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From: Johan Hovold <johan@kernel.org>
To: Pavel Machek <pavel@ucw.cz>
Cc: Rob Herring <robh@kernel.org>, Tony Lindgren <tony@atomide.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Alan Cox <gnomes@lxorguk.ukuu.org.uk>,
	Lee Jones <lee.jones@linaro.org>, Jiri Slaby <jslaby@suse.cz>,
	Merlijn Wajer <merlijn@wizzup.org>,
	Peter Hurley <peter@hurleysoftware.com>,
	Sebastian Reichel <sre@kernel.org>,
	linux-serial@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org
Subject: Re: [PATCH 3/6] dt-bindings: serdev: ngsm: Add binding for GNSS child node
Date: Thu, 1 Apr 2021 11:43:02 +0200	[thread overview]
Message-ID: <YGWVpvEci16RpAOg@hovoldconsulting.com> (raw)
In-Reply-To: <20210305104635.GA16695@duo.ucw.cz>

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On Fri, Mar 05, 2021 at 11:46:35AM +0100, Pavel Machek wrote:
> Hi!
> 
> > > > For motorola modem case, we may have a GNSS device on channel 4.
> > > > Let's add that to the binding and example.
> > > > 
> > > > Signed-off-by: Tony Lindgren <tony@atomide.com>
> > > > ---
> > > >  .../devicetree/bindings/serdev/serdev-ngsm.yaml          | 9 +++++++++
> > > >  1 file changed, 9 insertions(+)
> 
> > 
> > And since we're describing a mux, I think you need nodes for the virtual
> > ports rather than a reg property in what should be a serial client. That
> > is something like
> > 
> > 	serial@nnn {
> > 		modem {
> > 			compatible = "etsi,ts27001-mux";
> > 
> > 			serial@4 {
> > 				compatible = "etsi,ts27001-serial";
> > 				reg = <4>;
> > 
> > 				gnss {
> > 					compatible = "motorola,motmdm-gnss";
> > 				};
> > 			};
> > 		};
> > 	};
> > 
> > This way you can actually use serdev for the client drivers (e.g. for
> > gnss), and those drivers also be used for non-muxed ports if needed
> > (e.g. over USB).
> 
> I have done changes you requested, and then hit "serdev is busy
> because it can have at most one child" limit in the code. You have
> pretty clean driver in your inbox, and no reply. No help with serdev
> core limitations, either. Can you start to communicate?

Heh, look at the devicetree example above that I gave you back in March.
It has the virtual serial ports described ("serial@4"), which you were
missing.

Johan

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  parent reply	other threads:[~2021-04-01  9:44 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-12 21:47 [PATCHv8 0/6] n_gsm serdev support and GNSS driver for droid4 Tony Lindgren
2020-05-12 21:47 ` [PATCH 1/6] tty: n_gsm: Add support for serdev drivers Tony Lindgren
2020-05-13 19:24   ` Pavel Machek
2020-05-28  9:31   ` Johan Hovold
2020-11-29 20:51     ` Pavel Machek
2020-05-12 21:47 ` [PATCH 2/6] dt-bindings: serdev: ngsm: Add binding for serdev-ngsm Tony Lindgren
2020-05-28  9:38   ` Johan Hovold
2020-05-12 21:47 ` [PATCH 3/6] dt-bindings: serdev: ngsm: Add binding for GNSS child node Tony Lindgren
2020-05-13 19:26   ` Pavel Machek
2020-05-27 19:28   ` Rob Herring
2020-05-28  9:51     ` Johan Hovold
2021-03-05 10:46       ` Pavel Machek
2021-03-05 10:52         ` Johan Hovold
2021-03-24  1:09           ` Pavel Machek
2021-04-01  9:43         ` Johan Hovold [this message]
2020-05-12 21:47 ` [PATCH 4/6] serdev: ngsm: Add generic serdev-ngsm driver Tony Lindgren
2020-05-28 12:43   ` Johan Hovold
2020-05-12 21:47 ` [PATCH 5/6] gnss: motmdm: Add support for Motorola Mapphone MDM6600 modem Tony Lindgren
2020-05-28 13:06   ` Johan Hovold
2020-05-28 23:38     ` Tony Lindgren
2020-05-12 21:47 ` [PATCH 6/6] ARM: dts: omap4-droid4: Configure modem for serdev-ngsm Tony Lindgren
2020-05-13 19:27   ` Pavel Machek
2020-05-13 19:09 ` [PATCHv8 0/6] n_gsm serdev support and GNSS driver for droid4 Pavel Machek
2020-05-14 17:31   ` Tony Lindgren
2020-05-22  9:17 ` Greg Kroah-Hartman
2020-05-25  7:44   ` Johan Hovold
2020-05-28  8:39 ` Johan Hovold
2020-05-28 12:57   ` Pavel Machek
2020-07-26  8:25   ` Pavel Machek
2020-07-28  8:36     ` Tony Lindgren
2020-12-16 22:56   ` Pavel Machek

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