On Fri, Feb 12, 2021 at 03:46:08PM +0000, Sudeep Holla wrote: > Since the FF-A v1.0 specification doesn't list the UUID of all the > partitions in the discovery API, we need to specify the UUID of the > partitions that need to be accessed by drivers within the kernel. > > This binding to provide the list of partitions that kernel drivers > may need to access. > > Signed-off-by: Sudeep Holla <sudeep.holla@xxxxxxx> > --- > .../devicetree/bindings/arm/arm,ffa.yaml | 58 +++++++++++++++++++ > 1 file changed, 58 insertions(+) > create mode 100644 Documentation/devicetree/bindings/arm/arm,ffa.yaml > > Hi Rob, > > Sorry to send the same version again just to keep the driver review progress. > I am still exploring on how to add "format: uuid" support in the dt-schemas. > I am seeing errors as format is used in some of the audio/video DT bindings. > I get errors for all those files, may be I need to use $format, initial > trial to do that also failed. Other bindings shouldn't affect you. The meta-schema and maybe the fixups are probably the issue. It's something I need to fix. > Regarding other comment, I had replied earlier[1] as why we need to keep > separate DT nodes for each partitions. That's fine. It's the other users like TF-A that I'm now more concerned about... > [1] https://lore.kernel.org/linux-arm-kernel/20210113100011.bnn75jogx22cgkk4@bogus/ > > Regards, > Sudeep > > > diff --git a/Documentation/devicetree/bindings/arm/arm,ffa.yaml b/Documentation/devicetree/bindings/arm/arm,ffa.yaml > new file mode 100644 > index 000000000000..a014a5801c34 > --- /dev/null > +++ b/Documentation/devicetree/bindings/arm/arm,ffa.yaml > @@ -0,0 +1,58 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/arm/arm,ffa.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Arm Firmware Framework for Arm v8-A (in-kernel users) > + > +maintainers: > + - Sudeep Holla <sudeep.holla@xxxxxxx> > + > +description: | > + Firmware frameworks implementing partition according to the FF-A > + specification defined by ARM document number ARM DEN 0077A ("Arm Firmware > + Framework for Arm v8-A") [0], providing services to be used by other > + partitions. > + > + [0] https://developer.arm.com/docs/den0077/latest > + > +properties: > + $nodename: > + const: ffa > + > + compatible: > + oneOf: > + - const: arm,ffa-1.0 > + > +patternProperties: > + "^ffa_partition[0-9]+$": '^ffa-partition-[0-9a-f]+$' > + type: object > + description: One or more child nodes, each describing an FFA partition. > + properties: > + $nodename: > + const: ffa_partition > + > + compatible: > + oneOf: Don't need oneOf. > + - const: arm,ffa-1.0-partition > + > + uuid: > + $ref: '/schemas/types.yaml#definitions/string' > + description: | > + The 128-bit UUID [2] of the service implemented by this partition. > + > + [2] https://tools.ietf.org/html/rfc4122 > + > +additionalProperties: false > + > +examples: > + - | > + ffa { > + compatible = "arm,ffa-1.0"; > + > + ffa_partition0 { > + compatible = "arm,ffa-1.0-partition"; > + uuid = "12345678-9abc-def0-1234-56789abcdef0"; > + }; > + }; > -- > 2.25.1 >
