Messages in this thread | | | Date | Thu, 29 Mar 2018 14:34:00 +0100 | From | Alan Cox <> | Subject | Re: [PATCH 1/3] serial: 8250_early: Add earlycon support for AMD Carrizo / Stoneyridge |
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On Mon, 26 Mar 2018 20:56:45 -0600 Aaron Durbin <adurbin@chromium.org> wrote:
> On Mon, Mar 26, 2018 at 12:24 PM, Alan Cox <gnomes@lxorguk.ukuu.org.uk> wrote: > >> Sadly, this situation > >> is not unique to this hardware. There is hardware all over that does > >> not meet the current assumptions being made in the early uart drivers > >> within the kernel. > > > > Is there any fundamental reason you can't just embed dt entries in the > > ACPI table to describe the other features you need. I appreciate it > > doesn't solve the generic PC case but it ought to help for anything where > > the firmware cares about Linux ? > > What's the method for doing that? Using _DSD methods? Or have a > pointer to examples? Sorry, I haven't spelunked into the current state > of bridging ACPI and devicetree in a while.
ACPI 5.1 adds an _DSD method UUID for device properties.
The kernel device_property_* interface will pick them up just as if they came from DT tables etc.
Alan
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