From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kumar Gala Subject: Re: UART map / multiple uart connections Date: Fri, 19 Aug 2022 07:44:38 -0500 Message-ID: <7C3B936E-9929-4612-A1C4-5B1084CF137D@kernel.org> References: <669C8BA3-8022-43D2-A6D7-CB0CC0F8F2F0@kernel.org> Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3696.120.41.1.1\)) Content-Transfer-Encoding: quoted-printable Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=to:references:message-id:content-transfer-encoding:cc:date :in-reply-to:subject:mime-version:from:from:to:cc; bh=HF7bDivuL7OZJZdqspc3vgi+QS7efS1reqkypPp/ENU=; b=U1s4fL4nlKEEjP+SDIOPWyg+MdjWZ3K4yXO6I27Cab7VMu8xzKTT6XTejXsTgTIdCO aVs55iS13Sd2jPpSQAj6KVOcL6+WU6KWw/0GmzSzseKaiQBFMbl99T3cjJKD2tKDUTne 1NbWMywKUIQm7ZqFmWD1++n00OgNN4CSvovBxguRa6y0d3FitfvD7jlxXMJv/ddWVWUD S4oMNeawqC11rCuabD03RZYhZ4SI3MpaCz96yqvA0FyNg0u550R44RwcYg96I1vVFpOx u0XU4W7gWdKACDnlMzGwMYBP3XWvHj9cTp2eheF9jZapEPO/b7kKBNBVJ/zyOBGkWC6a aJJA== In-Reply-To: <669C8BA3-8022-43D2-A6D7-CB0CC0F8F2F0-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> List-ID: Content-Type: text/plain; charset="utf-8" To: Rob Herring Cc: Kumar Gala , Mailing List > On Jul 14, 2022, at 10:58 AM, Kumar Gala wrote: >=20 >=20 >=20 >> On Jul 12, 2022, at 9:33 AM, Rob Herring wrote: >>=20 >> On Thu, Jul 7, 2022 at 11:56 AM Kumar Gala = wrote: >>>=20 >>> Wondering if your aware of any examples of how to describe a modem = with multiple UART connections. Normally we have the =E2=80=9Cmodem=E2=80= =9D as a child of the UART node. So that would work for one connection, = but not sure how we=E2=80=99d describe a second UART connection. Some = kinda of =E2=80=9Cuart-map=E2=80=9D? >>=20 >> 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? >>=20 >> Rob >=20 > Do you have a pointer to the USB example? >=20 > I think on of the uart=E2=80=99s could be considered the main = connection point. But not sure it maters. I=E2=80=99m guessing we need = a few standard properties to represent phandles to devices on buses that = would normally have the nodes as children. >=20 > So i2c, spi, uart, etc..=20 >=20 > - k Rob, any follow up on this? - k=