167 lines
5.0 KiB
Plaintext
167 lines
5.0 KiB
Plaintext
What: /sys/class/tty/console/active
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Date: Nov 2010
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Contact: Kay Sievers <kay.sievers@vrfy.org>
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Description:
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Shows the list of currently configured
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console devices, like 'tty1 ttyS0'.
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The last entry in the file is the active
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device connected to /dev/console.
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The file supports poll() to detect virtual
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console switches.
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What: /sys/class/tty/tty<x>/active
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Date: Nov 2010
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Contact: Kay Sievers <kay.sievers@vrfy.org>
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Description:
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Shows the currently active virtual console
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device, like 'tty1'.
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The file supports poll() to detect virtual
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console switches.
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What: /sys/class/tty/ttyS<x>/uartclk
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Date: Sep 2012
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Contact: Tomas Hlavacek <tmshlvck@gmail.com>
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Description:
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Shows the current uartclk value associated with the
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UART port in serial_core, that is bound to TTY like ttyS0.
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uartclk = 16 * baud_base
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These sysfs values expose the TIOCGSERIAL interface via
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sysfs rather than via ioctls.
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What: /sys/class/tty/ttyS<x>/type
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Date: October 2012
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Contact: Alan Cox <alan@linux.intel.com>
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Description:
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Shows the current tty type for this port.
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These sysfs values expose the TIOCGSERIAL interface via
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sysfs rather than via ioctls.
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What: /sys/class/tty/ttyS<x>/line
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Date: October 2012
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Contact: Alan Cox <alan@linux.intel.com>
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Description:
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Shows the current tty line number for this port.
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These sysfs values expose the TIOCGSERIAL interface via
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sysfs rather than via ioctls.
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What: /sys/class/tty/ttyS<x>/port
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Date: October 2012
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Contact: Alan Cox <alan@linux.intel.com>
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Description:
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Shows the current tty port I/O address for this port.
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These sysfs values expose the TIOCGSERIAL interface via
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sysfs rather than via ioctls.
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What: /sys/class/tty/ttyS<x>/irq
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Date: October 2012
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Contact: Alan Cox <alan@linux.intel.com>
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Description:
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Shows the current primary interrupt for this port.
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These sysfs values expose the TIOCGSERIAL interface via
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sysfs rather than via ioctls.
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What: /sys/class/tty/ttyS<x>/flags
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Date: October 2012
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Contact: Alan Cox <alan@linux.intel.com>
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Description:
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Show the tty port status flags for this port.
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These sysfs values expose the TIOCGSERIAL interface via
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sysfs rather than via ioctls.
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What: /sys/class/tty/ttyS<x>/xmit_fifo_size
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Date: October 2012
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Contact: Alan Cox <alan@linux.intel.com>
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Description:
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Show the transmit FIFO size for this port.
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These sysfs values expose the TIOCGSERIAL interface via
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sysfs rather than via ioctls.
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What: /sys/class/tty/ttyS<x>/close_delay
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Date: October 2012
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Contact: Alan Cox <alan@linux.intel.com>
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Description:
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Show the closing delay time for this port in centiseconds.
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These sysfs values expose the TIOCGSERIAL interface via
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sysfs rather than via ioctls.
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What: /sys/class/tty/ttyS<x>/closing_wait
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Date: October 2012
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Contact: Alan Cox <alan@linux.intel.com>
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Description:
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Show the close wait time for this port in centiseconds.
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Waiting forever is represented as 0. If waiting on close is
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disabled then the value is 65535.
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These sysfs values expose the TIOCGSERIAL interface via
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sysfs rather than via ioctls.
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What: /sys/class/tty/ttyS<x>/custom_divisor
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Date: October 2012
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Contact: Alan Cox <alan@linux.intel.com>
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Description:
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Show the custom divisor if any that is set on this port.
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These sysfs values expose the TIOCGSERIAL interface via
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sysfs rather than via ioctls.
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What: /sys/class/tty/ttyS<x>/io_type
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Date: October 2012
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Contact: Alan Cox <alan@linux.intel.com>
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Description:
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Show the I/O type that is to be used with the iomem base
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address.
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These sysfs values expose the TIOCGSERIAL interface via
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sysfs rather than via ioctls.
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What: /sys/class/tty/ttyS<x>/iomem_base
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Date: October 2012
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Contact: Alan Cox <alan@linux.intel.com>
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Description:
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The I/O memory base for this port.
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These sysfs values expose the TIOCGSERIAL interface via
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sysfs rather than via ioctls.
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What: /sys/class/tty/ttyS<x>/iomem_reg_shift
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Date: October 2012
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Contact: Alan Cox <alan@linux.intel.com>
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Description:
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Show the register shift indicating the spacing to be used
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for accesses on this iomem address.
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These sysfs values expose the TIOCGSERIAL interface via
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sysfs rather than via ioctls.
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What: /sys/class/tty/ttyS<x>/rx_trig_bytes
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Date: May 2014
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Contact: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@hitachi.com>
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Description:
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Shows current RX interrupt trigger bytes or sets the
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user specified value to change it for the FIFO buffer.
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Users can show or set this value regardless of opening the
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serial device file or not.
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The RX trigger can be set one of four kinds of values for UART
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serials. When users input a meaning less value to this I/F,
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the RX trigger is changed to the nearest lower value for the
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device specification. For example, when user sets 7bytes on
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16550A, which has 1/4/8/14 bytes trigger, the RX trigger is
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automatically changed to 4 bytes.
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What: /sys/class/tty/ttyS<x>/console
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Date: February 2020
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Contact: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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Description:
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Allows user to detach or attach back the given device as
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kernel console. It shows and accepts a boolean variable.
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