Re: [PATCH 6/7] dt-bindings: dmaengine: at_xdmac: add optional microchip,m2m property
From: Rob Herring <robh@kernel.org>
Date: 2020-09-22 23:33:31
Also in:
dmaengine, linux-devicetree, lkml
On Mon, Sep 14, 2020 at 05:09:55PM +0300, Eugen Hristev wrote:
quoted hunk ↗ jump to hunk
Add optional microchip,m2m property that specifies if a controller is dedicated to memory to memory operations only. Signed-off-by: Eugen Hristev <redacted> --- Documentation/devicetree/bindings/dma/atmel-xdma.txt | 6 ++++++ 1 file changed, 6 insertions(+)diff --git a/Documentation/devicetree/bindings/dma/atmel-xdma.txt b/Documentation/devicetree/bindings/dma/atmel-xdma.txt index 510b7f25ba24..642da6b95a29 100644 --- a/Documentation/devicetree/bindings/dma/atmel-xdma.txt +++ b/Documentation/devicetree/bindings/dma/atmel-xdma.txt@@ -15,6 +15,12 @@ the dmas property of client devices. interface identifier, - bit 30-24: PERID, peripheral identifier. +Optional properties: +- microchip,m2m: this controller is connected on AXI only to memory and it's + dedicated to memory to memory DMA operations. If this option is + missing, it's assumed that the DMA controller is connected to + peripherals, thus it's a per2mem and mem2per.
Wouldn't 'dma-requests = <0>' cover this case? Rob _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel