autoboot: Rename CONFIG_MENUKEY to CONFIG_AUTOBOOT_MENUKEY
Since this is part of the autoboot functionality, it makes sense to name
it with an AUTOBOOT prefix. No mainline boards use it so this should be
safe, and downstream boards will need to adjust.
Since this option is just an integer value, it really needs another option
to control whether the feature is enabled or not. Add a new
CONFIG_USE_AUTOBOOT_MENUKEY for that. This fits better with how things are
done with Kconfig, avoiding the need to use a specific value to disable
the feature.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/doc/README.autoboot b/doc/README.autoboot
index de35f30..5e9a5e1 100644
--- a/doc/README.autoboot
+++ b/doc/README.autoboot
@@ -152,3 +152,11 @@
(Only effective when CONFIG_BOOT_RETRY_TIME is also set)
After the countdown timed out, the board will be reset to restart
again.
+
+ CONFIG_AUTOBOOT_USE_MENUKEY
+ CONFIG_AUTOBOOT_MENUKEY
+
+ If this key is pressed to stop autoboot, then the commands in the
+ environment variable 'menucmd' will be executed before boot starts.
+ For example, 33 means "!" in ASCII, so pressing ! at boot would take
+ this action.