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Subject[PATCH v5 3/4] dt-bindings: stm32-dma: add a property to handle STM32 DMAMUX
Date
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>
---
Version history:
v5:
v4:
* get rid of st,dmamux property
* number of DMA requests is exposed for DMAMUX
v3:
* None
v2:
* Typo fix
---
---
Documentation/devicetree/bindings/dma/stm32-dma.txt | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/dma/stm32-dma.txt b/Documentation/devicetree/bindings/dma/stm32-dma.txt
index 4408af6..77542e1 100644
--- a/Documentation/devicetree/bindings/dma/stm32-dma.txt
+++ b/Documentation/devicetree/bindings/dma/stm32-dma.txt
@@ -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
--
2.7.4
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