What: /sys/bus/tee/devices/optee-ta-/ Date: May 2020 KernelVersion 5.8 Contact: op-tee@lists.trustedfirmware.org Description: OP-TEE bus provides reference to registered drivers under this directory. The matches Trusted Application (TA) driver and corresponding TA in secure OS. Drivers are free to create needed API under optee-ta- directory. What: /sys/bus/tee/devices/optee-ta-/need_supplicant Date: November 2023 KernelVersion: 6.7 Contact: op-tee@lists.trustedfirmware.org Description: Allows to distinguish whether an OP-TEE based TA/device requires user-space tee-supplicant to function properly or not. This attribute will be present for devices which depend on tee-supplicant to be running.