Re: Nokia N900 sound driver and ECI GPIOs

From	Pavel Machek <pavel@ucw.cz>
Newsgroups	linux.kernel
Subject	Re: Nokia N900 sound driver and ECI GPIOs
Date	2017-01-02 10:40 +0100
Message-ID	<sV7fY-4MF-19@gated-at.bofh.it> (permalink)
References	<sUUsq-4Ah-9@gated-at.bofh.it> <sUWXg-6gu-15@gated-at.bofh.it> <sV76h-4Jj-19@gated-at.bofh.it>
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Hi!

> > I'd like to get detection of headset button presses to work in recent
> > kernels, but could not figure it out :-(.
> > 
> My vague memory doesn't tell how basic button press detection was
> implemented in Maemo kernel. Was it codec, same voltage detection
> circuit than ECI or some another GPIO? I don't even remember did we
> implement it for the MeeGo N900 developer edition :-(

Another GPIO, as far as I can tell. There was some delay logic in 2.6
kernel (it removed false events happening when jack was inserted),
other that that it should be quite simple. (But I did not yet figure
it out in 4.x kernel).

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

Thread

Nokia N900 sound driver and ECI GPIOs Pali Rohár <pali.rohar@gmail.com> - 2017-01-01 21:00 +0100
  Re: Nokia N900 sound driver and ECI GPIOs Pavel Machek <pavel@ucw.cz> - 2017-01-01 23:40 +0100
    Re: Nokia N900 sound driver and ECI GPIOs Peter Ujfalusi <peter.ujfalusi@ti.com> - 2017-01-02 09:40 +0100
      Re: Nokia N900 sound driver and ECI GPIOs Pali Rohár <pali.rohar@gmail.com> - 2017-01-02 10:00 +0100
        Re: Nokia N900 sound driver and ECI GPIOs Pali Rohár <pali.rohar@gmail.com> - 2017-01-02 14:00 +0100
          Re: Nokia N900 sound driver and ECI GPIOs Peter Ujfalusi <peter.ujfalusi@ti.com> - 2017-01-02 15:40 +0100
            Re: Nokia N900 sound driver and ECI GPIOs joerg Reisenweber <joerg@openmoko.org> - 2017-01-02 17:00 +0100
            Re: Nokia N900 sound driver and ECI GPIOs Pali Rohár <pali.rohar@gmail.com> - 2017-01-02 18:10 +0100
        Re: Nokia N900 sound driver and ECI GPIOs Peter Ujfalusi <peter.ujfalusi@ti.com> - 2017-01-02 14:00 +0100
        Re: Nokia N900 sound driver and ECI GPIOs joerg Reisenweber <joerg@openmoko.org> - 2017-01-02 17:40 +0100
    Re: Nokia N900 sound driver and ECI GPIOs Pali Rohár <pali.rohar@gmail.com> - 2017-01-02 10:30 +0100
    Re: Nokia N900 sound driver and ECI GPIOs Jarkko Nikula <jarkko.nikula@bitmer.com> - 2017-01-02 10:40 +0100
      Re: Nokia N900 sound driver and ECI GPIOs Pavel Machek <pavel@ucw.cz> - 2017-01-02 10:40 +0100
      Re: Nokia N900 sound driver and ECI GPIOs joerg Reisenweber <joerg@openmoko.org> - 2017-01-02 17:10 +0100
  Re: Nokia N900 sound driver and ECI GPIOs Peter Ujfalusi <peter.ujfalusi@ti.com> - 2017-01-02 09:30 +0100
    Re: Nokia N900 sound driver and ECI GPIOs Pali Rohár <pali.rohar@gmail.com> - 2017-01-02 09:50 +0100
      Re: Nokia N900 sound driver and ECI GPIOs Aaro Koskinen <aaro.koskinen@iki.fi> - 2017-01-02 20:00 +0100
        Re: Nokia N900 sound driver and ECI GPIOs Pali Rohár <pali.rohar@gmail.com> - 2017-01-02 21:10 +0100
          Re: Nokia N900 sound driver and ECI GPIOs joerg Reisenweber <joerg@openmoko.org> - 2017-01-02 22:10 +0100

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