Commit 60cd40ee authored by Svyatoslav Ryhel's avatar Svyatoslav Ryhel Committed by Sebastian Reichel
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power: supply: Add support for Maxim MAX8971 charger 



The MAX8971 is a compact, high-frequency, high-efficiency switch-mode
charger for a one-cell lithium-ion (Li+) battery.

Signed-off-by: default avatarSvyatoslav Ryhel <clamor95@gmail.com>
Link: https://lore.kernel.org/r/20250430055114.11469-3-clamor95@gmail.com


Signed-off-by: default avatarSebastian Reichel <sebastian.reichel@collabora.com>
parent c5a0a64c

Documentation/ABI/testing/sysfs-class-power

+43 −0
Original line number Diff line number Diff line
@@ -822,3 +822,46 @@ Description: 
		Each entry is a link to the device which registered the extension.



		Access: Read



What:		/sys/class/power_supply/max8971-charger/fast_charge_timer

Date:		May 2025

KernelVersion:	6.15.0

Contact:	Svyatoslav Ryhel <clamor95@gmail.com>

Description:

		This entry shows and sets the maximum time the max8971

		charger operates in fast-charge mode. When the timer expires

		the device will terminate fast-charge mode (charging current

		will drop to 0 A) and will trigger interrupt.



		Valid values:



		- 4 - 10 (hours), step by 1

		- 0: disabled.



What:		/sys/class/power_supply/max8971-charger/top_off_threshold_current

Date:		May 2025

KernelVersion:	6.15.0

Contact:	Svyatoslav Ryhel <clamor95@gmail.com>

Description:

		This entry shows and sets the charging current threshold for

		entering top-off charging mode. When charging current in fast

		charge mode drops below this value, the charger will trigger

		interrupt and start top-off charging mode.



		Valid values:



		- 50000 - 200000 (microamps), step by 50000 (rounded down)



What:		/sys/class/power_supply/max8971-charger/top_off_timer

Date:		May 2025

KernelVersion:	6.15.0

Contact:	Svyatoslav Ryhel <clamor95@gmail.com>

Description:

		This entry shows and sets the maximum time the max8971

		charger operates in top-off charge mode. When the timer expires

		the device will terminate top-off charge mode (charging current

		will drop to 0 A) and will trigger interrupt.



		Valid values:



		- 0 - 70 (minutes), step by 10 (rounded down)

drivers/power/supply/Kconfig

+14 −0
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@@ -617,6 +617,20 @@ config CHARGER_MAX77976 
	  This driver can also be built as a module. If so, the module will be

	  called max77976_charger.



config CHARGER_MAX8971

	tristate "Maxim MAX8971 battery charger driver"

	depends on I2C

	select REGMAP_I2C

	help

	  The MAX8971 is a compact, high-frequency, high-efficiency switch-mode

	  charger for a one-cell lithium-ion (Li+) battery. It delivers up to

	  1.55A of current to the battery from inputs up to 7.5V and withstands

	  transient inputs up to 22V.



	  Say Y to enable support for the Maxim MAX8971 battery charger.

	  This driver can also be built as a module. If so, the module will be

	  called max8971_charger.



config CHARGER_MAX8997

	tristate "Maxim MAX8997/MAX8966 PMIC battery charger driver"

	depends on MFD_MAX8997 && REGULATOR_MAX8997

drivers/power/supply/Makefile

+1 −0
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@@ -83,6 +83,7 @@ obj-$(CONFIG_CHARGER_MAX77650) += max77650-charger.o 
obj-$(CONFIG_CHARGER_MAX77693)	+= max77693_charger.o

obj-$(CONFIG_CHARGER_MAX77705)	+= max77705_charger.o

obj-$(CONFIG_CHARGER_MAX77976)	+= max77976_charger.o

obj-$(CONFIG_CHARGER_MAX8971)	+= max8971_charger.o

obj-$(CONFIG_CHARGER_MAX8997)	+= max8997_charger.o

obj-$(CONFIG_CHARGER_MAX8998)	+= max8998_charger.o

obj-$(CONFIG_CHARGER_MP2629)	+= mp2629_charger.o

drivers/power/supply/max8971_charger.c

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