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2057bdfb71
This patch implements the summation feature of INA3221, mainly the SCC (enabling) and SF (warning flag) bits of MASK_ENABLE register, INA3221_SHUNT_SUM (summation of shunt voltages) register, and the INA3221_CRIT_SUM (its critical alert setting) register. Although the summation feature allows user to select which channels to be added to the result, as an initial support, this patch simply selects all channels by default, with one only condition: all shunt resistor values need to be the same. This is because the summation of current channels can be only accurately calculated, using shunt voltage sum register, if all shunt resistors are equivalent. Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com> Link: https://lore.kernel.org/r/20191016235702.22039-1-nicoleotsuka@gmail.com [groeck: summation->sum in documentation and label] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Linux kernel
============
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Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
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There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.