From: Kumar Gala <galak.kernel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Kumar Gala <galak.kernel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Mailing List
<devicetree-spec-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: UART map / multiple uart connections
Date: Fri, 19 Aug 2022 07:44:38 -0500 [thread overview]
Message-ID: <7C3B936E-9929-4612-A1C4-5B1084CF137D@kernel.org> (raw)
In-Reply-To: <669C8BA3-8022-43D2-A6D7-CB0CC0F8F2F0-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
> On Jul 14, 2022, at 10:58 AM, Kumar Gala <galak-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> wrote:
>
>
>
>> On Jul 12, 2022, at 9:33 AM, Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> wrote:
>>
>> On Thu, Jul 7, 2022 at 11:56 AM Kumar Gala <galak.kernel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>>>
>>> Wondering if your aware of any examples of how to describe a modem with multiple UART connections. Normally we have the “modem” as a child of the UART node. So that would work for one connection, but not sure how we’d describe a second UART connection. Some kinda of “uart-map”?
>>
>> I haven't seen that come up. The closest thing I can think of is USB3
>> hubs which also have a USB2 connection. Those show up as 2 nodes under
>> their respective controller with a phandle link to each other. Is
>> there a primary vs. secondary connection?
>>
>> Rob
>
> Do you have a pointer to the USB example?
>
> I think on of the uart’s could be considered the main connection point. But not sure it maters. I’m guessing we need a few standard properties to represent phandles to devices on buses that would normally have the nodes as children.
>
> So i2c, spi, uart, etc..
>
> - k
Rob, any follow up on this?
- k
prev parent reply other threads:[~2022-08-19 12:44 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-07 17:56 UART map / multiple uart connections Kumar Gala
[not found] ` <A6CFEC90-1DB9-419C-A9C6-4F490B06F015-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2022-07-12 14:33 ` Rob Herring
[not found] ` <CAL_JsqJ2_MRADvfHWARTVy4=9HnumB952WBnj-uNj1pnXxjSBg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2022-07-14 15:58 ` Kumar Gala
[not found] ` <669C8BA3-8022-43D2-A6D7-CB0CC0F8F2F0-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2022-08-19 12:44 ` Kumar Gala [this message]
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