linux-kernel - Re: [PATCH v3 04/19] dt-bindings: Add Qualcomm USB SuperSpeed PHY bindings

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Message-ID: <20200127183705.GA30702@bogus>
Date:   Mon, 27 Jan 2020 12:37:05 -0600
From:   Rob Herring <robh@...nel.org>
To:     Bryan O'Donoghue <bryan.odonoghue@...aro.org>
Cc:     linux-arm-msm@...r.kernel.org, linux-usb@...r.kernel.org,
        gregkh@...uxfoundation.org, jackp@...eaurora.org, balbi@...nel.org,
        bjorn.andersson@...aro.org, linux-kernel@...r.kernel.org,
        Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@...aro.org>,
        Jorge Ramirez-Ortiz <jorge.ramirez.ortiz@...il.com>,
        Mark Rutland <mark.rutland@....com>, devicetree@...r.kernel.org
Subject: Re: [PATCH v3 04/19] dt-bindings: Add Qualcomm USB SuperSpeed PHY
 bindings

On Wed, Jan 22, 2020 at 06:55:55PM +0000, Bryan O'Donoghue wrote:
> From: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@...aro.org>
> 
> Binding description for Qualcomm's Synopsys 1.0.0 SuperSpeed phy
> controller embedded in QCS404.
> 
> Based on Sriharsha Allenki's <sallenki@...eaurora.org> original
> definitions.
> 
> [bod: converted to yaml format]
> 
> Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@...aro.org>
> Cc: Jorge Ramirez-Ortiz <jorge.ramirez.ortiz@...il.com>
> Cc: Rob Herring <robh+dt@...nel.org>
> Cc: Mark Rutland <mark.rutland@....com>
> Cc: Bjorn Andersson <bjorn.andersson@...aro.org>
> Cc: Jorge Ramirez-Ortiz <jorge.ramirez.ortiz@...il.com>
> Cc: devicetree@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
> ---
>  .../bindings/phy/intel,lgm-emmc-phy.yaml      | 56 --------------

Working around errors? Should be fixed now, but not yet in linux-next.

>  .../devicetree/bindings/phy/qcom,usb-ss.yaml  | 75 +++++++++++++++++++
>  2 files changed, 75 insertions(+), 56 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/phy/intel,lgm-emmc-phy.yaml
>  create mode 100644 Documentation/devicetree/bindings/phy/qcom,usb-ss.yaml


> diff --git a/Documentation/devicetree/bindings/phy/qcom,usb-ss.yaml b/Documentation/devicetree/bindings/phy/qcom,usb-ss.yaml
> new file mode 100644
> index 000000000000..3325b2f2e6a8
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/qcom,usb-ss.yaml
> @@ -0,0 +1,75 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: "http://devicetree.org/schemas/phy/qcom,usb-ss.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> +
> +title: Qualcomm Synopsys 1.0.0 SuperSpeed USB PHY
> +
> +maintainers:
> +  - Bryan O'Donoghue <bryan.odonoghue@...aro.org>
> +
> +description: |
> +  Qualcomm Synopsys 1.0.0 SuperSpeed USB PHY
> +
> +properties:
> +  compatible:
> +    enum:
> +      - qcom,usb-ssphy

Should be SoC specific.

> +
> +  reg:
> +    maxItems: 1
> +    description: USB PHY base address and length of the register map.

Can drop this. Doesn't really add anything.

> +
> +  "#phy-cells":
> +    const: 0
> +    description: Should be 0. See phy/phy-bindings.txt for details.

'Should be 0' is already expressed by the schema. The remaining 
reference isn't needed.

> +
> +  clocks:
> +    maxItems: 3
> +    minItems: 3
> +    description: phandles for rpmcc clock, PHY AHB clock, SuperSpeed pipe clock.

Split the description into 3 entries of 'items'. With that, 
minItems/maxItems is implicit.

> +
> +  clock-names:
> +    items:
> +      - const: ref
> +      - const: phy

'ahb' seems like a better name.

> +      - const: pipe
> +
> +  vdd-supply:
> +    maxItems: 1

Drop.

> +    description: phandle to the regulator VDD supply node.
> +
> +  vdda1p8-supply:
> +    maxItems: 1

Drop.

> +    description: phandle to the regulator 1.8V supply node.
> +
> +  resets:
> +    items:
> +      - description: COM reset
> +      - description: PHY reset line
> +
> +  reset-names:
> +    items:
> +      - const: com
> +      - const: phy

required and additionalProperties needed.

> +examples:
> +  - |
> +    #include <dt-bindings/clock/qcom,gcc-qcs404.h>
> +    #include <dt-bindings/clock/qcom,rpmcc.h>
> +    usb3_phy: usb3-phy@...00 {
> +        compatible = "qcom,usb-ssphy";
> +        reg = <0x78000 0x400>;
> +        #phy-cells = <0>;
> +        clocks = <&rpmcc RPM_SMD_LN_BB_CLK>,
> +                 <&gcc GCC_USB_HS_PHY_CFG_AHB_CLK>,
> +                 <&gcc GCC_USB3_PHY_PIPE_CLK>;
> +        clock-names = "ref", "phy", "pipe";
> +        resets = <&gcc GCC_USB3_PHY_BCR>,
> +                 <&gcc GCC_USB3PHY_PHY_BCR>;
> +        reset-names = "com", "phy";
> +        vdd-supply = <&vreg_l3_1p05>;
> +        vdda1p8-supply = <&vreg_l5_1p8>;
> +    };
> +...
> -- 
> 2.25.0
>