| # SPDX-FileCopyrightText: Copyright (c) 2026 STMicroelectronics |
| # SPDX-License-Identifier: Apache-2.0 |
| |
| menuconfig CRC_STM32 |
| bool "STM32 CRC driver" |
| default y |
| depends on DT_HAS_ST_STM32_CRC_ENABLED |
| select CRC_DRIVER_HAS_CRC7_BE |
| select CRC_DRIVER_HAS_CRC8 |
| select CRC_DRIVER_HAS_CRC16 |
| select CRC_DRIVER_HAS_CRC16_CCITT |
| select CRC_DRIVER_HAS_CRC32_C |
| select CRC_DRIVER_HAS_CRC32_IEEE |
| help |
| Enables STM32 family CRC driver. |
| |
| if CRC_STM32 |
| |
| config CRC_STM32_DMA |
| bool "DMA support" |
| select DMA |
| help |
| Enable the DMA transfer for CRC instance |
| That enables dma channel in their device tree node |
| for transferring data to the CRC input |
| |
| if CRC_STM32_DMA |
| |
| config CRC_STM32_DMA_THRESHOLD |
| int "Minimal buffer size for DMA transfers" |
| default 1 |
| range 1 $(UINT32_MAX) |
| help |
| Minimum size required to use DMA transfers for copy of |
| buffer provided to crc_update() towards CRC peripheral. |
| |
| If buffer size is superior or equal to this option's value, |
| a DMA transfer is used to copy the buffer's contents towards |
| the CRC peripheral using a DMA transfer (while the transfer |
| is ongoing, another thread can execute on the CPU). |
| |
| If buffer size is strictly less than this option's value, |
| the CPU is used to copy the buffer's contents towards the |
| CRC peripheral (busy CPU copy / DMA not used). |
| |
| The default value of 1 forces a DMA transfer to be used |
| unconditionally by crc_update() regardless of buffer size. |
| |
| endif # CRC_STM32_DMA |
| |
| endif # CRC_STM32 |
