[PATCH] doc: more serial-console info

Add info on flow control for serial consoles.  Refer to netconsole option
also.

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 10 insertions, 5 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 44a25f3f51d1..f8cb55c30b0f 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -367,12 +367,17 @@ running once the system is up.
                 tty<n>  Use the virtual console device <n>.
 
                 ttyS<n>[,options]
+                ttyUSB0[,options]
                         Use the specified serial port.  The options are of
-                        the form "bbbbpn", where "bbbb" is the baud rate,
-                        "p" is parity ("n", "o", or "e"), and "n" is bits.
-                        Default is "9600n8".
-
-                        See also Documentation/serial-console.txt.
+                        the form "bbbbpnf", where "bbbb" is the baud rate,
+                        "p" is parity ("n", "o", or "e"), "n" is number of
+                        bits, and "f" is flow control ("r" for RTS or
+                        omit it).  Default is "9600n8".
+
+                        See Documentation/serial-console.txt for more
+                        information.  See
+                        Documentation/networking/netconsole.txt for an
+                        alternative.
 
                 uart,io,<addr>[,options]
                 uart,mmio,<addr>[,options]