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| author | Chuang Zhu <git@chuang.cz> | 2026-03-16 02:23:04 +0800 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2026-03-21 19:44:15 +0000 |
| commit | 733bcf18eab0cbcea7b1a85c967dc100945fffc3 (patch) | |
| tree | 3d7927b242a17926885f370e8b424f1a04ea5d46 /kernel/workqueue.c | |
| parent | 54dde4b1ed85a60ce1bcd10cc6783b9a33ea78e3 (diff) | |
iio: adc: ina2xx: add INA236 support
The calibration divisor is not directly specified in the datasheet, but can be calculated:
I = Current_LSB * Current
Current = ShuntVoltage * CAL / calibration_divisor
CAL = 0.00512 / (Current_LSB * Rshunt)
ShuntVoltage = Vshunt / ShuntVoltage_LSB
=> I = (0.00512 / (calibration_divisor*ShuntVoltage_LSB)) * (Vshunt / Rshunt)
Ohm's law, I = Vshunt / Rshunt
=> 0.00512 / (calibration_divisor*ShuntVoltage_LSB) = 1
ShuntVoltage_LSB = 2.5 uV = 0.0000025 V
=> calibration_divisor = 2048
Signed-off-by: Chuang Zhu <git@chuang.cz>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'kernel/workqueue.c')
0 files changed, 0 insertions, 0 deletions