From ce1ae41dd68c07469a7f3d7421c758c95bde0903 Mon Sep 17 00:00:00 2001
From: Joerg Wunsch <j@uriah.heep.sax.de>
Date: Sat, 23 Jul 2022 16:30:38 +0200
Subject: [PATCH] Document that 'h', 'o', and 'd' file formats are output-only.

---
 src/avrdude.1        | 3 +++
 src/doc/avrdude.texi | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/src/avrdude.1 b/src/avrdude.1
index b312fff5..9f7eacde 100644
--- a/src/avrdude.1
+++ b/src/avrdude.1
@@ -733,14 +733,17 @@ fuse bit settings.
 hexadecimal; each value will get the string
 .Em 0x
 prepended.
+Only valid on output.
 .It Ar o
 octal; each value will get a
 .Em 0
 prepended unless it is less than 8 in which case it gets no prefix.
+Only valid on output.
 .It Ar b
 binary; each value will get the string
 .Em 0b
 prepended.
+Only valid on output.
 .El
 .Pp
 The default is to use auto detection for input files, and raw binary
diff --git a/src/doc/avrdude.texi b/src/doc/avrdude.texi
index 83b6fb3f..24a14253 100644
--- a/src/doc/avrdude.texi
+++ b/src/doc/avrdude.texi
@@ -802,13 +802,16 @@ fuse bit settings.
 
 @item h
 hexadecimal; each value will get the string @emph{0x} prepended.
+Only valid on output.
 
 @item o
 octal; each value will get a @emph{0}
 prepended unless it is less than 8 in which case it gets no prefix.
+Only valid on output.
 
 @item b
 binary; each value will get the string @emph{0b} prepended.
+Only valid on output.
 
 @end table