linux-kernel - Re: [PATCH v4 18/18] dt-bindings: arm: msm: Convert kpss-gcc driver Documentation to yaml

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Date:   Mon, 21 Mar 2022 16:14:43 +0100
From:   Ansuel Smith <ansuelsmth@...il.com>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-clk@...r.kernel.org
Subject: Re: [PATCH v4 18/18] dt-bindings: arm: msm: Convert kpss-gcc driver
 Documentation to yaml

On Mon, Mar 21, 2022 at 04:41:37PM +0100, Krzysztof Kozlowski wrote:
> On 21/03/2022 15:48, Ansuel Smith wrote:
> > Convert kpss-gcc driver Documentation to yaml.
> > 
> > Signed-off-by: Ansuel Smith <ansuelsmth@...il.com>
> > ---
> >  .../bindings/arm/msm/qcom,kpss-gcc.txt        | 44 ------------
> >  .../bindings/arm/msm/qcom,kpss-gcc.yaml       | 68 +++++++++++++++++++
> >  2 files changed, 68 insertions(+), 44 deletions(-)
> >  delete mode 100644 Documentation/devicetree/bindings/arm/msm/qcom,kpss-gcc.txt
> >  create mode 100644 Documentation/devicetree/bindings/arm/msm/qcom,kpss-gcc.yaml
> > 
> > diff --git a/Documentation/devicetree/bindings/arm/msm/qcom,kpss-gcc.txt b/Documentation/devicetree/bindings/arm/msm/qcom,kpss-gcc.txt
> > deleted file mode 100644
> > index e628758950e1..000000000000
> > --- a/Documentation/devicetree/bindings/arm/msm/qcom,kpss-gcc.txt
> > +++ /dev/null
> > @@ -1,44 +0,0 @@
> > -Krait Processor Sub-system (KPSS) Global Clock Controller (GCC)
> > -
> > -PROPERTIES
> > -
> > -- compatible:
> > -	Usage: required
> > -	Value type: <string>
> > -	Definition: should be one of the following. The generic compatible
> > -			"qcom,kpss-gcc" should also be included.
> > -			"qcom,kpss-gcc-ipq8064", "qcom,kpss-gcc"
> > -			"qcom,kpss-gcc-apq8064", "qcom,kpss-gcc"
> > -			"qcom,kpss-gcc-msm8974", "qcom,kpss-gcc"
> > -			"qcom,kpss-gcc-msm8960", "qcom,kpss-gcc"
> > -
> > -- reg:
> > -	Usage: required
> > -	Value type: <prop-encoded-array>
> > -	Definition: base address and size of the register region
> > -
> > -- clocks:
> > -	Usage: required
> > -	Value type: <prop-encoded-array>
> > -	Definition: reference to the pll parents.
> > -
> > -- clock-names:
> > -	Usage: required
> > -	Value type: <stringlist>
> > -	Definition: must be "pll8_vote", "pxo".
> > -
> > -- clock-output-names:
> > -	Usage: required
> > -	Value type: <string>
> > -	Definition: Name of the output clock. Typically acpu_l2_aux indicating
> > -		    an L2 cache auxiliary clock.
> > -
> > -Example:
> > -
> > -	l2cc: clock-controller@...1000 {
> > -		compatible = "qcom,kpss-gcc-ipq8064", "qcom,kpss-gcc";
> > -		reg = <0x2011000 0x1000>;
> > -		clocks = <&gcc PLL8_VOTE>, <&gcc PXO_SRC>;
> > -		clock-names = "pll8_vote", "pxo";
> > -		clock-output-names = "acpu_l2_aux";
> > -	};
> > diff --git a/Documentation/devicetree/bindings/arm/msm/qcom,kpss-gcc.yaml b/Documentation/devicetree/bindings/arm/msm/qcom,kpss-gcc.yaml
> > new file mode 100644
> > index 000000000000..20ee182eb16f
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/arm/msm/qcom,kpss-gcc.yaml
> > @@ -0,0 +1,68 @@
> > +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/arm/msm/qcom,kpss-gcc.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Krait Processor Sub-system (KPSS) Global Clock Controller (GCC)
> > +
> > +maintainers:
> > +  - Ansuel Smith <ansuelsmth@...il.com>
> > +
> > +description: |
> > +  Krait Processor Sub-system (KPSS) Global Clock Controller (GCC). Used
> > +  to control L2 mux (in the current implementation).
> > +
> > +properties:
> > +  compatible:
> > +    items:
> > +      - enum:
> > +          - qcom,kpss-gcc-ipq8064
> > +          - qcom,kpss-gcc-apq8064
> > +          - qcom,kpss-gcc-msm8974
> > +          - qcom,kpss-gcc-msm8960
> > +      - const: qcom,kpss-gcc
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  clocks:
> > +    items:
> > +      - description: phandle to pll8_vote
> > +      - description: phandle to pxo_board
> > +
> > +  clock-names:
> > +    items:
> > +      - const: pll8_vote
> > +      - const: pxo
> > +
> > +  clock-output-names:
> > +    const: acpu_l2_aux
> > +
> > +  '#clock-cells':
> > +    const: 0
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - clocks
> > +  - clock-names
> > +  - clock-output-names
> > +  - '#clock-cells'
> 
> You add here a new required property, so this is not a pure conversion.
> Please explain in the commit msg why are you doing this. I asked about
> this in your previous patchset.
> 
> Best regards,
> Krzysztof

Sorry I probably missed it. Just to make sure you are referring to
#clock-cells?
Since this expose a clock, clock-cells is required. Should I put this in
a different commit? 

-- 
	Ansuel