| 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. |
