cd900f181a
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: Mike Looijmans <mike.looijmans@topic.nl> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
2.3 KiB
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)