tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1What: /sys/devices/platform/<platform>/tt_toggle
2Date: Jun 2023
3KernelVersion: 6.5
4Contact: "Antheas Kapenekakis" <lkml@antheas.dev>
5Description:
6 Takeover TDP controls from the device. OneXPlayer devices have a
7 turbo button that can be used to switch between two TDP modes
8 (usually 15W and 25W). By setting this attribute to 1, this
9 functionality is disabled, handing TDP control over to (Windows)
10 userspace software and the Turbo button turns into a keyboard
11 shortcut over the AT keyboard of the device. In addition,
12 using this setting is a prerequisite for PWM control for most
13 newer models (otherwise it NOOPs).
14
15What: /sys/devices/platform/<platform>/tt_led
16Date: April 2025
17KernelVersion: 6.16
18Contact: "Antheas Kapenekakis" <lkml@antheas.dev>
19Description:
20 Some OneXPlayer devices (e.g., X1 series) feature a little LED
21 nested in the Turbo button. This LED is illuminated when the
22 device is in the higher TDP mode (e.g., 25W). Once tt_toggle
23 is engaged, this LED is left dangling to its last state. This
24 attribute allows userspace to control the LED state manually
25 (either with 1 or 0). Only a subset of devices contain this LED.