On Fri, Nov 1, 2019 at 2:31 PM Stefano Stabellini via System-dt system-dt@lists.openampproject.org wrote:
On Thu, 31 Oct 2019, Nathalie Chan King Choy via System-dt wrote:
Hi all,
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The notes from today's call can be found on the OpenAMP wiki at this link: https://github.com/OpenAMP/open-amp/wiki/System-DT-Meeting-Notes-2019#201910...
Hi Nathalie,
Thank you for the notes. I'll take this opportunity to test the new mailing list as well ;-)
In today's call, Stefano presented from the example System DTS file that is attached. It is an early draft based on discussions between Stefano & Grant after Linaro Connect SAN19, related to getting a system DT to work in the default case, without requiring pruning. (I wasn't sure how to allow .dts files in the mailing list content filter, so I changed the extension to .txt)
Action items:
- All: if you can think of simple solution to interrupt-map info duplication, let Stefano know & he will try to add to the example.
- Stefano: Remove ranges from amba_rpu
- Stefano: In next couple weeks, look at GPIO controller extensions & write in detail & send to list so we can discuss.
I am trying to look for the interrupt-related GPIO extensions, and the only one I could find is: socionext,interrupt-ranges from Documentation/devicetree/bindings/gpio/gpio-uniphier.txt:
- socionext,interrupt-ranges: Specifies an interrupt number mapping between this GPIO controller and its interrupt parent, in the form of arbitrary number of <child-interrupt-base parent-interrupt-base length> triplets.
No, there's numerous examples that *should* have used interrupt-map, but invented their own thing.
which is very similar to what we need here, but it looks like a socionext specific property while I seem to recall that Rob said that it was made "standard".
Rob, is this the property you had in mind? Or is there another one?
No. It's '*-map-pass-thru' and in the DT spec. Here's the commit adding it[1]. The motivation for this was GPIO, but the spec was written generically.
Rob
[1] https://github.com/devicetree-org/devicetree-specification/commit/32c96cd64d...