Re: [PATCH 06/15] PCI/ACPI: Link host bridge to its ACPI fw node

[Dan Williams]

Rafael J. Wysocki wrote:
> On Thu, Sep 8, 2022 at 8:05 AM Dan Williams <dan.j.williams@xxxxxxxxx> wrote:
> >
> > Robert Richter wrote:
> > > A lookup of a host bridge's corresponding acpi device (struct
> > > acpi_device) is not possible, for example:
> > >
> > >       adev = ACPI_COMPANION(&host_bridge->dev);
> > >
> > > This could be useful to find a host bridge's fwnode handle and to
> > > determine and call additional host bridge ACPI parameters and methods
> > > such as HID/CID or _UID.
> >
> > When is this explicitly needed. "Could be useful" is interesting, but it
> > needs to have a practical need.
> 
> It is needed and it is present on x86 AFAICS (see my last reply in this thread).
> 
> This seems to be addressing an ARM64-specific issue.
> 

Ah, ok, thanks for pointing that out.