[lkml]   [2020]   [Feb]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Subject[RFC PATCH v2 0/5] Support ROHM BD99954 charger IC
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

Series introduces "linear ranges" helper intended to help converting
real-world values to register values when conversion is linear. This
version just meld the helpers in power/supply. Idea is stolen from
regulator framework's linear-ranges handling.

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-v2:
- 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
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:
Parsing of new battery parameters
Patch 5:
BD99954 driver


Matti Vaittinen (5):
dt-bindings: battry: add new battery parameters
dt_bindings: ROHM BD99954 Charger
power: Add linear_range helper
power: supply: add battery parameters
power: supply: Support ROHM bd99954 charger

.../bindings/power/supply/battery.txt | 6 +
.../bindings/power/supply/rohm,bd9995x.yaml | 167 +++
drivers/power/supply/Kconfig | 14 +
drivers/power/supply/Makefile | 2 +
drivers/power/supply/bd70528-charger.c | 65 +-
drivers/power/supply/bd99954-charger.c | 1140 +++++++++++++++++
drivers/power/supply/linear-ranges.h | 36 +
drivers/power/supply/linear_ranges.c | 92 ++
drivers/power/supply/power_supply_core.c | 8 +
include/linux/power/bd99954-charger.h | 1075 ++++++++++++++++
include/linux/power_supply.h | 4 +
11 files changed, 2552 insertions(+), 57 deletions(-)
create mode 100644 Documentation/devicetree/bindings/power/supply/rohm,bd9995x.yaml
create mode 100644 drivers/power/supply/bd99954-charger.c
create mode 100644 drivers/power/supply/linear-ranges.h
create mode 100644 drivers/power/supply/linear_ranges.c
create mode 100644 include/linux/power/bd99954-charger.h


Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU

~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
Simon says - in Latin please.
~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
Thanks to Simon Glass for the translation =]

 \ /
  Last update: 2020-02-14 08:30    [W:0.195 / U:5.672 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site