What: /sys/devices/platform/<platform>/tt_toggle
Date: Jun 2023
KernelVersion: 6.5
Contact:
"Antheas Kapenekakis" <lkml@antheas.dev>
Description:
Takeover TDP controls from the device. OneXPlayer devices have a
turbo button that can be used to
switch between two TDP modes
(usually 15W
and 25W). By setting
this attribute to 1,
this
functionality is disabled, handing TDP control over to (Windows)
userspace software
and the Turbo button turns into a keyboard
shortcut over the AT keyboard of the device. In addition,
using this setting is a prerequisite
for PWM control
for most
newer models (otherwise it NOOPs).
What: /sys/devices/platform/<platform>/tt_led
Date: April 2025
KernelVersion: 6.16
Contact:
"Antheas Kapenekakis" <lkml@antheas.dev>
Description:
Some OneXPlayer devices (e.g., X1 series) feature a little LED
nested in the Turbo button.
This LED is illuminated when the
device is in the higher TDP mode (e.g., 25W). Once tt_toggle
is engaged,
this LED is left dangling to its last state.
This
attribute allows userspace to control the LED state manually
(either with 1
or 0). Only a subset of devices contain
this LED.
