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-rw-r--r--Documentation/user/state.rst8
1 files changed, 7 insertions, 1 deletions
diff --git a/Documentation/user/state.rst b/Documentation/user/state.rst
index 07743df..78ce24f 100644
--- a/Documentation/user/state.rst
+++ b/Documentation/user/state.rst
@@ -21,7 +21,13 @@ RAUC_.
.. _RAUC: https://rauc.readthedocs.io/en/latest/
barebox itself uses a *state* driver to access the variables in the
-persistent memory. For the Linux run-time there is a userspace tool_ to do
+persistent memory.
+
+Currently there is only one implementation, enabled by
+``CONFIG_STATE_DRV=y``. Without driver, the state framework will silently
+fail and be non-functional.
+
+For the Linux run-time there is a userspace tool_ to do
the same.
.. _tool: https://git.pengutronix.de/cgit/tools/dt-utils/