zephyr/drivers/spi/Kconfig.sam

# Atmel SAM SPI

# Copyright (c) 2019 Gerson Fernando Budke
# Copyright (c) 2018 qianfan Zhao
# SPDX-License-Identifier: Apache-2.0

config SPI_SAM
	bool "Atmel SAM series SPI driver"
	default y
	depends on DT_HAS_ATMEL_SAM_SPI_ENABLED
	select GPIO
	help
	  Enable support for the SAM SPI driver.

if SPI_SAM
config SPI_SAM_DMA
	bool "SPI SAM DMA Support"
	select DMA
	help
	  Enable using DMA with SPI for SPI instances that enable dma channels in
	  their device tree node.

if SPI_RTIO
config SPI_SAM_RTIO_SQ_SIZE
	int "Number of avialable submission queue entries"
	default 8 # Sensible default that covers most common spi transactions
	help
	  When RTIO is use with SPI each driver holds a context with which blocking
	  API calls use to perform SPI transactions. This queue needs to be as deep
	  as the longest set of spi_buf_sets used, where normal SPI operations are
	  used (equal length buffers). It may need to be slightly deeper where the
	  spi buffer sets for transmit/receive are not always matched equally in
	  length as these are transformed into normal transceives.

endif # SPI_RTIO

endif # SPI_SAM