tty: reformat TTY_DRIVER_ flags into kernel-doc

We want to reference TTY_DRIVER_* flags in Documentation/ later in this
series. But the current documentation in the TTY_DRIVER_*'s header does
not allow that. Reformat it to kernel-doc using "DOC" directive and
line-feeds, so that we can include it as it is.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20211126081611.11001-11-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h
index 41274d551e2869ee7b56445ac8d8d0a7118cb1f9..4841d8069c072bae22e7936be443b30f64148e1c 100644 (file)
--- a/include/linux/tty_driver.h
+++ b/include/linux/tty_driver.h
@@ -492,49 +492,53 @@ static inline void tty_set_operations(struct tty_driver *driver,
 /* tty driver magic number */
 #define TTY_DRIVER_MAGIC               0x5402
 
-/*
- * tty driver flags
- * 
- * TTY_DRIVER_RESET_TERMIOS --- requests the tty layer to reset the
- *     termios setting when the last process has closed the device.
- *     Used for PTY's, in particular.
- * 
- * TTY_DRIVER_REAL_RAW --- if set, indicates that the driver will
- *     guarantee never to set any special character handling
- *     flags if ((IGNBRK || (!BRKINT && !PARMRK)) && (IGNPAR ||
- *     !INPCK)).  That is, if there is no reason for the driver to
- *     send notifications of parity and break characters up to the
- *     line driver, it won't do so.  This allows the line driver to
- *     optimize for this case if this flag is set.  (Note that there
- *     is also a promise, if the above case is true, not to signal
- *     overruns, either.)
- *
- * TTY_DRIVER_DYNAMIC_DEV --- if set, the individual tty devices need
- *     to be registered with a call to tty_register_device() when the
- *     device is found in the system and unregistered with a call to
- *     tty_unregister_device() so the devices will be show up
- *     properly in sysfs.  If not set, driver->num entries will be
- *     created by the tty core in sysfs when tty_register_driver() is
- *     called.  This is to be used by drivers that have tty devices
- *     that can appear and disappear while the main tty driver is
- *     registered with the tty core.
- *
- * TTY_DRIVER_DEVPTS_MEM -- don't use the standard arrays, instead
- *     use dynamic memory keyed through the devpts filesystem.  This
- *     is only applicable to the pty driver.
- *
- * TTY_DRIVER_HARDWARE_BREAK -- hardware handles break signals. Pass
- *     the requested timeout to the caller instead of using a simple
- *     on/off interface.
- *
- * TTY_DRIVER_DYNAMIC_ALLOC -- do not allocate structures which are
- *     needed per line for this driver as it would waste memory.
- *     The driver will take care.
- *
- * TTY_DRIVER_UNNUMBERED_NODE -- do not create numbered /dev nodes. In
- *     other words create /dev/ttyprintk and not /dev/ttyprintk0.
- *     Applicable only when a driver for a single tty device is
- *     being allocated.
+/**
+ * DOC: TTY Driver Flags
+ *
+ * TTY_DRIVER_RESET_TERMIOS
+ *     Requests the tty layer to reset the termios setting when the last
+ *     process has closed the device. Used for PTYs, in particular.
+ *
+ * TTY_DRIVER_REAL_RAW
+ *     Indicates that the driver will guarantee not to set any special
+ *     character handling flags if this is set for the tty:
+ *
+ *     ``(IGNBRK || (!BRKINT && !PARMRK)) && (IGNPAR || !INPCK)``
+ *
+ *     That is, if there is no reason for the driver to
+ *     send notifications of parity and break characters up to the line
+ *     driver, it won't do so.  This allows the line driver to optimize for
+ *     this case if this flag is set.  (Note that there is also a promise, if
+ *     the above case is true, not to signal overruns, either.)
+ *
+ * TTY_DRIVER_DYNAMIC_DEV
+ *     The individual tty devices need to be registered with a call to
+ *     tty_register_device() when the device is found in the system and
+ *     unregistered with a call to tty_unregister_device() so the devices will
+ *     be show up properly in sysfs.  If not set, all &tty_driver.num entries
+ *     will be created by the tty core in sysfs when tty_register_driver() is
+ *     called.  This is to be used by drivers that have tty devices that can
+ *     appear and disappear while the main tty driver is registered with the
+ *     tty core.
+ *
+ * TTY_DRIVER_DEVPTS_MEM
+ *     Don't use the standard arrays (&tty_driver.ttys and
+ *     &tty_driver.termios), instead use dynamic memory keyed through the
+ *     devpts filesystem. This is only applicable to the PTY driver.
+ *
+ * TTY_DRIVER_HARDWARE_BREAK
+ *     Hardware handles break signals. Pass the requested timeout to the
+ *     &tty_operations.break_ctl instead of using a simple on/off interface.
+ *
+ * TTY_DRIVER_DYNAMIC_ALLOC
+ *     Do not allocate structures which are needed per line for this driver
+ *     (&tty_driver.ports) as it would waste memory. The driver will take
+ *     care. This is only applicable to the PTY driver.
+ *
+ * TTY_DRIVER_UNNUMBERED_NODE
+ *     Do not create numbered ``/dev`` nodes. For example, create
+ *     ``/dev/ttyprintk`` and not ``/dev/ttyprintk0``. Applicable only when a
+ *     driver for a single tty device is being allocated.
  */
 #define TTY_DRIVER_INSTALLED           0x0001
 #define TTY_DRIVER_RESET_TERMIOS       0x0002