Commit df94aba8 authored by Jonathan Cameron's avatar Jonathan Cameron Committed by Greg Kroah-Hartman
Browse files

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



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: default avatarJonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 0389245f

drivers/staging/iio/iio.h

+7 −0
Original line number Diff line number Diff line
@@ -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,

drivers/staging/iio/industrialio-core.c

+2 −0
Original line number Diff line number Diff line
@@ -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",

};



/**

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