kevin/linux
1
Fork 0
Code
master
linux/drivers/dma/stm32/Kconfig

48 lines
1.3 KiB
Plaintext
Raw Permalink Normal View History

dmaengine: stm32: New directory for STM32 DMA controllers drivers Gather the STM32 DMA controllers under drivers/dma/stm32/ Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com> Link: https://lore.kernel.org/r/20240531150712.2503554-3-amelie.delaunay@foss.st.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2024-05-31 08:07:02 -07:00
# SPDX-License-Identifier: GPL-2.0-only
#
# STM32 DMA controllers drivers
#
if ARCH_STM32 || COMPILE_TEST
config STM32_DMA
bool "STMicroelectronics STM32 DMA support"
select DMA_ENGINE
select DMA_VIRTUAL_CHANNELS
help
Enable support for the on-chip DMA controller on STMicroelectronics
STM32 platforms.
If you have a board based on STM32 SoC with such DMA controller
and want to use DMA say Y here.
config STM32_DMAMUX
bool "STMicroelectronics STM32 DMA multiplexer support"
depends on STM32_DMA
help
Enable support for the on-chip DMA multiplexer on STMicroelectronics
STM32 platforms.
If you have a board based on STM32 SoC with such DMA multiplexer
and want to use DMAMUX say Y here.
config STM32_MDMA
bool "STMicroelectronics STM32 master DMA support"
depends on OF
select DMA_ENGINE
select DMA_VIRTUAL_CHANNELS
help
Enable support for the on-chip MDMA controller on STMicroelectronics
STM32 platforms.
If you have a board based on STM32 SoC with such DMA controller
and want to use MDMA say Y here.
dmaengine: Add STM32 DMA3 support STM32 DMA3 driver supports the 3 hardware configurations of the STM32 DMA3 controller: - LPDMA (Low Power): 4 channels, no FIFO - GPDMA (General Purpose): 16 channels, FIFO from 8 to 32 bytes - HPDMA (High Performance): 16 channels, FIFO from 8 to 256 bytes Hardware configuration of the channels is retrieved from the hardware configuration registers. The client can specify its channel requirements through device tree. STM32 DMA3 channels can be individually reserved either because they are secure, or dedicated to another CPU. Indeed, channels availability depends on Resource Isolation Framework (RIF) configuration. RIF grants access to buses with Compartment ID (CID) filtering, secure and privilege level. It also assigns DMA channels to one or several processors. DMA channels used by Linux should be CID-filtered and statically assigned to CID1 or shared with other CPUs but using semaphore. In case CID filtering is not configured, dma-channel-mask property can be used to specify available DMA channels to the kernel, otherwise such channels will be marked as reserved and can't be used by Linux. STM32 DMA3 is a new STM32 DMA controller, not a new version of an existing one. stm32-dma is not considered for reuse because register layout is completely different and doesn't rely on descriptors mechanism. stm32-mdma is based on descriptors mechanism but there are significant differences in register layout and descriptors structure. Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com> Link: https://lore.kernel.org/r/20240531150712.2503554-6-amelie.delaunay@foss.st.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2024-05-31 08:07:05 -07:00
config STM32_DMA3
tristate "STMicroelectronics STM32 DMA3 support"
select DMA_ENGINE
select DMA_VIRTUAL_CHANNELS
help
Enable support for the on-chip DMA3 controller on STMicroelectronics
STM32 platforms.
If you have a board based on STM32 SoC with such DMA3 controller
and want to use DMA3, say Y here.
dmaengine: stm32: New directory for STM32 DMA controllers drivers Gather the STM32 DMA controllers under drivers/dma/stm32/ Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com> Link: https://lore.kernel.org/r/20240531150712.2503554-3-amelie.delaunay@foss.st.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2024-05-31 08:07:02 -07:00
endif
Copy Permalink