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| author |   Nicolin Chen <nicoleotsuka@gmail.com> | 2019-10-16 16:57:02 -0700 |
|---|---|---|
| committer |   Guenter Roeck <linux@roeck-us.net> | 2019-11-06 14:37:19 -0800 |
| commit | 2057bdfb7184e9833182bf9ffcb234988f545f41 (patch) | |
| tree | 1798aaf1fe24e8b6b4875747e5578953cd278cc1 /Documentation/hwmon/ina3221.rst | |
| parent | hwmon: (tmp421) Allow reading at 2Hz instead of 0.5Hz (diff) | |
| download | linux-dev-2057bdfb7184e9833182bf9ffcb234988f545f41.tar.xz linux-dev-2057bdfb7184e9833182bf9ffcb234988f545f41.zip | |
hwmon: (ina3221) Add summation feature support
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>
Diffstat (limited to '')
| -rw-r--r-- | Documentation/hwmon/ina3221.rst | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/hwmon/ina3221.rst b/Documentation/hwmon/ina3221.rst index f6007ae8f4e2..297f7323b441 100644 --- a/Documentation/hwmon/ina3221.rst +++ b/Documentation/hwmon/ina3221.rst @@ -41,6 +41,18 @@ curr[123]_max Warning alert current(mA) setting, activates the average is above this value. curr[123]_max_alarm Warning alert current limit exceeded in[456]_input Shunt voltage(uV) for channels 1, 2, and 3 respectively +in7_input Sum of shunt voltage(uV) channels +in7_label Channel label for sum of shunt voltage +curr4_input Sum of current(mA) measurement channels, + (only available when all channels use the same resistor + value for their shunt resistors) +curr4_crit Critical alert current(mA) setting for sum of current + measurements, activates the corresponding alarm + when the respective current is above this value + (only effective when all channels use the same resistor + value for their shunt resistors) +curr4_crit_alarm Critical alert current limit exceeded for sum of + current measurements. samples Number of samples using in the averaging mode. Supports the list of number of samples: |