tee: add OP-TEE driver

Adds a OP-TEE driver which also can be compiled as a loadable module.

* Targets ARM and ARM64
* Supports using reserved memory from OP-TEE as shared memory
* Probes OP-TEE version using SMCs
* Accepts requests on privileged and unprivileged device
* Uses OPTEE message protocol version 2 to communicate with secure world

Acked-by: Andreas Dannenberg <dannenberg@ti.com>
Tested-by: Jerome Forissier <jerome.forissier@linaro.org> (HiKey)
Tested-by: Volodymyr Babchuk <vlad.babchuk@gmail.com> (RCAR H3)
Tested-by: Scott Branden <scott.branden@broadcom.com>
Reviewed-by: Javier González <javier@javigon.com>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index 017521958c86..ffcc4a841b64 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9369,6 +9369,11 @@ F:	arch/*/oprofile/
 F:      drivers/oprofile/
 F:      include/linux/oprofile.h
 
+OP-TEE DRIVER
+M:      Jens Wiklander <jens.wiklander@linaro.org>
+S:      Maintained
+F:      drivers/tee/optee/
+
 ORACLE CLUSTER FILESYSTEM 2 (OCFS2)
 M:      Mark Fasheh <mfasheh@versity.com>
 M:      Joel Becker <jlbec@evilplan.org>