[PATCH v1 0/9] power: supply: max17042_battery: improve MAX17055 support
From: Vincent Cloutier
Date: Mon Apr 06 2026 - 16:58:29 EST
From: Vincent Cloutier <vincent@xxxxxxxxxxx>
Hi,
This series refreshes the Librem 5 MAX17055 fuel-gauge work for upstream
on top of current `mainline/master`.
Original series:
https://lore.kernel.org/lkml/20220318001048.20922-1-sebastian.krzyszkowiak@xxxxxxx/
Compared to the earlier posted version, the main follow-up changes are:
- keep the original arithmetic form of the fractional `MAX17042_*_LSB`
expressions while still moving the unit conversions into shared defines
- remove the unused board-file style platform-data wrapper from the driver
- factor the `monitored-battery` parser behind a generic
`devm_power_supply_get_battery_info()` helper so MAX17042 can read DT
battery data before registration
- keep `voltage-max-design-microvolt` as an explicit MAX17055
`ModelCfg.VChg` setting so batteries at or below 4.25 V clear the
default bit
The attribution split is intentional:
- patches 1, 2, and 7 preserve the original signed Purism downstream work
from Sebastian Krzyszkowiak
- the remaining patches are cleanups and follow-ups on top of current
mainline code
Tested on Librem 5.
Sebastian Krzyszkowiak (3):
power: supply: max17042_battery: Put LSB units into defines
power: supply: max17042_battery: Use Current register in get_status
power: supply: max17042_battery: use ModelCfg refresh on max17055
Vincent Cloutier (6):
power: supply: max17042_battery: Use dev_err_probe for power supply
registration
power: supply: max17042_battery: Route MAX17055 SOC alerts through
dSOCi
power: supply: max17042_battery: Keep only critical alerts during
suspend
power: supply: max17042_battery: Remove unused platform-data plumbing
power: supply: Read MAX17042 battery info before registration
power: supply: max17042_battery: Treat MAX17055 VChg as explicit DT
setting
drivers/power/supply/max17042_battery.c | 428 ++++++++++++++---------
drivers/power/supply/power_supply_core.c | 188 ++++++----
include/linux/power/max17042_battery.h | 33 +-
include/linux/power_supply.h | 10 +
4 files changed, 393 insertions(+), 266 deletions(-)
base-commit: 46b513250491a7bfc97d98791dbe6a10bcc8129d
--
2.53.0