Messages in this thread | | | From | "Rafael J. Wysocki" <> | Subject | Re: [PATCH 1/2] ASoC: rt5677: Add ACPI device probing | Date | Thu, 27 Nov 2014 00:09:55 +0100 |
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On Wednesday, November 26, 2014 11:17:16 AM Mark Brown wrote: > > --4mL5lf+nIvB09VHj > Content-Type: text/plain; charset=us-ascii > Content-Disposition: inline > > On Tue, Nov 25, 2014 at 05:48:24PM -0800, Darren Hart wrote: > > On 11/25/14 10:43, Mark Brown wrote: > > > > Link from where - do we want to talk to the ACPI/UEFI forum and > > > figure out some kind of fast track process for them to add an "it's > > > already covered by DT, see here" entry to their database for > > > example? We also ought to work out how to make sure ACPI IDs are > > > registered there as well, should be possible to have something > > > simple as part of that. > > > As to registering ACPI IDs, I believe this is the right link: > > http://www.uefi.org/PNP_ACPI_Registry > > No, those are vendors as far as I can tell. I mean identifiers for > specific devices - it appears to be common for for example Intel to > allocate identifiers for devices they don't produce, I'd expect there to > be some effort to keep track of that especially given that _DSD > properties may well end up being specific to the identifier used to > register in cases of parallel evolution.
The vendor (or more precisely the owner of the initial 3 or 4 letter code) is supposed to do that. I'm not aware of any common registry of those IDs for all vendors.
> > Or did you mean a HID/CID<->DSD mapping? > > I don't really know what that is, sorry.
The device ID is supposed to determine the way all of the ACPI objects for that device will work, including what is returned by _DSD. Pretty much in analogy with PCI device IDs.
-- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center.
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