linux-kernel - Re: [PATCH v4 3/6] dt-bindings: remoteproc: Add common TI SCI rproc bindings

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Date:   Tue, 21 Jul 2020 09:53:58 -0600
From:   Rob Herring <robh+dt@...nel.org>
To:     Suman Anna <s-anna@...com>, Lokesh Vutla <lokeshvutla@...com>
Cc:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        "open list:REMOTE PROCESSOR (REMOTEPROC) SUBSYSTEM" 
        <linux-remoteproc@...r.kernel.org>, devicetree@...r.kernel.org,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 3/6] dt-bindings: remoteproc: Add common TI SCI rproc bindings

On Fri, Jul 17, 2020 at 5:48 PM Suman Anna <s-anna@...com> wrote:
>
> Add a bindings document that lists the common TI SCI properties
> used by the K3 R5F and DSP remoteproc devices.
>
> Signed-off-by: Suman Anna <s-anna@...com>
> ---
> v4: Addressed both of Rob's review comments on ti,sci-proc-ids property
> v3: https://patchwork.kernel.org/patch/11602317/
>
>  .../bindings/remoteproc/ti,k3-sci-proc.yaml   | 48 +++++++++++++++++++
>  1 file changed, 48 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/remoteproc/ti,k3-sci-proc.yaml
>
> diff --git a/Documentation/devicetree/bindings/remoteproc/ti,k3-sci-proc.yaml b/Documentation/devicetree/bindings/remoteproc/ti,k3-sci-proc.yaml
> new file mode 100644
> index 000000000000..0dca2ffdbc48
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/remoteproc/ti,k3-sci-proc.yaml
> @@ -0,0 +1,48 @@
> +# SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/remoteproc/ti,k3-sci-proc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Common TI K3 remote processor device bindings
> +
> +maintainers:
> +  - Suman Anna <s-anna@...com>
> +
> +description: |
> +  The TI K3 family of SoCs usually have one or more remote processor sub-systems
> +  like the dual-core R5F sub-system or a C66x or C71x DSP processor subsystem.
> +  The device management of these remote processors is managed by a dedicated
> +  System Processor, and the communication with that processor is managed through
> +  the TI-SCI protocol.
> +
> +  Each remote processor device node should define a common set of properties
> +  that allows the System Processor firmware to perform the device management
> +  such as powering the IPs, asserting/deasserting the resets for each of these
> +  processors.
> +
> +properties:
> +  ti,sci:
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +    description:
> +      Should be a phandle to the TI-SCI System Controller node
> +
> +  ti,sci-dev-id:
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    description: |
> +      Should contain the TI-SCI device id corresponding to the remote processor
> +      core. Please refer to the corresponding System Controller documentation
> +      for valid values.

These also apply on Lokesh's series converting ti,sci-int[ra]
bindings. Please rework to use for both.

> +
> +  ti,sci-proc-ids:
> +    description: Should contain a single tuple of <proc_id host_id>.
> +    $ref: /schemas/types.yaml#/definitions/uint32-array
> +    items:
> +      - description: TI-SCI processor id for the remote processor device
> +      - description: TI-SCI host id to which processor control ownership
> +                     should be transferred to
> +
> +required:
> +  - ti,sci
> +  - ti,sci-dev-id
> +  - ti,sci-proc-ids
> --
> 2.26.0
>