| 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/tty0/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/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 |
| |
| These sysfs values expose the TIOCGSERIAL interface via |
| sysfs rather than via ioctls. |
| |
| What: /sys/class/tty/ttyS0/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/ttyS0/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/ttyS0/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/ttyS0/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/ttyS0/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/ttyS0/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/ttyS0/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/ttyS0/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/ttyS0/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/ttyS0/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/ttyS0/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/ttyS0/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/ttyS0/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. |