doc: man-page for optee commands
Provide a man-page for the optee command.
Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@amd.com>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>
diff --git a/doc/usage/cmd/optee.rst b/doc/usage/cmd/optee.rst
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+.. SPDX-License-Identifier: GPL-2.0
+
+.. index::
+ single: optee (command)
+
+optee command
+=============
+
+Synopsis
+--------
+
+::
+
+ optee hello
+ optee hello <value>
+
+Description
+-----------
+
+This is an OP-TEE sanity test which invokes the "Hello World"
+Trusted Application (TA). The TA does two things:
+- It prints debug and information messages to the secure console (if logging is enabled)
+- It increments the integer value passed as a parameter and returns it
+
+
+value
+ Integer value that the TA is expected to increment and return.
+ The default value is 0.
+
+To enable the OP-TEE Hello World example please refer
+https://optee.readthedocs.io/en/latest/building/gits/optee_examples/optee_examples.html
+
+Examples
+--------
+
+::
+
+ ==> optee hello
+ D/TA: TA_CreateEntryPoint:39 has been called
+ I/TA: Hello World!
+ Value before: 0x0
+ Calling TA
+ D/TA: inc_value:105 has been called
+ I/TA: Got value: 0 from NW
+ I/TA: Increase value to: 1
+ Value after: 0x1
+ I/TA: Goodbye!
+ D/TA: TA_DestroyEntryPoint:50 has been called
+
+ ==> optee hello 74
+ D/TA: TA_CreateEntryPoint:39 has been called
+ I/TA: Hello World!
+ Value before: 0x74
+ Calling TA
+ D/TA: inc_value:105 has been called
+ I/TA: Got value: 116 from NW
+ I/TA: Increase value to: 117
+ Value after: 0x75
+ I/TA: Goodbye!
+ D/TA: TA_DestroyEntryPoint:50 has been called
+
+Configuration
+-------------
+
+The optee command is enabled by CONFIG_OPTEE=y and CONFIG_CMD_OPTEE=y.
+
+Return value
+------------
+
+The return value $? is 0 (true) if the command succeeds, 1 (false) otherwise.