Documentation/ABI/testing/sysfs-tty

   1 What:           /sys/class/tty/console/active
   2 Date:           Nov 2010
   3 Contact:        Kay Sievers <kay.sievers@vrfy.org>
   4 Description:
   5                  Shows the list of currently configured
   6                  console devices, like 'tty1 ttyS0'.
   7                  The last entry in the file is the active
   8                  device connected to /dev/console.
   9                  The file supports poll() to detect virtual
  10                  console switches.
  11
  12 What:           /sys/class/tty/tty0/active
  13 Date:           Nov 2010
  14 Contact:        Kay Sievers <kay.sievers@vrfy.org>
  15 Description:
  16                  Shows the currently active virtual console
  17                  device, like 'tty1'.
  18                  The file supports poll() to detect virtual
  19                  console switches.
  20
  21 What:           /sys/class/tty/ttyS0/uartclk
  22 Date:           Sep 2012
  23 Contact:        Tomas Hlavacek <tmshlvck@gmail.com>
  24 Description:
  25                  Shows the current uartclk value associated with the
  26                  UART port in serial_core, that is bound to TTY like ttyS0.
  27                  uartclk = 16 * baud_base
  28