Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1631324
| From | Pierre Yves MORDRET <pierre-yves.mordret@st.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH 3/5] dt-bindings: stm32-dma: Add property to handle STM32 DMAMUX |
| Date | 2017-04-26 11:50 +0200 |
| Message-ID | <tArKc-tv-81@gated-at.bofh.it> (permalink) |
| References | <tkyZj-1HR-3@gated-at.bofh.it> <tkyZl-1HR-27@gated-at.bofh.it> <tndlD-2eT-1@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 03/20/2017 10:37 PM, Rob Herring wrote: > On Mon, Mar 13, 2017 at 03:15:59PM +0100, M'boumba Cedric Madianga 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> >> --- >> Documentation/devicetree/bindings/dma/stm32-dma.txt | 3 +++ >> 1 file changed, 3 insertions(+) >> >> diff --git a/Documentation/devicetree/bindings/dma/stm32-dma.txt b/Documentation/devicetree/bindings/dma/stm32-dma.txt >> index 4408af6..7b5e91a 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. > > This should not be needed for the same reason we don't need anything > like this for chained interrupt controllers. > > Also, the compatible string should be specific enough to provide this > information. > > Rob I don't understand what you're meant here. Our DMAs can work with or without DMAMUX driver. Driver uses this binding to use it or not. Py > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel > > >
Back to linux.kernel | Previous | Next | Find similar | Unroll thread
Re: [PATCH 3/5] dt-bindings: stm32-dma: Add property to handle STM32 DMAMUX Pierre Yves MORDRET <pierre-yves.mordret@st.com> - 2017-04-26 11:50 +0200
csiph-web