STRUCT IIO_CHAN_SPEC(9)                Industrial I/O core                STRUCT IIO_CHAN_SPEC(9)



NAME
       struct_iio_chan_spec - specification of a single channel

SYNOPSIS
       struct iio_chan_spec {
         enum iio_chan_type type;
         int channel;
         int channel2;
         unsigned long address;
         int scan_index;
         struct scan_type;
         long info_mask_separate;
         long info_mask_shared_by_type;
         long info_mask_shared_by_dir;
         long info_mask_shared_by_all;
         const struct iio_event_spec * event_spec;
         unsigned int num_event_specs;
         const struct iio_chan_spec_ext_info * ext_info;
         const char * extend_name;
         const char * datasheet_name;
         unsigned modified:1;
         unsigned indexed:1;
         unsigned output:1;
         unsigned differential:1;
       };

MEMBERS
       type
           What type of measurement is the channel making.

       channel
           What number do we wish to assign the channel.

       channel2
           If there is a second number for a differential channel then this is it. If modified is
           set then the value here specifies the modifier.

       address
           Driver specific identifier.

       scan_index
           Monotonic index to give ordering in scans when read from a buffer.

       scan_type
           sign: 's' or 'u' to specify signed or unsigned realbits: Number of valid bits of data
           storagebits: Realbits + padding shift: Shift right by this before masking out
           realbits. repeat: Number of times real/storage bits repeats. When the repeat element
           is more than 1, then the type element in sysfs will show a repeat value. Otherwise,
           the number of repetitions is omitted. endianness: little or big endian

       info_mask_separate
           What information is to be exported that is specific to this channel.

       info_mask_shared_by_type
           What information is to be exported that is shared by all channels of the same type.

       info_mask_shared_by_dir
           What information is to be exported that is shared by all channels of the same
           direction.

       info_mask_shared_by_all
           What information is to be exported that is shared by all channels.

       event_spec
           Array of events which should be registered for this channel.

       num_event_specs
           Size of the event_spec array.

       ext_info
           Array of extended info attributes for this channel. The array is NULL terminated, the
           last element should have its name field set to NULL.

       extend_name
           Allows labeling of channel attributes with an informative name. Note this has no
           effect codes etc, unlike modifiers.

       datasheet_name
           A name used in in-kernel mapping of channels. It should correspond to the first name
           that the channel is referred to by in the datasheet (e.g. IND), or the nearest
           possible compound name (e.g. IND-INC).

       modified
           Does a modifier apply to this channel. What these are depends on the channel type.
           Modifier is set in channel2. Examples are IIO_MOD_X for axial sensors about the 'x'
           axis.

       indexed
           Specify the channel has a numerical index. If not, the channel index number will be
           suppressed for sysfs attributes but not for event codes.

       output
           Channel is output.

       differential
           Channel is differential.

AUTHOR
       Daniel Baluta <daniel.baluta AT intel.com>
           Author.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                   STRUCT IIO_CHAN_SPEC(9)