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Re: Nokia N900 - audio TPA6130A2 problems

From Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
Newsgroups linux.kernel
Subject Re: Nokia N900 - audio TPA6130A2 problems
Date 2016-03-17 15:00 +0100
Message-ID <rdGD0-87J-1@gated-at.bofh.it> (permalink)
References (6 earlier) <rduit-8ly-7@gated-at.bofh.it> <rdB0C-4pn-15@gated-at.bofh.it> <rdFQD-7QE-31@gated-at.bofh.it> <rdG0i-7TR-9@gated-at.bofh.it> <rdGjE-80w-19@gated-at.bofh.it>
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Hi,

On 17.03.2016 15:33, Tony Lindgren wrote:
>
> Check the schematics. If the hardware has external pull-ups on a
> line then don't enable the internal pull-ups. Otherwise both the
> external and intenal pulls are parallel the pull value will be
> wrong. My guess is that on n900 all the i2c lines have external
> pulls.

There are, 1k connected to VIO_18, but still, stock Nokia kernel enables 
the internal pull-ups as well. I doubt Nokia devs did that by mistake. 
Could it be that VIO_18 is disabled by the time  TPA6130A2 is probed?

Also, what is the problem to have both internal and external pull-ups in 
parallel?

Regards,
Ivo

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Thread

Re: Nokia N900 - audio TPA6130A2 problems Sebastian Reichel <sre@kernel.org> - 2016-03-06 16:30 +0100
  Re: Nokia N900 - audio TPA6130A2 problems Pali Rohár <pali.rohar@gmail.com> - 2016-03-07 13:00 +0100
    Re: Nokia N900 - audio TPA6130A2 problems Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> - 2016-03-08 07:50 +0100
      Re: Nokia N900 - audio TPA6130A2 problems Pali Rohár <pali.rohar@gmail.com> - 2016-03-12 13:50 +0100
  Re: Nokia N900 - audio TPA6130A2 problems Pali Rohár <pali.rohar@gmail.com> - 2016-03-12 13:50 +0100
    Re: Nokia N900 - audio TPA6130A2 problems Peter Ujfalusi <peter.ujfalusi@ti.com> - 2016-03-14 11:10 +0100
      Re: Nokia N900 - audio TPA6130A2 problems Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> - 2016-03-14 18:10 +0100
      Re: Nokia N900 - audio TPA6130A2 problems Pali Rohár <pali.rohar@gmail.com> - 2016-03-16 14:40 +0100
        Re: Nokia N900 - audio TPA6130A2 problems Sebastian Reichel <sre@kernel.org> - 2016-03-16 15:50 +0100
          Re: Nokia N900 - audio TPA6130A2 problems Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> - 2016-03-16 19:30 +0100
            Re: Nokia N900 - audio TPA6130A2 problems Grygorii Strashko <grygorii.strashko@ti.com> - 2016-03-16 19:40 +0100
              Re: Nokia N900 - audio TPA6130A2 problems Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> - 2016-03-16 21:00 +0100
                Re: Nokia N900 - audio TPA6130A2 problems Sebastian Reichel <sre@kernel.org> - 2016-03-17 01:50 +0100
                Re: Nokia N900 - audio TPA6130A2 problems Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> - 2016-03-17 09:00 +0100
                Re: Nokia N900 - audio TPA6130A2 problems Pali Rohár <pali.rohar@gmail.com> - 2016-03-17 14:10 +0100
                Re: Nokia N900 - audio TPA6130A2 problems Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> - 2016-03-17 14:20 +0100
                Re: Nokia N900 - audio TPA6130A2 problems Tony Lindgren <tony@atomide.com> - 2016-03-17 14:40 +0100
                Re: Nokia N900 - audio TPA6130A2 problems Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> - 2016-03-17 15:00 +0100
                Re: Nokia N900 - audio TPA6130A2 problems Tony Lindgren <tony@atomide.com> - 2016-03-17 15:40 +0100
                Re: Nokia N900 - audio TPA6130A2 problems Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> - 2016-03-17 16:00 +0100
                Re: Nokia N900 - audio TPA6130A2 problems Peter Ujfalusi <peter.ujfalusi@ti.com> - 2016-03-17 09:00 +0100
                Re: Nokia N900 - audio TPA6130A2 problems Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> - 2016-03-17 18:30 +0100
                Re: Nokia N900 - audio TPA6130A2 problems Peter Ujfalusi <peter.ujfalusi@ti.com> - 2016-03-18 11:40 +0100
                Re: Nokia N900 - audio TPA6130A2 problems Ивайло Димитров   <ivo.g.dimitrov.75@gmail.com> - 2016-03-18 14:20 +0100
                Re: Nokia N900 - audio TPA6130A2 problems Sebastian Reichel <sre@kernel.org> - 2016-03-18 14:40 +0100
                Re: Nokia N900 - audio TPA6130A2 problems Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> - 2016-03-18 14:50 +0100
                Re: Nokia N900 - audio TPA6130A2 problems Sebastian Reichel <sre@kernel.org> - 2016-03-18 16:10 +0100
                Re: Nokia N900 - audio TPA6130A2 problems Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> - 2016-03-18 17:00 +0100
                Re: Nokia N900 - audio TPA6130A2 problems Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> - 2016-03-19 10:00 +0100
                Re: Nokia N900 - audio TPA6130A2 problems Sebastian Reichel <sre@kernel.org> - 2016-03-20 06:20 +0100
                Re: Nokia N900 - audio TPA6130A2 problems Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> - 2016-03-20 20:50 +0100
                Re: Nokia N900 - audio TPA6130A2 problems Sebastian Reichel <sre@kernel.org> - 2016-03-21 01:10 +0100
                Re: Nokia N900 - audio TPA6130A2 problems Sebastian Reichel <sre@kernel.org> - 2016-03-21 02:50 +0100
                Re: Nokia N900 - audio TPA6130A2 problems Mark Brown <broonie@kernel.org> - 2016-03-21 13:10 +0100
                Re: Nokia N900 - audio TPA6130A2 problems Mark Brown <broonie@kernel.org> - 2016-03-21 12:50 +0100
                Re: Nokia N900 - audio TPA6130A2 problems Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> - 2016-03-21 14:40 +0100
                Re: Nokia N900 - audio TPA6130A2 problems Mark Brown <broonie@kernel.org> - 2016-03-21 14:50 +0100
                Re: Nokia N900 - audio TPA6130A2 problems Sebastian Reichel <sre@kernel.org> - 2016-03-21 16:00 +0100
                Re: Nokia N900 - audio TPA6130A2 problems Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> - 2016-03-21 20:40 +0100
                Re: Nokia N900 - audio TPA6130A2 problems Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> - 2016-03-22 09:10 +0100
          Race condition in TPA6130A2 (Was: Re: Nokia N900 - audio TPA6130A2  problems) Pali Rohár <pali.rohar@gmail.com> - 2016-04-01 12:50 +0200

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