tty: uartclk value from serial_core exposed to sysfs

[linux-2.6-block.git] / Documentation / ABI / testing / sysfs-tty

diff --git a/Documentation/ABI/testing/sysfs-tty b/Documentation/ABI/testing/sysfs-tty
index b138b663bf54cf545dabb88e4a158874c5d8a785..0c430150d92976260c5b40a4b4c9fedd1600fa9d 100644 (file)
--- a/Documentation/ABI/testing/sysfs-tty
+++ b/Documentation/ABI/testing/sysfs-tty
@@ -17,3 +17,12 @@ Description:
                 device, like 'tty1'.
                 The file supports poll() to detect virtual
                 console switches.
+
+What:          /sys/class/tty/ttyS0/uartclk
+Date:          Sep 2012
+Contact:       Tomas Hlavacek <tmshlvck@gmail.com>
+Description:
+                Shows the current uartclk value associated with the
+                UART port in serial_core, that is bound to TTY like ttyS0.
+                uartclk = 16 * baud_base
+