expo: Use standard numbering for save and discard

[J-u-boot.git] / doc / develop / cedit.rst

diff --git a/doc/develop/cedit.rst b/doc/develop/cedit.rst
index 82305b921f0a341fc1fde30fb2dcafd07b540502..310be8892404fd117a4af956d70f04783baf6574 100644 (file)
--- a/doc/develop/cedit.rst
+++ b/doc/develop/cedit.rst
@@ -94,7 +94,7 @@ them. Expo supports doing this with an enum, where every ID is listed in the
 enum::
 
     enum {
-        ZERO,
+        ID_PROMPT = EXPOID_BASE_ID,
 
         ID_PROMPT,
 
@@ -130,6 +130,11 @@ that means that something is wrong with your syntax, or perhaps you have an ID
 in the `.dts` file that is not mentioned in your enum. Check both files and try
 again.
 
+Note that the first ID in your file must be no less that `EXPOID_BASE_ID` since
+IDs before that are reserved. The `expo.py` tool automatically obtains this
+value from the `expo.h` header file, but you must set the first ID to this
+enum value.
+
 
 Use the command interface
 -------------------------