iio: adc: ad7124: add 3db filter

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This patch adds the LOW_PASS_FILTER_3DB_FREQUENCY attribute
in iio_chan_spec for each channel. The used filters are sinc3
or sinc4. The filter type with the highest output data rate
is used when setting a low pass frequency in the channel's sysfs.

Signed-off-by: Alexandru Tachici <alexandru.tachici@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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Alexandru Tachici 2020-01-22 10:54:14 +02:00 • committed by Jonathan Cameron

parent ebf7a11267

commit cef2760954

1 changed files with 68 additions and 1 deletions

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drivers/iio/adc/ad7124.c

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