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Date: Sun, 22 Dec 2013 11:22:06 +0100 From: Linus Walleij <linus.walleij@...aro.org> To: Ivajlo Dimitrov <ivo.g.dimitrov.75@...il.com>, Linus Walleij <linus.walleij@...aro.org>, Shubhrajyoti Datta <omaplinuxkernel@...il.com>, Carlos Chinea <cch.devel@...il.com>, Tony Lindgren <tony@...mide.com>, Grant Likely <grant.likely@...aro.org>, Rob Herring <rob.herring@...xeda.com>, Pawel Moll <pawel.moll@....com>, Mark Rutland <mark.rutland@....com>, Stephen Warren <swarren@...dotorg.org>, Ian Campbell <ijc+devicetree@...lion.org.uk>, Rob Landley <rob@...dley.net>, Benoît Cousson <bcousson@...libre.com>, "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Linux-OMAP <linux-omap@...r.kernel.org>, Pali Rohár <pali.rohar@...il.com>, Ивайло Димитров <freemangordon@....bg>, Joni Lapilainen <joni.lapilainen@...il.com>, Aaro Koskinen <aaro.koskinen@....fi>, "pavel@....cz" <pavel@....cz> Subject: Re: Re: [RFCv4 06/11] misc: Introduce Nokia CMT driver On Wed, Dec 18, 2013 at 12:25 AM, Sebastian Reichel <sre@...g0.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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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