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11da3403e9
For nearly all commands in U-Boot the '?' variable is handled the same way with 0 meaning success, 1 meaning any failure. Explain this in the general rules section of the cmdline documentation (with a link to a counter example) and then remove the redundant wording from most commands. We retain a section about the return value in a number of places where we are doing something such as always returning a specific value or we have useful additional information to go along with the normal return codes. Signed-off-by: Tom Rini <trini@konsulko.com> Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
66 lines
1.4 KiB
ReStructuredText
66 lines
1.4 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0
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.. index::
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single: optee (command)
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optee command
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=============
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Synopsis
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--------
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::
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optee hello
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optee hello <value>
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Description
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-----------
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This is an OP-TEE sanity test which invokes the "Hello World"
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Trusted Application (TA). The TA does two things:
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- It prints debug and information messages to the secure console (if logging is enabled)
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- It increments the integer value passed as a parameter and returns it
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value
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Integer value that the TA is expected to increment and return.
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The default value is 0.
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To enable the OP-TEE Hello World example please refer
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https://optee.readthedocs.io/en/latest/building/gits/optee_examples/optee_examples.html
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Examples
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--------
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::
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==> optee hello
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D/TA: TA_CreateEntryPoint:39 has been called
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I/TA: Hello World!
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Value before: 0x0
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Calling TA
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D/TA: inc_value:105 has been called
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I/TA: Got value: 0 from NW
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I/TA: Increase value to: 1
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Value after: 0x1
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I/TA: Goodbye!
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D/TA: TA_DestroyEntryPoint:50 has been called
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==> optee hello 74
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D/TA: TA_CreateEntryPoint:39 has been called
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I/TA: Hello World!
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Value before: 0x74
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Calling TA
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D/TA: inc_value:105 has been called
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I/TA: Got value: 116 from NW
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I/TA: Increase value to: 117
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Value after: 0x75
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I/TA: Goodbye!
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D/TA: TA_DestroyEntryPoint:50 has been called
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Configuration
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-------------
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The optee command is enabled by CONFIG_OPTEE=y and CONFIG_CMD_OPTEE=y.
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