[PATCH v4 0/4] regulator support for pmbus and ltc2978

[atull]

From: Alan Tull <atull@xxxxxxxxxxxxxxxxxxxxx>

This set of patches adds regulator support for pmbus_core.c and ltc2978.c

Each output has individual on/off control.

>From PMBus_Specification_Part_II_Rev_1-3_20140318.pdf:
12.1.1. OPERATION Command Bit [7]
  Bit [7] controls whether the PMBus device output is on or off.
   If bit [7] is cleared (equals 0), then the output is off.
   If bit [7] is set (equals 1), then the output is on.

Fixes in v4 are not huge:
  Add device tree bindings documentation for ltc2978.
  rename _pmbus_regulator_enable to _pmbus_regulator_on_off
  simplify _pmbus_regulator_on_off code
  s/regulator_regulator/regulator/
  fix build break when !CONFIG_REGULATOR
  remove unused #define PB_OPERATION_CONTROL_SEQ_OFF
  fix a #endif comment
  simplify probe code, remove added switch statement
  remove BUG_ON(), add error message and fix num_regulators

Patch 1: document device tree bindings for ltc2978

Patch 2: add two helper functions for byte pmbus byte operations
  * byte write and byte read/modify/write

Patch 3: regulator support added in pmbus_core.c and pmbus.h
  * regulator_ops functions (is_enabled, enable, and disable)
  * gets regulator init data from device tree or platform data
  * registers the regulators
  * header has a macro for chip drivers to build their
    regulator_desc data

Patch 4: changes for ltc2978.c
  * Add Kconfig to enable/disable ltc2978 regulator functionality
  * add regulator_desc and of_regulator_match info
  * use same structs for all parts; set num_regulators appropriately.

Alan Tull (3):
  pmbus: core: add helpers for byte write and read modify write
  pmbus: add regulator support
  pmbus: ltc2978: add regulator support

Alan Tull (4):
  hwmon: ltc2978: device tree bindings documentation
  pmbus: core: add helpers for byte write and read modify write
  pmbus: add regulator support
  pmbus: ltc2978: add regulator support

 .../devicetree/bindings/hwmon/ltc2978.txt          |   42 +++++
 drivers/hwmon/pmbus/Kconfig                        |    7 +
 drivers/hwmon/pmbus/ltc2978.c                      |   37 +++++
 drivers/hwmon/pmbus/pmbus.h                        |   26 ++++
 drivers/hwmon/pmbus/pmbus_core.c                   |  160 ++++++++++++++++++++
 include/linux/i2c/pmbus.h                          |    4 +
 6 files changed, 276 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/hwmon/ltc2978.txt

-- 
1.7.9.5

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