doc/usage: cmd: documentation for meson/sm command

Added docs for Meson Security Monitor command.

Signed-off-by: Alexey Romanov <[email protected]>
Reviewed-by: Mattijs Korpershoek <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Neil Armstrong <[email protected]>

1 files changed, 44 insertions, 0 deletions

diff --git a/doc/usage/cmd/sm.rst b/doc/usage/cmd/sm.rst
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+.. SPDX-License-Identifier: GPL-2.0+:
+
+sm command
+==========
+
+Synopis
+-------
+
+::
+
+    sm serial <address>
+    sm reboot_reason [name]
+    sm efuseread <offset> <size> <address>
+    sm efusewrite <offset> <size> <address>
+    sm efusedump <offset> <size>
+
+Description
+-----------
+
+The sm command is used to request services from the secure monitor. User
+can call secure monitor to request special TEE function, for example chip
+serial number info, reboot reason, etc.
+
+sm serial
+  Retrieve chip unique serial number from sm and write it to memory on
+  appropriate address.
+
+sm reboot_reason
+  Print reboot reason to the console, if parameter [name] isn't specified.
+  If parameter specified, set reboot reason string to environment variable
+  with this name.
+
+sm efuseread
+  Read <size> bytes starting from <offset> from efuse memory bank and write
+  result to the address <address>.
+
+sm efusewrite
+  Write into efuse memory bank, starting from <offset>, the <size> bytes
+  of data, located at address <address>.
+
+Configuration
+-------------
+
+To use the sm command you must specify CONFIG_CMD_MESON=y