linux-kernel - Re: [PATCH v4 1/2] dt-bindings: clock: Add QDU1000 and QRU1000 GCC clocks

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Date:   Sun, 20 Nov 2022 12:06:55 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Melody Olvera <quic_molvera@...cinc.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     Taniya Das <quic_tdas@...cinc.com>, linux-arm-msm@...r.kernel.org,
        linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 1/2] dt-bindings: clock: Add QDU1000 and QRU1000 GCC
 clocks

On 18/11/2022 19:18, Melody Olvera wrote:
> Add device tree bindings for global clock controller on QDU1000 and
> QRU1000 SoCs.
> 
> Signed-off-by: Melody Olvera <quic_molvera@...cinc.com>
> ---
>  .../bindings/clock/qcom,gcc-qdu1000.yaml      |  70 ++++++++
>  include/dt-bindings/clock/qcom,gcc-qdu1000.h  | 170 ++++++++++++++++++
>  2 files changed, 240 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/clock/qcom,gcc-qdu1000.yaml
>  create mode 100644 include/dt-bindings/clock/qcom,gcc-qdu1000.h
> 
> diff --git a/Documentation/devicetree/bindings/clock/qcom,gcc-qdu1000.yaml b/Documentation/devicetree/bindings/clock/qcom,gcc-qdu1000.yaml
> new file mode 100644
> index 000000000000..90935a6795ee
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/qcom,gcc-qdu1000.yaml
> @@ -0,0 +1,70 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/clock/qcom,gcc-qdu1000.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Qualcomm Global Clock & Reset Controller for QDU1000 and QRU1000
> +
> +allOf:
> +  - $ref: qcom,gcc.yaml#
> +
> +maintainers:
> +  - Melody Olvera <quic_molvera@...cinc.com>
> +
> +description: |
> +  Qualcomm global clock control module which supports the clocks, resets and
> +  power domains on QDU1000 and QRU1000

Keep the same style as existing files. They were cleaned up recently.

> +
> +  See also:
> +  - include/dt-bindings/clock/qcom,gcc-qdu1000.h

Keep the same style, so missing '::', drop '- '.

> +
> +properties:
> +  compatible:
> +    items:
> +      - const: qcom,gcc-qdu1000

SM8550 is coming with proper style of compatible, so let's do the same
also here: qcom,qdu1000-gcc
(and file name matching it)


> +      - const: syscon

I don't see usage of it as syscon. Which parts of GCC are needed for whom?

> +
> +  clocks:
> +    items:
> +      - description: Board XO source
> +      - description: Sleep clock source
> +      - description: PCIE 0 Pipe clock source
> +      - description: PCIE 0 Phy Auxiliary clock source
> +      - description: USB3 Phy wrapper pipe clock source
> +    minItems: 2

Same question as for SM8550 - why inputs are flexible? Either you have
these or you do not.

> +
> +  '#clock-cells':
> +    const: 1
> +
> +  '#reset-cells':
> +    const: 1
> +
> +  '#power-domain-cells':
> +    const: 1

Missing ref to gcc.yaml. Drop all properties provided by gcc.yaml.

> +
> +  reg:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - '#clock-cells'
> +  - '#reset-cells'

Drop these required by gcc.yaml.



Best regards,
Krzysztof