efi: Mention that efi_info_get() is only used in the stub
This provides access to EFI tables after U-Boot has exited boot services.
It is not needed in the app since boot services remain alive and we can
just call them whenever needed.
Add a comment to explain this.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/include/efi.h b/include/efi.h
index 8c3f332..877a2e5 100644
--- a/include/efi.h
+++ b/include/efi.h
@@ -566,6 +566,10 @@
/**
* efi_info_get() - get an entry from an EFI table
*
+ * This function is called from U-Boot proper to read information set up by the
+ * EFI stub. It can only be used when running from the EFI stub, not when U-Boot
+ * is running as an app.
+ *
* @type: Entry type to search for
* @datap: Returns pointer to entry data
* @sizep: Returns pointer to entry size