doc: release notes: Update contents for 2.2.0

Update to API change in regards of USB changes. Signed-off-by: Emil Obalski <[email protected]>
k0d · Dec 19, 2019 · 7fc0486 · 7fc0486
1 parent ab346a5
commit 7fc0486
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/doc/releases/release-notes-2.2.rst b/doc/releases/release-notes-2.2.rst
@@ -27,6 +27,15 @@ Deprecated in this release
 Stable API changes in this release
 ==================================
 
+* USB
+
+  * The usb_enable() function, which was previously invoked automatically
+    by the USB stack, now needs to be explicitly called by the application
+    in order to enable the USB subsystem.
+  * The usb_enable() function now takes a parameter, usb_dc_status_callback
+    which can be set by the application to a callback to receive status events
+    from the USB stack. The parameter can also be set to NULL if no callback is required.
+
 Removed APIs in this release
 ============================