iio: humidity: Add support for ENS210 sensor family

This patch series adds support for the
ENS210/ENS210A/ENS211/ENS212/ENS213A/ENS215 temperature and humidity
sensors.

Patch 1 adds the required device tree bindings.

Patch 2 adds the driver, providing the probe and read functions.

Signed-off-by: Joshua Felmeden <jfelmeden@thegoodpenguin.co.uk>
---
changelog v4->v5:
- ens210.c: Updated ens210_data description to reflect values
- ens210.c: Updated dev_err to always use i2c device
- ens210.c: Check T_VALID before returning data
- ens210.c: Fix short linewrap on certain lines
- ens210.c: Added unreachable instead of unreachable return
- ens210.c: Fix sparse warnings
- ens210.c: Remove unneeded i2c_device_id
- ens210.c: Remove unneeded i2c_setclientdata()
- ens210.c: Simply return 'dev_err_probe()' instead of raw error code
- ens210.c: Fix dev_info print type

- Link to v4: https://lore.kernel.org/r/20240719-ens21x-v4-0-6044e48a37...
---
changelog v3->v4:
- rename ens21x.c -> ens210.c
- rename sciosense,ens21x.yaml -> sciosense,ens210.yaml
- General: Changed wildcard ens21x to ens210 to avoid wildcards
- Kconfig: added crc7 as a dependency
- Kconfig: remove extra blank lines
- ens210.c: Moved constants to inline
- ens210.c: Created ens210 chip info to handle chip specific conversion
- ens210.c: Added documentation for mutex
- ens210.c: Fixed sparse complaints from kernel bot
- ens210.c: Changed htonl to cpu_to_be32
- ens210.c: Renamed dev_data -> ens210_data
- ens210.c: changed of_match to i2c
- ens210.c: Added return check for i2c write
- ens210.c: Removed switch for conversion check, use chip_info instead
- ens210.c: Removed unnecessary retry loop
- ens210.c: Convert read to u8[3] type
- ens210.c: Ensure 'correct' path is inline, use early returns to break
    for errors
- ens210.c: Changed mutex to scoped_guard
- ens210.c: Changed part id mismatch to dev_info from dev_err and removed
    return
- ens210.c: Moved name from id->name to chip_info
- ens210.c: Changed data field to be chip_info rather than enum
- ens210.c: Formatting fixes (consistent spacing, extra line break at end
    removed)

- Link to v3: https://lore.kernel.org/r/20240710-ens21x-v3-0-4e3fbcf2a7...
---
changelog v2->v3:
sciosense,ens21x.yaml: Update yaml to match dt_binding_check

- Link to V1: https://lore.kernel.org/all/20240709-ens21x-v1-2-67852143...
- Link to v2: https://lore.kernel.org/r/20240710-ens21x-v2-0-a37c22018b...

Many thanks for the feedback on the driver.
---
changelog v1->v2:
sciosense,ens21x.yaml: Add supply to documentation
sciosense,ens21x.yaml: Add fallback to compatible strings
ens21x.c: Move i2c_device_id next to of_device_id
ens21x.c: Use i2c_of_match_device() instead of of_match_device()

Many thanks for taking the time to review my patch.

Thanks,
Josh

To: Jonathan Cameron <jic23@kernel.org>
To: Lars-Peter Clausen <lars@metafoo.de>
To: Rob Herring <robh@kernel.org>
To: Krzysztof Kozlowski <krzk+dt@kernel.org>
To: Conor Dooley <conor+dt@kernel.org>
To: Joshua Felmeden <jfelmeden@thegoodpenguin.co.uk>
Cc: linux-iio@vger.kernel.org
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
---

---
Joshua Felmeden (2):
      dt-bindings: iio: humidity: add ENS210 sensor family
      iio: humidity: Add support for ENS210

 .../bindings/iio/humidity/sciosense,ens210.yaml    |  55 ++++
 drivers/iio/humidity/Kconfig                       |  11 +
 drivers/iio/humidity/Makefile                      |   1 +
 drivers/iio/humidity/ens210.c                      | 344 +++++++++++++++++++++
 4 files changed, 411 insertions(+)
---
base-commit: 1ebab783647a9e3bf357002d5c4ff060c8474a0a
change-id: 20240709-ens21x-8f2530968f2e

Best regards,
-- 
Joshua Felmeden <jfelmeden@thegoodpenguin.co.uk>