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dt-bindings: stm32-dma: add a property to handle STM32 DMAMUX

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STM32 DMA controller has to exposed its number of request line to be
addressed via STM32 DMAMUX.

Signed-off-by: M'boumba Cedric Madianga <cedric.madianga@gmail.com>
Signed-off-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Pierre-Yves MORDRET 2017-09-22 09:31:31 +02:00 committed by Vinod Koul
parent df7e762db5
commit 6e10d19b14
1 changed files with 3 additions and 1 deletions
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4
Documentation/devicetree/bindings/dma/stm32-dma.txt
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@ -13,6 +13,7 @@ Required properties:
- #dma-cells : Must be <4>. See DMA client paragraph for more details.
Optional properties:
- dma-requests : Number of DMA requests supported.
- resets: Reference to a reset controller asserting the DMA controller
- st,mem2mem: boolean; if defined, it indicates that the controller supports
memory-to-memory transfer
@ -34,12 +35,13 @@ Example:
#dma-cells = <4>;
st,mem2mem;
resets = <&rcc 150>;
dma-requests = <8>;
};
* DMA client
DMA clients connected to the STM32 DMA controller must use the format
described in the dma.txt file, using a five-cell specifier for each
described in the dma.txt file, using a four-cell specifier for each
channel: a phandle to the DMA controller plus the following four integer cells:
1. The channel id