linux-kernel - Re: [RESEND PATCH v5 0/4] Add STM32 DMAMUX support

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Date:   Wed, 27 Sep 2017 14:31:03 +0200
From:   Pierre Yves MORDRET <pierre-yves.mordret@...com>
To:     Vinod Koul <vinod.koul@...el.com>
CC:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Russell King <linux@...linux.org.uk>,
        Dan Williams <dan.j.williams@...el.com>,
        "M'boumba Cedric Madianga" <cedric.madianga@...il.com>,
        Fabrice GASNIER <fabrice.gasnier@...com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Fabien DESSENNE <fabien.dessenne@...com>,
        Amelie Delaunay <amelie.delaunay@...com>,
        <dmaengine@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [RESEND PATCH v5 0/4] Add STM32 DMAMUX support

Thanks Vinod.
The fourth is going to be managed by ARM team.

Regards

On 09/27/2017 12:36 PM, Vinod Koul wrote:
> On Fri, Sep 22, 2017 at 09:31:28AM +0200, 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
>> DMAs.
>> This IP has been introduced with STM32H7 SoC.
> 
> Applied first three patches, thanks
> 
>> ---
>>  Version history:
>>     v5:
>>         * Set selected channel ID within a lock to avoid race condition.
>>           Release if any error occurs
>>     v4:
>>         * 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
>>     v3:
>>         * 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 DMAMUX 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                         | 327 +++++++++++++++++++++
>>  6 files changed, 425 insertions(+), 1 deletion(-)
>>  create mode 100644 Documentation/devicetree/bindings/dma/stm32-dmamux.txt
>>  create mode 100644 drivers/dma/stm32-dmamux.c
>>
>> -- 
>> 2.7.4
>>
>