[PATCH v2 0/5] iio: humidity: hts221: update probe and logging implementations

HTS221 is an older driver. This series groups a few small modernizations
based on current development practices.

- Report available values via read_avail()
- Add a blank line after variable declarations (style)
- Allow unknown whoami for DT fallback instead of erroring out
- Use dev_err_probe() in probe paths
- Reject calibration data that would cause division by zero

No HTS221 hardware was available. Verified with checkpatch --strict and
builds of hts221, hts221_i2c and hts221_spi. Probe and calibration
error paths were exercised against i2c-stub with register contents
pre-loaded via i2cset.

---
Changes in v2:
- Use a local 'dev' pointer instead of hw->dev in error logging helpers
- Fix punctuation in the commit message of patch 2/5
- Adjust commit message for patch 1/5 to include fixes due to ABI change 
of in_humidityrelative_oversampling_ratio_available

v1: https://lore.kernel.org/all/[email protected]/

Thanks to the reviewers for all the time you spent going through the
code and the comments.

Adi Nata (5):
  iio: humidity: hts221: report available values via read_avail()
  iio: humidity: hts221: Add a blank line after variable declarations
  iio: humidity: hts221: Allow unknown whoami for DT fallback
  iio: humidity: hts221: use dev_err_probe() in probe paths
  iio: humidity: hts221: fix division by zero in calibration parsing

 drivers/iio/humidity/hts221_buffer.c |   1 +
 drivers/iio/humidity/hts221_core.c   | 168 ++++++++++++---------------
 drivers/iio/humidity/hts221_i2c.c    |  11 +-
 drivers/iio/humidity/hts221_spi.c    |  11 +-
 4 files changed, 84 insertions(+), 107 deletions(-)

-- 
2.47.3