linux-kernel - Re: [PATCH 1/9] dt-bindings: clock: Add SM8550 GCC clock bindings

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Date:   Thu, 17 Nov 2022 11:40:53 +0200
From:   Abel Vesa <abel.vesa@...aro.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Mike Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        devicetree@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-clk@...r.kernel.org
Subject: Re: [PATCH 1/9] dt-bindings: clock: Add SM8550 GCC clock bindings

On 22-11-17 10:08:05, Krzysztof Kozlowski wrote:
> On 16/11/2022 11:47, Abel Vesa wrote:
> > Add device tree bindings for global clock controller on SM8550 SoCs.
> 
> Subject: drop second, redundant "bindings".

Sure thing, will drop.

> 
> > 
> > Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
> > ---
> >  .../bindings/clock/qcom,gcc-sm8550.yaml       |  88 +++++++
> >  include/dt-bindings/clock/qcom,gcc-sm8550.h   | 231 ++++++++++++++++++
> >  2 files changed, 319 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/clock/qcom,gcc-sm8550.yaml
> >  create mode 100644 include/dt-bindings/clock/qcom,gcc-sm8550.h
> > 
> > diff --git a/Documentation/devicetree/bindings/clock/qcom,gcc-sm8550.yaml b/Documentation/devicetree/bindings/clock/qcom,gcc-sm8550.yaml
> > new file mode 100644
> > index 000000000000..a2468167c8ab
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/clock/qcom,gcc-sm8550.yaml
> > @@ -0,0 +1,88 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/clock/qcom,gcc-sm8550.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Qualcomm Global Clock & Reset Controller Binding for SM8550
> 
> You need to base on recent bindings. See commit ece3c3198182a1.
> 

Yep, will do.

> > +
> > +maintainers:
> > +  - Bjorn Andersson <andersson@...nel.org>
> > +
> > +description: |
> > +  Qualcomm global clock control module which supports the clocks, resets and
> > +  power domains on SM8550
> 
> Ditto
> 
> > +
> > +  See also:
> > +  - dt-bindings/clock/qcom,gcc-sm8550.h
> 
> Ditto
> 
> > +
> > +properties:
> > +  compatible:
> > +    const: qcom,sm8550-gcc
> > +
> > +  clocks:
> > +    items:
> > +      - description: Board XO source
> > +      - description: Sleep clock source
> > +      - description: PCIE 0 Pipe clock source (Optional clock)
> 
> Drop "(Optional clock)"

Sure, will drop. I based this on SM8450, but maybe that also needs an
update.

> 
> > +      - description: PCIE 1 Pipe clock source (Optional clock)
> > +      - description: PCIE 1 Phy Auxiliary clock source (Optional clock)
> > +      - description: UFS Phy Rx symbol 0 clock source (Optional clock)
> > +      - description: UFS Phy Rx symbol 1 clock source (Optional clock)
> > +      - description: UFS Phy Tx symbol 0 clock source (Optional clock)
> > +      - description: USB3 Phy wrapper pipe clock source (Optional clock)
> > +    minItems: 2
> 
> This does not look correct. Why clocks of GCC are inputs clocks to GCC?

Well, it is not a GCC clock. It is a fixed-clock fed into GCC.
The name is taken from downstream, but I'm pretty sure the HW clock is
named so. So I think we should keep it as is.

> 
> > +
> > +  clock-names:
> > +    items:
> > +      - const: bi_tcxo
> > +      - const: sleep_clk
> > +      - const: pcie_0_pipe_clk # Optional clock
> > +      - const: pcie_1_pipe_clk # Optional clock
> > +      - const: pcie_1_phy_aux_clk # Optional clock
> > +      - const: ufs_phy_rx_symbol_0_clk # Optional clock
> > +      - const: ufs_phy_rx_symbol_1_clk # Optional clock
> > +      - const: ufs_phy_tx_symbol_0_clk # Optional clock
> > +      - const: usb3_phy_wrapper_gcc_usb30_pipe_clk # Optional clock
> > +    minItems: 2
> > +
> > +  '#clock-cells':
> > +    const: 1
> > +
> > +  '#reset-cells':
> > +    const: 1
> > +
> > +  '#power-domain-cells':
> > +    const: 1
> > +
> > +  reg:
> > +    maxItems: 1
> 
> Drop all duplicated properties and use qcom,gcc.yaml. See commit
> 842b4ca1cb8cf54
> 

Will do.

> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - clocks
> > +  - clock-names
> > +  - '#clock-cells'
> > +  - '#reset-cells'
> > +  - '#power-domain-cells'
> 
> Drop redundant entries.

Will do.

> 
> > +
> > +allOf:
> > +  - $ref: qcom,gcc.yaml#
> > +
> 

Thanks,
Abel

> Best regards,
> Krzysztof
>