Commit cd900f18 authored by Mike Looijmans's avatar Mike Looijmans Committed by Sebastian Reichel
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power/supply: Add ltc4162-l-charger 



Add support for the LTC4162-L Li-Ion battery charger. The driver allows
reading back telemetry and to set some charging options like the input
current limit.

Signed-off-by: default avatarMike Looijmans <mike.looijmans@topic.nl>
Signed-off-by: default avatarSebastian Reichel <sebastian.reichel@collabora.com>
parent 50da8d04

Documentation/ABI/testing/sysfs-class-power-ltc4162l

0 → 100644
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What:		/sys/class/power_supply/ltc4162-l/charge_status

Date:		Januari 2021

KernelVersion:	5.11

Description:

		Detailed charge status information as reported by the chip.



		Access: Read



		Valid values:

			ilim_reg_active

			thermal_reg_active

			vin_uvcl_active

			iin_limit_active

			constant_current

			constant_voltage

			charger_off



What:		/sys/class/power_supply/ltc4162-l/ibat

Date:		Januari 2021

KernelVersion:	5.11

Description:

		Battery input current as measured by the charger. Negative value

		means that the battery is discharging.



		Access: Read



		Valid values: Signed value in microamps



What:		/sys/class/power_supply/ltc4162-l/vbat

Date:		Januari 2021

KernelVersion:	5.11

Description:

		Battery voltage as measured by the charger.



		Access: Read



		Valid values: In microvolts



What:		/sys/class/power_supply/ltc4162-l/vbat_avg

Date:		Januari 2021

KernelVersion:	5.11

Description:

		Battery voltage, averaged over time, as measured by the charger.



		Access: Read



		Valid values: In microvolts



What:		/sys/class/power_supply/ltc4162-l/force_telemetry

Date:		Januari 2021

KernelVersion:	5.11

Description:

		To save battery current, the measurement system is disabled if

		the battery is the only source of power. This affects all

		voltage, current and temperature measurements.

		Write a "1" to this to keep performing telemetry once every few

		seconds, even when running on battery (as reported by the online

		property, which is "1" when external power is available and "0"

		when the system runs on battery).



		Access: Read, Write



		Valid values: 0 (disabled) or 1 (enabled)



What:		/sys/class/power_supply/ltc4162-l/arm_ship_mode

Date:		Januari 2021

KernelVersion:	5.11

Description:

		The charger will normally drain the battery while inactive,

		typically drawing about 54 microamps. Write a "1" to this

		property to arm a special "ship" mode that extends shelf life

		by reducing the leakage to about 2.8 microamps. The chip will

		remain in this mode (and no longer respond to I2C commands)

		until some external power-supply is attached raising the input

		voltage above 1V. It will then automatically revert to "0".

		Writing a "0" to the property cancels the "ship" mode request.

		The ship mode, when armed, activates once the input voltage

		drops below 1V.



		Access: Read, Write



		Valid values: 0 (disable) or 1 (enable)

drivers/power/supply/Kconfig

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@@ -513,6 +513,14 @@ config CHARGER_LT3651 
	  Say Y to include support for the Analog Devices (Linear Technology)

	  LT3651 battery charger which reports its status via GPIO lines.



config CHARGER_LTC4162L

	tristate "LTC4162-L charger"

	depends on I2C

	select REGMAP_I2C

	help

	  Say Y to include support for the Analog Devices (Linear Technology)

	  LTC4162-L battery charger connected to I2C.



config CHARGER_MAX14577

	tristate "Maxim MAX14577/77836 battery charger driver"

	depends on MFD_MAX14577

drivers/power/supply/Makefile

+1 −0
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@@ -70,6 +70,7 @@ obj-$(CONFIG_CHARGER_LP8788) += lp8788-charger.o 
obj-$(CONFIG_CHARGER_GPIO)	+= gpio-charger.o

obj-$(CONFIG_CHARGER_MANAGER)	+= charger-manager.o

obj-$(CONFIG_CHARGER_LT3651)	+= lt3651-charger.o

obj-$(CONFIG_CHARGER_LTC4162L)	+= ltc4162-l-charger.o

obj-$(CONFIG_CHARGER_MAX14577)	+= max14577_charger.o

obj-$(CONFIG_CHARGER_DETECTOR_MAX14656)	+= max14656_charger_detector.o

obj-$(CONFIG_CHARGER_MAX77650)	+= max77650-charger.o