diff options
Diffstat (limited to 'drivers/staging/iio/iio.h')
| -rw-r--r-- | drivers/staging/iio/iio.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/staging/iio/iio.h b/drivers/staging/iio/iio.h index 9459c17dee48..b9bce9aeb19e 100644 --- a/drivers/staging/iio/iio.h +++ b/drivers/staging/iio/iio.h @@ -88,6 +88,25 @@ enum iio_endian { IIO_LE, }; +struct iio_chan_spec; +struct iio_dev; + +/** + * struct iio_chan_spec_ext_info - Extended channel info attribute + * @name: Info attribute name + * @shared: Whether this attribute is shared between all channels. + * @read: Read callback for this info attribute, may be NULL. + * @write: Write callback for this info attribute, may be NULL. + */ +struct iio_chan_spec_ext_info { + const char *name; + bool shared; + ssize_t (*read)(struct iio_dev *, struct iio_chan_spec const *, + char *buf); + ssize_t (*write)(struct iio_dev *, struct iio_chan_spec const *, + const char *buf, size_t len); +}; + /** * struct iio_chan_spec - specification of a single channel * @type: What type of measurement is the channel making. @@ -107,6 +126,9 @@ enum iio_endian { * @info_mask: What information is to be exported about this channel. * This includes calibbias, scale etc. * @event_mask: What events can this channel produce. + * @ext_info: Array of extended info attributes for this channel. + * The array is NULL terminated, the last element should + * have it's 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. @@ -141,6 +163,7 @@ struct iio_chan_spec { } scan_type; long info_mask; long event_mask; + const struct iio_chan_spec_ext_info *ext_info; char *extend_name; const char *datasheet_name; unsigned processed_val:1; |