Re: [PATCH 2/2] iio: misc: add support for GPIO power switches

From	Sebastian Reichel <sre@kernel.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH 2/2] iio: misc: add support for GPIO power switches
Date	2016-12-29 17:30 +0100
Message-ID	<sTLKy-tS-9@gated-at.bofh.it> (permalink)
References	<sNkN3-4IE-7@gated-at.bofh.it> <sNkN3-4IE-5@gated-at.bofh.it> <sTlZL-8ke-3@gated-at.bofh.it>
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Hi Linux,

On Wed, Dec 28, 2016 at 01:50:17PM +0100, Linus Walleij wrote:
> On Sun, Dec 11, 2016 at 11:21 PM, Bartosz Golaszewski
> <bgolaszewski@baylibre.com> wrote:
> 
> > Some power-measuring ADCs work together with power load switches which
> > allow to power-cycle measured devices.
> >
> > An example use case would be measuring the power consumption of a
> > development board during boot using a power monitor such as TI INA226
> > and power-cycling the board remotely using a TPS229* power switch.
> >
> > Add an iio driver for simple GPIO power switches and expose a sysfs
> > attribute allowing to toggle their state.
> >
> > Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
> 
> I don't get this, isn't this doing the same as
> drivers/power/reset/gpio-poweroff.c
> ?
> 
> With the only difference that the latter uses the standard syscall
> from pm_power_off to reboot the system instead of some random
> sysfs file.

As far as I understand it, the TPS229 is used by Barzosz to poweroff
a remote system. The gpio-poweroff driver is used to poweroff the
local system.

-- Sebastian

Thread

[PATCH 2/2] iio: misc: add support for GPIO power switches Bartosz Golaszewski <bgolaszewski@baylibre.com> - 2016-12-11 23:30 +0100
  Re: [PATCH 2/2] iio: misc: add support for GPIO power switches Linus Walleij <linus.walleij@linaro.org> - 2016-12-28 14:00 +0100
    Re: [PATCH 2/2] iio: misc: add support for GPIO power switches Sebastian Reichel <sre@kernel.org> - 2016-12-29 17:30 +0100
      Re: [PATCH 2/2] iio: misc: add support for GPIO power switches Linus Walleij <linus.walleij@linaro.org> - 2016-12-30 14:10 +0100
        Re: [PATCH 2/2] iio: misc: add support for GPIO power switches Jonathan Cameron <jic23@kernel.org> - 2016-12-30 16:20 +0100
          Re: [PATCH 2/2] iio: misc: add support for GPIO power switches Linus Walleij <linus.walleij@linaro.org> - 2017-01-02 23:00 +0100

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