[PATCH v6 0/3] Rework TPS25990 direct conversions and add TPS1689 support

[Stoyan Bogdanov <sbogdanov@baylibre.com>]

This series reworks the TPS25990 PMBus driver and adds TPS1689 support.
Both devices share most internal functionality, differing mainly in
supported voltage and current operating ranges.

Link to V5 at [3]

v6:
- Remove special-case conditioning for IIN_OCF so both TPS25990 and
  TPS1689 use the same logic.
- Add scaling for TPS1689 VIN_OV_FAULT according to the datasheet
  VIN_OV_FLT table, keep the existing behavior for TPS25990.
- Fix incorrect PMBus Direct format conversion coefficients (m, b, R)
  for TPS1689 PSC_VOLTAGE_IN in struct pmbus_driver_info.
- Add missing PMBUS_HAVE_IOUT flag in pmbus_driver_info .func for TPS1689
- Restore the const qualifier on struct pmbus_driver_info, which was
  removed unintentionally.
- Update i2c_device_id to follow I2C subsystem coding style by using the
  .name and .driver_data initializers.

Link to V4 at [2]

v5:
- Simplify implementation and remove calculations from the driver, as
  they are not needed and were implemented incorrectly. Thanks Guenter
  for taking the time to explain.
- Drop pmbus API changes, as they are not actually needed.
- Add conditioning to separate TPS1689 and TPS25990 by chip_id in
  tps25990_read_word_data() and tps25990_write_word_data() for
  PMBUS_VIN_OV_FAULT_LIMIT and PMBUS_IIN_OC_FAULT_LIMIT. The TPS1689
  value is not 4-bit, so it does not need adjusting. Keep the current
  adjustment logic only for TPS25990.

Link to V3 at [1]

v4:
- Fix non-devicetree support as reported by Guenter Roeck
- Rework direct conversion handling to use exported PMBus core helpers
  instead of driver-local implementations
- Update dt-bindings commit message and ti,tps25990.yaml
- Clarify commit messages to better reflect the final implementation
- Add and export direct conversion helpers from pmbus_core
- Eliminate duplicated conversion code in the driver

V3:
- Fix error detected from kernel test bot regarding division

Tests:
- Test builds for x86_64, arm64, i386
- Retest driver on arm64
- Validate driver direct conversion functions manualy

V2:
- Fix error detected from kernel test bot
- Add Acked-by to dt-bindings commit
- Drop "support" from dt-bindings commit subject

[1] https://lore.kernel.org/all/20260217081203.1792025-1-sbogdanov@baylibre.com/
[2] https://lore.kernel.org/all/20260522082349.2749970-1-sbogdanov@baylibre.com/
[3] https://lore.kernel.org/all/20260728015857.193890-1-sbogdanov@baylibre.com/

Stoyan Bogdanov (3):
  hwmon: (pmbus/tps25990): Rework driver for multi-device support
  dt-bindings: hwmon: pmbus/tps25990: Add TPS1689
  hwmon: (pmbus/tps25990): Add TPS1689 support

 .../bindings/hwmon/pmbus/ti,tps25990.yaml     |   8 +-
 Documentation/hwmon/tps25990.rst              |  15 +-
 drivers/hwmon/pmbus/tps25990.c                | 227 +++++++++++++-----
 3 files changed, 181 insertions(+), 69 deletions(-)

-- 
2.43.0