linux-kernel - Re: [PATCH v2 2/6] dt-bindings: phy: qcom,m31: Document qcom,m31 USB phy

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Date:   Fri, 23 Jun 2023 11:15:10 +0530
From:   Varadarajan Narayanan <quic_varada@...cinc.com>
To:     Rob Herring <robh@...nel.org>
CC:     <agross@...nel.org>, <andersson@...nel.org>,
        <konrad.dybcio@...aro.org>, <vkoul@...nel.org>,
        <kishon@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <conor+dt@...nel.org>, <gregkh@...uxfoundation.org>,
        <catalin.marinas@....com>, <will@...nel.org>,
        <p.zabel@...gutronix.de>, <arnd@...db.de>,
        <geert+renesas@...der.be>, <neil.armstrong@...aro.org>,
        <nfraprado@...labora.com>, <broonie@...nel.org>,
        <rafal@...ecki.pl>, <quic_srichara@...cinc.com>,
        <quic_varada@...cinc.org>, <quic_wcheng@...cinc.com>,
        <linux-arm-msm@...r.kernel.org>, <linux-phy@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-usb@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 2/6] dt-bindings: phy: qcom,m31: Document qcom,m31 USB
 phy

On Thu, Jun 22, 2023 at 08:46:27AM -0600, Rob Herring wrote:
> On Thu, Jun 22, 2023 at 11:52:09AM +0530, Varadarajan Narayanan wrote:
> > Document the M31 USB2 phy present in IPQ5332.
> >
> > Signed-off-by: Sricharan Ramabadhran <quic_srichara@...cinc.com>
> > Signed-off-by: Varadarajan Narayanan <quic_varada@...cinc.com>
> > ---
> > v1:
> > 	Rename qcom,m31.yaml -> qcom,ipq5332-usb-hsphy.yaml
> > 	Drop default binding "m31,usb-hsphy"
> > 	Add clock
> > 	Remove 'oneOf' from compatible
> > 	Remove 'qscratch' region from register space as it is not needed
> > 	Remove reset-names
> > 	Fix the example definition
> > ---
> >  .../bindings/phy/qcom,ipq5332-usb-hsphy.yaml       | 51 ++++++++++++++++++++++
> >  1 file changed, 51 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/phy/qcom,ipq5332-usb-hsphy.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/phy/qcom,ipq5332-usb-hsphy.yaml b/Documentation/devicetree/bindings/phy/qcom,ipq5332-usb-hsphy.yaml
> > new file mode 100644
> > index 0000000..ab2e945
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/phy/qcom,ipq5332-usb-hsphy.yaml
> > @@ -0,0 +1,51 @@
> > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/phy/qcom,ipq5332-usb-hsphy.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: M31 (https://www.m31tech.com) USB PHY
>
> Put the URL in 'description'.

Ok.

> > +
> > +maintainers:
> > +  - Sricharan Ramabadhran <quic_srichara@...cinc.com>
> > +  - Varadarajan Narayanan <quic_varada@...cinc.org>
>
> .org? It's .com everywhere else.

Ok.

> > +
> > +description:
> > +  USB M31 PHY found in Qualcomm IPQ5018, IPQ5332 SoCs.
>
> Where's the IPQ5018 compatible?

In the previous version had a default and IPQ5332 specific
compatible. IPQ5018 would have used the default compatible.
However, in the review was asked to drop the default compatible.
Hence planned to include ipq5018 compatible and post it in
separate patchset while enabling IPQ5018 USB. IPQ5018 init is
also diffferent from the init used here.

> > +
> > +properties:
> > +  compatible:
> > +    items:
> > +      - enum:
> > +          - qcom,ipq5332-usb-hsphy
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  clocks:
> > +    maxItems: 1
> > +
> > +  clock-names:
> > +    maxItems: 1
> > +    contains:
>
> 'contains' is not appropriate here. Drop.
>
> > +      items:
> > +        - const: cfg_ahb
>
> Don't need both items list and maxItems. Really, you don't need
> 'clock-names' at all because there is only 1 clock.

Will drop 'clock-names'.

> > +
> > +  resets:
> > +    maxItems: 1
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/clock/qcom,ipq5332-gcc.h>
> > +    usbphy0: ipq5332-hsphy@...00 {
>
> Drop unused labels.

Ok.

> > +    	compatible = "qcom,ipq5332-usb-hsphy";
> > +    	reg = <0x0007b000 0x12c>;
> > +
> > +    	clocks = <&gcc GCC_USB0_PHY_CFG_AHB_CLK>;
> > +    	clock-names = "cfg_ahb";
> > +
> > +    	resets = <&gcc GCC_QUSB2_0_PHY_BCR>;
>
> Whitespace errors in here.

Ok.

Thanks
Varada

> > +    };
> > +
> > --
> > 2.7.4
> >