From: Andreas Kemnade <andreas@kemnade.info>
To: Johan Hovold <johan@kernel.org>
Cc: "Discussions about the Letux Kernel"
<letux-kernel@openphoenux.org>,
"H. Nikolaus Schaller" <hns@goldelico.com>,
"Mark Rutland" <mark.rutland@arm.com>,
devicetree@vger.kernel.org, linux-omap@vger.kernel.org,
"Arnd Bergmann" <arnd@arndb.de>,
"Tony Lindgren" <tony@atomide.com>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
kernel@pyra-handheld.com, "Russell King" <linux@armlinux.org.uk>,
linux-kernel@vger.kernel.org, "Rob Herring" <robh+dt@kernel.org>,
linux-arm-kernel@lists.infradead.org,
"Benoît Cousson" <bcousson@baylibre.com>,
"Kevin Hilman" <khilman@baylibre.com>,
"Thierry Reding" <treding@nvidia.com>,
"Andreas Färber" <afaerber@suse.de>,
"Jonathan Cameron" <jic23@kernel.org>
Subject: Re: [Letux-kernel] [PATCH v5 3/5] misc serdev: Add w2sg0004 (gps receiver) power control driver
Date: Tue, 9 Jan 2018 18:43:47 +0100 [thread overview]
Message-ID: <20180109184347.28ba0a6e@aktux> (raw)
In-Reply-To: <20171222124427.GI3374@localhost>
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On Fri, 22 Dec 2017 13:44:27 +0100
Johan Hovold <johan@kernel.org> wrote:
[...]
> I'd suggest reiterating the problem you're trying to solve and
> enumerating the previously discussed potential solutions in order to
> find a proper abstraction level for this (before getting lost in
> implementation details).
>
The main point here is in short words: Having a device powered on or off
when the uart it is attached to, is used or not used anymore,
so the already available userspace applications do not need to be changed.
I digged out a bit around:
alternative aproaches were:
adding hooks to the uart/tty layer:
https://marc.info/?l=linux-kernel&m=143333222014616&w=2
https://marc.info/?l=devicetree&m=143130955414580&w=2
I do not find it right now in my archive:
adding a virtual gpio for dtr to the omap_serial driver.
The driver behind the virtual io would then handle pm. One reason it was
rejected was that the devicetree should only contain real hardware and
not virtual stuff.
Regards,
Andreas
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WARNING: multiple messages have this Message-ID (diff)
From: Andreas Kemnade <andreas@kemnade.info>
To: Johan Hovold <johan@kernel.org>
Cc: "Mark Rutland" <mark.rutland@arm.com>,
devicetree@vger.kernel.org,
"Discussions about the Letux Kernel"
<letux-kernel@openphoenux.org>,
"Jonathan Cameron" <jic23@kernel.org>,
"Arnd Bergmann" <arnd@arndb.de>,
"Tony Lindgren" <tony@atomide.com>,
"H. Nikolaus Schaller" <hns@goldelico.com>,
kernel@pyra-handheld.com, "Russell King" <linux@armlinux.org.uk>,
linux-kernel@vger.kernel.org,
"Thierry Reding" <treding@nvidia.com>,
"Rob Herring" <robh+dt@kernel.org>,
"Kevin Hilman" <khilman@baylibre.com>,
"Benoît Cousson" <bcousson@baylibre.com>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
linux-omap@vger.kernel.org, "Andreas Färber" <afaerber@suse.de>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [Letux-kernel] [PATCH v5 3/5] misc serdev: Add w2sg0004 (gps receiver) power control driver
Date: Tue, 9 Jan 2018 18:43:47 +0100 [thread overview]
Message-ID: <20180109184347.28ba0a6e@aktux> (raw)
In-Reply-To: <20171222124427.GI3374@localhost>
[-- Attachment #1.1: Type: text/plain, Size: 1034 bytes --]
On Fri, 22 Dec 2017 13:44:27 +0100
Johan Hovold <johan@kernel.org> wrote:
[...]
> I'd suggest reiterating the problem you're trying to solve and
> enumerating the previously discussed potential solutions in order to
> find a proper abstraction level for this (before getting lost in
> implementation details).
>
The main point here is in short words: Having a device powered on or off
when the uart it is attached to, is used or not used anymore,
so the already available userspace applications do not need to be changed.
I digged out a bit around:
alternative aproaches were:
adding hooks to the uart/tty layer:
https://marc.info/?l=linux-kernel&m=143333222014616&w=2
https://marc.info/?l=devicetree&m=143130955414580&w=2
I do not find it right now in my archive:
adding a virtual gpio for dtr to the omap_serial driver.
The driver behind the virtual io would then handle pm. One reason it was
rejected was that the devicetree should only contain real hardware and
not virtual stuff.
Regards,
Andreas
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WARNING: multiple messages have this Message-ID (diff)
From: andreas@kemnade.info (Andreas Kemnade)
To: linux-arm-kernel@lists.infradead.org
Subject: [Letux-kernel] [PATCH v5 3/5] misc serdev: Add w2sg0004 (gps receiver) power control driver
Date: Tue, 9 Jan 2018 18:43:47 +0100 [thread overview]
Message-ID: <20180109184347.28ba0a6e@aktux> (raw)
In-Reply-To: <20171222124427.GI3374@localhost>
On Fri, 22 Dec 2017 13:44:27 +0100
Johan Hovold <johan@kernel.org> wrote:
[...]
> I'd suggest reiterating the problem you're trying to solve and
> enumerating the previously discussed potential solutions in order to
> find a proper abstraction level for this (before getting lost in
> implementation details).
>
The main point here is in short words: Having a device powered on or off
when the uart it is attached to, is used or not used anymore,
so the already available userspace applications do not need to be changed.
I digged out a bit around:
alternative aproaches were:
adding hooks to the uart/tty layer:
https://marc.info/?l=linux-kernel&m=143333222014616&w=2
https://marc.info/?l=devicetree&m=143130955414580&w=2
I do not find it right now in my archive:
adding a virtual gpio for dtr to the omap_serial driver.
The driver behind the virtual io would then handle pm. One reason it was
rejected was that the devicetree should only contain real hardware and
not virtual stuff.
Regards,
Andreas
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next prev parent reply other threads:[~2018-01-09 18:19 UTC|newest]
Thread overview: 100+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-01 7:49 [PATCH v5 0/5] misc serdev: new serdev based driver for Wi2Wi w2sg00x4 GPS module H. Nikolaus Schaller
2017-12-01 7:49 ` H. Nikolaus Schaller
2017-12-01 7:49 ` [PATCH v5 1/5] dt-bindings: define vendor prefix for Wi2Wi, Inc H. Nikolaus Schaller
2017-12-01 7:49 ` H. Nikolaus Schaller
2017-12-01 14:44 ` Andreas Färber
2017-12-01 14:44 ` Andreas Färber
2017-12-01 7:49 ` [PATCH v5 2/5] dt-bindings: gps: add w2sg00x4 bindings documentation (GPS module with UART)) H. Nikolaus Schaller
2017-12-01 7:49 ` H. Nikolaus Schaller
2017-12-01 7:49 ` H. Nikolaus Schaller
2017-12-01 7:49 ` [PATCH v5 3/5] misc serdev: Add w2sg0004 (gps receiver) power control driver H. Nikolaus Schaller
2017-12-01 7:49 ` H. Nikolaus Schaller
2017-12-01 7:49 ` H. Nikolaus Schaller
2017-12-22 12:44 ` Johan Hovold
2017-12-22 12:44 ` Johan Hovold
2017-12-22 12:44 ` Johan Hovold
2017-12-22 14:40 ` H. Nikolaus Schaller
2017-12-22 14:40 ` H. Nikolaus Schaller
2017-12-22 14:40 ` H. Nikolaus Schaller
2018-01-09 11:55 ` [Letux-kernel] " H. Nikolaus Schaller
2018-01-09 11:55 ` H. Nikolaus Schaller
2018-01-09 11:55 ` H. Nikolaus Schaller
2018-01-12 15:39 ` Johan Hovold
2018-01-12 15:39 ` Johan Hovold
2018-01-12 15:39 ` Johan Hovold
2018-01-12 17:59 ` H. Nikolaus Schaller
2018-01-12 17:59 ` H. Nikolaus Schaller
2018-01-12 17:59 ` H. Nikolaus Schaller
2018-01-18 6:13 ` Johan Hovold
2018-01-18 6:13 ` Johan Hovold
2018-01-18 6:13 ` Johan Hovold
2018-01-18 13:43 ` H. Nikolaus Schaller
2018-01-18 13:43 ` H. Nikolaus Schaller
2018-01-18 13:43 ` H. Nikolaus Schaller
2018-03-07 15:53 ` H. Nikolaus Schaller
2018-03-07 15:53 ` H. Nikolaus Schaller
2018-03-07 15:53 ` H. Nikolaus Schaller
2018-03-19 14:05 ` Johan Hovold
2018-03-19 14:05 ` Johan Hovold
2018-03-19 14:05 ` Johan Hovold
2018-02-12 15:26 ` [Letux-kernel] " Pavel Machek
2018-02-12 15:26 ` Pavel Machek
2018-02-12 15:26 ` Pavel Machek
2018-02-27 7:04 ` Johan Hovold
2018-02-27 7:04 ` Johan Hovold
2018-02-27 7:04 ` Johan Hovold
2018-02-27 7:32 ` H. Nikolaus Schaller
2018-02-27 7:32 ` H. Nikolaus Schaller
2018-02-27 7:32 ` H. Nikolaus Schaller
2018-03-19 13:54 ` Johan Hovold
2018-03-19 13:54 ` Johan Hovold
2018-03-19 13:54 ` Johan Hovold
2018-03-20 14:49 ` H. Nikolaus Schaller
2018-03-20 14:49 ` H. Nikolaus Schaller
2018-03-20 14:49 ` H. Nikolaus Schaller
2018-03-26 13:59 ` Pavel Machek
2018-03-26 13:59 ` Pavel Machek
2018-02-27 18:38 ` Pavel Machek
2018-02-27 18:38 ` Pavel Machek
2018-02-27 18:38 ` Pavel Machek
2018-02-12 15:25 ` Pavel Machek
2018-02-12 15:25 ` Pavel Machek
2018-01-09 17:43 ` Andreas Kemnade [this message]
2018-01-09 17:43 ` Andreas Kemnade
2018-01-09 17:43 ` Andreas Kemnade
2018-01-12 14:46 ` Johan Hovold
2018-01-12 14:46 ` Johan Hovold
2018-01-12 18:40 ` Andreas Kemnade
2018-01-12 18:40 ` Andreas Kemnade
2018-01-12 18:40 ` Andreas Kemnade
2018-01-18 6:47 ` Johan Hovold
2018-01-18 6:47 ` Johan Hovold
2018-01-18 6:47 ` Johan Hovold
2018-03-08 6:16 ` Andreas Kemnade
2018-03-08 6:16 ` Andreas Kemnade
2018-03-19 14:02 ` Johan Hovold
2018-03-19 14:02 ` Johan Hovold
2017-12-01 7:49 ` [PATCH v5 4/5] DTS: gta04: add uart2 child node for w2sg00x4 H. Nikolaus Schaller
2017-12-01 7:49 ` H. Nikolaus Schaller
2017-12-21 14:53 ` Tony Lindgren
2017-12-21 14:53 ` Tony Lindgren
2017-12-21 14:53 ` Tony Lindgren
2017-12-01 7:49 ` [PATCH v5 5/5] misc serdev: w2sg0004: add debugging code and Kconfig H. Nikolaus Schaller
2017-12-01 7:49 ` H. Nikolaus Schaller
2017-12-01 7:49 ` H. Nikolaus Schaller
2017-12-22 12:51 ` Johan Hovold
2017-12-22 12:51 ` Johan Hovold
2017-12-22 12:51 ` Johan Hovold
2017-12-22 14:41 ` H. Nikolaus Schaller
2017-12-22 14:41 ` H. Nikolaus Schaller
2017-12-22 14:58 ` Greg Kroah-Hartman
2017-12-22 14:58 ` Greg Kroah-Hartman
2017-12-22 14:58 ` Greg Kroah-Hartman
2017-12-18 8:52 ` [PATCH v5 0/5] misc serdev: new serdev based driver for Wi2Wi w2sg00x4 GPS module H. Nikolaus Schaller
2017-12-18 8:52 ` H. Nikolaus Schaller
2017-12-18 8:52 ` H. Nikolaus Schaller
2017-12-18 14:48 ` Greg Kroah-Hartman
2017-12-18 14:48 ` Greg Kroah-Hartman
2017-12-18 14:52 ` H. Nikolaus Schaller
2017-12-18 14:52 ` H. Nikolaus Schaller
2017-12-18 14:52 ` H. Nikolaus Schaller
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