_FLOW_CONTROL) && \
 	(!defined(CONFIG_SOC_GECKO_HAS_INDIVIDUAL_PIN_LOCATION) && \
 	 !defined(GPIO_USART_ROUTEEN_RTSPEN))
 #error "Driver not supporting hardware flow control for this SOC"
 #endif

 /**
  * @brief Config struct for UART
  */
 struct uart_gecko_config {
 	USART_TypeDef *base;
 	CMU_Clock_TypeDef clock;
 	uint32_t baud_rate;
 #ifdef UART_GECKO_HW_FLOW_CONTROL
 	bool hw_flowcontrol;
 #endif
 #ifdef CONFIG_UART_INTERRUPT_DRIVEN
 	void (*irq_config_func)(const struct device *dev);
 #endif
 	struct soc_gpio_pin pin_rx;
 	struct soc_gpio_pin pin_tx;
 #ifdef UART_GECKO_HW_FLOW_CONTROL
 	struct soc_gpio_pin pin_rts;
 	struct soc_gpio_pin pin_cts;
 #endif
 #ifdef CONFIG_SOC_GECKO_HAS_INDIVIDUAL_PIN_LOCATION
 	uint8_t loc_rx;
 	uint8_t loc_tx;
 #ifdef UART_GECKO_HW_FLOW_CONTROL
 	uint8_t loc_rts;
 	uint8_t loc_cts;
 #endif
 #else
 	uint8_t loc;
 #endif
 };

 struct uart_gecko_data {
 #ifdef CONFIG_UART_INTERRUPT_DRIVEN
 	uart_irq_callback_user_data_t callback;
 	void *cb_data;
 #endif
 };

 static int uart_gecko_poll_in(const struct device *dev, unsigned char *c)
 {
 	const struct uart_gecko_config *config = dev->config;
 	uint32_t flags = USART_StatusGet(config->base);

 	if (flags & USART_STATUS_RXDATAV) {
 		*c = USART_Rx(config->base);
 		return 0;
 	}

 	return -1;
 }

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

 	USART_Tx(config->base, c);
 }

 static int uart_gecko_err_check(const struct device *dev)
 {
 	const struct uart_gecko_config *config = dev->config;
 	uint32_t flags = USART_IntGet(config->base);
 	int err = 0;

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

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

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

 	USART_IntClear(config->base, USART_IF_RXOF |
 		       USART_IF_PERR |
 		       USART_IF_FERR);

 	return err;
 }

 #ifdef CONFIG_UART_INTERRUPT_DRIVEN
 static int uart_gecko_fifo_fill(const struct device *dev, const uint8_t *tx_data,
 			       int len)
 {
 	const struct uart_gecko_config *config = dev->config;
 	uint8_t num_tx = 0U;

 	while ((len - num_tx > 0) &&
 	       (config->base->STATUS & USART_STATUS_TXBL)) {

 		config->base->TXDATA = (uint32_t)tx_data[num_tx++];
 	}

 	return num_tx;
 }

 static int uart_gecko_fifo_read(const struct device *dev, uint8_t *rx_data,
 			       const int len)
 {
 	const struct uart_gecko_config *config = dev->config;
 	uint8_t num_rx = 0U;

 	while ((len - num_rx > 0) &&
 	       (config->base->STATUS & USART_STATUS_RXDATAV)) {

 		rx_data[num_rx++] = (uint8_t)config->base->RXDATA;
 	}

 	return num_rx;
 }

 static void uart_gecko_irq_tx_enable(const struct device *dev)
 {
 	const struct uart_gecko_config *config = dev->config;
 	uint32_t mask = USART_IEN_TXBL | USART_IEN_TXC;

 	USART_IntEnable(config->base, mask);
 }

 static void uart_gecko_irq_tx_disable(const struct device *dev)
 {
 	const struct uart_gecko_config *config = dev->config;
 	uint32_t mask = USART_IEN_TXBL | USART_IEN_TXC;

 	USART_IntDisable(config->base, mask);
 }

 static int uart_gecko_irq_tx_complete(const struct device *dev)
 {
 	const struct uart_gecko_config *config = dev->config;
 	uint32_t flags = USART_IntGet(config->base);

 	USART_IntClear(config->base, USART_IF_TXC);

 	return (flags & USART_IF_TXC) != 0U;
 }

 static int uart_gecko_irq_tx_ready(const struct device *dev)
 {
 	const struct uart_gecko_config *config = dev->config;
 	uint32_t flags = USART_IntGetEnabled(config->base);

 	return (flags & USART_IF_TXBL) != 0U;
 }

 static void uart_gecko_irq_rx_enable(const struct device *dev)
 {
 	const struct uart_gecko_config *config = dev->config;
 	uint32_t mask = USART_IEN_RXDATAV;

 	USART_IntEnable(config->base, mask);
 }

 static void uart_gecko_irq_rx_disable(const struct device *dev)
 {
 	const struct uart_gecko_config *config = dev->config;
 	uint32_t mask = USART_IEN_RXDATAV;

 	USART_IntDisable(config->base, mask);
 }

 static int uart_gecko_irq_rx_full(const struct device *dev)
 {
 	const struct uart_gecko_config *config = dev->config;
 	uint32_t flags = USART_IntGet(config->base);

 	return (flags & USART_IF_RXDATAV) != 0U;
 }

 static int uart_gecko_irq_rx_ready(const struct device *dev)
 {
 	const struct uart_gecko_config *config = dev->config;
 	uint32_t mask = USART_IEN_RXDATAV;

 	return (config->base->IEN & mask)
 		&& uart_gecko_irq_rx_full(dev);
 }

 static void uart_gecko_irq_err_enable(const struct device *dev)
 {
 	const struct uart_gecko_config *config = dev->config;

 	USART_IntEnable(config->base, USART_IF_RXOF |
 			 USART_IF_PERR |
 			 USART_IF_FERR);
 }

 static void uart_gecko_irq_err_disable(const struct device *dev)
 {
 	const struct uart_gecko_config *config = dev->config;

 	USART_IntDisable(config->base, USART_IF_RXOF |
 			 USART_IF_PERR |
 			 USART_IF_FERR);
 }

 static int uart_gecko_irq_is_pending(const struct device *dev)
 {
 	return uart_gecko_irq_tx_ready(dev) || uart_gecko_irq_rx_ready(dev);
 }

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

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

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

 static void uart_gecko_isr(const struct device *dev)
 {
 	struct uart_gecko_data *data = dev->data;

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

 /**
  * @brief Subroutine initializer of UART pins
  *
  * @param dev UART device to configure
  */
 static void uart_gecko_init_pins(const struct device *dev)
 {
 	const struct uart_gecko_config *config = dev->config;

 	/* Configure RX and TX */
 	soc_gpio_configure(&config->pin_rx);
 	soc_gpio_configure(&config->pin_tx);

 #ifdef CONFIG_SOC_GECKO_HAS_INDIVIDUAL_PIN_LOCATION
 	/* For SOCs with configurable pin locations (set in SOC Kconfig) */
 	config->base->ROUTEPEN = USART_ROUTEPEN_RXPEN | USART_ROUTEPEN_TXPEN;
 	config->base->ROUTELOC0 =
 		(config->loc_tx << _USART_ROUTELOC0_TXLOC_SHIFT) |
 		(config->loc_rx << _USART_ROUTELOC0_RXLOC_SHIFT);
 	config->base->ROUTELOC1 = _USART_ROUTELOC1_RESETVALUE;
 #elif defined(USART_ROUTE_RXPEN) && defined(USART_ROUTE_TXPEN)
 	/* For olders SOCs with only one pin location */
 	config->base->ROUTE = USART_ROUTE_RXPEN | USART_ROUTE_TXPEN
 		| (config->loc << 8);
 #elif defined(GPIO_USART_ROUTEEN_RXPEN) && defined(GPIO_USART_ROUTEEN_TXPEN)
 	GPIO->USARTROUTE[USART_NUM(config->base)].ROUTEEN =
 		GPIO_USART_ROUTEEN_TXPEN | GPIO_USART_ROUTEEN_RXPEN;
 	GPIO->USARTROUTE[USART_NUM(config->base)].TXROUTE =
 		(config->pin_tx.pin << _GPIO_USART_TXROUTE_PIN_SHIFT) |
 		(config->pin_tx.port << _GPIO_USART_TXROUTE_PORT_SHIFT);
 	GPIO->USARTROUTE[USART_NUM(config->base)].RXROUTE =
 		(config->pin_rx.pin << _GPIO_USART_RXROUTE_PIN_SHIFT) |
 		(config->pin_rx.port << _GPIO_USART_RXROUTE_PORT_SHIFT);
 #endif /* CONFIG_SOC_GECKO_HAS_INDIVIDUAL_PIN_LOCATION */

 #ifdef UART_GECKO_HW_FLOW_CONTROL
 	/* Configure HW flow control (RTS, CTS) */
 	if (config->hw_flowcontrol) {
 		soc_gpio_configure(&config->pin_rts);
 		soc_gpio_configure(&config->pin_cts);

 #ifdef CONFIG_SOC_GECKO_HAS_INDIVIDUAL_PIN_LOCATION
 		config->base->ROUTEPEN =
 			USART_ROUTEPEN_RXPEN  |
 			USART_ROUTEPEN_TXPEN  |
 			USART_ROUTEPEN_RTSPEN |
 			USART_ROUTEPEN_CTSPEN;

 		config->base->ROUTELOC1 =
 			(config->loc_rts << _USART_ROUTELOC1_RTSLOC_SHIFT) |
 			(config->loc_cts << _USART_ROUTELOC1_CTSLOC_SHIFT);
 #elif defined(GPIO_USART_ROUTEEN_RTSPEN) && defined(GPIO_USART_ROUTEEN_CTSPEN)
 	GPIO->USARTROUTE[USART_NUM(config->base)].ROUTEEN =
 		GPIO_USART_ROUTEEN_TXPEN |
 		GPIO_USART_ROUTEEN_RXPEN |
 		GPIO_USART_ROUTEPEN_RTSPEN |
 		GPIO_USART_ROUTEPEN_CTSPEN;

 	GPIO->USARTROUTE[USART_NUM(config->base)].RTSROUTE =
 		(config->pin_rts.pin << _GPIO_USART_RTSROUTE_PIN_SHIFT) |
 		(config->pin_rts.port << _GPIO_USART_RTSROUTE_PORT_SHIFT);
 	GPIO->USARTROUTE[USART_NUM(config->base)].CTSROUTE =
 		(config->pin_cts.pin << _GPIO_USART_CTSROUTE_PIN_SHIFT) |
 		(config->pin_cts.port << _GPIO_USART_CTSROUTE_PORT_SHIFT);
 #endif /* CONFIG_SOC_GECKO_HAS_INDIVIDUAL_PIN_LOCATION */
 	}
 #endif /* UART_GECKO_HW_FLOW_CONTROL */
 }

 /**
  * @brief Main initializer for UART
  *
  * @param dev UART device to be initialized
  * @return int 0
  */
 static int uart_gecko_init(const struct device *dev)
 {
 	const struct uart_gecko_config *config = dev->config;
 	USART_InitAsync_TypeDef usartInit = USART_INITASYNC_DEFAULT;

 	/* The peripheral and gpio clock are already enabled from soc and gpio
 	 * driver
 	 */

 	/* Enable USART clock */
 	CMU_ClockEnable(config->clock, true);

 	/* Init USART */
 	usartInit.baudrate = config->baud_rate;
 #ifdef UART_GECKO_HW_FLOW_CONTROL
 	usartInit.hwFlowControl = config->hw_flowcontrol ?
 		usartHwFlowControlCtsAndRts : usartHwFlowControlNone;
 #endif
 	USART_InitAsync(config->base, &usartInit);

 	/* Initialize USART pins */
 	uart_gecko_init_pins(dev);

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

 	return 0;
 }

 static const struct uart_driver_api uart_gecko_driver_api = {
 	.poll_in = uart_gecko_poll_in,
 	.poll_out = uart_gecko_poll_out,
 	.err_check = uart_gecko_err_check,
 #ifdef CONFIG_UART_INTERRUPT_DRIVEN
 	.fifo_fill = uart_gecko_fifo_fill,
 	.fifo_read = uart_gecko_fifo_read,
 	.irq_tx_enable = uart_gecko_irq_tx_enable,
 	.irq_tx_disable = uart_gecko_irq_tx_disable,
 	.irq_tx_complete = uart_gecko_irq_tx_complete,
 	.irq_tx_ready = uart_gecko_irq_tx_ready,
 	.irq_rx_enable = uart_gecko_irq_rx_enable,
 	.irq_rx_disable = uart_gecko_irq_rx_disable,
 	.irq_rx_ready = uart_gecko_irq_rx_ready,
 	.irq_err_enable = uart_gecko_irq_err_enable,
 	.irq_err_disable = uart_gecko_irq_err_disable,
 	.irq_is_pending = uart_gecko_irq_is_pending,
 	.irq_update = uart_gecko_irq_update,
 	.irq_callback_set = uart_gecko_irq_callback_set,
 #endif
 };

 #undef DT_DRV_COMPAT
 #define DT_DRV_COMPAT silabs_gecko_uart

 #ifdef CONFIG_UART_INTERRUPT_DRIVEN
 #define GECKO_UART_IRQ_HANDLER_DECL(idx)				       \
 	static void uart_gecko_config_func_##idx(const struct device *dev)
 #define GECKO_UART_IRQ_HANDLER_FUNC(idx)				       \
 	.irq_config_func = uart_gecko_config_func_##idx,
 #define GECKO_UART_IRQ_HANDLER(idx)					       \
 	static void uart_gecko_config_func_##idx(const struct device *dev)	       \
 	{								       \
 		IRQ_CONNECT(DT_INST_IRQ_BY_NAME(idx, rx, irq),		       \
 			    DT_INST_IRQ_BY_NAME(idx, rx, priority),	       \
 			    uart_gecko_isr, DEVICE_DT_INST_GET(idx), 0);       \
 		IRQ_CONNECT(DT_INST_IRQ_BY_NAME(idx, tx, irq),		       \
 			    DT_INST_IRQ_BY_NAME(idx, tx, priority),	       \
 			    uart_gecko_isr, DEVICE_DT_INST_GET(idx), 0);       \
 									       \
 		irq_enable(DT_INST_IRQ_BY_NAME(idx, rx, irq));		       \
 		irq_enable(DT_INST_IRQ_BY_NAME(idx, tx, irq));		       \
 	}
 #else /* CONFIG_UART_INTERRUPT_DRIVEN */
 #define GECKO_UART_IRQ_HANDLER_DECL(idx)
 #define GECKO_UART_IRQ_HANDLER_FUNC(idx)
 #define GECKO_UART_IRQ_HANDLER(idx)
 #endif /* CONFIG_UART_INTERRUPT_DRIVEN */

 #ifdef CONFIG_SOC_GECKO_HAS_INDIVIDUAL_PIN_LOCATION
 #define GECKO_UART_RX_TX_PIN_LOCATIONS(idx)				       \
 	.loc_rx = DT_INST_PROP_BY_IDX(idx, location_rx, 0),		       \
 	.loc_tx = DT_INST_PROP_BY_IDX(idx, location_tx, 0),
 #define VALIDATE_GECKO_UART_RX_TX_PIN_LOCATIONS(idx)
 #else
 #define GECKO_UART_RX_TX_PIN_LOCATIONS(idx)				       \
 	.loc = DT_INST_PROP_BY_IDX(idx, location_rx, 0),
 #define VALIDATE_GECKO_UART_RX_TX_PIN_LOCATIONS(idx)			       \
 	BUILD_ASSERT(DT_INST_PROP_BY_IDX(idx, location_rx, 0) ==	       \
 			     DT_INST_PROP_BY_IDX(idx, location_tx, 0),	       \
 		     "DTS location-* properties must have identical value")
 #endif

 #define PIN_UART_RXD(idx)						       \
 	{								       \
 		DT_INST_PROP_BY_IDX(idx, location_rx, 1),		       \
 			DT_INST_PROP_BY_IDX(idx, location_rx, 2),	       \
 			gpioModeInput, 1				       \
 	}
 #define PIN_UART_TXD(idx)						       \
 	{								       \
 		DT_INST_PROP_BY_IDX(idx, location_tx, 1),		       \
 			DT_INST_PROP_BY_IDX(idx, location_tx, 2),	       \
 			gpioModePushPull, 1				       \
 	}

 #define GECKO_UART_RX_TX_PINS(idx)					       \
 	.pin_rx = PIN_UART_RXD(idx),					       \
 	.pin_tx = PIN_UART_TXD(idx),

 #ifdef UART_GECKO_HW_FLOW_CONTROL

 #ifdef CONFIG_SOC_GECKO_HAS_INDIVIDUAL_PIN_LOCATION
 #define GECKO_UART_RTS_CTS_PIN_LOCATIONS(idx)				       \
 	.loc_rts = COND_CODE_1(DT_INST_PROP(idx, hw_flow_control),	       \
 		   (DT_INST_PROP_BY_IDX(idx, location_rts, 0)),		       \
 		   (0)),						       \
 	.loc_cts = COND_CODE_1(DT_INST_PROP(idx, hw_flow_control),	       \
 		   (DT_INST_PROP_BY_IDX(idx, location_cts, 0)),		       \
 		   (0)),
 #define VALIDATE_GECKO_UART_RTS_CTS_PIN_LOCATIONS(idx)			       \
 	COND_CODE_1(DT_INST_PROP(idx, hw_flow_control),			       \
 		    (BUILD_ASSERT(DT_INST_NODE_HAS_PROP(idx, location_rts) &&  \
 				  DT_INST_NODE_HAS_PROP(idx, location_cts),    \
 			"DTS location-rts and location-cts are mandatory")),   \
 		    ())
 #else /* CONFIG_SOC_GECKO_HAS_INDIVIDUAL_PIN_LOCATION */
 /* Hardware flow control not supported for these SOCs */
 #define GECKO_UART_RTS_CTS_PIN_LOCATIONS(idx)
 #define VALIDATE_GECKO_UART_RTS_CTS_PIN_LOCATIONS(idx)
 #endif /* CONFIG_SOC_GECKO_HAS_INDIVIDUAL_PIN_LOCATION */

 #define PIN_UART_RTS(idx)						       \
 	COND_CODE_1(DT_INST_PROP(idx, hw_flow_control),			       \
 	({								       \
 		DT_INST_PROP_BY_IDX(idx, location_rts, 1),		       \
 			DT_INST_PROP_BY_IDX(idx, location_rts, 2),	       \
 			gpioModePushPull, 1				       \
 	}),								       \
 	({0}))

 #define PIN_UART_CTS(idx)						       \
 	COND_CODE_1(DT_INST_PROP(idx, hw_flow_control),			       \
 	({								       \
 		DT_INST_PROP_BY_IDX(idx, location_cts, 1),		       \
 			DT_INST_PROP_BY_IDX(idx, location_cts, 2),	       \
 			gpioModeInput, 1				       \
 	}),								       \
 	({0}))

 #define GECKO_UART_RTS_CTS_PINS(idx)					       \
 	.pin_rts = PIN_UART_RTS(idx),					       \
 	.pin_cts = PIN_UART_CTS(idx),

 #define GECKO_UART_HW_FLOW_CONTROL(idx)					       \
 	.hw_flowcontrol = DT_INST_PROP(idx, hw_flow_control),

 #else /* UART_GECKO_HW_FLOW_CONTROL */

 #define GECKO_UART_RTS_CTS_PIN_LOCATIONS(idx)
 #define VALIDATE_GECKO_UART_RTS_CTS_PIN_LOCATIONS(idx)
 #define GECKO_UART_RTS_CTS_PINS(idx)
 #define GECKO_UART_HW_FLOW_CONTROL(idx)

 #endif /* UART_GECKO_HW_FLOW_CONTROL */

 #define GECKO_UART_INIT(idx)						       \
 	VALIDATE_GECKO_UART_RX_TX_PIN_LOCATIONS(idx);			       \
 	VALIDATE_GECKO_UART_RTS_CTS_PIN_LOCATIONS(idx);			       \
 									       \
 	GECKO_UART_IRQ_HANDLER_DECL(idx);				       \
 									       \
 	static const struct uart_gecko_config uart_gecko_cfg_##idx = {	       \
 		.base = (USART_TypeDef *)DT_INST_REG_ADDR(idx),		       \
 		.clock = CLOCK_UART(DT_INST_PROP(idx, peripheral_id)),	       \
 		.baud_rate = DT_INST_PROP(idx, current_speed),		       \
 		GECKO_UART_HW_FLOW_CONTROL(idx)				       \
 		GECKO_UART_RX_TX_PINS(idx)				       \
 		GECKO_UART_RTS_CTS_PINS(idx)				       \
 		GECKO_UART_RX_TX_PIN_LOCATIONS(idx)			       \
 		GECKO_UART_RTS_CTS_PIN_LOCATIONS(idx)			       \
 		GECKO_UART_IRQ_HANDLER_FUNC(idx)			       \
 	};								       \
 									       \
 	static struct uart_gecko_data uart_gecko_data_##idx;		       \
 									       \
 	DEVICE_DT_INST_DEFINE(idx, &uart_gecko_init, 			       \
 			    NULL, &uart_gecko_data_##idx,		       \
 			    &uart_gecko_cfg_##idx, PRE_KERNEL_1,	       \
 			    CONFIG_SERIAL_INIT_PRIORITY,		       \
 			    &uart_gecko_driver_api);			       \
 									       \
 									       \
 	GECKO_UART_IRQ_HANDLER(idx)

 DT_INST_FOREACH_STATUS_OKAY(GECKO_UART_INIT)

 #undef DT_DRV_COMPAT
 #define DT_DRV_COMPAT silabs_gecko_usart

 #ifdef CONFIG_UART_INTERRUPT_DRIVEN
 #define GECKO_USART_IRQ_HANDLER_DECL(idx)				       \
 	static void usart_gecko_config_func_##idx(const struct device *dev)
 #define GECKO_USART_IRQ_HANDLER_FUNC(idx)				       \
 	.irq_config_func = usart_gecko_config_func_##idx,
 #define GECKO_USART_IRQ_HANDLER(idx)					       \
 	static void usart_gecko_config_func_##idx(const struct device *dev)	       \
 	{								       \
 		IRQ_CONNECT(DT_INST_IRQ_BY_NAME(idx, rx, irq),		       \
 			    DT_INST_IRQ_BY_NAME(idx, rx, priority),	       \
 			    uart_gecko_isr, DEVICE_DT_INST_GET(idx), 0);       \
 		IRQ_CONNECT(DT_INST_IRQ_BY_NAME(idx, tx, irq),		       \
 			    DT_INST_IRQ_BY_NAME(idx, tx, priority),	       \
 			    uart_gecko_isr, DEVICE_DT_INST_GET(idx), 0);       \
 									       \
 		irq_enable(DT_INST_IRQ_BY_NAME(idx, rx, irq));		       \
 		irq_enable(DT_INST_IRQ_BY_NAME(idx, tx, irq));		       \
 	}
 #else
 #define GECKO_USART_IRQ_HANDLER_DECL(idx)
 #define GECKO_USART_IRQ_HANDLER_FUNC(idx)
 #define GECKO_USART_IRQ_HANDLER(idx)
 #endif

 #define GECKO_USART_INIT(idx)						       \
 	VALIDATE_GECKO_UART_RX_TX_PIN_LOCATIONS(idx);			       \
 	VALIDATE_GECKO_UART_RTS_CTS_PIN_LOCATIONS(idx);			       \
 									       \
 	GECKO_USART_IRQ_HANDLER_DECL(idx);				       \
 									       \
 	static const struct uart_gecko_config usart_gecko_cfg_##idx = {	       \
 		.base = (USART_TypeDef *)DT_INST_REG_ADDR(idx),		       \
 		.clock = CLOCK_USART(DT_INST_PROP(idx, peripheral_id)),	       \
 		.baud_rate = DT_INST_PROP(idx, current_speed),		       \
 		GECKO_UART_HW_FLOW_CONTROL(idx)				       \
 		GECKO_UART_RX_TX_PINS(idx)				       \
 		GECKO_UART_RTS_CTS_PINS(idx)				       \
 		GECKO_UART_RX_TX_PIN_LOCATIONS(idx)			       \
 		GECKO_UART_RTS_CTS_PIN_LOCATIONS(idx)			       \
 		GECKO_USART_IRQ_HANDLER_FUNC(idx)			       \
 	};								       \
 									       \
 	static struct uart_gecko_data usart_gecko_data_##idx;		       \
 									       \
 	DEVICE_DT_INST_DEFINE(idx, &uart_gecko_init, NULL,		       \
 			    &usart_gecko_data_##idx,			       \
 			    &usart_gecko_cfg_##idx, PRE_KERNEL_1,	       \
 			    CONFIG_SERIAL_INIT_PRIORITY,		       \
 			    &uart_gecko_driver_api);			       \
 									       \
 	GECKO_USART_IRQ_HANDLER(idx)

 DT_INST_FOREACH_STATUS_OKAY(GECKO_USART_INIT)
	/*
	* Copyright (c) 2017, Christian Taedcke
	* Copyright (c) 2020 Lemonbeat GmbH
	*
	* SPDX-License-Identifier: Apache-2.0
	*/

	#include <errno.h>
	#include <zephyr/drivers/uart.h>
	#include <zephyr/irq.h>
	#include <em_usart.h>
	#include <em_gpio.h>
	#include <em_cmu.h>
	#include <soc.h>

	#define USART_PREFIX cmuClock_USART
	#define UART_PREFIX cmuClock_UART
	#define CLOCK_USART(id) _CONCAT(USART_PREFIX, id)
	#define CLOCK_UART(id) _CONCAT(UART_PREFIX, id)

	/* Helper define to determine if SOC supports hardware flow control */
	#if ((_SILICON_LABS_32B_SERIES > 0) \|\| \
	(defined(_USART_ROUTEPEN_RTSPEN_MASK) && \
	defined(_USART_ROUTEPEN_CTSPEN_MASK)))
	#define HW_FLOWCONTROL_IS_SUPPORTED_BY_SOC
	#endif

	#define HAS_HFC_OR(inst) DT_INST_PROP(inst, hw_flow_control) \|\|

	#define DT_DRV_COMPAT silabs_gecko_uart

	/* Has any enabled uart instance hw-flow-control enabled? */
	#define UART_GECKO_UART_HW_FLOW_CONTROL_ENABLED \
	DT_INST_FOREACH_STATUS_OKAY(HAS_HFC_OR) 0

	#undef DT_DRV_COMPAT
	#define DT_DRV_COMPAT silabs_gecko_usart

	/* Has any enabled usart instance hw-flow-control enabled? */
	#define UART_GECKO_USART_HW_FLOW_CONTROL_ENABLED \
	DT_INST_FOREACH_STATUS_OKAY(HAS_HFC_OR) 0

	#if UART_GECKO_USART_HW_FLOW_CONTROL_ENABLED \|\| \
	UART_GECKO_UART_HW_FLOW_CONTROL_ENABLED
	#define UART_GECKO_HW_FLOW_CONTROL
	#endif

	/* Sanity check for hardware flow control */
	#if defined(UART_GECKO_HW_FLOW_CONTROL) && \
	(!(defined(HW_FLOWCONTROL_IS_SUPPORTED_BY_SOC)))
	#error "Hardware flow control is activated for at least one UART/USART, \
	but not supported by this SOC"
	#endif

	#if defined(UART_GECKO_HW_FLOW_CONTROL) && \
	(!defined(CONFIG_SOC_GECKO_HAS_INDIVIDUAL_PIN_LOCATION) && \
	!defined(GPIO_USART_ROUTEEN_RTSPEN))
	#error "Driver not supporting hardware flow control for this SOC"
	#endif

	/**
	* @brief Config struct for UART
	*/
	struct uart_gecko_config {
	USART_TypeDef *base;
	CMU_Clock_TypeDef clock;
	uint32_t baud_rate;
	#ifdef UART_GECKO_HW_FLOW_CONTROL
	bool hw_flowcontrol;
	#endif
	#ifdef CONFIG_UART_INTERRUPT_DRIVEN
	void (irq_config_func)(const struct device dev);
	#endif
	struct soc_gpio_pin pin_rx;
	struct soc_gpio_pin pin_tx;
	#ifdef UART_GECKO_HW_FLOW_CONTROL
	struct soc_gpio_pin pin_rts;
	struct soc_gpio_pin pin_cts;
	#endif
	#ifdef CONFIG_SOC_GECKO_HAS_INDIVIDUAL_PIN_LOCATION
	uint8_t loc_rx;
	uint8_t loc_tx;
	#ifdef UART_GECKO_HW_FLOW_CONTROL
	uint8_t loc_rts;
	uint8_t loc_cts;
	#endif
	#else
	uint8_t loc;
	#endif
	};

	struct uart_gecko_data {
	#ifdef CONFIG_UART_INTERRUPT_DRIVEN
	uart_irq_callback_user_data_t callback;
	void *cb_data;
	#endif
	};

	static int uart_gecko_poll_in(const struct device dev, unsigned char c)
	{
	const struct uart_gecko_config *config = dev->config;
	uint32_t flags = USART_StatusGet(config->base);

	if (flags & USART_STATUS_RXDATAV) {
	*c = USART_Rx(config->base);
	return 0;
	}

	return -1;
	}

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

	USART_Tx(config->base, c);
	}

	static int uart_gecko_err_check(const struct device *dev)
	{
	const struct uart_gecko_config *config = dev->config;
	uint32_t flags = USART_IntGet(config->base);
	int err = 0;

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

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

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

	USART_IntClear(config->base, USART_IF_RXOF \|
	USART_IF_PERR \|
	USART_IF_FERR);

	return err;
	}

	#ifdef CONFIG_UART_INTERRUPT_DRIVEN
	static int uart_gecko_fifo_fill(const struct device dev, const uint8_t tx_data,
	int len)
	{
	const struct uart_gecko_config *config = dev->config;
	uint8_t num_tx = 0U;

	while ((len - num_tx > 0) &&
	(config->base->STATUS & USART_STATUS_TXBL)) {

	config->base->TXDATA = (uint32_t)tx_data[num_tx++];
	}

	return num_tx;
	}

	static int uart_gecko_fifo_read(const struct device dev, uint8_t rx_data,
	const int len)
	{
	const struct uart_gecko_config *config = dev->config;
	uint8_t num_rx = 0U;

	while ((len - num_rx > 0) &&
	(config->base->STATUS & USART_STATUS_RXDATAV)) {

	rx_data[num_rx++] = (uint8_t)config->base->RXDATA;
	}

	return num_rx;
	}

	static void uart_gecko_irq_tx_enable(const struct device *dev)
	{
	const struct uart_gecko_config *config = dev->config;
	uint32_t mask = USART_IEN_TXBL \| USART_IEN_TXC;

	USART_IntEnable(config->base, mask);
	}

	static void uart_gecko_irq_tx_disable(const struct device *dev)
	{
	const struct uart_gecko_config *config = dev->config;
	uint32_t mask = USART_IEN_TXBL \| USART_IEN_TXC;

	USART_IntDisable(config->base, mask);
	}

	static int uart_gecko_irq_tx_complete(const struct device *dev)
	{
	const struct uart_gecko_config *config = dev->config;
	uint32_t flags = USART_IntGet(config->base);

	USART_IntClear(config->base, USART_IF_TXC);

	return (flags & USART_IF_TXC) != 0U;
	}

	static int uart_gecko_irq_tx_ready(const struct device *dev)
	{
	const struct uart_gecko_config *config = dev->config;
	uint32_t flags = USART_IntGetEnabled(config->base);

	return (flags & USART_IF_TXBL) != 0U;
	}

	static void uart_gecko_irq_rx_enable(const struct device *dev)
	{
	const struct uart_gecko_config *config = dev->config;
	uint32_t mask = USART_IEN_RXDATAV;

	USART_IntEnable(config->base, mask);
	}

	static void uart_gecko_irq_rx_disable(const struct device *dev)
	{
	const struct uart_gecko_config *config = dev->config;
	uint32_t mask = USART_IEN_RXDATAV;

	USART_IntDisable(config->base, mask);
	}

	static int uart_gecko_irq_rx_full(const struct device *dev)
	{
	const struct uart_gecko_config *config = dev->config;
	uint32_t flags = USART_IntGet(config->base);

	return (flags & USART_IF_RXDATAV) != 0U;
	}

	static int uart_gecko_irq_rx_ready(const struct device *dev)
	{
	const struct uart_gecko_config *config = dev->config;
	uint32_t mask = USART_IEN_RXDATAV;

	return (config->base->IEN & mask)
	&& uart_gecko_irq_rx_full(dev);
	}

	static void uart_gecko_irq_err_enable(const struct device *dev)
	{
	const struct uart_gecko_config *config = dev->config;

	USART_IntEnable(config->base, USART_IF_RXOF \|
	USART_IF_PERR \|
	USART_IF_FERR);
	}

	static void uart_gecko_irq_err_disable(const struct device *dev)
	{
	const struct uart_gecko_config *config = dev->config;

	USART_IntDisable(config->base, USART_IF_RXOF \|
	USART_IF_PERR \|
	USART_IF_FERR);
	}

	static int uart_gecko_irq_is_pending(const struct device *dev)
	{
	return uart_gecko_irq_tx_ready(dev) \|\| uart_gecko_irq_rx_ready(dev);
	}

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

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

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

	static void uart_gecko_isr(const struct device *dev)
	{
	struct uart_gecko_data *data = dev->data;

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

	/**
	* @brief Subroutine initializer of UART pins
	*
	* @param dev UART device to configure
	*/
	static void uart_gecko_init_pins(const struct device *dev)
	{
	const struct uart_gecko_config *config = dev->config;

	/* Configure RX and TX */
	soc_gpio_configure(&config->pin_rx);
	soc_gpio_configure(&config->pin_tx);

	#ifdef CONFIG_SOC_GECKO_HAS_INDIVIDUAL_PIN_LOCATION
	/* For SOCs with configurable pin locations (set in SOC Kconfig) */
	config->base->ROUTEPEN = USART_ROUTEPEN_RXPEN \| USART_ROUTEPEN_TXPEN;
	config->base->ROUTELOC0 =
	(config->loc_tx << _USART_ROUTELOC0_TXLOC_SHIFT) \|
	(config->loc_rx << _USART_ROUTELOC0_RXLOC_SHIFT);
	config->base->ROUTELOC1 = _USART_ROUTELOC1_RESETVALUE;
	#elif defined(USART_ROUTE_RXPEN) && defined(USART_ROUTE_TXPEN)
	/* For olders SOCs with only one pin location */
	config->base->ROUTE = USART_ROUTE_RXPEN \| USART_ROUTE_TXPEN
	\| (config->loc << 8);
	#elif defined(GPIO_USART_ROUTEEN_RXPEN) && defined(GPIO_USART_ROUTEEN_TXPEN)
	GPIO->USARTROUTE[USART_NUM(config->base)].ROUTEEN =
	GPIO_USART_ROUTEEN_TXPEN \| GPIO_USART_ROUTEEN_RXPEN;
	GPIO->USARTROUTE[USART_NUM(config->base)].TXROUTE =
	(config->pin_tx.pin << _GPIO_USART_TXROUTE_PIN_SHIFT) \|
	(config->pin_tx.port << _GPIO_USART_TXROUTE_PORT_SHIFT);
	GPIO->USARTROUTE[USART_NUM(config->base)].RXROUTE =
	(config->pin_rx.pin << _GPIO_USART_RXROUTE_PIN_SHIFT) \|
	(config->pin_rx.port << _GPIO_USART_RXROUTE_PORT_SHIFT);
	#endif /* CONFIG_SOC_GECKO_HAS_INDIVIDUAL_PIN_LOCATION */

	#ifdef UART_GECKO_HW_FLOW_CONTROL
	/* Configure HW flow control (RTS, CTS) */
	if (config->hw_flowcontrol) {
	soc_gpio_configure(&config->pin_rts);
	soc_gpio_configure(&config->pin_cts);

	#ifdef CONFIG_SOC_GECKO_HAS_INDIVIDUAL_PIN_LOCATION
	config->base->ROUTEPEN =
	USART_ROUTEPEN_RXPEN \|
	USART_ROUTEPEN_TXPEN \|
	USART_ROUTEPEN_RTSPEN \|
	USART_ROUTEPEN_CTSPEN;

	config->base->ROUTELOC1 =
	(config->loc_rts << _USART_ROUTELOC1_RTSLOC_SHIFT) \|
	(config->loc_cts << _USART_ROUTELOC1_CTSLOC_SHIFT);
	#elif defined(GPIO_USART_ROUTEEN_RTSPEN) && defined(GPIO_USART_ROUTEEN_CTSPEN)
	GPIO->USARTROUTE[USART_NUM(config->base)].ROUTEEN =
	GPIO_USART_ROUTEEN_TXPEN \|
	GPIO_USART_ROUTEEN_RXPEN \|
	GPIO_USART_ROUTEPEN_RTSPEN \|
	GPIO_USART_ROUTEPEN_CTSPEN;

	GPIO->USARTROUTE[USART_NUM(config->base)].RTSROUTE =
	(config->pin_rts.pin << _GPIO_USART_RTSROUTE_PIN_SHIFT) \|
	(config->pin_rts.port << _GPIO_USART_RTSROUTE_PORT_SHIFT);
	GPIO->USARTROUTE[USART_NUM(config->base)].CTSROUTE =
	(config->pin_cts.pin << _GPIO_USART_CTSROUTE_PIN_SHIFT) \|
	(config->pin_cts.port << _GPIO_USART_CTSROUTE_PORT_SHIFT);
	#endif /* CONFIG_SOC_GECKO_HAS_INDIVIDUAL_PIN_LOCATION */
	}
	#endif /* UART_GECKO_HW_FLOW_CONTROL */
	}

	/**
	* @brief Main initializer for UART
	*
	* @param dev UART device to be initialized
	* @return int 0
	*/
	static int uart_gecko_init(const struct device *dev)
	{
	const struct uart_gecko_config *config = dev->config;
	USART_InitAsync_TypeDef usartInit = USART_INITASYNC_DEFAULT;

	/* The peripheral and gpio clock are already enabled from soc and gpio
	* driver
	*/

	/* Enable USART clock */
	CMU_ClockEnable(config->clock, true);

	/* Init USART */
	usartInit.baudrate = config->baud_rate;
	#ifdef UART_GECKO_HW_FLOW_CONTROL
	usartInit.hwFlowControl = config->hw_flowcontrol ?
	usartHwFlowControlCtsAndRts : usartHwFlowControlNone;
	#endif
	USART_InitAsync(config->base, &usartInit);

	/* Initialize USART pins */
	uart_gecko_init_pins(dev);

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

	return 0;
	}

	static const struct uart_driver_api uart_gecko_driver_api = {
	.poll_in = uart_gecko_poll_in,
	.poll_out = uart_gecko_poll_out,
	.err_check = uart_gecko_err_check,
	#ifdef CONFIG_UART_INTERRUPT_DRIVEN
	.fifo_fill = uart_gecko_fifo_fill,
	.fifo_read = uart_gecko_fifo_read,
	.irq_tx_enable = uart_gecko_irq_tx_enable,
	.irq_tx_disable = uart_gecko_irq_tx_disable,
	.irq_tx_complete = uart_gecko_irq_tx_complete,
	.irq_tx_ready = uart_gecko_irq_tx_ready,
	.irq_rx_enable = uart_gecko_irq_rx_enable,
	.irq_rx_disable = uart_gecko_irq_rx_disable,
	.irq_rx_ready = uart_gecko_irq_rx_ready,
	.irq_err_enable = uart_gecko_irq_err_enable,
	.irq_err_disable = uart_gecko_irq_err_disable,
	.irq_is_pending = uart_gecko_irq_is_pending,
	.irq_update = uart_gecko_irq_update,
	.irq_callback_set = uart_gecko_irq_callback_set,
	#endif
	};

	#undef DT_DRV_COMPAT
	#define DT_DRV_COMPAT silabs_gecko_uart

	#ifdef CONFIG_UART_INTERRUPT_DRIVEN
	#define GECKO_UART_IRQ_HANDLER_DECL(idx) \
	static void uart_gecko_config_func_##idx(const struct device *dev)
	#define GECKO_UART_IRQ_HANDLER_FUNC(idx) \
	.irq_config_func = uart_gecko_config_func_##idx,
	#define GECKO_UART_IRQ_HANDLER(idx) \
	static void uart_gecko_config_func_##idx(const struct device *dev) \
	{ \
	IRQ_CONNECT(DT_INST_IRQ_BY_NAME(idx, rx, irq), \
	DT_INST_IRQ_BY_NAME(idx, rx, priority), \
	uart_gecko_isr, DEVICE_DT_INST_GET(idx), 0); \
	IRQ_CONNECT(DT_INST_IRQ_BY_NAME(idx, tx, irq), \
	DT_INST_IRQ_BY_NAME(idx, tx, priority), \
	uart_gecko_isr, DEVICE_DT_INST_GET(idx), 0); \
	\
	irq_enable(DT_INST_IRQ_BY_NAME(idx, rx, irq)); \
	irq_enable(DT_INST_IRQ_BY_NAME(idx, tx, irq)); \
	}
	#else /* CONFIG_UART_INTERRUPT_DRIVEN */
	#define GECKO_UART_IRQ_HANDLER_DECL(idx)
	#define GECKO_UART_IRQ_HANDLER_FUNC(idx)
	#define GECKO_UART_IRQ_HANDLER(idx)
	#endif /* CONFIG_UART_INTERRUPT_DRIVEN */

	#ifdef CONFIG_SOC_GECKO_HAS_INDIVIDUAL_PIN_LOCATION
	#define GECKO_UART_RX_TX_PIN_LOCATIONS(idx) \
	.loc_rx = DT_INST_PROP_BY_IDX(idx, location_rx, 0), \
	.loc_tx = DT_INST_PROP_BY_IDX(idx, location_tx, 0),
	#define VALIDATE_GECKO_UART_RX_TX_PIN_LOCATIONS(idx)
	#else
	#define GECKO_UART_RX_TX_PIN_LOCATIONS(idx) \
	.loc = DT_INST_PROP_BY_IDX(idx, location_rx, 0),
	#define VALIDATE_GECKO_UART_RX_TX_PIN_LOCATIONS(idx) \
	BUILD_ASSERT(DT_INST_PROP_BY_IDX(idx, location_rx, 0) == \
	DT_INST_PROP_BY_IDX(idx, location_tx, 0), \
	"DTS location-* properties must have identical value")
	#endif

	#define PIN_UART_RXD(idx) \
	{ \
	DT_INST_PROP_BY_IDX(idx, location_rx, 1), \
	DT_INST_PROP_BY_IDX(idx, location_rx, 2), \
	gpioModeInput, 1 \
	}
	#define PIN_UART_TXD(idx) \
	{ \
	DT_INST_PROP_BY_IDX(idx, location_tx, 1), \
	DT_INST_PROP_BY_IDX(idx, location_tx, 2), \
	gpioModePushPull, 1 \
	}

	#define GECKO_UART_RX_TX_PINS(idx) \
	.pin_rx = PIN_UART_RXD(idx), \
	.pin_tx = PIN_UART_TXD(idx),

	#ifdef UART_GECKO_HW_FLOW_CONTROL

	#ifdef CONFIG_SOC_GECKO_HAS_INDIVIDUAL_PIN_LOCATION
	#define GECKO_UART_RTS_CTS_PIN_LOCATIONS(idx) \
	.loc_rts = COND_CODE_1(DT_INST_PROP(idx, hw_flow_control), \
	(DT_INST_PROP_BY_IDX(idx, location_rts, 0)), \
	(0)), \
	.loc_cts = COND_CODE_1(DT_INST_PROP(idx, hw_flow_control), \
	(DT_INST_PROP_BY_IDX(idx, location_cts, 0)), \
	(0)),
	#define VALIDATE_GECKO_UART_RTS_CTS_PIN_LOCATIONS(idx) \
	COND_CODE_1(DT_INST_PROP(idx, hw_flow_control), \
	(BUILD_ASSERT(DT_INST_NODE_HAS_PROP(idx, location_rts) && \
	DT_INST_NODE_HAS_PROP(idx, location_cts), \
	"DTS location-rts and location-cts are mandatory")), \
	())
	#else /* CONFIG_SOC_GECKO_HAS_INDIVIDUAL_PIN_LOCATION */
	/* Hardware flow control not supported for these SOCs */
	#define GECKO_UART_RTS_CTS_PIN_LOCATIONS(idx)
	#define VALIDATE_GECKO_UART_RTS_CTS_PIN_LOCATIONS(idx)
	#endif /* CONFIG_SOC_GECKO_HAS_INDIVIDUAL_PIN_LOCATION */

	#define PIN_UART_RTS(idx) \
	COND_CODE_1(DT_INST_PROP(idx, hw_flow_control), \
	({ \
	DT_INST_PROP_BY_IDX(idx, location_rts, 1), \
	DT_INST_PROP_BY_IDX(idx, location_rts, 2), \
	gpioModePushPull, 1 \
	}), \
	({0}))

	#define PIN_UART_CTS(idx) \
	COND_CODE_1(DT_INST_PROP(idx, hw_flow_control), \
	({ \
	DT_INST_PROP_BY_IDX(idx, location_cts, 1), \
	DT_INST_PROP_BY_IDX(idx, location_cts, 2), \
	gpioModeInput, 1 \
	}), \
	({0}))

	#define GECKO_UART_RTS_CTS_PINS(idx) \
	.pin_rts = PIN_UART_RTS(idx), \
	.pin_cts = PIN_UART_CTS(idx),

	#define GECKO_UART_HW_FLOW_CONTROL(idx) \
	.hw_flowcontrol = DT_INST_PROP(idx, hw_flow_control),

	#else /* UART_GECKO_HW_FLOW_CONTROL */

	#define GECKO_UART_RTS_CTS_PIN_LOCATIONS(idx)
	#define VALIDATE_GECKO_UART_RTS_CTS_PIN_LOCATIONS(idx)
	#define GECKO_UART_RTS_CTS_PINS(idx)
	#define GECKO_UART_HW_FLOW_CONTROL(idx)

	#endif /* UART_GECKO_HW_FLOW_CONTROL */

	#define GECKO_UART_INIT(idx) \
	VALIDATE_GECKO_UART_RX_TX_PIN_LOCATIONS(idx); \
	VALIDATE_GECKO_UART_RTS_CTS_PIN_LOCATIONS(idx); \
	\
	GECKO_UART_IRQ_HANDLER_DECL(idx); \
	\
	static const struct uart_gecko_config uart_gecko_cfg_##idx = { \
	.base = (USART_TypeDef *)DT_INST_REG_ADDR(idx), \
	.clock = CLOCK_UART(DT_INST_PROP(idx, peripheral_id)), \
	.baud_rate = DT_INST_PROP(idx, current_speed), \
	GECKO_UART_HW_FLOW_CONTROL(idx) \
	GECKO_UART_RX_TX_PINS(idx) \
	GECKO_UART_RTS_CTS_PINS(idx) \
	GECKO_UART_RX_TX_PIN_LOCATIONS(idx) \
	GECKO_UART_RTS_CTS_PIN_LOCATIONS(idx) \
	GECKO_UART_IRQ_HANDLER_FUNC(idx) \
	}; \
	\
	static struct uart_gecko_data uart_gecko_data_##idx; \
	\
	DEVICE_DT_INST_DEFINE(idx, &uart_gecko_init, \
	NULL, &uart_gecko_data_##idx, \
	&uart_gecko_cfg_##idx, PRE_KERNEL_1, \
	CONFIG_SERIAL_INIT_PRIORITY, \
	&uart_gecko_driver_api); \
	\
	\
	GECKO_UART_IRQ_HANDLER(idx)

	DT_INST_FOREACH_STATUS_OKAY(GECKO_UART_INIT)

	#undef DT_DRV_COMPAT
	#define DT_DRV_COMPAT silabs_gecko_usart

	#ifdef CONFIG_UART_INTERRUPT_DRIVEN
	#define GECKO_USART_IRQ_HANDLER_DECL(idx) \
	static void usart_gecko_config_func_##idx(const struct device *dev)
	#define GECKO_USART_IRQ_HANDLER_FUNC(idx) \
	.irq_config_func = usart_gecko_config_func_##idx,
	#define GECKO_USART_IRQ_HANDLER(idx) \
	static void usart_gecko_config_func_##idx(const struct device *dev) \
	{ \
	IRQ_CONNECT(DT_INST_IRQ_BY_NAME(idx, rx, irq), \
	DT_INST_IRQ_BY_NAME(idx, rx, priority), \
	uart_gecko_isr, DEVICE_DT_INST_GET(idx), 0); \
	IRQ_CONNECT(DT_INST_IRQ_BY_NAME(idx, tx, irq), \
	DT_INST_IRQ_BY_NAME(idx, tx, priority), \
	uart_gecko_isr, DEVICE_DT_INST_GET(idx), 0); \
	\
	irq_enable(DT_INST_IRQ_BY_NAME(idx, rx, irq)); \
	irq_enable(DT_INST_IRQ_BY_NAME(idx, tx, irq)); \
	}
	#else
	#define GECKO_USART_IRQ_HANDLER_DECL(idx)
	#define GECKO_USART_IRQ_HANDLER_FUNC(idx)
	#define GECKO_USART_IRQ_HANDLER(idx)
	#endif

	#define GECKO_USART_INIT(idx) \
	VALIDATE_GECKO_UART_RX_TX_PIN_LOCATIONS(idx); \
	VALIDATE_GECKO_UART_RTS_CTS_PIN_LOCATIONS(idx); \
	\
	GECKO_USART_IRQ_HANDLER_DECL(idx); \
	\
	static const struct uart_gecko_config usart_gecko_cfg_##idx = { \
	.base = (USART_TypeDef *)DT_INST_REG_ADDR(idx), \
	.clock = CLOCK_USART(DT_INST_PROP(idx, peripheral_id)), \
	.baud_rate = DT_INST_PROP(idx, current_speed), \
	GECKO_UART_HW_FLOW_CONTROL(idx) \
	GECKO_UART_RX_TX_PINS(idx) \
	GECKO_UART_RTS_CTS_PINS(idx) \
	GECKO_UART_RX_TX_PIN_LOCATIONS(idx) \
	GECKO_UART_RTS_CTS_PIN_LOCATIONS(idx) \
	GECKO_USART_IRQ_HANDLER_FUNC(idx) \
	}; \
	\
	static struct uart_gecko_data usart_gecko_data_##idx; \
	\
	DEVICE_DT_INST_DEFINE(idx, &uart_gecko_init, NULL, \
	&usart_gecko_data_##idx, \
	&usart_gecko_cfg_##idx, PRE_KERNEL_1, \
	CONFIG_SERIAL_INIT_PRIORITY, \
	&uart_gecko_driver_api); \
	\
	GECKO_USART_IRQ_HANDLER(idx)

	DT_INST_FOREACH_STATUS_OKAY(GECKO_USART_INIT)