TADPMU(4) Device Drivers Manual (sparc64) TADPMU(4)

tda
Tadpole PMU

Tadpole PMU Version 1.33

The tda driver provides basic support for the Tadpole PMU found in Tadpole SPARCle and Viper systems. The status of the AC adapter, battery, and fan are reported via the envstat(8) interface, and AC adapter and lid switch events are reported via the sysmon_pswitch(9) interface.

envstat(8)

The battery status is reported by reading the battery voltage. Pp. The points at which the battery level becomes warning and critical are reported by the PMU, but are not directly correlated with battery voltage, so might be misreported by the driver.
May 16, 2020 NetBSD 10.1