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 | 57 +++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 Documentation/devicetree/bindings/arm/arm,ffa.yaml diff --git a/Documentation/devicetree/bindings/arm/arm,ffa.yaml b/Documentation/devicetree/bindings/arm/arm,ffa.yaml new file mode 100644 index 000000000000..42ed33464ba7 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/arm,ffa.yaml @@ -0,0 +1,57 @@ +# 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: + $nodename: + const: ffa + + compatible: + oneOf: + - const: arm,ffa-1.0 + +patternProperties: + "^ffa-partition-[0-9]+$": + type: object + description: One or more child nodes, each describing an FFA partition. + properties: + $nodename: + const: ffa_partition + + compatible: + 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-partition-0 { + compatible = "arm,ffa-1.0-partition"; + uuid = "12345678-9abc-def0-1234-56789abcdef0"; + }; + }; -- 2.25.1
