serial: add Documentation about RS485 serial communications

Documentation about RS485 serial communications

Signed-off-by: Claudio Scordino <claudio@evidence.eu.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Acked-by: Russell King <linux@arm.linux.org.uk>
Acked-by: Grant Edwards <grant.b.edwards@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/Documentation/serial/00-INDEX b/Documentation/serial/00-INDEX
index 07dcdb0d2a36..e09468ad3cb1 100644
--- a/Documentation/serial/00-INDEX
+++ b/Documentation/serial/00-INDEX
@@ -14,6 +14,8 @@ riscom8.txt
         - notes on using the RISCom/8 multi-port serial driver.
 rocket.txt
         - info on the Comtrol RocketPort multiport serial driver.
+serial-rs485.txt
+        - info about RS485 structures and support in the kernel.
 specialix.txt
         - info on hardware/driver for specialix IO8+ multiport serial card.
 stallion.txt