Re: [RFC] powerpc/devtree: Parse new DRC mem/cpu/dev device tree elements

[Stewart Smith <stewart@linux.vnet.ibm.com>]

Michael Bringmann <mwb@linux.vnet.ibm.com> writes:
> Summary: The following properties: ibm,drc-indexes, ibm,drc-names,=20
> ibm,drc-types and ibm,drc-power-domains will be combined and condensed=20
> into the single property, ibm,drc-info.
>
> The ibm,dynamic-memory property will be condensed into a new version,=20
> ibm,dynamic-memory-v2.
>
> Note: "[PATCH] powerpc/devtree: Parse new DRC mem/cpu/dev device tree=20
> elements" is withdrawn at this time.
>
>
> Several properties in the DRC device tree format are replaced by
> more compact representations to allow, for example, for the encoding
> of vast amounts of memory, and or reduced duplication of information
> in related data structures.
>
> "ibm,drc-info": This property, when present, replaces the following
> four properties: =E2=80=9Cibm,drc-indexes=E2=80=9D, =E2=80=9Cibm,drc-name=
s=E2=80=9D, =E2=80=9Cibm,drc-types=E2=80=9D
> and =E2=80=9Cibm,drc-power-domains=E2=80=9D.  This property is defined fo=
r all
> dynamically reconfigurable platform nodes.  The "ibm,drc-info" elements
> are intended to provide a more compact representation, and reduce some
> search overhead.
>
> "ibm,dynamic-memory-v2": This property replaces the "ibm,dynamic-memory"
> node representation within the "ibm,dynamic-reconfiguration-memory"
> property.  This element format is intended to provide a more compact
> representation of memory, especially, for systems with massive amounts
> of RAM.
>
> "ibm,architecture.vec": Bit flags are added to this data structure
> by the front end processor to inform the kernel as to whether to expect
> the changes to one or both of the device tree structures "ibm,drc-info"
> and "ibm,dynamic-memory-v2".
>
> The new element structures, "ibm,dynamic-memory-v2" and "ibm,drc-info",
> should completely replace the previously used structures at execution.
>
> Signed-off-by: Michael Bringmann <mwb@linux.vnet.ibm.com>
> ---

Documentation/devicetree/bindings ? or link to PAPR where it's specified?

--=20
Stewart Smith
OPAL Architect, IBM.