This patchset adds support for the STM32 MDMA controller.
The Master Direct memory access (MDMA) provides high-speed data transfer
between memory and memory or between peripherals and memory.
Contrary to STM32 DMA, the STM32 MDMA controller supports hardware LLI and
uses a larger integrated FIFO (128 vs 16 bytes)
---
Version history:
v4:
* Add safe getter/setter macros
* forbid DMA preparation in cyclic mode yet
* Optimize burst and memory width for memcpy
* replace of_property_xx by device_property_xx
v3:
* Update header template
* Unsigned expression compared with zero
* Rework stm32_mdma_get_max_width
* moved to src/dst case where they are used in set_xfer
* Change of_property_* with device_property_*
* Add dev_warn whether default value is used
* Indentation
* Add MODULE_*
v2:
* change compatible into st,stm32h7-mdma to be more SoC specific
* Add MDMA support in DT for H7
* Add MDMA support in STM32 defconfig
---
Pierre-Yves MORDRET (4):
dt-bindings: Document the STM32 MDMA bindings
dmaengine: Add STM32 MDMA driver
ARM: dts: stm32: Add MDMA support for STM32H743 SoC
ARM: configs: stm32: Add MDMA support in STM32 defconfig
.../devicetree/bindings/dma/stm32-mdma.txt | 94 ++
arch/arm/boot/dts/stm32h743.dtsi | 10 +
arch/arm/configs/stm32_defconfig | 1 +
drivers/dma/Kconfig | 12 +
drivers/dma/Makefile | 1 +
drivers/dma/stm32-mdma.c | 1618 ++++++++++++++++++++
6 files changed, 1736 insertions(+)
create mode 100644 Documentation/devicetree/bindings/dma/stm32-mdma.txt
create mode 100644 drivers/dma/stm32-mdma.c
--
2.7.4
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