Re: [PATCH v4 0/4] Add STM32 DMAMUX support
From: Pierre Yves MORDRET
Date: Thu Sep 21 2017 - 04:00:21 EST
Gentle ping for driver review since DT Bindings have been acked by Rob Herring.
On 09/07/2017 01:52 PM, Pierre-Yves MORDRET wrote:
> This patchset adds support for the STM32 DMA multiplexer.
> It allows to map any peripheral DMA request to any channel of the product
> This IP has been introduced with STM32H7 SoC.
> Version history:
> * Add multi-master ability for STM32 DMAMUX
> * Get rid of st,dmamux property and custom API between STM32
> DMAMUX and DMA. Bindings has changed.
> DMAMUX will read DMA masters from Device Tree from now on.
> Merely one DMAMUX node is needed now.
> * Only STM32 DMA are allowed to be connected onto DMAMUX
> * channelID is computed locally within the driver and crafted in
> dma_psec to be passed toward DMA master.
> DMAMUX router sorts out which DMA master will serve the
> request automatically.
> * This version forbids the use of DMA in standalone and DMAMUX at
> the same time : all clients need to be connected either on DMA
> or DMAMUX ; no mix up
> * change compatible to st,stm32h7-dmamux to be mode Soc specific
> * add verbosity in dma-cells
> Pierre-Yves MORDRET (4):
> dt-bindings: Document the STM32 DMAMUX bindings
> dmaengine: Add STM32 DMAMUX driver
> dt-bindings: stm32-dma: add a property to handle STM32 DMAMUX
> ARM: configs: stm32: Add MDMA support in STM32 defconfig
> .../devicetree/bindings/dma/stm32-dma.txt | 4 +-
> .../devicetree/bindings/dma/stm32-dmamux.txt | 84 ++++++
> arch/arm/configs/stm32_defconfig | 1 +
> drivers/dma/Kconfig | 9 +
> drivers/dma/Makefile | 1 +
> drivers/dma/stm32-dmamux.c | 321 +++++++++++++++++++++
> 6 files changed, 419 insertions(+), 1 deletion(-)
> create mode 100644 Documentation/devicetree/bindings/dma/stm32-dmamux.txt
> create mode 100644 drivers/dma/stm32-dmamux.c