mirror of
https://github.com/torvalds/linux
synced 2024-07-22 11:10:46 +00:00
167f77f7d0
On newer Microsoft Surface models (specifically 7th-generation, i.e. Surface Pro 7, Surface Book 3, Surface Laptop 3, and Surface Laptop Go), battery and AC status/information is no longer handled via standard ACPI devices, but instead directly via the Surface System Aggregator Module (SSAM), i.e. the embedded controller on those devices. While on previous generation models, battery status is also handled via SSAM, an ACPI shim was present to translate the standard ACPI battery interface to SSAM requests. The SSAM interface itself, which is modeled closely after the ACPI interface, has not changed. This commit introduces a new SSAM client device driver to support battery status/information via the aforementioned interface on said Surface models. It is in parts based on the standard ACPI battery driver. Signed-off-by: Maximilian Luz <luzmaximilian@gmail.com> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
16 lines
449 B
Plaintext
16 lines
449 B
Plaintext
What: /sys/class/power_supply/<supply_name>/alarm
|
|
Date: April 2021
|
|
KernelVersion: 5.13
|
|
Contact: Maximilian Luz <luzmaximilian@gmail.com>
|
|
Description:
|
|
Battery trip point. When the remaining battery capacity crosses this
|
|
value in either direction, the system will be notified and if
|
|
necessary woken.
|
|
|
|
Set to zero to clear/disable.
|
|
|
|
Access: Read, Write
|
|
|
|
Valid values: In micro-Wh or micro-Ah, depending on the power unit
|
|
of the battery
|