From a9ed3aa9b87ee41e8ab3ff471b1331c154767e45 Mon Sep 17 00:00:00 2001 From: Dave Airlie Date: Sat, 26 Sep 2026 07:57:59 +1000 Subject: Merge tag 'drm-misc-fixes-2026-09-24' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-fixes A number of fixes: - bridge: - samsung-dsim: fix GPIO lifetime - client: Null pointer dereference fix - imagination: error handling fix, page handling fix - nouveau: fix reference leaks, double-frees, out-of-bounds accesses, use-after-frees, don't reject config without SCDC, a number of workarounds - virtio: fix memory leak, reference leaks, null pointer dereference, add pixel blend mode, cache coherency fix Signed-off-by: Dave Airlie From: Maxime Ripard Link: https://patch.msgid.link/arU22zzqUGDEco1y@houat --- Documentation/ABI/testing/sysfs-tty | 166 ++++++++++++++++++++++++++++++++++++ 1 file changed, 166 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-tty (limited to 'Documentation/ABI/testing/sysfs-tty') diff --git a/Documentation/ABI/testing/sysfs-tty b/Documentation/ABI/testing/sysfs-tty new file mode 100644 index 000000000..895c47f05 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-tty @@ -0,0 +1,166 @@ +What: /sys/class/tty/console/active +Date: Nov 2010 +Contact: Kay Sievers +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 +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 +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 +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 +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 +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 +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 +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 +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 +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 +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 +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 +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 +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 +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 +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 +Description: + Allows user to detach or attach back the given device as + kernel console. It shows and accepts a boolean variable. -- cgit v1.3.1