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hwmon: (ina3221) Add averaging mode support

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The CONFIG register has a 3-bit averaging mode field for users
to setup the number of samples that are collected and averaged
together. This is very useful to filter noise from sensor data.

This patch adds a 'samples' sysfs node using hwmon_chip_samples
of hwmon core, and updates wait time calculation by taking this
samples value into account.

Signed-off-by: Nicolin Chen <[email protected]>
Signed-off-by: Guenter Roeck <[email protected]>
This commit is contained in:
Nicolin Chen 2019-04-16 12:41:31 -07:00 • committed by Guenter Roeck
commit 5c090abf94
2 changed files with 69 additions and 1 deletions
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Documentation/hwmon/ina3221
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@ -35,3 +35,6 @@ 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
samples Number of samples using in the averaging mode.
Supports the list of number of samples:
1, 4, 16, 64, 128, 256, 512, 1024