staging: iio: cdc: ad7746: Switch from _offset to _zeropoint for differential channels.

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As this offset is applied equally to both lines of the differential
pair, _ofset should not be used. Use the new ABI _zeropoint instead
to avoid userspace software applying this value when calculating
real value = (_raw + _offset) * _scale

Also add a comment to explain why an offset of 0x800000 is applied
within the driver rather than exposed to userspace.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20220626122938.582107-13-jic23@kernel.org

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Jonathan Cameron 2022-06-26 13:29:33 +01:00

parent 5c64990b99

commit 2d72ead25a

1 changed files with 8 additions and 2 deletions

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drivers/staging/iio/cdc/ad7746.c

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