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Groups > linux.kernel > #1266605

[RFC 0/4] IIO: add support for INA2xx power monitor

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This chip has fair support in the hwmon stack already, this work is more
as a pathfinder for me, hence I post it as RFC to digg some more into 'does
and donts' with IIO.

Nevertheless, it provides a working streaming scheme for capturing
power/voltage/current with this chip. It works in local and remote
mode with iio_readdev and I did some sniffing tests with iio-oscilloscope
with promising results inspite of timeout issues for long temporal buffers
presumably due to the slow rates for this chip compared to expected high-speed
CoDecs (and maybe the lack of a proper plugin?).

The kthread I'm using does an active waiting to allow for sampling periods
shorter than a tick. I have not experienced performance issues with it on
the board (BeagleBoneBlack), IIOD could always schedule on time as far as I
could see, maybe with other i2c backends a schedule() could be mandatory ?

Many thanks,

Marc Titinger (4):
  iio: ina2xx: add direct IO support for TI INA2xx Power Monitors
  iio: ina2xx: add SAMP_FREQ attribute.
  iio: ina2xx: add debugfs reg access
  iio: ina2xx: add SOFTWARE buffer mode using an iio kfifo.

 drivers/iio/adc/Kconfig      |  11 +
 drivers/iio/adc/Makefile     |   1 +
 drivers/iio/adc/ina2xx-iio.c | 579 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 591 insertions(+)
 create mode 100644 drivers/iio/adc/ina2xx-iio.c

-- 
1.9.1

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[RFC 0/4] IIO: add support for INA2xx power monitor Marc Titinger <mtitinger@baylibre.com> - 2015-11-10 17:10 +0100
  [RFC 1/4] iio: ina2xx: add direct IO support for TI INA2xx Power Monitors Marc Titinger <mtitinger@baylibre.com> - 2015-11-10 17:10 +0100
    Re: [RFC 1/4] iio: ina2xx: add direct IO support for TI INA2xx Power Monitors Daniel Baluta <daniel.baluta@gmail.com> - 2015-11-11 11:20 +0100
      Re: [RFC 1/4] iio: ina2xx: add direct IO support for TI INA2xx Power  Monitors Marc Titinger <mtitinger@baylibre.com> - 2015-11-12 10:30 +0100
    Re: [RFC 1/4] iio: ina2xx: add direct IO support for TI INA2xx Power Monitors Daniel Baluta <daniel.baluta@gmail.com> - 2015-11-11 13:20 +0100
      Re: [RFC 1/4] iio: ina2xx: add direct IO support for TI INA2xx Power  Monitors Marc Titinger <mtitinger@baylibre.com> - 2015-11-12 10:40 +0100
      [RFC v2 1/2] iio: ina2xx: add direct IO support for TI INA2xx Power Monitors Marc Titinger <mtitinger@baylibre.com> - 2015-11-12 14:00 +0100
        [RFC v2 2/2] iio: ina2xx: add SOFTWARE buffer mode using an iio kfifo. Marc Titinger <mtitinger@baylibre.com> - 2015-11-12 14:00 +0100
        Re: [RFC v2 1/2] iio: ina2xx: add direct IO support for TI INA2xx  Power Monitors Jonathan Cameron <jic23@kernel.org> - 2015-11-14 20:10 +0100
          Re: [RFC v2 1/2] iio: ina2xx: add direct IO support for TI INA2xx  Power Monitors Marc Titinger <mtitinger@baylibre.com> - 2015-11-16 10:40 +0100
  [RFC 4/4] iio: ina2xx: add SOFTWARE buffer mode using an iio kfifo. Marc Titinger <mtitinger@baylibre.com> - 2015-11-10 17:10 +0100
    Re: [RFC 4/4] iio: ina2xx: add SOFTWARE buffer mode using an iio  kfifo. Lars-Peter Clausen <lars@metafoo.de> - 2015-11-10 19:30 +0100
      Re: [RFC 4/4] iio: ina2xx: add SOFTWARE buffer mode using an iio  kfifo. Marc Titinger <mtitinger@baylibre.com> - 2015-11-12 11:20 +0100
        Re: [RFC 4/4] iio: ina2xx: add SOFTWARE buffer mode using an iio  kfifo. Lars-Peter Clausen <lars@metafoo.de> - 2015-11-12 11:30 +0100
        Re: [RFC 4/4] iio: ina2xx: add SOFTWARE buffer mode using an iio  kfifo. Jonathan Cameron <jic23@kernel.org> - 2015-11-14 19:50 +0100
          Re: [RFC 4/4] iio: ina2xx: add SOFTWARE buffer mode using an iio  kfifo. Marc Titinger <mtitinger@baylibre.com> - 2015-11-16 10:40 +0100
  [RFC 2/4] iio: ina2xx: add SAMP_FREQ attribute. Marc Titinger <mtitinger@baylibre.com> - 2015-11-10 17:10 +0100
    Re: [RFC 2/4] iio: ina2xx: add SAMP_FREQ attribute. Daniel Baluta <daniel.baluta@gmail.com> - 2015-11-11 11:20 +0100

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