| # 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 |
