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From: Rob Herring <robh@kernel.org>
Date: Fri, 6 Jan 2017 14:41:42 -0600
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Subject: Re: [PATCH 6/9] dt/bindings: Add a serial/UART attached device binding
To: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Marcel Holtmann <marcel@holtmann.org>, Jiri Slaby <jslaby@suse.com>,
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        "Dr . H . Nikolaus Schaller" <hns@goldelico.com>,
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On Fri, Jan 6, 2017 at 1:21 PM, Arnd Bergmann <arnd@arndb.de> wrote:
> On Friday, January 6, 2017 10:26:32 AM CET Rob Herring wrote:
>> +Optional Properties:
>> +
>> +- reg          : A single cell representing the port/line number of the
>> +                 host UART. Only used if the host UART is a single node
>> +                 with multiple ports.
>> +
>
> If there is a 'reg' property in the child, I guess we should also
> document a #address-cells/#size-cells value for the parent.
>
> Can you give an example of a multi-port serial device we support?

A 16550 DUART chip. Not sure if we have any bindings for one though.
Maybe the chip would be the parent node containing 2 child ns16550
nodes.

> I was expecting that we already need a device node per port anyway,
> to make the console work.

Yes, good point. I think I'll just drop it for now.

Rob