d8a5c0d6a4
The times for close_delay and closing_wait are in centiseconds, not milliseconds. Fix the documentation and add details of special values. Signed-off-by: Simon Arlott <simon@octiron.net> Link: https://lore.kernel.org/r/30fa035a-709f-58cd-fc1e-fef1367dc6dd@0882a8b5-c6c3-11e9-b005-00805fc181fe.uuid.home.arpa Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.0 KiB
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/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/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/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/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/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/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/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/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/close_delay Date: October 2012 Contact: Alan Cox alan@linux.intel.com Description: Show the closing delay time for this port in centiseconds.
These sysfs values expose the TIOCGSERIAL interface via
sysfs rather than via ioctls.
What: /sys/class/tty/ttyS/closing_wait Date: October 2012 Contact: Alan Cox alan@linux.intel.com Description: Show the close wait time for this port in centiseconds.
Waiting forever is represented as 0. If waiting on close is
disabled then the value is 65535.
These sysfs values expose the TIOCGSERIAL interface via
sysfs rather than via ioctls.
What: /sys/class/tty/ttyS/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/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/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/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/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/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.