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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /Documentation/ABI/testing/sysfs-tty
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
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Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+What: /sys/class/tty/console/active
+Date: Nov 2010
+Contact: Kay Sievers <kay.sievers@vrfy.org>
+Description:
+ Shows the list of currently configured
+ console devices, like 'tty1 ttyS0'.
+ The last entry in the file is the active
+ device connected to /dev/console.
+ The file supports poll() to detect virtual
+ console switches.
+
+What: /sys/class/tty/tty<x>/active
+Date: Nov 2010
+Contact: Kay Sievers <kay.sievers@vrfy.org>
+Description:
+ Shows the currently active virtual console
+ device, like 'tty1'.
+ The file supports poll() to detect virtual
+ console switches.
+
+What: /sys/class/tty/ttyS<x>/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
+
+ These sysfs values expose the TIOCGSERIAL interface via
+ sysfs rather than via ioctls.
+
+What: /sys/class/tty/ttyS<x>/type
+Date: October 2012
+Contact: Alan Cox <alan@linux.intel.com>
+Description:
+ Shows the current tty type for this port.
+
+ These sysfs values expose the TIOCGSERIAL interface via
+ sysfs rather than via ioctls.
+
+What: /sys/class/tty/ttyS<x>/line
+Date: October 2012
+Contact: Alan Cox <alan@linux.intel.com>
+Description:
+ Shows the current tty line number for this port.
+
+ These sysfs values expose the TIOCGSERIAL interface via
+ sysfs rather than via ioctls.
+
+What: /sys/class/tty/ttyS<x>/port
+Date: October 2012
+Contact: Alan Cox <alan@linux.intel.com>
+Description:
+ Shows the current tty port I/O address for this port.
+
+ These sysfs values expose the TIOCGSERIAL interface via
+ sysfs rather than via ioctls.
+
+What: /sys/class/tty/ttyS<x>/irq
+Date: October 2012
+Contact: Alan Cox <alan@linux.intel.com>
+Description:
+ Shows the current primary interrupt for this port.
+
+ These sysfs values expose the TIOCGSERIAL interface via
+ sysfs rather than via ioctls.
+
+What: /sys/class/tty/ttyS<x>/flags
+Date: October 2012
+Contact: Alan Cox <alan@linux.intel.com>
+Description:
+ Show the tty port status flags for this port.
+
+ These sysfs values expose the TIOCGSERIAL interface via
+ sysfs rather than via ioctls.
+
+What: /sys/class/tty/ttyS<x>/xmit_fifo_size
+Date: October 2012
+Contact: Alan Cox <alan@linux.intel.com>
+Description:
+ Show the transmit FIFO size for this port.
+
+ These sysfs values expose the TIOCGSERIAL interface via
+ sysfs rather than via ioctls.
+
+What: /sys/class/tty/ttyS<x>/close_delay
+Date: October 2012
+Contact: Alan Cox <alan@linux.intel.com>
+Description:
+ Show the closing delay time for this port in ms.
+
+ These sysfs values expose the TIOCGSERIAL interface via
+ sysfs rather than via ioctls.
+
+What: /sys/class/tty/ttyS<x>/closing_wait
+Date: October 2012
+Contact: Alan Cox <alan@linux.intel.com>
+Description:
+ Show the close wait time for this port in ms.
+
+ These sysfs values expose the TIOCGSERIAL interface via
+ sysfs rather than via ioctls.
+
+What: /sys/class/tty/ttyS<x>/custom_divisor
+Date: October 2012
+Contact: Alan Cox <alan@linux.intel.com>
+Description:
+ Show the custom divisor if any that is set on this port.
+
+ These sysfs values expose the TIOCGSERIAL interface via
+ sysfs rather than via ioctls.
+
+What: /sys/class/tty/ttyS<x>/io_type
+Date: October 2012
+Contact: Alan Cox <alan@linux.intel.com>
+Description:
+ Show the I/O type that is to be used with the iomem base
+ address.
+
+ These sysfs values expose the TIOCGSERIAL interface via
+ sysfs rather than via ioctls.
+
+What: /sys/class/tty/ttyS<x>/iomem_base
+Date: October 2012
+Contact: Alan Cox <alan@linux.intel.com>
+Description:
+ The I/O memory base for this port.
+
+ These sysfs values expose the TIOCGSERIAL interface via
+ sysfs rather than via ioctls.
+
+What: /sys/class/tty/ttyS<x>/iomem_reg_shift
+Date: October 2012
+Contact: Alan Cox <alan@linux.intel.com>
+Description:
+ Show the register shift indicating the spacing to be used
+ for accesses on this iomem address.
+
+ These sysfs values expose the TIOCGSERIAL interface via
+ sysfs rather than via ioctls.
+
+What: /sys/class/tty/ttyS<x>/rx_trig_bytes
+Date: May 2014
+Contact: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@hitachi.com>
+Description:
+ Shows current RX interrupt trigger bytes or sets the
+ user specified value to change it for the FIFO buffer.
+ Users can show or set this value regardless of opening the
+ serial device file or not.
+
+ The RX trigger can be set one of four kinds of values for UART
+ serials. When users input a meaning less value to this I/F,
+ the RX trigger is changed to the nearest lower value for the
+ device specification. For example, when user sets 7bytes on
+ 16550A, which has 1/4/8/14 bytes trigger, the RX trigger is
+ automatically changed to 4 bytes.
+
+What: /sys/class/tty/ttyS<x>/console
+Date: February 2020
+Contact: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
+Description:
+ Allows user to detach or attach back the given device as
+ kernel console. It shows and accepts a boolean variable.