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From: Pavel Machek <pavel-+ZI9xUNit7I@public.gmane.org>
To: "Dr. H. Nikolaus Schaller" <hns-xXXSsgcRVICgSpxsJD1C4w@public.gmane.org>
Cc: Sebastian Reichel <sre-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
	NeilBrown <neilb-l3A5Bk7waGM@public.gmane.org>,
	List for communicating with real GTA04 owners
	<gta04-owner-xXXSsgcRVICgSpxsJD1C4w@public.gmane.org>,
	Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>,
	One Thousand Gnomes
	<gnomes-qBU/x9rampVanCEyBjwyrvXRex20P6io@public.gmane.org>,
	Peter Hurley
	<peter-WaGBZJeGNqdsbIuE7sb01tBPR1lH4CV8@public.gmane.org>,
	Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>,
	Greg Kroah-Hartman
	<gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>,
	Grant Likely
	<grant.likely-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
	Jiri Slaby <jslaby-AlSwsSmVLrQ@public.gmane.org>,
	devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	lkml <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [Gta04-owner] [PATCH 3/3] tty/slaves: add a driver to power on/off UART attached devices.
Date: Sat, 4 Apr 2015 09:52:41 +0200	[thread overview]
Message-ID: <20150404075241.GC31064@amd> (raw)
In-Reply-To: <365B2C25-1782-4ADE-B620-190A4CC5E8E3-xXXSsgcRVICgSpxsJD1C4w@public.gmane.org>

Hi!

> >> And if you want to hide uart1 from the user-space, that should be a property
> >> of the uart1 node (whereever it is defined).
> > 
> > Sorry? That would be one heck of layering violation.
> 
> Which layering?

Device tree is not operating system specific. It does not know what
"user space" is, and can't assume we have uart nodes in
/dev. Therefore it can't contain information that it should be hidden.

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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WARNING: multiple messages have this Message-ID (diff)
From: Pavel Machek <pavel@ucw.cz>
To: "Dr. H. Nikolaus Schaller" <hns@goldelico.com>
Cc: Sebastian Reichel <sre@kernel.org>, NeilBrown <neilb@suse.de>,
	List for communicating with real GTA04 owners 
	<gta04-owner@goldelico.com>, Mark Rutland <mark.rutland@arm.com>,
	One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>,
	Peter Hurley <peter@hurleysoftware.com>,
	Arnd Bergmann <arnd@arndb.de>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Grant Likely <grant.likely@linaro.org>,
	Jiri Slaby <jslaby@suse.cz>,
	devicetree@vger.kernel.org, lkml <linux-kernel@vger.kernel.org>
Subject: Re: [Gta04-owner] [PATCH 3/3] tty/slaves: add a driver to power on/off UART attached devices.
Date: Sat, 4 Apr 2015 09:52:41 +0200	[thread overview]
Message-ID: <20150404075241.GC31064@amd> (raw)
In-Reply-To: <365B2C25-1782-4ADE-B620-190A4CC5E8E3@goldelico.com>

Hi!

> >> And if you want to hide uart1 from the user-space, that should be a property
> >> of the uart1 node (whereever it is defined).
> > 
> > Sorry? That would be one heck of layering violation.
> 
> Which layering?

Device tree is not operating system specific. It does not know what
"user space" is, and can't assume we have uart nodes in
/dev. Therefore it can't contain information that it should be hidden.

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

  parent reply	other threads:[~2015-04-04  7:52 UTC|newest]

Thread overview: 104+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-18  5:58 [PATCH 0/3] tty slave device support - version 3 NeilBrown
2015-03-18  5:58 ` [PATCH 2/3] TTY: add support for tty_slave devices NeilBrown
2015-03-18  9:11   ` Paul Bolle
2015-03-22  3:32     ` NeilBrown
2015-03-20 19:41   ` Pavel Machek
2015-03-22  3:42     ` [Gta04-owner] " NeilBrown
     [not found]       ` <20150322144209.14abc603-wvvUuzkyo1EYVZTmpyfIwg@public.gmane.org>
2015-03-22  7:58         ` Pavel Machek
2015-03-22  7:58           ` Pavel Machek
2015-03-24 10:31   ` Jiri Slaby
2015-03-30 23:45     ` NeilBrown
2015-03-25 16:30   ` Peter Hurley
2015-03-25 21:17     ` [Gta04-owner] " NeilBrown
2015-03-27 11:09       ` Peter Hurley
2015-03-31  0:33         ` NeilBrown
2015-03-18  5:58 ` [PATCH 3/3] tty/slaves: add a driver to power on/off UART attached devices NeilBrown
     [not found]   ` <20150318055831.21025.33670.stgit-wvvUuzkyo1EYVZTmpyfIwg@public.gmane.org>
2015-03-20  7:54     ` [Gta04-owner] " Dr. H. Nikolaus Schaller
2015-03-20  7:54       ` Dr. H. Nikolaus Schaller
     [not found]       ` <C53A3E5D-5AEA-4F0F-88A9-F9BC8CB0D0D6-xXXSsgcRVICgSpxsJD1C4w@public.gmane.org>
2015-03-20  8:54         ` NeilBrown
2015-03-20  8:54           ` NeilBrown
2015-03-20  9:34           ` Dr. H. Nikolaus Schaller
     [not found]             ` <14FB51CF-9568-4BF4-B917-2C019D992FDB-xXXSsgcRVICgSpxsJD1C4w@public.gmane.org>
2015-03-20 19:50               ` Pavel Machek
2015-03-20 19:50                 ` Pavel Machek
2015-03-20 23:31             ` NeilBrown
2015-03-24 17:58               ` Dr. H. Nikolaus Schaller
2015-03-25  1:45                 ` Sebastian Reichel
2015-03-25  7:59                   ` Dr. H. Nikolaus Schaller
2015-03-25 15:21                     ` Sebastian Reichel
2015-03-25 16:44                       ` Dr. H. Nikolaus Schaller
2015-03-26 18:08                         ` Sebastian Reichel
2015-03-27  9:22                           ` Dr. H. Nikolaus Schaller
2015-03-27 16:31                             ` Sebastian Reichel
2015-03-27 17:11                               ` Dr. H. Nikolaus Schaller
2015-04-27 20:35                                 ` Pavel Machek
2015-04-29  6:56                                   ` Dr. H. Nikolaus Schaller
2015-03-25 20:53                     ` Pavel Machek
2015-03-25 21:25                       ` Dr. H. Nikolaus Schaller
2015-03-25 21:25                         ` Dr. H. Nikolaus Schaller
     [not found]                         ` <1F3B5E32-1330-457C-AE25-791319293C38-xXXSsgcRVICgSpxsJD1C4w@public.gmane.org>
2015-03-26  5:56                           ` Pavel Machek
2015-03-26  5:56                             ` Pavel Machek
2015-03-26  6:44                             ` Dr. H. Nikolaus Schaller
     [not found]                               ` <365B2C25-1782-4ADE-B620-190A4CC5E8E3-xXXSsgcRVICgSpxsJD1C4w@public.gmane.org>
2015-04-04  7:52                                 ` Pavel Machek [this message]
2015-04-04  7:52                                   ` Pavel Machek
2015-03-25 20:42                 ` Pavel Machek
2015-03-25 21:22                   ` Dr. H. Nikolaus Schaller
2015-03-25 21:22                     ` Dr. H. Nikolaus Schaller
2015-03-18  5:58 ` [PATCH 1/3] TTY: use class_find_device to find port in uart_suspend/resume NeilBrown
     [not found]   ` <20150318055831.21025.27864.stgit-wvvUuzkyo1EYVZTmpyfIwg@public.gmane.org>
2015-03-25 16:20     ` Peter Hurley
2015-03-25 16:20       ` Peter Hurley
2015-03-29 21:49       ` [Gta04-owner] " NeilBrown
2015-03-20  7:54 ` [Gta04-owner] [PATCH 0/3] tty slave device support - version 3 Dr. H. Nikolaus Schaller
     [not found]   ` <80D7E742-4633-4CCD-B754-221387D82922-xXXSsgcRVICgSpxsJD1C4w@public.gmane.org>
2015-03-20  8:43     ` NeilBrown
2015-03-20  8:43       ` NeilBrown
2015-03-20  8:54       ` Dr. H. Nikolaus Schaller
2015-03-20 13:08         ` Sebastian Reichel
2015-03-20 13:57           ` Dr. H. Nikolaus Schaller
     [not found]             ` <72268D51-F993-497A-B4F9-707C8DB7155C-xXXSsgcRVICgSpxsJD1C4w@public.gmane.org>
2015-03-20 17:14               ` Sebastian Reichel
2015-03-20 17:14                 ` Sebastian Reichel
2015-03-20 19:31 ` Pavel Machek
     [not found] ` <20150318055437.21025.13990.stgit-wvvUuzkyo1EYVZTmpyfIwg@public.gmane.org>
2015-05-05 19:54   ` Peter Hurley
2015-05-05 19:54     ` Peter Hurley
2015-05-05 20:46     ` NeilBrown
     [not found]     ` <55492001.30806-WaGBZJeGNqdsbIuE7sb01tBPR1lH4CV8@public.gmane.org>
2015-05-06  5:19       ` [Gta04-owner] " Dr. H. Nikolaus Schaller
2015-05-06  5:19         ` Dr. H. Nikolaus Schaller
2015-05-06 11:10         ` Peter Hurley
     [not found]         ` <DE60E7AA-1BF4-4A68-9638-E09F85FD5C72-xXXSsgcRVICgSpxsJD1C4w@public.gmane.org>
2015-05-06  9:27           ` Pavel Machek
2015-05-06  9:27             ` Pavel Machek
2015-05-06 11:50             ` Dr. H. Nikolaus Schaller
2015-05-06 11:50               ` Dr. H. Nikolaus Schaller
2015-05-06 12:05               ` Peter Hurley
2015-05-06 12:27                 ` Dr. H. Nikolaus Schaller
2015-05-06 12:27                   ` Dr. H. Nikolaus Schaller
2015-05-06 12:36                   ` Mark Rutland
2015-05-06 13:28                     ` Dr. H. Nikolaus Schaller
2015-05-06 13:28                       ` Dr. H. Nikolaus Schaller
2015-05-06 14:15                       ` Mark Rutland
2015-05-06 16:09                         ` Dr. H. Nikolaus Schaller
2015-05-06 17:18                           ` Mark Rutland
2015-05-07 12:46                             ` Dr. H. Nikolaus Schaller
2015-05-07 12:46                               ` Dr. H. Nikolaus Schaller
2015-05-07 14:30                               ` Peter Hurley
2015-05-07 15:11                                 ` Dr. H. Nikolaus Schaller
2015-05-07 16:18                                   ` Peter Hurley
2015-05-07 16:57                                     ` Dr. H. Nikolaus Schaller
     [not found]                               ` <B4D487C5-C260-497B-A441-6C381D53616C-xXXSsgcRVICgSpxsJD1C4w@public.gmane.org>
2015-05-07 14:56                                 ` Peter Hurley
2015-05-07 14:56                                   ` Peter Hurley
     [not found]                                   ` <554B7D33.602-WaGBZJeGNqdsbIuE7sb01tBPR1lH4CV8@public.gmane.org>
2015-05-07 15:34                                     ` Dr. H. Nikolaus Schaller
2015-05-07 15:34                                       ` Dr. H. Nikolaus Schaller
2015-05-07 15:51                                       ` Peter Hurley
2015-05-07 16:46                                         ` Dr. H. Nikolaus Schaller
2015-05-13  8:09                                           ` Dr. H. Nikolaus Schaller
2015-06-03 11:49                                             ` [PATCH RFC 0/3] UART slave device support Dr. H. Nikolaus Schaller
     [not found]                                               ` <56C579D3-E8F8-4B5A-B6E8-993B113F3461-xXXSsgcRVICgSpxsJD1C4w@public.gmane.org>
2015-06-06 13:09                                                 ` Pavel Machek
2015-06-06 13:09                                                   ` Pavel Machek
     [not found]                                             ` <463356C5-E3C6-432C-A1C5-71F0287F1FEE@goldelico.com>
2015-06-03 12:09                                               ` [Gta04-owner] [PATCH RFC 3/3] misc: Add w2g0004 gps receiver driver Christ van Willegen
2015-05-07 15:37                       ` [Gta04-owner] [PATCH 0/3] tty slave device support - version 3 Peter Hurley
     [not found]               ` <A2594559-CA92-40C2-A06A-AC2483E85CB1-xXXSsgcRVICgSpxsJD1C4w@public.gmane.org>
2015-05-06 14:28                 ` Pavel Machek
2015-05-06 14:28                   ` Pavel Machek
2015-05-06 16:12                   ` Dr. H. Nikolaus Schaller
     [not found]                     ` <C68A105A-7147-4143-9B91-1A239726A780-xXXSsgcRVICgSpxsJD1C4w@public.gmane.org>
2015-06-06 13:09                       ` Pavel Machek
2015-06-06 13:09                         ` Pavel Machek
2015-06-06 18:53                         ` Belisko Marek
2015-06-06 18:55                           ` Belisko Marek
2015-05-07 15:48           ` Rob Herring
2015-05-07 15:48             ` Rob Herring

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