| 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. |