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optee: use uuid for sysfs driver entry

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With the evolving use-cases for TEE bus, now it's required to support
multi-stage enumeration process. But using a simple index doesn't
suffice this requirement and instead leads to duplicate sysfs entries.
So instead switch to use more informative device UUID for sysfs entry
like:
/sys/bus/tee/devices/optee-ta-<uuid>

Signed-off-by: Maxim Uvarov <maxim.uvarov@linaro.org>
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
This commit is contained in:
Maxim Uvarov
2020-06-18 16:52:49 +03:00
committed by Jens Wiklander
parent 3d77e6a880
commit 58df195cd4
3 changed files with 15 additions and 3 deletions
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8
Documentation/ABI/testing/sysfs-bus-optee-devices Normal file
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What: /sys/bus/tee/devices/optee-ta-<uuid>/
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 <uuid>
matches Trusted Application (TA) driver and corresponding TA in secure OS. Drivers
are free to create needed API under optee-ta-<uuid> directory.