drivers/serial/Kconfig.max32

# MAX32 UART configuration

# Copyright (c) 2023-2024 Analog Devices, Inc.
# SPDX-License-Identifier: Apache-2.0

config UART_MAX32
	bool "MAX32 MCU serial driver"
	default y
	depends on DT_HAS_ADI_MAX32_UART_ENABLED
	select SERIAL_HAS_DRIVER
	select SERIAL_SUPPORT_INTERRUPT
	select PINCTRL
	select SERIAL_SUPPORT_ASYNC if DT_HAS_ADI_MAX32_DMA_ENABLED && !SOC_FAMILY_MAX32_RV32
	select DMA if UART_ASYNC_API
	help
	  This option enables the UART driver for MAX32 family of
	  processors.
	  Say y if you wish to use serial port on MAX32 MCU.

config UART_MAX32_TX_IRQ_WORKAROUND
	bool
	default y if SOC_MAX32690 || SOC_MAX32655 || SOC_MAX32657 || \
		SOC_MAX32666 || SOC_MAX32670 || SOC_MAX32672 || SOC_MAX32675
	depends on UART_MAX32 && UART_INTERRUPT_DRIVEN
	help
		Workaround for the subset of MAX32 MCUs that have errata regarding
		failing to consistently raise interrupts for TX half/almost empty
		flags.

if UART_MAX32_TX_IRQ_WORKAROUND

config UART_MAX32_TX_IRQ_WORKAROUND_POLL_US
	int "Interval for checking for TX completion"
	default 500
	help
		Timer interval for checking the TX FIFO status, for platforms where
		the TX half/almost empty interrupts may sometimes fail to raise.

endif

config UART_MAX32_TX_AE_WORKAROUND
	bool
	select DEPRECATED
	depends on UART_MAX32 && UART_INTERRUPT_DRIVEN
	help
		This option enables a small workaround for almost-empty interrupts
		not firing on TX of small amounts. This option is deprecated, in favor
		of more complete interrupt workaround for the necessary platforms.

if UART_MAX32

config UART_TX_CACHE_LEN
	int "TX cache buffer size"
	range 8 64
	default 8
	help
	  Size of UART transmit buffer that is used when source buffer
	  is not located in a DMA-able region.

endif # UART_MAX32