[PATCH v5 0/4] hwmon: (pmbus/ltc2978) Add regulator ops

["Mårten Lindahl" <marten.lindahl@axis.com>]

Hi!

The LTC2978 driver supports a wide range of power regulator chips, but it
has limited functionality for using it in a dynamic regulator framework.
Since standard functions for setting and getting voltage are missing as
pmbus core operations this patchset adds it.

These patches have been tested on an ARTPEC-8 developer board with a group
of LTC2977 power regulators.

Kind regards
Mårten Lindahl

Changes in v2:
 - Add pmbus core _pmbus_write_byte_data to check for driver specific callback
 - Change pmbus_update_byte_data to use _pmbus_read/write_byte_data
 - Change pmbus_regulator_is_enabled to use _pmbus_read_byte_data
 - Export pmbus core functions enable/disable/is_enabled

Changes in v3:
 - Split patch "hwmon: (pmbus/ltc2978) Use driver specific ops if they exist"
   into two patches: (1) pmbus core, (2) ltc2978.
 - Move ltc2978_regulator_get/set_voltage functions to pmbus core.

Changes in v4:
 - Split (and rename) patch "hwmon: (pmbus) Use driver specific ops if they exist"
   into two patches where the first handle _pmbus_write_byte_data, and the
   second handle _pmbus_read_byte_data.
 - Use voltage conversion functions in pmbus_regulator_get/set_voltage.

Changes in v5:
 - Remove PMBUS_VOUT_COMMAND voltage attribute added in v4 and use local
   sensor object for conversion.
 - Try to read MFR_VOUT_MIN and MFR_VOUT_MAX first, or else VOUT_MARGIN_LOW and
   VOUT_MARGIN_HIGH, to get voltage window.

Mårten Lindahl (4):
  hwmon: (pmbus) Introduce and use write_byte_data callback
  hwmon: (pmbus) Use _pmbus_read_byte_data with callback
  hwmon: (pmbus/ltc2978) Add chip specific write_byte_data
  hwmon: (pmbus) Add get_voltage/set_voltage ops

 drivers/hwmon/pmbus/ltc2978.c    |  12 +++
 drivers/hwmon/pmbus/pmbus.h      |   2 +
 drivers/hwmon/pmbus/pmbus_core.c | 133 +++++++++++++++++++++++++------
 3 files changed, 121 insertions(+), 26 deletions(-)

-- 
2.30.2