linux-kernel - Re: [PATCH v2 1/4] dt-bindings: hwlock: qcom: Migrate binding to YAML

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Date:   Tue, 21 Jul 2020 09:13:22 -0600
From:   Rob Herring <robh+dt@...nel.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Andy Gross <agross@...nel.org>, Ohad Ben-Cohen <ohad@...ery.com>,
        Baolin Wang <baolin.wang7@...il.com>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        "open list:REMOTE PROCESSOR (REMOTEPROC) SUBSYSTEM" 
        <linux-remoteproc@...r.kernel.org>, devicetree@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Vinod Koul <vkoul@...nel.org>
Subject: Re: [PATCH v2 1/4] dt-bindings: hwlock: qcom: Migrate binding to YAML

On Mon, Jun 22, 2020 at 1:59 AM Bjorn Andersson
<bjorn.andersson@...aro.org> wrote:
>
> Migrate the Qualcomm TCSR mutex binding to YAML to allow validation.
>
> Reviewed-by: Vinod Koul <vkoul@...nel.org>
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> ---
>
> Changes since v1:
> - Actually remove the old binding doc
>
>  .../bindings/hwlock/qcom-hwspinlock.txt       | 39 --------------
>  .../bindings/hwlock/qcom-hwspinlock.yaml      | 51 +++++++++++++++++++
>  2 files changed, 51 insertions(+), 39 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.txt
>  create mode 100644 Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.yaml

[...]

> diff --git a/Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.yaml b/Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.yaml
> new file mode 100644
> index 000000000000..71e63b52edd5
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.yaml
> @@ -0,0 +1,51 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/hwlock/qcom-hwspinlock.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Qualcomm Hardware Mutex Block
> +
> +maintainers:
> +  - Bjorn Andersson <bjorn.andersson@...aro.org>
> +
> +description:
> +  The hardware block provides mutexes utilized between different processors on
> +  the SoC as part of the communication protocol used by these processors.
> +
> +properties:
> +  compatible:
> +    enum:
> +      - qcom,sfpb-mutex
> +      - qcom,tcsr-mutex
> +
> +  '#hwlock-cells':
> +    const: 1
> +
> +  syscon:
> +    $ref: "/schemas/types.yaml#/definitions/phandle-array"
> +    description:
> +      Should be a triple of phandle referencing the TCSR mutex syscon, offset
> +      of first mutex within the syscon and stride between each mutex.
> +
> +required:
> +  - compatible
> +  - '#hwlock-cells'
> +  - syscon
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +        tcsr_mutex_block: syscon@...84000 {
> +                compatible = "syscon";

'syscon' alone now generates warnings. Can you drop this node or add a
specific compatible.

> +                reg = <0xfd484000 0x2000>;
> +        };
> +
> +        hwlock {
> +                compatible = "qcom,tcsr-mutex";
> +                syscon = <&tcsr_mutex_block 0 0x80>;
> +
> +                #hwlock-cells = <1>;
> +        };
> +...
> --
> 2.26.2
>