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Date: Fri, 10 Dec 2021 15:35:47 -0600
From: Rob Herring <robh@...nel.org>
To: David Heidelberg <david@...t.cz>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Andy Gross <agross@...nel.org>,
Bjorn Andersson <bjorn.andersson@...aro.org>,
Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
~okias/devicetree@...ts.sr.ht, linux-arm-msm@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4] dt-bindings: misc: fastrpc convert bindings to yaml
On Wed, Dec 08, 2021 at 11:15:08AM +0100, David Heidelberg wrote:
> Convert Qualcomm FastRPC bindings to yaml format, so that we could validate
> dt-entries correctly and any future additions can go into yaml format.
>
> Also:
> - simplify example
> - embrace compute-cb@ subnodes instead of just cb@
>
> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
> Signed-off-by: David Heidelberg <david@...t.cz>
> ---
> v4:
> - combined mine and Srinivas versions of the patch
> - previously found issues should be fixed
>
> .../devicetree/bindings/misc/qcom,fastrpc.txt | 78 ---------------
> .../bindings/misc/qcom,fastrpc.yaml | 94 +++++++++++++++++++
> 2 files changed, 94 insertions(+), 78 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/misc/qcom,fastrpc.txt
> create mode 100644 Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml
>
> diff --git a/Documentation/devicetree/bindings/misc/qcom,fastrpc.txt b/Documentation/devicetree/bindings/misc/qcom,fastrpc.txt
> deleted file mode 100644
> index 2a1827ab50d2..000000000000
> --- a/Documentation/devicetree/bindings/misc/qcom,fastrpc.txt
> +++ /dev/null
> @@ -1,78 +0,0 @@
> -Qualcomm Technologies, Inc. FastRPC Driver
> -
> -The FastRPC implements an IPC (Inter-Processor Communication)
> -mechanism that allows for clients to transparently make remote method
> -invocations across DSP and APPS boundaries. This enables developers
> -to offload tasks to the DSP and free up the application processor for
> -other tasks.
> -
> -- compatible:
> - Usage: required
> - Value type: <stringlist>
> - Definition: must be "qcom,fastrpc"
> -
> -- label
> - Usage: required
> - Value type: <string>
> - Definition: should specify the dsp domain name this fastrpc
> - corresponds to. must be one of this: "adsp", "mdsp", "sdsp", "cdsp"
> -
> -- #address-cells
> - Usage: required
> - Value type: <u32>
> - Definition: Must be 1
> -
> -- #size-cells
> - Usage: required
> - Value type: <u32>
> - Definition: Must be 0
> -
> -= COMPUTE BANKS
> -Each subnode of the Fastrpc represents compute context banks available
> -on the dsp.
> -- All Compute context banks MUST contain the following properties:
> -
> -- compatible:
> - Usage: required
> - Value type: <stringlist>
> - Definition: must be "qcom,fastrpc-compute-cb"
> -
> -- reg
> - Usage: required
> - Value type: <u32>
> - Definition: Context Bank ID.
> -
> -- qcom,nsessions:
> - Usage: Optional
> - Value type: <u32>
> - Defination: A value indicating how many sessions can share this
> - context bank. Defaults to 1 when this property
> - is not specified.
> -
> -Example:
> -
> -adsp-pil {
> - compatible = "qcom,msm8996-adsp-pil";
> - ...
> - smd-edge {
> - label = "lpass";
> - fastrpc {
> - compatible = "qcom,fastrpc";
> - qcom,smd-channels = "fastrpcsmd-apps-dsp";
> - label = "adsp";
> - #address-cells = <1>;
> - #size-cells = <0>;
> -
> - cb@1 {
> - compatible = "qcom,fastrpc-compute-cb";
> - reg = <1>;
> - };
> -
> - cb@2 {
> - compatible = "qcom,fastrpc-compute-cb";
> - reg = <2>;
> - };
> - ...
> - };
> - };
> -};
> diff --git a/Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml b/Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml
> new file mode 100644
> index 000000000000..f42ab208a7fc
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml
> @@ -0,0 +1,94 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: "http://devicetree.org/schemas/misc/qcom,fastrpc.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> +
> +title: Qualcomm FastRPC Driver
> +
> +maintainers:
> + - Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
> +
> +description: |
> + The FastRPC implements an IPC (Inter-Processor Communication)
> + mechanism that allows for clients to transparently make remote method
> + invocations across DSP and APPS boundaries. This enables developers
> + to offload tasks to the DSP and free up the application processor for
> + other tasks.
> +
> +properties:
> + compatible:
> + items:
> + - const: qcom,fastrpc
> +
> + label:
> + items:
> + enum:
> + - adsp
> + - mdsp
> + - sdsp
> + - cdsp
> +
> + '#address-cells':
> + const: 1
> +
> + '#size-cells':
> + const: 0
> +
> +patternProperties:
> + "(compute-)?cb@[0-9]$":
> + type: object
> +
> + description: >
> + Each subnode of the Fastrpc represents compute context banks available on the dsp.
> +
> + properties:
> + compatible:
> + items:
> + - const: qcom,fastrpc-compute-cb
> +
> + reg:
> + maxItems: 1
> +
> + qcom,nsession:
> + $ref: /schemas/types.yaml#/definitions/uint32
> + default: 1
> + description: >
> + A value indicating how many sessions can share this context bank.
> +
> + required:
> + - compatible
> + - reg
> +
> + additionalProperties: true
Why? What other properties are present.
> +
> +required:
> + - compatible
> + - label
> + - '#address-cells'
> + - '#size-cells'
> +
> +additionalProperties: true
Why? What other properties are present. This is generally never correct.
Rob
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