hwmon: (ina2xx) Add support for current limits

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While the chips supported by this driver do not directly support current
limits, they do support setting shunt voltage limits. The shunt voltage
divided by the shunt resistor value is the current. On top of that,
calibration values are set such that in the shunt voltage register and
the current register report the same values. That means we can report and
configure current limits based on shunt voltage limits, and we can do so
with much better accuracy than by setting shunt voltage limits.

Reviewed-by: Tzung-Bi Shih <tzungbi@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

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This commit is contained in:

Guenter Roeck 2024-08-28 15:23:53 -07:00

parent 9965ebd183

commit 4d5c2d9867

2 changed files with 63 additions and 2 deletions

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4

Documentation/hwmon/ina2xx.rst

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61

drivers/hwmon/ina2xx.c

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