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| Started by | Pierre-Yves MORDRET <pierre-yves.mordret@st.com> |
|---|---|
| First post | 2017-07-06 14:30 +0200 |
| Last post | 2017-07-10 06:00 +0200 |
| Articles | 2 — 2 participants |
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[PATCH v3 3/5] dt-bindings: stm32-dma: Add property to handle STM32 DMAMUX Pierre-Yves MORDRET <pierre-yves.mordret@st.com> - 2017-07-06 14:30 +0200
Re: [PATCH v3 3/5] dt-bindings: stm32-dma: Add property to handle STM32 DMAMUX Rob Herring <robh@kernel.org> - 2017-07-10 06:00 +0200
| From | Pierre-Yves MORDRET <pierre-yves.mordret@st.com> |
|---|---|
| Date | 2017-07-06 14:30 +0200 |
| Subject | [PATCH v3 3/5] dt-bindings: stm32-dma: Add property to handle STM32 DMAMUX |
| Message-ID | <u0e4V-4gf-21@gated-at.bofh.it> |
This patch adds an optional property needed for STM32 DMA controller
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:
v3:
* None
v2:
* Typo fix
---
---
Documentation/devicetree/bindings/dma/stm32-dma.txt | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/dma/stm32-dma.txt b/Documentation/devicetree/bindings/dma/stm32-dma.txt
index 4408af6..340c918 100644
--- a/Documentation/devicetree/bindings/dma/stm32-dma.txt
+++ b/Documentation/devicetree/bindings/dma/stm32-dma.txt
@@ -16,6 +16,9 @@ Optional properties:
- 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
+- st,dmamux: boolean; if defined, it indicates that the controller is behind a
+ DMA multiplexer. In that case, using dma instances doesn't work for DMA
+ clients. They have to use dma-router instances.
Example:
@@ -39,7 +42,7 @@ Example:
* 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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| From | Rob Herring <robh@kernel.org> |
|---|---|
| Date | 2017-07-10 06:00 +0200 |
| Subject | Re: [PATCH v3 3/5] dt-bindings: stm32-dma: Add property to handle STM32 DMAMUX |
| Message-ID | <u1y1z-8dG-3@gated-at.bofh.it> |
| In reply to | #1682385 |
On Thu, Jul 06, 2017 at 02:20:21PM +0200, Pierre-Yves MORDRET wrote: > This patch adds an optional property needed for STM32 DMA controller > 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: > v3: > * None > v2: > * Typo fix > --- > --- > Documentation/devicetree/bindings/dma/stm32-dma.txt | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) Acked-by: Rob Herring <robh@kernel.org>
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