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In-Reply-To: <604e653d-c1e2-45c7-b121-8a6b4be5c6bb@linaro.org>
From:   Anand Moon <linux.amoon@gmail.com>
Date:   Fri, 8 Dec 2023 05:54:43 +0530
Message-ID: <CANAwSgRB=XWo2-40rDru=Zy277-kgGNjozJ8Lxnxgv_4ABB-kg@mail.gmail.com>
Subject: Re: [PATCH v6 1/2] dt-bindings: usb: Add the binding example for the
 Genesys Logic GL3523 hub
To:     Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Cc:     Rob Herring <robh@kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Conor Dooley <conor+dt@kernel.org>,
        Icenowy Zheng <uwu@icenowy.me>,
        Neil Armstrong <neil.armstrong@linaro.org>,
        linux-amlogic@lists.infradead.org,
        Conor Dooley <conor.dooley@microchip.com>,
        linux-usb@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org
Content-Type: text/plain; charset="UTF-8"
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Hi Krzysztof,

On Thu, 7 Dec 2023 at 18:11, Krzysztof Kozlowski
<krzysztof.kozlowski@linaro.org> wrote:
>
> On 07/12/2023 13:33, Anand Moon wrote:
> > Hi Krzysztof
> >
> > On Thu, 7 Dec 2023 at 14:00, Krzysztof Kozlowski
> > <krzysztof.kozlowski@linaro.org> wrote:
> >>
> >> On 06/12/2023 18:14, Anand Moon wrote:
> >>> Hi Rob,
> >>>
> >>> On Wed, 6 Dec 2023 at 19:23, Rob Herring <robh@kernel.org> wrote:
> >>>>
> >>>> On Mon, Dec 04, 2023 at 08:14:25PM +0530, Anand Moon wrote:
> >>>>> Add the binding example for the USB3.1 Genesys Logic GL3523
> >>>>> integrates with USB 3.1 Gen 1 Super Speed and USB 2.0 High-Speed
> >>>>> hub.
> >>>>>
> >>>>> For onboard hub controllers that support USB 3.x and USB 2.0 hubs
> >>>>> with shared resets and power supplies, this property is used to identify
> >>>>> the hubs with which these are shared.
> >>>>>
> >>>>> GL3523 has built-in 5V to 3.3V and 5V to 1.2V regulators, which serves
> >>>>> power to the USB HUB, it uses 5V power regulator.
> >>>>>
> >>>>> Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
> >>>>> Signed-off-by: Anand Moon <linux.amoon@gmail.com>
> >>>>> ---
> >>>>> V6: fix the description of the regulators
> >>>>> Updated the commit message for regulator updates.
> >>>>> add reviewed by Conor Dooley
> >>>>> [1] https://lore.kernel.org/all/20231130053130.21966-2-linux.amoon@gmail.com/
> >>>>> v5: upgrade peer-hub description : Conor Dooley
> >>>>> [0] https://www.genesyslogic.com.tw/en/product_view.php?show=67 [Block Diagram]
> >>>>> v4: Fix the description of peer-hub and update the commit message.
> >>>>> Schematics of the Odroid N2+
> >>>>> https://dn.odroid.com/S922X/ODROID-N2/Schematic/odroid-n2_rev0.6_20210121.pdf
> >>>>> V3: fix the dt_binding_check error, added new example for Genesys GL3523
> >>>>> v2: added Genesys GL3523 binding
> >>>>> v1: none
> >>>>> ---
> >>>>>  .../bindings/usb/genesys,gl850g.yaml          | 65 +++++++++++++++++--
> >>>>>  1 file changed, 61 insertions(+), 4 deletions(-)
> >>>>>
> >>>>> diff --git a/Documentation/devicetree/bindings/usb/genesys,gl850g.yaml b/Documentation/devicetree/bindings/usb/genesys,gl850g.yaml
> >>>>> index ee08b9c3721f..c6f63a69396d 100644
> >>>>> --- a/Documentation/devicetree/bindings/usb/genesys,gl850g.yaml
> >>>>> +++ b/Documentation/devicetree/bindings/usb/genesys,gl850g.yaml
> >>>>> @@ -9,9 +9,6 @@ title: Genesys Logic USB hub controller
> >>>>>  maintainers:
> >>>>>    - Icenowy Zheng <uwu@icenowy.me>
> >>>>>
> >>>>> -allOf:
> >>>>> -  - $ref: usb-device.yaml#
> >>>>> -
> >>>>>  properties:
> >>>>>    compatible:
> >>>>>      enum:
> >>>>> @@ -27,12 +24,46 @@ properties:
> >>>>>
> >>>>>    vdd-supply:
> >>>>>      description:
> >>>>> -      the regulator that provides 3.3V core power to the hub.
> >>>>> +      The regulator that provides 3.3V or 5.0V core power to the hub.
> >>>>> +
> >>>>> +  peer-hub:
> >>>>> +    $ref: /schemas/types.yaml#/definitions/phandle
> >>>>> +    description:
> >>>>> +      For onboard hub controllers that support USB 3.x and USB 2.0 hubs
> >>>>> +      with shared resets and power supplies, this property is used to identify
> >>>>> +      the hubs with which these are shared.
> >>>>>
> >>>>>  required:
> >>>>>    - compatible
> >>>>>    - reg
> >>>>>
> >>>>> +allOf:
> >>>>> +  - $ref: usb-device.yaml#
> >>>>> +  - if:
> >>>>> +      properties:
> >>>>> +        compatible:
> >>>>> +          contains:
> >>>>> +            enum:
> >>>>> +              - usb5e3,608
> >>>>> +    then:
> >>>>> +      properties:
> >>>>> +        peer-hub: false
> >>>>> +        vdd-supply: false
> >>>>> +        reset-gpios: true
> >>>>> +
> >>>>> +  - if:
> >>>>> +      properties:
> >>>>> +        compatible:
> >>>>> +          contains:
> >>>>> +            enum:
> >>>>> +              - usb5e3,610
> >>>>> +              - usb5e3,620
> >>>>> +    then:
> >>>>> +      properties:
> >>>>> +        peer-hub: true
> >>>>> +        vdd-supply: true
> >>>>> +        reset-gpios: true
> >>>>
> >>>> No need for this if schema. The default is they are allowed.
> >>>>
> >>>
> >>> If I move reset-gpios to required, I observe the below warning.
> >>>
> >>>   DTC_CHK Documentation/devicetree/bindings/usb/maxim,max33359.example.dtb
> >>> /home/alarm/linux-amlogic-5.y-devel/Documentation/devicetree/bindings/usb/usb-device.example.dtb:
> >>> hub@1: 'reset-gpio' is a required property
> >>>         from schema $id: http://devicetree.org/schemas/usb/genesys,gl850g.yaml#
> >>
> >> Where are the properties defined? If you open the binding you see:
> >> nowhere. You cannot define properties in some variant with "true".
> >> Please define all of them in top-level and only narrow/constrain when
> >> applicable.
> >>
> > What I meant is the example below, required meant applicable for both
> > the binding
> > But it shows me the above warning.
>
> My explanation stands... So again:
>
> >> Please define all of them in top-level and only narrow/constrain when
> >> applicable.
>
Apologies, But I have tried this multiple times but have not been able
to fix the device tree warning
I have verified that example
Documentation/devicetree/bindings/usb/genesys,gl850g.example.dts
generate is correct

required:
  - compatible
  - reg
  - reset-gpio
  - peer-hub
  - vdd-supply

allOf:
  - $ref: usb-device.yaml#
  - if:
      properties:
        compatible:
          contains:
            enum:
              - usb5e3,608
    then:
      properties:
        peer-hub: false
        vdd-supply: false

  - if:
      properties:
        compatible:
          contains:
            enum:
              - usb5e3,610
              - usb5e3,620
    then:
      properties:
        peer-hub: true
        vdd-supply: true

additionalProperties: false

> Best regards,
> Krzysztof
>

Thanks
-Anand