Add docs/use-psa-crypto.md
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
diff --git a/include/mbedtls/config.h b/include/mbedtls/config.h
index 2c7bed2..cc80471 100644
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/config.h
@@ -2119,6 +2119,9 @@
* will still continue to work as usual, so enabling this option should not
* break backwards compatibility.
*
+ * \note See docs/use-psa-crypto.md for a complete description of what this
+ * option currently does, and of parts that are not affected by it so far.
+ *
* \warning The PSA Crypto API is in beta stage. While you're welcome to
* experiment using it, incompatible API changes are still possible, and some
* parts may not have reached the same quality as the rest of Mbed TLS yet.