linux-kernel - Re: [PATCH] dt-bindings: remoteproc: sti: convert st-rproc into dt-schema

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Message-ID: <c44dbd68-337a-56fb-64f7-bb39abc4f97f@linaro.org>
Date:   Sun, 12 Feb 2023 17:08:35 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Alain Volmat <avolmat@...com>,
        Bjorn Andersson <andersson@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Patrice Chotard <patrice.chotard@...s.st.com>
Cc:     linux-remoteproc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: remoteproc: sti: convert st-rproc into
 dt-schema

On 11/02/2023 21:47, Alain Volmat wrote:
> Convert the st-rproc.txt binding into dt-schema YAML st,sti-rproc.yaml
> 
> Signed-off-by: Alain Volmat <avolmat@...com>
> ---
>  .../bindings/remoteproc/st,sti-rproc.yaml     | 101 ++++++++++++++++++
>  .../bindings/remoteproc/st-rproc.txt          |  41 -------
>  2 files changed, 101 insertions(+), 41 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/remoteproc/st,sti-rproc.yaml
>  delete mode 100644 Documentation/devicetree/bindings/remoteproc/st-rproc.txt
> 
> diff --git a/Documentation/devicetree/bindings/remoteproc/st,sti-rproc.yaml b/Documentation/devicetree/bindings/remoteproc/st,sti-rproc.yaml
> new file mode 100644
> index 000000000000..b9d84dfbcb58
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/remoteproc/st,sti-rproc.yaml
> @@ -0,0 +1,101 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: "http://devicetree.org/schemas/remoteproc/st,sti-rproc.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"

Drop quotes from both.

> +
> +title: STMicroelectronics STi remote processor controller
> +
> +description:
> +  This binding provides support for adjunct processors found on ST SoCs.

Drop entire sentence and describe hardware, not binding. This is
binding, so no need to say it is binding.

> +
> +  Co-processors can be controlled from the bootloader or the primary OS. If
> +  the bootloader starts a co-processor, the primary OS must detect its state
> +  and act accordingly.
> +
> +maintainers:
> +  - Patrice Chotard <patrice.chotard@...s.st.com>
> +
> +properties:
> +  compatible:
> +    enum:
> +      - st,st231-rproc
> +      - st,st40-rproc
> +
> +  memory-region:
> +    description:
> +      List of phandles to the reserved memory regions associated with the
> +      remoteproc device. This is variable and describes the memories shared with
> +      the remote processor (e.g. remoteproc firmware and carveouts, rpmsg
> +      vrings, ...).

maxItems

> +      (see ../reserved-memory/reserved-memory.txt)

Drop last line.

> +
> +  resets:
> +    maxItems: 1
> +
> +  reset-names:
> +    maxItems: 1

You need to list items.

> +
> +  st,syscfg:
> +    description:
> +      System configuration register which holds the boot vector for the co-processor
> +    $ref: "/schemas/types.yaml#/definitions/phandle-array"

Drop quotes.

> +    items:
> +      - items:
> +          - description: Phandle of syscon block
> +          - description: Boot vector register offset
> +
> +  clocks:
> +    maxItems: 1
> +
> +  clock-frequency:
> +    description:
> +      Frequency of the processing clock of the remote processor
> +    $ref: "/schemas/types.yaml#/definitions/uint32"

Drop ref, not needed, it comes from dtschema.

> +
> +  "#mbox-cells":
> +    const: 1
> +
> +  mboxes:
> +    maxItems: 4
> +
> +  mbox-names:
> +    items:
> +      - const: vq0_rx
> +      - const: vq0_tx
> +      - const: vq1_rx
> +      - const: vq1_tx
> +
> +required:
> +  - compatible
> +  - memory-region
> +  - resets
> +  - reset-names
> +  - st,syscfg
> +  - clocks
> +  - clock-frequency
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/clock/stih407-clks.h>
> +    #include <dt-bindings/reset/stih407-resets.h>
> +    audio_reserved: rproc@...00000 {
> +      compatible = "shared-dma-pool";
> +        reg = <0x42000000 0x01000000>;
> +        no-map;
> +    };
> +
> +    st231-audio {

Generic node names, so maybe "remoteproc"

> +      compatible = "st,st231-rproc";
> +      memory-region = <&audio_reserved>;
> +      resets = <&softreset STIH407_ST231_AUD_SOFTRESET>;
> +      reset-names = "sw_reset";
> +      clocks = <&clk_s_c0_flexgen CLK_ST231_AUD_0>;
> +      clock-frequency = <600000000>;
> +      st,syscfg	= <&syscfg_core 0x228>;

Correct indentation issue.

> +    };


Best regards,
Krzysztof