coreboot: Add manual fan control

In automatic mode, EC is responsible for controlling fan duty as part of
thermal management. This is the existing behavior.

In manual mode, EC does not control fan duty target. The OS is
responsible for controlling duty for thermal management.

Control by system firmware is not yet implemented.

This allows users to control fan duty via ACPI.

RPM target is not supported.

Signed-off-by: Tim Crawford <tcrawford@system76.com>
This commit is contained in:
Tim Crawford 2025-01-07 13:58:26 -07:00
parent 102269c082
commit 9736477a66
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Subproject commit 01f4c5bebc1a762364eaf4363c35de3179cb6fc6 Subproject commit 520350e0b5ef2be05e4e32846835803fa79b385d