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staging:iio: filter description - low pass 3db frequency.

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Introduce the first data filtering related parameter.
For now we are ignoring the filter type and merely specifying its
approximate (I read them off tiny graphs) 3db point.

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Jonathan Cameron 2011-11-27 11:39:12 +00:00 committed by Greg Kroah-Hartman
parent 0389245f0c
commit df94aba81f
2 changed files with 9 additions and 0 deletions
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7
drivers/staging/iio/iio.h
View File

@ -35,6 +35,7 @@ enum iio_chan_info_enum {
IIO_CHAN_INFO_PEAK_SCALE,
IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW,
IIO_CHAN_INFO_AVERAGE_RAW,
IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY,
};
#define IIO_CHAN_INFO_SHARED_BIT(type) BIT(type*2)
@ -74,6 +75,12 @@ enum iio_chan_info_enum {
IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_AVERAGE_RAW)
#define IIO_CHAN_INFO_AVERAGE_RAW_SHARED_BIT \
IIO_CHAN_INFO_SHARED_BIT(IIO_CHAN_INFO_AVERAGE_RAW)
#define IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT \
IIO_CHAN_INFO_SHARED_BIT( \
IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY)
#define IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SEPARATE_BIT \
IIO_CHAN_INFO_SEPARATE_BIT( \
IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY)
enum iio_endian {
IIO_CPU,

2
drivers/staging/iio/industrialio-core.c
View File

@ -85,6 +85,8 @@ static const char * const iio_chan_info_postfix[] = {
[IIO_CHAN_INFO_PEAK_SCALE] = "peak_scale",
[IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW] = "quadrature_correction_raw",
[IIO_CHAN_INFO_AVERAGE_RAW] = "mean_raw",
[IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY]
= "filter_low_pass_3db_frequency",
};
/**