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From: Sebastian Reichel <sre@kernel.org>
To: One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>
Cc: "H. Nikolaus Schaller" <hns@goldelico.com>,
	Oleksij Rempel <linux@rempel-privat.de>,
	Rob Herring <robh@kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Marcel Holtmann <marcel@holtmann.org>,
	Jiri Slaby <jslaby@suse.com>, 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-serial@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [RFC PATCH 0/3] UART slave device bus
Date: Tue, 23 Aug 2016 01:10:46 +0200	[thread overview]
Message-ID: <20160822231043.y6yqwychgsttd24r@earth> (raw)
In-Reply-To: <20160822235256.2966dd49@lxorguk.ukuu.org.uk>

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Hi,

On Mon, Aug 22, 2016 at 11:52:56PM +0100, One Thousand Gnomes wrote:
> > There are usb-serial devices, which could benefit from support
> > btw. I would find it really useful, if the Dangerous Prototype's
> > Bus Pirate would expose native /dev/i2c and /dev/spi and it's
> > based on FT232.
> 
> That should just need an ldisc.

Right, since it does not need any extra resources. Probably not the
best example.

> I2C and SPI should at this point be sane for hotplugging as needed
> for an ldisc.

I guess hotplugging support in the downstream kernel frameworks
would be needed anyway with usb-serial being USB based.

> And having an ldisc also has another nice effect. You can plug the bus
> pirate into a remote machine, run an 8bit clean link over a pty/tty pair
> half way around the world and get a local i2c/spi to the remote machine's
> i2c/spi bus pirate ports and devices.

Right.

> It also means that if Bus Pirate 5 changes USB uart nothing breaks.

And it means no auto-support. Which would be fine in case of Bus
Pirate, since its mainly a developer device and some people may
actually prefer the IMHO anoying serial interface.

Let's forget that example.

-- Sebastian

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  reply	other threads:[~2016-08-22 23:10 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
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 [this message]
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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