From: One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Marcel Holtmann <marcel@holtmann.org>,
"H. Nikolaus Schaller" <hns@goldelico.com>,
Rob Herring <robh@kernel.org>, Jiri Slaby <jslaby@suse.com>,
Sebastian Reichel <sre@kernel.org>, Pavel Machek <pavel@ucw.cz>,
Peter Hurley <peter@hurleysoftware.com>,
NeilBrown <neil@brown.name>, Arnd Bergmann <arnd@arndb.de>,
Linus Walleij <linus.walleij@linaro.org>,
"open list:BLUETOOTH DRIVERS" <linux-bluetooth@vger.kernel.org>,
linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH 0/3] UART slave device bus
Date: Thu, 18 Aug 2016 16:13:07 +0100 [thread overview]
Message-ID: <20160818161307.5c5d1635@lxorguk.ukuu.org.uk> (raw)
In-Reply-To: <20160818112435.GA20876@kroah.com>
> > we have a GPS line discipline? What is that one doing? As far as I
> > know all GPS implementations are fully userspace.
>
> Hm, for some reason I thought that was what n_gsm.c was being used for,
> but I could be wrong, I've never seen the hardware that uses that
> code...
You probably have actually. It's the standard multiplexing protocol on
lots of 3G modems. It's an AT command that switches mode.
However it illustrates the kind of problems with trying to short circuit
the tty_port code. It's entirely possible for a modem to expose the GPS
on a channel of the multiplex on the USB connection to the modem which is
itself dynamic and can be hot unplugged.
Short circuiting the tty_port layer is not a trivial exercise.
Alan
next prev parent reply other threads:[~2016-08-18 15:13 UTC|newest]
Thread overview: 139+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-18 1:14 [RFC PATCH 0/3] UART slave device bus Rob Herring
2016-08-18 1:14 ` [RFC PATCH 1/3] uart bus: Introduce new bus for UART slave devices Rob Herring
2016-08-18 1:14 ` [RFC PATCH 2/3] tty: serial_core: make tty_struct optional Rob Herring
2016-08-18 10:50 ` Pavel Machek
2016-08-18 1:14 ` [RFC PATCH 3/3] tty: serial_core: add uart controller registration Rob Herring
2016-08-18 10:22 ` [RFC PATCH 0/3] UART slave device bus Greg Kroah-Hartman
2016-08-18 10:22 ` Greg Kroah-Hartman
2016-08-18 10:30 ` Marcel Holtmann
2016-08-18 10:53 ` Greg Kroah-Hartman
2016-08-18 13:53 ` Rob Herring
2016-08-18 13:15 ` Rob Herring
2016-08-18 15:04 ` One Thousand Gnomes
2016-08-18 18:33 ` Rob Herring
2016-08-19 11:03 ` One Thousand Gnomes
2016-08-25 16:40 ` Rob Herring
2016-08-25 16:40 ` Rob Herring
2016-08-26 13:12 ` One Thousand Gnomes
2016-08-18 10:39 ` H. Nikolaus Schaller
2016-08-18 10:39 ` H. Nikolaus Schaller
2016-08-18 10:47 ` Pavel Machek
2016-08-18 10:54 ` H. Nikolaus Schaller
2016-08-18 10:54 ` H. Nikolaus Schaller
2016-08-18 10:57 ` Greg Kroah-Hartman
2016-08-18 11:14 ` H. Nikolaus Schaller
2016-08-18 11:14 ` H. Nikolaus Schaller
2016-08-18 11:14 ` H. Nikolaus Schaller
2016-08-18 14:40 ` One Thousand Gnomes
2016-08-18 14:40 ` One Thousand Gnomes
2016-08-18 14:58 ` Greg Kroah-Hartman
2016-08-18 11:27 ` H. Nikolaus Schaller
2016-08-18 10:49 ` Marcel Holtmann
2016-08-18 10:55 ` Greg Kroah-Hartman
2016-08-18 11:01 ` Marcel Holtmann
2016-08-18 11:24 ` Greg Kroah-Hartman
2016-08-18 11:42 ` Pavel Machek
2016-08-18 11:42 ` Pavel Machek
2016-08-18 11:51 ` Marcel Holtmann
2016-08-18 11:51 ` Marcel Holtmann
2016-08-18 15:14 ` One Thousand Gnomes
2016-08-18 15:13 ` One Thousand Gnomes [this message]
2016-08-18 11:10 ` Pavel Machek
2016-08-18 11:18 ` H. Nikolaus Schaller
2016-08-18 11:49 ` Marcel Holtmann
2016-08-18 12:16 ` H. Nikolaus Schaller
2016-08-18 12:16 ` H. Nikolaus Schaller
2016-08-18 15:15 ` One Thousand Gnomes
2016-08-18 11:47 ` Marcel Holtmann
2016-08-18 13:01 ` Pavel Machek
2016-08-18 15:16 ` One Thousand Gnomes
2016-08-18 11:02 ` H. Nikolaus Schaller
2016-08-18 11:02 ` H. Nikolaus Schaller
2016-08-18 11:41 ` Marcel Holtmann
2016-08-18 12:07 ` H. Nikolaus Schaller
2016-08-18 12:07 ` H. Nikolaus Schaller
2016-08-18 12:07 ` H. Nikolaus Schaller
2016-08-18 11:02 ` Pavel Machek
2016-08-18 13:07 ` Linus Walleij
2016-08-18 17:31 ` Marcel Holtmann
2016-08-18 14:25 ` One Thousand Gnomes
2016-08-18 15:14 ` H. Nikolaus Schaller
2016-08-18 15:14 ` H. Nikolaus Schaller
2016-08-18 15:38 ` One Thousand Gnomes
2016-08-18 18:31 ` H. Nikolaus Schaller
2016-08-18 18:31 ` H. Nikolaus Schaller
2016-08-18 22:25 ` Rob Herring
2016-08-19 11:38 ` One Thousand Gnomes
2016-08-19 15:36 ` Sebastian Reichel
2016-08-18 20:29 ` Sebastian Reichel
2016-08-18 23:08 ` Rob Herring
2016-08-19 5:21 ` Sebastian Reichel
2016-08-19 7:29 ` H. Nikolaus Schaller
2016-08-19 7:49 ` Oleksij Rempel
2016-08-19 7:49 ` Oleksij Rempel
2016-08-19 17:50 ` H. Nikolaus Schaller
2016-08-19 20:19 ` Oleksij Rempel
2016-08-19 20:19 ` Oleksij Rempel
2016-08-20 13:34 ` One Thousand Gnomes
2016-08-21 7:50 ` H. Nikolaus Schaller
2016-08-21 7:50 ` H. Nikolaus Schaller
2016-08-22 20:39 ` Sebastian Reichel
2016-08-22 21:23 ` H. Nikolaus Schaller
2016-08-22 21:43 ` Arnd Bergmann
2016-08-22 22:42 ` Sebastian Reichel
2016-08-22 22:52 ` One Thousand Gnomes
2016-08-22 23:10 ` Sebastian Reichel
2016-08-23 7:28 ` H. Nikolaus Schaller
2016-08-27 12:01 ` Michal Suchanek
2016-08-19 11:06 ` One Thousand Gnomes
2016-08-19 17:42 ` H. Nikolaus Schaller
2016-08-19 17:42 ` H. Nikolaus Schaller
2016-08-20 13:22 ` One Thousand Gnomes
2016-08-20 13:22 ` One Thousand Gnomes
2016-08-21 7:50 ` H. Nikolaus Schaller
2016-08-21 7:50 ` H. Nikolaus Schaller
2016-08-21 7:50 ` H. Nikolaus Schaller
2016-08-21 17:09 ` One Thousand Gnomes
2016-08-21 18:23 ` H. Nikolaus Schaller
2016-08-21 18:23 ` H. Nikolaus Schaller
2016-08-22 9:09 ` One Thousand Gnomes
2016-08-22 9:33 ` Marcel Holtmann
2016-08-22 9:33 ` Marcel Holtmann
2016-08-19 11:03 ` One Thousand Gnomes
2016-08-19 11:03 ` One Thousand Gnomes
2016-08-19 14:44 ` Sebastian Reichel
2016-08-22 12:37 ` Arnd Bergmann
2016-08-22 13:38 ` Rob Herring
2016-08-22 15:24 ` Arnd Bergmann
2016-08-22 15:28 ` Marcel Holtmann
2016-08-22 15:46 ` Arnd Bergmann
2016-08-22 15:45 ` One Thousand Gnomes
2016-08-22 21:07 ` Marcel Holtmann
2016-08-22 21:35 ` One Thousand Gnomes
2016-08-22 22:03 ` Sebastian Reichel
2016-08-22 22:46 ` One Thousand Gnomes
2016-08-22 23:41 ` Sebastian Reichel
2016-08-24 12:14 ` Linus Walleij
2016-08-22 16:44 ` Rob Herring
2016-08-22 17:02 ` One Thousand Gnomes
2016-08-22 17:30 ` Rob Herring
2016-08-22 17:30 ` Rob Herring
2016-08-22 17:38 ` One Thousand Gnomes
2016-08-22 21:16 ` Marcel Holtmann
2016-08-22 21:32 ` One Thousand Gnomes
2016-08-22 22:00 ` Pavel Machek
2016-08-22 22:54 ` One Thousand Gnomes
2016-08-22 23:57 ` Sebastian Reichel
2016-08-23 0:15 ` One Thousand Gnomes
2016-08-23 0:57 ` Sebastian Reichel
2016-08-24 13:57 ` One Thousand Gnomes
2016-08-24 13:57 ` One Thousand Gnomes
2016-08-24 14:29 ` Marcel Holtmann
2016-08-24 14:29 ` Marcel Holtmann
2016-08-23 11:42 ` Marcel Holtmann
2016-08-22 23:02 ` Sebastian Reichel
2016-08-22 20:00 ` Sebastian Reichel
2016-08-22 22:00 ` Rob Herring
2016-08-22 22:00 ` Rob Herring
2016-08-22 22:18 ` Sebastian Reichel
2016-08-23 21:04 ` Rob Herring
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