dm: usb: Deal with USB keyboard persisting across tests
Clear any USB-keyboard devices before running a unit test, to avoid
using a stale udevice pointer in stdio. Add a long comment to explain
this situation and why this solution seems best, at least for now.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/usb.h b/include/usb.h
index e37f853..be37ed2 100644
--- a/include/usb.h
+++ b/include/usb.h
@@ -1092,4 +1092,16 @@
*/
void usb_show_tree(void);
+/**
+ * usb_kbd_remove_for_test() - Remove any USB keyboard
+ *
+ * This can only be called from test_pre_run(). It removes the USB keyboard from
+ * the console system so that the USB device can be dropped
+ */
+#if CONFIG_IS_ENABLED(USB_KEYBOARD)
+int usb_kbd_remove_for_test(void);
+#else
+static inline int usb_kbd_remove_for_test(void) { return 0; }
+#endif
+
#endif /*_USB_H_ */