[RFC,v3,0/8] Support ROHM BD99954 charger IC

Message

Vaittinen, Matti Feb. 20, 2020, 7:33 a.m. UTC

Support ROHM BD99954 Battery Management IC

ROHM BD99954 is a Battery Management IC for 1-4 cell Lithium-Ion
secondary battery. BD99954 is intended to be used in space-constraint
equipment such as Low profile Notebook PC, Tablets and other
applications.

Series extracts a "linear ranges" helper out of the regulator
framework. Linear ranges helper is intended to help converting
real-world values to register values when conversion is linear. I
suspect this is usefull also for power subsystem and possibly for clk.

This version of series introduces new battry DT binding entries and
adds the parsing in power_supply_get_battery_info(). These properties
can be converted to ROHM specific properties and parsing can be moved
to the BD99954 driver if this does not seem like a right thing to do.
I just have a feeling the the BD99954 is not the only charger which
could utilize these.

We also add ROHM specific charger parameters for limiting the input
current(s). I think these parameters are pretty common and maybe the
"rohm,"-prefix should be dropped and we should try having common
input limiting properties for different chips?

Series is based on v5.5-rc7

Changelog RFC-v3:
 DT-bindings:
   - fix the BD99954 binding (the *-microvolt Vs. *-microvolts issue is
     still there. Not sure which one is correct)
   - renabe tricklecharge-* binding to trickle-charge-* as suggested by
     Rob.
   - drop the linear-ranges helper which was written for BD70528 and
     extract the linear-range code from regulator framework instead.
   - refactor regulator framework to utilize extracted linear-ranges
     code.
   - change the struct regulator_linear_range to linear_range from
     regulator drivers.
   - refactor BD70528 to use regulator framework originated
     linear-ranges code.
   - change BD99954 to use linear-ranges code from regulator framework

Changelog RFC-v2:
 DT-bindings:
   - Used the battery parameters described in battery.txt
   - Added few new parameters to battery.txt
   - Added ASCII art charging profile chart for BD99954 to explain
     states and limits.
 Linear ranges:
   - Fixed division by zero error from linear-ranges code if step 0 is
     used.
 Power-supply core:
   - Added parsing of new battery parameters.
 BD99954 driver:
   - converted to use battery parameters from battery node
   - Added step 0 ranges for reg values which do not change voltage
   - added dt-node to psy-config

Patch 1:
	DT binding docs for the new battery parameters
Patch 2:
	BD99954 charger DT binding docs
Patch 3:
	Linear ranges helpers
Patch 4:
	Rename struct regulator_linear_range to struct linear_range and
	convert regulator drivers to use renamed struct
Patch 5:
	Use linear-ranges helpers in regulator framework
Patch 6:
	Use linear-ranges helpers in bd70528 driver
Patch 7:
	Parsing of new battery parameters
Patch 8:
	ROHM BD99954 charger IC driver

---

Matti Vaittinen (8):
  dt-bindings: battry: add new battery parameters
  dt_bindings: ROHM BD99954 Charger
  drivers: base: add linear ranges helpers
  regulator: rename regulator_linear_range to linear_range
  regulator: use linear_ranges helper
  power: supply: bd70528: use linear ranges
  power: supply: add battery parameters
  power: supply: Support ROHM bd99954 charger

 .../bindings/power/supply/battery.txt         |    6 +
 .../bindings/power/supply/rohm,bd9995x.yaml   |  153 +++
 drivers/base/Kconfig                          |    3 +
 drivers/base/Makefile                         |    1 +
 drivers/base/linear_ranges.c                  |  246 ++++
 drivers/power/supply/Kconfig                  |   11 +
 drivers/power/supply/Makefile                 |    1 +
 drivers/power/supply/bd70528-charger.c        |  142 +-
 drivers/power/supply/bd99954-charger.c        | 1171 +++++++++++++++++
 drivers/power/supply/power_supply_core.c      |    8 +
 drivers/regulator/88pg86x.c                   |    4 +-
 drivers/regulator/88pm800-regulator.c         |    4 +-
 drivers/regulator/Kconfig                     |    1 +
 drivers/regulator/act8865-regulator.c         |    4 +-
 drivers/regulator/act8945a-regulator.c        |    2 +-
 drivers/regulator/arizona-ldo1.c              |    2 +-
 drivers/regulator/arizona-micsupp.c           |    4 +-
 drivers/regulator/as3711-regulator.c          |    6 +-
 drivers/regulator/as3722-regulator.c          |    4 +-
 drivers/regulator/axp20x-regulator.c          |   16 +-
 drivers/regulator/bcm590xx-regulator.c        |    8 +-
 drivers/regulator/bd70528-regulator.c         |    8 +-
 drivers/regulator/bd718x7-regulator.c         |   26 +-
 drivers/regulator/da903x.c                    |    2 +-
 drivers/regulator/helpers.c                   |  130 +-
 drivers/regulator/hi6421-regulator.c          |    4 +-
 drivers/regulator/lochnagar-regulator.c       |    4 +-
 drivers/regulator/lp873x-regulator.c          |    4 +-
 drivers/regulator/lp87565-regulator.c         |    2 +-
 drivers/regulator/lp8788-buck.c               |    2 +-
 drivers/regulator/max77650-regulator.c        |    2 +-
 drivers/regulator/mcp16502.c                  |    4 +-
 drivers/regulator/mt6323-regulator.c          |    6 +-
 drivers/regulator/mt6358-regulator.c          |    8 +-
 drivers/regulator/mt6380-regulator.c          |    6 +-
 drivers/regulator/mt6397-regulator.c          |    6 +-
 drivers/regulator/palmas-regulator.c          |    4 +-
 drivers/regulator/qcom-rpmh-regulator.c       |    2 +-
 drivers/regulator/qcom_rpm-regulator.c        |   14 +-
 drivers/regulator/qcom_smd-regulator.c        |   70 +-
 drivers/regulator/rk808-regulator.c           |   10 +-
 drivers/regulator/s2mps11.c                   |   14 +-
 drivers/regulator/sky81452-regulator.c        |    2 +-
 drivers/regulator/stpmic1_regulator.c         |   18 +-
 drivers/regulator/tps65086-regulator.c        |   10 +-
 drivers/regulator/tps65217-regulator.c        |    4 +-
 drivers/regulator/tps65218-regulator.c        |    6 +-
 drivers/regulator/tps65912-regulator.c        |    4 +-
 drivers/regulator/twl-regulator.c             |    4 +-
 drivers/regulator/twl6030-regulator.c         |    2 +-
 drivers/regulator/wm831x-dcdc.c               |    2 +-
 drivers/regulator/wm831x-ldo.c                |    4 +-
 drivers/regulator/wm8350-regulator.c          |    2 +-
 drivers/regulator/wm8400-regulator.c          |    2 +-
 include/linux/linear_range.h                  |   48 +
 include/linux/power/bd99954-charger.h         | 1075 +++++++++++++++
 include/linux/power_supply.h                  |    4 +
 include/linux/regulator/driver.h              |   27 +-
 58 files changed, 3000 insertions(+), 339 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/power/supply/rohm,bd9995x.yaml
 create mode 100644 drivers/base/linear_ranges.c
 create mode 100644 drivers/power/supply/bd99954-charger.c
 create mode 100644 include/linux/linear_range.h
 create mode 100644 include/linux/power/bd99954-charger.h


base-commit def9d2780727 ("Linux 5.5-rc7")