IIO: Refactor info_mask* and ext_info handling and introduce info_mask_shared_[by_all/by_type]

Changes since V2.
1) Fixed formatting in the iio_shared_by enum definition as pointed out by Lars.

Changes since V1.
1) Deal with ext_info as well as the info_mask.
In the previous set things sort of worked by coincidence of the ordering in the enum. This version handles this cleanly.
2) Dropped the bonus const in tmp006.

Original message :

This series first performs a bit of refactoring of the core handling of info_mask_separate and info_mask_shared_by_type.

Next we introduce info_mask_shared_by_dir and info_mask_shared_by_all to allow for attributes of the form

in_sampling_frequency or sampling_frequency as appropriate.

Most existing drivers will make no use of the shared_by_dir case, but it is there to handle devices with both and input and output channels.

There are two main reasons for adding these two cases.
1) Should result in shorter code, particularly for complex drivers.
2) Allows for in kernel consumers accessing this functionality.

The intent is to follow this series with one providing a standard way of providing 'available' attributes. The combination of the two should mean that very few things are still handled via direct registration of attributes.

Thanks,

Jonathan

Jonathan Cameron (5):
iio: drop info_mask from struct iio_dev
iio: refactor info mask and ext_info attribute creation.
iio: add info_mask_[shared_by_dir/shared_by_all] staging:iio: dummy driver additions to show shared_by_dir infomask
usage
iio:temperature:tmp006 put sampling_frequency in
info_mask_shared_by_all

 drivers/iio/dac/ad5064.c               |   3 +-
 drivers/iio/dac/ad5380.c               |   4 +-
 drivers/iio/dac/ad5446.c               |   3 +-
 drivers/iio/dac/ad5504.c               |   4 +-
 drivers/iio/dac/ad5624r_spi.c          |   4 +-
 drivers/iio/dac/ad5686.c               |   3 +-
 drivers/iio/dac/ad5755.c               |   1 +
 drivers/iio/dac/ad5791.c               |   5 +-
 drivers/iio/dac/ad7303.c               |   1 +
 drivers/iio/dac/mcp4725.c              |   3 +-
 drivers/iio/frequency/adf4350.c        |   1 +
 drivers/iio/iio_core.h                 |   2 +-
 drivers/iio/industrialio-buffer.c      |   2 +-
 drivers/iio/industrialio-core.c        | 179 ++++++++++++++++++++-------------
 drivers/iio/temperature/tmp006.c       |  57 +++++------
 drivers/staging/iio/iio_simple_dummy.c |  16 +++
 include/linux/iio/iio.h                |  26 +++--
 17 files changed, 197 insertions(+), 117 deletions(-)

1.8.4