Why acpi_call?

[ghtau]

TLP's documentation states:

As of version 5.17, the Linux kernel in combination with TLP 1.5 or later offers full battery care support (i.e. charge thresholds and recalibration) for ThinkPads from model year 2011 onwards.

...and later even calls acpi_call "obsolete".

So I'm curious why it's used and why the module states that it "makes tlp work for newer thinkpads"? The natacpi + thinkpad_acpi combo works for me on older Thinkpads (e.g. X230) and my more recent ones (e.g. T470s).

[Mic92]

It's probably fair to remove it at this point.