following RFC started in https://lkml.org/lkml/2015/11/10/370 and feed back from https://lkml.org/lkml/2015/11/18/395 * squash to a single patch that provides DIRECT and SOFTWARE buffer mode. * implement INFO_INT_TIME abi for each adc in order to better match how the chip works. This also allows to compute the actual sample freq for INFO_SAMP_FREQ, that results from both the averaging ratio and the possible integration times. * Add an INT_TIME setting for each voltage ADC (default values are compa -tible for previous implementations). * provide the averaging feature of the chip using the OVERSAMPLING_RATIO abi. * by default, only issue a new sample value in the buffer when the Conversion Ready Flag indicates that a new value is available. The capture thread polls slightly faster than the chip-internal sampling clock to prevent re-read or skipping of samples. * Since this check for CVRF has its cost (i2c xfer), allow for a relaxed mode for when re-read or skipping or one sample is not big deal, but a faster sampling rate is wanted. * remove the calibration INFO, since the driver sets a hardcoded value for 'Current_LSB', only RShunt is available as a parameter. No use to expose the register to the user. Why two drivers (hwmon and IIO) for this device ? ------------------------------------------------ * Hwmon and IIO do not address exactly the same use-cases, while this chip can (and is) being used either as a power monitoring feature of a host device or as sensor to measure power properties of a target DUT. * In the second use-case (probing a DUT) we wish to plot measurements over time, display transients, peak values, compute derived metrics (like energy). A buffer streaming scheme and remote capabilities with libiio seems beneficial. Marc Titinger (1): iio: ina2xx: add support for TI INA2xx Power Monitors iio: ina2xx: provide a sysfs parameter to allow async readout of the ADCs drivers/iio/adc/Kconfig | 10 + drivers/iio/adc/Makefile | 1 + drivers/iio/adc/ina2xx-iio.c | 720 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 731 insertions(+) create mode 100644 drivers/iio/adc/ina2xx-iio.c -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
