kernel/linux.git/include/linux/power/max17042_battery.h, branch linux-7.1.y

power: supply: max17042: consider task period (max77759)

2026-03-03T22:58:07+00:00

Several (register) values reported by the fuel gauge depend on its internal task period and it needs to be taken into account when calculating results. All relevant example formulas in the data sheet assume the default task period (of 5760) and final results need to be adjusted based on the task period in effect. Update the code as and where necessary. Reviewed-by: Peter Griffin Signed-off-by: André Draszik Link: https://patch.msgid.link/20260302-max77759-fg-v3-10-3c5f01dbda23@linaro.org Signed-off-by: Sebastian Reichel

power: supply: max17042: initial support for Maxim MAX77759

2026-03-03T22:58:07+00:00

The Maxim MAX77759 is a companion PMIC intended for use in mobile phones and tablets. It is used on Google Pixel 6 and 6 Pro (oriole and raven). Amongst others, it contains a fuel gauge that is similar to the ones supported by this driver. The fuel gauge can measure battery charge and discharge current, battery voltage, battery temperature, and the Type C connector's temperature. The MAX77759 incorporates the Maxim ModelGauge m5 algorithm. It, as well as previous generations like m3 on max17047/max17050, requires the host to save/restore some register values across power cycles to maintain full accuracy. Extending the driver for such support is out of scope in this initial commit. Reviewed-by: Peter Griffin Signed-off-by: André Draszik Link: https://patch.msgid.link/20260302-max77759-fg-v3-9-3c5f01dbda23@linaro.org Signed-off-by: Sebastian Reichel

power: supply: max17042_battery: fix typo in MAX17042_IAvg_empty

2021-10-02T15:49:11+00:00

Datasheet gives the name IAvg_empty, not LAvg_empty. Signed-off-by: Henrik Grimler Reviewed-by: Hans de Goede Reviewed-by: Krzysztof Kozlowski Signed-off-by: Sebastian Reichel

power: supply: max17042_battery: more robust chip type checks

2021-08-17T13:33:52+00:00

Prepared by checking the datasheets of max17042, max17047/50 and max170455 for differences in register maps. Signed-off-by: Sebastian Krzyszkowiak Signed-off-by: Sebastian Reichel

power: supply: max17042_battery: fix typo in MAx17042_TOFF

2021-08-17T13:33:52+00:00

Signed-off-by: Sebastian Krzyszkowiak Signed-off-by: Sebastian Reichel

power: supply: max17042_battery: clean up MAX17055_V_empty

2021-08-17T13:33:52+00:00

This register is same as in MAX17047 and MAX17050, so there's no need for custom casing it. Signed-off-by: Sebastian Krzyszkowiak Signed-off-by: Sebastian Reichel

power: supply: max17042: add MAX17055 support

2019-12-19T00:07:53+00:00

The MAX17055 is very similar to the MAX17042 so extend the driver. Signed-off-by: Angus Ainslie (Purism) Reviewed-by: Krzysztof Kozlowski Signed-off-by: Sebastian Reichel

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156

2019-05-30T18:26:35+00:00

Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 59 temple place suite 330 boston ma 02111 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Reviewed-by: Richard Fontana Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman

power: supply: max17042_battery: Add support for the STATUS property

2017-05-01T10:37:29+00:00

Userspace prefers the driver having a status property over having to guess itself. Specifically this will properly make the GNOME3 UI (and likely others) properly show discharging / charging / full status, instead of always showing discharging as status. Note that in the case there is no charger driver supplying the max17042, then a status of unknown will get returned. At least upower treats this the same as not having a status attribute, so in this case nothing changes from a userspace pov. Signed-off-by: Hans de Goede Reviewed-by: Krzysztof Kozlowski Signed-off-by: Sebastian Reichel

power: supply: max17042_battery: Add default platform_data fallback data

2017-05-01T10:37:25+00:00

Some x86 machines use a max17047 fuel-gauge and x86 might be missing platform_data if not provided by SFI. This commit adds default platform_data as fallback option so that the driver can work on boards where no platform_data is provided. Since not all boards have a thermistor hooked up, set temp_min to 0 and change the health checks from temp <= temp_min to temp < temp_min to not trigger on such boards (where temp reads 0). Signed-off-by: Hans de Goede Reviewed-by: Krzysztof Kozlowski Signed-off-by: Sebastian Reichel