The fuel gauge subsystem exposes an API to uniformly access battery fuel gauge devices. Currently, only reading data is supported.
Note: This API is currently experimental and this doc will be significantly changed as new features are added to the API.
Fundamentally, a property is a quantity that a fuel gauge device can measure.
Fuel gauges typically support multiple properties, such as temperature readings of the battery-pack or present-time current/voltage.
Properties are fetched using a client allocated array of :cfuel_gauge_get_property. This array is then populated by values as according to its property_type field.
Many fuel gauges embedded within battery packs expose a register address that when written to with a specific payload will do a battery cutoff. This battery cutoff is often referred to as ship, shelf, or sleep mode due to its utility in reducing battery drain while devices are stored or shipped.
The fuel gauge API exposes battery cutoff with the :cfuel_gauge_battery_cutoff function.
The Fuel Gauge API explicitly provides no caching for its clients.
fuel_gauge_interface
fuel_gauge_emulator_backend