RE: [PATCH v6 1/7] dt-bindings: usb: hd3ss3220 device tree binding document

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Hi Biju-san, Morimoto-san,

> From: Biju Das, Sent: Wednesday, May 22, 2019 8:00 PM
<snip>
> > > According to the connector/usb-connector.txt, should the connector
> > > node have ports, port@1 and an endpoint nodes like below?
> >
> > "ports" is needed if it has multiple "port", otherwise, single port is allowed
> > from OF-graph point of view.
> 
> OK. I will use single port on  the next patch series.

According to the connector/usb-connector.txt [1], even if this device uses a single port,
we should describe ports node and port@1 (for SuperSpeed) subnode like usb/typec-tcpci.txt.

[1]
Required nodes:
- any data bus to the connector should be modeled using the OF graph bindings
  specified in bindings/graph.txt, unless the bus is between parent node and
  the connector. Since single connector can have multiple data buses every bus
  has assigned OF graph port number as follows:
    0: High Speed (HS), present in all connectors,
    1: Super Speed (SS), present in SS capable connectors,
    2: Sideband use (SBU), present in USB-C.

Best regards,
Yoshihiro Shimoda





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