From: Linus Walleij <linus.walleij@linaro.org>
To: "Ivajlo Dimitrov" <ivo.g.dimitrov.75@gmail.com>,
"Linus Walleij" <linus.walleij@linaro.org>,
"Shubhrajyoti Datta" <omaplinuxkernel@gmail.com>,
"Carlos Chinea" <cch.devel@gmail.com>,
"Tony Lindgren" <tony@atomide.com>,
"Grant Likely" <grant.likely@linaro.org>,
"Rob Herring" <rob.herring@calxeda.com>,
"Pawel Moll" <pawel.moll@arm.com>,
"Mark Rutland" <mark.rutland@arm.com>,
"Stephen Warren" <swarren@wwwdotorg.org>,
"Ian Campbell" <ijc+devicetree@hellion.org.uk>,
"Rob Landley" <rob@landley.net>,
"Benoît Cousson" <bcousson@baylibre.com>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Linux-OMAP <linux-omap@vger.kernel.org>,
"Pali Rohár" <pali.rohar@gmail.com>,
"Ивайло Димитров" <freemangordon@abv.bg>,
"Joni Lapilainen" <joni.lapilainen@gmail.com>,
"Aaro Koskinen" <aaro.koskinen@iki.fi>,
"pavel@ucw.cz" <pavel@ucw.cz>
Subject: Re: Re: [RFCv4 06/11] misc: Introduce Nokia CMT driver
Date: Sun, 22 Dec 2013 11:22:06 +0100 [thread overview]
Message-ID: <CACRpkdZpAwemVCWubVC6Fe+CNrzPo97uTzyEQt1uD4M2iutnPQ@mail.gmail.com> (raw)
In-Reply-To: <20131217232525.GA12152@earth.universe>
On Wed, Dec 18, 2013 at 12:25 AM, Sebastian Reichel <sre@ring0.de> wrote:
> I had a look at both ofono's and freesmartphone.org's implementation
> for the GPIO handling and both implementations are very similar. I
> think it should be possible to move the state machine described in
> [0] into the kernel and provide a simple sysfs/uevent interface.
>
> I was thinking of something like /sys/devices/platform/nokia-cmt/state,
> which accepts "enable", "disable" and "reset" as input and outputs the
> current state.
>
> [0] https://git.kernel.org/cgit/network/ofono/ofono.git/tree/plugins/nokia-gpio.c
Yes this looks like kernel code shoehorned into userspace. As it
deals with suspending/resuming hardware for example, and that is
something the kernel needs to coordinate and do uniformly across
all devices (IMO).
A while back Arun Murthy was working on creating an embedded
modem subsystem but the development stopped. However such a
subsystem is a generic problem of general interest and this would be
one of the candidates for drivers/modem I think. Sadly creating it
may be a lot of work, I don't know exactly.
http://marc.info/?l=linux-kernel&m=135027904405680&w=2
Yours,
Linus Walleij
WARNING: multiple messages have this Message-ID (diff)
From: Linus Walleij <linus.walleij-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
To: "Ivajlo Dimitrov"
<ivo.g.dimitrov.75-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
"Linus Walleij"
<linus.walleij-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
"Shubhrajyoti Datta"
<omaplinuxkernel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
"Carlos Chinea"
<cch.devel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
"Tony Lindgren" <tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>,
"Grant Likely"
<grant.likely-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
"Rob Herring"
<rob.herring-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org>,
"Pawel Moll" <pawel.moll-5wv7dgnIgG8@public.gmane.org>,
"Mark Rutland" <mark.rutland-5wv7dgnIgG8@public.gmane.org>,
"Stephen Warren"
<swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>,
"Ian Campbell"
<ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org>,
"Rob Landley" <rob-VoJi6FS/r0vR7s880joybQ@public.gmane.org>,
"Benoît Cousson"
<bcousson-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>,
"devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Linux-OMAP <linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"Pali Rohár" <pali.rohar-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
"Ивайло Димитров" <freemangordon-uiMcrn6V0Vs@public.gmane.org>,
"Joni Lapilainen"
<joni.lapilainen-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: Re: Re: [RFCv4 06/11] misc: Introduce Nokia CMT driver
Date: Sun, 22 Dec 2013 11:22:06 +0100 [thread overview]
Message-ID: <CACRpkdZpAwemVCWubVC6Fe+CNrzPo97uTzyEQt1uD4M2iutnPQ@mail.gmail.com> (raw)
In-Reply-To: <20131217232525.GA12152-SfvFxonMDyemK9LvCR3Hrw@public.gmane.org>
On Wed, Dec 18, 2013 at 12:25 AM, Sebastian Reichel <sre-GFxCN5SEZAc@public.gmane.org> wrote:
> I had a look at both ofono's and freesmartphone.org's implementation
> for the GPIO handling and both implementations are very similar. I
> think it should be possible to move the state machine described in
> [0] into the kernel and provide a simple sysfs/uevent interface.
>
> I was thinking of something like /sys/devices/platform/nokia-cmt/state,
> which accepts "enable", "disable" and "reset" as input and outputs the
> current state.
>
> [0] https://git.kernel.org/cgit/network/ofono/ofono.git/tree/plugins/nokia-gpio.c
Yes this looks like kernel code shoehorned into userspace. As it
deals with suspending/resuming hardware for example, and that is
something the kernel needs to coordinate and do uniformly across
all devices (IMO).
A while back Arun Murthy was working on creating an embedded
modem subsystem but the development stopped. However such a
subsystem is a generic problem of general interest and this would be
one of the candidates for drivers/modem I think. Sadly creating it
may be a lot of work, I don't know exactly.
http://marc.info/?l=linux-kernel&m=135027904405680&w=2
Yours,
Linus Walleij
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next prev parent reply other threads:[~2013-12-22 10:22 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-15 23:27 [RFCv4 00/11] OMAP SSI driver / N900 modem support Sebastian Reichel
2013-12-15 23:27 ` Sebastian Reichel
2013-12-15 23:27 ` [RFCv4 01/11] HSI: method to unregister clients from an hsi port Sebastian Reichel
2013-12-15 23:27 ` [RFCv4 02/11] HSI: hsi-char: add Device Tree support Sebastian Reichel
2013-12-15 23:27 ` [RFCv4 03/11] HSI: hsi-char: fix driver for multiport scenarios Sebastian Reichel
2013-12-15 23:27 ` [RFCv4 04/11] ARM: OMAP2+: HSI: Introduce OMAP SSI driver Sebastian Reichel
2013-12-15 23:27 ` [RFCv4 05/11] Documentation: DT: omap-ssi binding documentation Sebastian Reichel
2013-12-19 19:03 ` Tony Lindgren
2014-01-10 23:52 ` Sebastian Reichel
2014-01-10 23:52 ` Sebastian Reichel
2013-12-15 23:27 ` [RFCv4 06/11] misc: Introduce Nokia CMT driver Sebastian Reichel
2013-12-16 9:48 ` Linus Walleij
2013-12-16 12:15 ` Sebastian Reichel
2013-12-16 13:31 ` Linus Walleij
2013-12-16 18:34 ` Sebastian Reichel
2013-12-17 17:58 ` Ivajlo Dimitrov
2013-12-17 17:58 ` Ivajlo Dimitrov
2013-12-17 23:25 ` Sebastian Reichel
2013-12-17 23:25 ` Sebastian Reichel
2013-12-22 10:22 ` Linus Walleij [this message]
2013-12-22 10:22 ` Linus Walleij
2013-12-15 23:28 ` [RFCv4 07/11] Documentation: DT: nokia-cmt binding documentation Sebastian Reichel
2013-12-15 23:28 ` [RFCv4 08/11] HSI: Introduce driver for SSI Protocol Sebastian Reichel
2013-12-15 23:28 ` [RFCv4 09/11] DTS: ARM: OMAP3-N900: Add SSI support Sebastian Reichel
2013-12-15 23:28 ` [RFCv4 10/11] DTS: ARM: OMAP3-N900: Add CMT support Sebastian Reichel
2013-12-15 23:28 ` [RFCv4 11/11] DTS: ARM: OMAP3-N900: Add SSI protocol support Sebastian Reichel
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