linux-kernel - Re: [PATCH v4 2/4] dt-bindings: arm: mediatek: Add new bindings of MediaTek frequency hopping

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Message-Id: <20221014204242.C7CAFC433B5@smtp.kernel.org>
Date:   Fri, 14 Oct 2022 13:42:40 -0700
From:   Stephen Boyd <sboyd@...nel.org>
To:     Johnson Wang <johnson.wang@...iatek.com>,
        angelogioacchino.delregno@...labora.com,
        krzysztof.kozlowski+dt@...aro.org, robh+dt@...nel.org
Cc:     linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        Project_Global_Chrome_Upstream_Group@...iatek.com,
        kuan-hsin.lee@...iatek.com, yu-chang.wang@...iatek.com,
        Johnson Wang <johnson.wang@...iatek.com>,
        Edward-JW Yang <edward-jw.yang@...iatek.com>
Subject: Re: [PATCH v4 2/4] dt-bindings: arm: mediatek: Add new bindings of MediaTek frequency hopping

Quoting Johnson Wang (2022-10-13 04:23:34)
> Add the new binding documentation for MediaTek frequency hopping
> and spread spectrum clocking control.
> 
> Co-developed-by: Edward-JW Yang <edward-jw.yang@...iatek.com>
> Signed-off-by: Edward-JW Yang <edward-jw.yang@...iatek.com>
> Signed-off-by: Johnson Wang <johnson.wang@...iatek.com>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> Reviewed-by: Rob Herring <robh@...nel.org>
> ---
>  .../arm/mediatek/mediatek,mt8186-fhctl.yaml   | 53 +++++++++++++++++++
>  1 file changed, 53 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/arm/mediatek/mediatek,mt8186-fhctl.yaml
> 
> diff --git a/Documentation/devicetree/bindings/arm/mediatek/mediatek,mt8186-fhctl.yaml b/Documentation/devicetree/bindings/arm/mediatek/mediatek,mt8186-fhctl.yaml
> new file mode 100644
> index 000000000000..59111946966c
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/arm/mediatek/mediatek,mt8186-fhctl.yaml
> @@ -0,0 +1,53 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/arm/mediatek/mediatek,mt8186-fhctl.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: MediaTek frequency hopping and spread spectrum clocking control

The driver patch is in drivers/clk so why not put the binding in
bindings/clock as well?

> +
> +maintainers:
> +  - Edward-JW Yang <edward-jw.yang@...iatek.com>
> +
[...]
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/mt8186-clk.h>
> +    fhctl: fhctl@...0ce00 {

Is it a clock-controller? 'fhctl' isn't a generic node name.

> +        compatible = "mediatek,mt8186-fhctl";
> +        reg = <0x1000ce00 0x200>;
> +        clocks = <&apmixedsys CLK_APMIXED_MSDCPLL>;
> +        mediatek,hopping-ssc-percent = <3>;