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# 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