wic: add description of --mkfs-extraopts

Updated help contents with the description of new
wks option --mkfs-extraopts

(From OE-Core rev: 69c95f74013d0d8b199abc38ba0d6f3ff952eed3)

Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/scripts/lib/wic/help.py b/scripts/lib/wic/help.py
index 23d943cc4c..99912cd400 100644
--- a/scripts/lib/wic/help.py
+++ b/scripts/lib/wic/help.py
@@ -943,6 +943,12 @@ DESCRIPTION
                       for the harware that requires non-default partition system ids. The parameter
                       in one byte long hex number either with 0x prefix or without it.
 
+         --mkfs-extraopts: This option specifies extra options to pass to mkfs utility.
+                           NOTE, that wic uses default options for some filesystems, for example
+                           '-S 512' for mkfs.fat or '-F -i 8192' for mkfs.ext. Those options will
+                           not take effect when --mkfs-extraopts is used. This should be taken into
+                           account when using --mkfs-extraopts.
+
     * bootloader
 
       This command allows the user to specify various bootloader