linux-kernel - Re: [PATCH v2 1/2] dt-bindings: clock: Add Qualcomm SC8280XP GCC bindings

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Date:   Fri, 22 Apr 2022 20:02:57 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Stephen Boyd <sboyd@...nel.org>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Michael Turquette <mturquette@...libre.com>,
        Rob Herring <robh+dt@...nel.org>,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        quic_tdas@...cinc.com
Subject: Re: [PATCH v2 1/2] dt-bindings: clock: Add Qualcomm SC8280XP GCC
 bindings

On Fri 22 Apr 18:48 PDT 2022, Stephen Boyd wrote:

> Quoting Bjorn Andersson (2022-04-22 16:00:12)
> > Add binding for the Qualcomm SC8280XP Global Clock controller.
> > 
> > Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> 
> Why no cover letter?
> 

I didn't have anything useful to write in it. Will provide you one in
the future...

> > diff --git a/Documentation/devicetree/bindings/clock/qcom,gcc-sc8280xp.yaml b/Documentation/devicetree/bindings/clock/qcom,gcc-sc8280xp.yaml
> > new file mode 100644
> > index 000000000000..44e5f0d0a795
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/clock/qcom,gcc-sc8280xp.yaml
> > @@ -0,0 +1,199 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/clock/qcom,gcc-sc8280xp.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Qualcomm Global Clock & Reset Controller Binding for SC8280xp
> > +
> > +maintainers:
> > +  - Bjorn Andersson <bjorn.andersson@...aro.org>
> > +
> > +description: |
> > +  Qualcomm global clock control module which supports the clocks, resets and
> > +  power domains on SC8280xp.
> > +
> > +  See also:
> > +  - dt-bindings/clock/qcom,gcc-sc8280xp.h
> > +
> > +properties:
> > +  compatible:
> > +    const: qcom,gcc-sc8280xp
> > +
> > +  clocks:
> > +    items:
> > +      - description: XO reference clock
> 
> "clock" is redundant in all these descriptions. Please remove.
> 

You don't think it's a little bit odd to have description such as
"Sleep", "PCIe 2a pipe" or First EMAC controller reference"?

I mean I agree that it's obviously clocks we're talking about, but to me
that makes it seems like the descriptions are cut short, just for the
sake of avoiding "clock".

> > +      - description: Sleep clock
> > +      - description: UFS memory first RX symbol clock
> > +      - description: UFS memory second RX symbol clock
> > +      - description: UFS memory first TX symbol clock
> > +      - description: UFS card first RX symbol clock
> > +      - description: UFS card second RX symbol clock
> > +      - description: UFS card first TX symbol clock
> > +      - description: Primary USB SuperSpeed pipe clock
> > +      - description: gcc_usb4_phy_pipegmux_clk_src
> > +      - description: gcc_usb4_phy_dp_gmux_clk_src
> > +      - description: gcc_usb4_phy_sys_pipegmux_clk_src
> > +      - description: usb4_phy_gcc_usb4_pcie_pipe_clk
> > +      - description: usb4_phy_gcc_usb4rtr_max_pipe_clk
> > +      - description: Primary USB4 RX0 clock
> > +      - description: Primary USB4 RX1 clock
> > +      - description: Secondary USB SuperSpeed pipe clock
> > +      - description: gcc_usb4_1_phy_pipegmux_clk_src
> > +      - description: gcc_usb4_1_phy_dp_gmux_clk_src
> > +      - description: gcc_usb4_1_phy_sys_pipegmux_clk_src
> > +      - description: usb4_1_phy_gcc_usb4_pcie_pipe_clk
> > +      - description: usb4_1_phy_gcc_usb4rtr_max_pipe_clk
> > +      - description: Secondary USB4 RX0 clock
> > +      - description: Secondary USB4 RX0 clock
> > +      - description: Multiport USB first SupserSpeed pipe clock
> > +      - description: Multiport USB second SuperSpeed pipe clock
> > +      - description: PCIe 2a pipe clock
> > +      - description: PCIe 2b pipe clock
> > +      - description: PCIe 3a pipe clock
> > +      - description: PCIe 3b pipe clock
> > +      - description: PCIe 4 pipe clock
> > +      - description: First EMAC controller reference clock
> > +      - description: Second EMAC controller reference clock
> > +
> > +  clock-names:
> > +    items:
> > +      - const: bi_tcxo
> > +      - const: sleep_clk
> 
> And "_clk" postfix is redundant in all these strings. Remove?
> 

In this case I think they should include _clk, as they actually matches
the clock names in the documentation.

Regards,
Bjorn

> > +      - const: ufs_phy_rx_symbol_0_clk
> > +      - const: ufs_phy_rx_symbol_1_clk
> > +      - const: ufs_phy_tx_symbol_0_clk
> > +      - const: ufs_card_rx_symbol_0_clk
> > +      - const: ufs_card_rx_symbol_1_clk
> > +      - const: ufs_card_tx_symbol_0_clk
> > +      - const: usb3_phy_wrapper_gcc_usb30_pipe_clk
> > +      - const: gcc_usb4_phy_pipegmux_clk_src
> > +      - const: gcc_usb4_phy_dp_gmux_clk_src
> > +      - const: gcc_usb4_phy_sys_pipegmux_clk_src
> > +      - const: usb4_phy_gcc_usb4_pcie_pipe_clk
> > +      - const: usb4_phy_gcc_usb4rtr_max_pipe_clk
> > +      - const: qusb4phy_gcc_usb4_rx0_clk
> > +      - const: qusb4phy_gcc_usb4_rx1_clk
> > +      - const: usb3_uni_phy_sec_gcc_usb30_pipe_clk