Implement usage for --help and put the same information into the README, too.
Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2790 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
diff --git a/util/superiotool/README b/util/superiotool/README
index 2502fbf..f0294d4 100644
--- a/util/superiotool/README
+++ b/util/superiotool/README
@@ -28,10 +28,25 @@
Usage
-----
- $ superiotool
+ $ superiotool [-d] [-V] [-v] [-h]
-Currently the tool will automatically try to detect which Super I/O you
-have, and also dump the register contents.
+ -d | --dump Dump Super I/O registers
+ -V | --verbose Verbose mode
+ -v | --version Show the superiotool version
+ -h | --help Show a short help text
+
+Per default (no options) superiotool will just probe for a Super I/O
+and print its vendor, name, ID, version, and config port.
+
+Typical usage of superiotool:
+
+ - Probe/detect the Super I/O in your mainboard:
+
+ $ superiotool
+
+ - Detailed register dump of the Super I/O (if detected):
+
+ $ superiotool -d
Supported Super I/O Chips