linux-kernel - Re: [PATCH v2 1/2] dt-bindings: usb: Add Parade PS8830 Type-C retimer bindings

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Message-ID: <ZxdN/Kr5ej2YFv9T@linaro.org>
Date: Tue, 22 Oct 2024 10:02:20 +0300
From: Abel Vesa <abel.vesa@...aro.org>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc: Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, linux-arm-msm@...r.kernel.org,
	Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konradybcio@...nel.org>,
	Rajendra Nayak <quic_rjendra@...cinc.com>,
	Sibi Sankar <quic_sibis@...cinc.com>,
	Johan Hovold <johan@...nel.org>,
	Trilok Soni <quic_tsoni@...cinc.com>, linux-kernel@...r.kernel.org,
	linux-usb@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v2 1/2] dt-bindings: usb: Add Parade PS8830 Type-C
 retimer bindings

On 24-10-06 18:28:52, Dmitry Baryshkov wrote:
> On Fri, Oct 04, 2024 at 04:57:37PM GMT, Abel Vesa wrote:
> > Document bindings for the Parade PS8830 Type-C retimer. This retimer is
> > currently found on all boards featuring Qualcomm Snapdragon X Elite SoCs
> > and it is needed to provide altmode muxing between DP and USB, but also
> > connector orientation handling between.
> > 
> > Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
> > ---
> >  .../devicetree/bindings/usb/parade,ps8830.yaml     | 129 +++++++++++++++++++++
> >  1 file changed, 129 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/usb/parade,ps8830.yaml b/Documentation/devicetree/bindings/usb/parade,ps8830.yaml
> > new file mode 100644
> > index 0000000000000000000000000000000000000000..f6721d6eee26c6d4590a12c19791b3d47a8145f3
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/usb/parade,ps8830.yaml
> > @@ -0,0 +1,129 @@
> > +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/usb/parade,ps8830.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Parade PS8830 USB and DisplayPort Retimer
> > +
> > +maintainers:
> > +  - Abel Vesa <abel.vesa@...aro.org>
> > +
> > +properties:
> > +  compatible:
> > +    enum:
> > +      - parade,ps8830
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  clocks:
> > +    items:
> > +      - description: XO Clock
> > +
> > +  clock-names:
> > +    items:
> > +      - const: xo
> > +
> > +  reset-gpios:
> > +    maxItems: 1
> > +
> > +  vdd-supply:
> > +    description: power supply (1.07V)
> > +
> > +  vdd33-supply:
> > +    description: power supply (3.3V)
> > +
> > +  vdd33-cap-supply:
> > +    description: power supply (3.3V)
> > +
> > +  vddar-supply:
> > +    description: power supply (1.07V)
> > +
> > +  vddat-supply:
> > +    description: power supply (1.07V)
> 
> Any additional details?

Documentation doesn't say anything more than this.

> 
> > +
> > +  vddio-supply:
> > +    description: power supply (1.2V or 1.8V)
> > +
> > +  orientation-switch: true
> > +  retimer-switch: true
> > +
> > +  ports:
> > +    $ref: /schemas/graph.yaml#/properties/ports
> > +    properties:
> > +      port@0:
> > +        $ref: /schemas/graph.yaml#/properties/port
> > +        description: Super Speed (SS) Output endpoint to the Type-C connector
> > +
> > +      port@1:
> > +        $ref: /schemas/graph.yaml#/$defs/port-base
> > +        description: Super Speed (SS) Input endpoint from the Super-Speed PHY
> 
> or from another SS signal source, which can be a mux, a switch or
> anything else. I'd say, just 'Input Super Speed (SS)'

Will use that.

> 
> > +        unevaluatedProperties: false
> > +
> > +      port@2:
> > +        $ref: /schemas/graph.yaml#/properties/port
> > +        description:
> > +          Sideband Use (SBU) AUX lines endpoint to the Type-C connector for the purpose of
> > +          handling altmode muxing and orientation switching.
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +
> > +allOf:
> > +  - $ref: usb-switch.yaml#
> > +
> > +additionalProperties: false
> > +
> 
> -- 
> With best wishes
> Dmitry