From: Rob Herring <robh@kernel.org>
To: Sudeep Holla <sudeep.holla@arm.com>
Cc: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
Trilok Soni <tsoni@codeaurora.org>,
arve@android.com, Andrew Walbran <qwandor@google.com>,
David Hartley <dhh@qti.qualcomm.com>,
Achin Gupta <Achin.Gupta@arm.com>,
Jens Wiklander <jens.wiklander@linaro.org>,
Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>,
Marc Bonnici <marc.bonnici@arm.com>
Subject: Re: [PATCH v4 1/7] dt-bindings: Arm: Add Firmware Framework for Armv8-A (FF-A) binding
Date: Fri, 5 Mar 2021 14:38:49 -0600 [thread overview]
Message-ID: <20210305203849.GA585154@robh.at.kernel.org> (raw)
In-Reply-To: <20210212154614.38604-2-sudeep.holla@arm.com>
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@arm.com>
> ---
> .../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@arm.com>
> +
> +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
>
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next prev parent reply other threads:[~2021-03-05 20:41 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-12 15:46 [PATCH v4 0/7] firmware: Add initial support for Arm FF-A Sudeep Holla
2021-02-12 15:46 ` [PATCH v4 1/7] dt-bindings: Arm: Add Firmware Framework for Armv8-A (FF-A) binding Sudeep Holla
2021-03-05 20:38 ` Rob Herring [this message]
2021-02-12 15:46 ` [PATCH v4 2/7] arm64: smccc: Add support for SMCCCv1.2 input/output registers Sudeep Holla
2021-03-17 7:17 ` Jens Wiklander
2021-03-23 9:56 ` Sudeep Holla
2021-02-12 15:46 ` [PATCH v4 3/7] firmware: arm_ffa: Add initial FFA bus support for device enumeration Sudeep Holla
2021-02-12 15:46 ` [PATCH v4 4/7] firmware: arm_ffa: Add initial Arm FFA driver support Sudeep Holla
2021-03-19 7:25 ` Jens Wiklander
2021-03-23 9:53 ` Sudeep Holla
2021-02-12 15:46 ` [PATCH v4 5/7] firmware: arm_ffa: Add support for SMCCC as transport to FFA driver Sudeep Holla
2021-03-19 7:02 ` Jens Wiklander
2021-02-12 15:46 ` [PATCH v4 6/7] firmware: arm_ffa: Setup in-kernel users of FFA partitions Sudeep Holla
2021-03-18 13:08 ` Jens Wiklander
2021-02-12 15:46 ` [PATCH v4 7/7] firmware: arm_ffa: Add support for MEM_* interfaces Sudeep Holla
2021-03-18 14:02 ` Jens Wiklander
2021-03-16 14:34 ` [PATCH v4 0/7] firmware: Add initial support for Arm FF-A Sudeep Holla
2021-03-18 14:09 ` Jens Wiklander
2021-03-19 7:56 ` Jens Wiklander
2021-03-23 9:50 ` Sudeep Holla
2021-03-23 9:49 ` Sudeep Holla
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