linux-kernel - Re: [PATCH 1/5] dt-bindings: clock: Add YAML schemas for LPASSCC and reset on SC8280XP

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Message-ID: <ZGsmCmEdoWIkcVDd@hovoldconsulting.com>
Date:   Mon, 22 May 2023 10:21:30 +0200
From:   Johan Hovold <johan@...nel.org>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc:     andersson@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, johan+linaro@...nel.org,
        agross@...nel.org, konrad.dybcio@...aro.org,
        mturquette@...libre.com, sboyd@...nel.org, conor+dt@...nel.org,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/5] dt-bindings: clock: Add YAML schemas for LPASSCC and
 reset on SC8280XP

On Thu, May 18, 2023 at 12:37:56PM +0100, Srinivas Kandagatla wrote:
> The LPASS(Low Power Audio Subsystem) clock provider provides reset

Missing space after LPASS acronym.

s/provider/controller/?

> controller support when is driven by the Q6DSP.

s/controller//?

"when is driven by": sounds like there are some words missing here.

> This patch adds support for those resets and adds IDs for clients

There is never any need to say "this patch" in a commit message. Just say

	Add support for...

> to request the reset.
> 
> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
> ---
>  .../bindings/clock/qcom,sc8280xp-lpasscc.yaml | 57 +++++++++++++++++++
>  .../dt-bindings/clock/qcom,lpasscc-sc8280xp.h | 12 ++++
>  2 files changed, 69 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/clock/qcom,sc8280xp-lpasscc.yaml
>  create mode 100644 include/dt-bindings/clock/qcom,lpasscc-sc8280xp.h
> 
> diff --git a/Documentation/devicetree/bindings/clock/qcom,sc8280xp-lpasscc.yaml b/Documentation/devicetree/bindings/clock/qcom,sc8280xp-lpasscc.yaml
> new file mode 100644
> index 000000000000..7c30614a0af9
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/qcom,sc8280xp-lpasscc.yaml
> @@ -0,0 +1,57 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/clock/qcom,sc8280xp-lpasscc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Qualcomm LPASS Core & Audio Clock Controller on SC8280XP
> +
> +maintainers:
> +  - Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
> +
> +description: |
> +  Qualcomm LPASS core and audio clock control module provides the clocks,
> +  reset and power domains on SC8280XP.

"power domains"? copy-paste error?

> +
> +  See also::
> +    include/dt-bindings/clock/qcom,lpasscc-sc8280xp.h
> +
> +properties:
> +  reg: true
> +
> +  compatible:
> +    enum:
> +      - qcom,sc8280xp-lpasscc
> +
> +  '#reset-cells':
> +    const: 1
> +
> +  '#clock-cells':
> +    const: 1

Move above #reset-cells for some sorting of related attributes. Same
below (in two places).

> +
> +  qcom,adsp-pil-mode:
> +    description:
> +      Indicates if the LPASS would be brought out of reset using
> +      peripheral loader.
> +    type: boolean

Move above the provider cells properties?

> +
> +required:
> +  - compatible
> +  - reg
> +  - qcom,adsp-pil-mode

If this boolean property is always needed, shouldn't that simply be
handled by the driver based on the compatible?

> +  - '#reset-cells'
> +  - '#clock-cells'
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/qcom,lpasscc-sc8280xp.h>
> +    lpasscc: clock-controller@...0000 {
> +      compatible = "qcom,sc8280xp-lpasscc";

binding examples use 4-space indentation.

> +      reg = <0x033e0000 0x12000>;

Does not match the node unit address.

> +      #reset-cells = <1>;
> +      #clock-cells = <1>;
> +      qcom,adsp-pil-mode;
> +    };
> +...
> diff --git a/include/dt-bindings/clock/qcom,lpasscc-sc8280xp.h b/include/dt-bindings/clock/qcom,lpasscc-sc8280xp.h
> new file mode 100644
> index 000000000000..df800ea2741c
> --- /dev/null
> +++ b/include/dt-bindings/clock/qcom,lpasscc-sc8280xp.h
> @@ -0,0 +1,12 @@
> +/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
> +/*
> + * Copyright (c) 2023, Linaro Ltd.
> + */
> +
> +#ifndef _DT_BINDINGS_CLK_QCOM_LPASSCC_SC8280XP_H
> +#define _DT_BINDINGS_CLK_QCOM_LPASSCC_SC8280XP_H
> +
> +/* LPASS TCSR */
> +#define LPASS_AUDIO_SWR_TX_CGCR				0
> +
> +#endif