diff options
| -rw-r--r-- | Documentation/driver-api/tty/tty_driver.rst | 2 | ||||
| -rw-r--r-- | include/linux/tty_driver.h | 40 |
2 files changed, 25 insertions, 17 deletions
diff --git a/Documentation/driver-api/tty/tty_driver.rst b/Documentation/driver-api/tty/tty_driver.rst index cc529f863406..f6cbffdb6e01 100644 --- a/Documentation/driver-api/tty/tty_driver.rst +++ b/Documentation/driver-api/tty/tty_driver.rst @@ -35,7 +35,7 @@ Here comes the documentation of flags accepted by tty_alloc_driver() (or __tty_alloc_driver()): .. kernel-doc:: include/linux/tty_driver.h - :doc: TTY Driver Flags + :identifiers: tty_driver_flag ---- diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h index f3be6d56e9e5..d0d940236580 100644 --- a/include/linux/tty_driver.h +++ b/include/linux/tty_driver.h @@ -17,13 +17,19 @@ struct serial_icounter_struct; struct serial_struct; /** - * DOC: TTY Driver Flags + * enum tty_driver_flag -- TTY Driver Flags * - * TTY_DRIVER_RESET_TERMIOS + * These are flags passed to tty_alloc_driver(). + * + * @TTY_DRIVER_INSTALLED: + * Whether this driver was succesfully installed. This is a tty internal + * flag. Do not touch. + * + * @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 + * @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: * @@ -35,7 +41,7 @@ struct serial_struct; * 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 + * @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 @@ -45,33 +51,35 @@ struct serial_struct; * appear and disappear while the main tty driver is registered with the * tty core. * - * TTY_DRIVER_DEVPTS_MEM + * @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 + * @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 + * @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 + * @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 -#define TTY_DRIVER_REAL_RAW 0x0004 -#define TTY_DRIVER_DYNAMIC_DEV 0x0008 -#define TTY_DRIVER_DEVPTS_MEM 0x0010 -#define TTY_DRIVER_HARDWARE_BREAK 0x0020 -#define TTY_DRIVER_DYNAMIC_ALLOC 0x0040 -#define TTY_DRIVER_UNNUMBERED_NODE 0x0080 +enum tty_driver_flag { + TTY_DRIVER_INSTALLED = BIT(0), + TTY_DRIVER_RESET_TERMIOS = BIT(1), + TTY_DRIVER_REAL_RAW = BIT(2), + TTY_DRIVER_DYNAMIC_DEV = BIT(3), + TTY_DRIVER_DEVPTS_MEM = BIT(4), + TTY_DRIVER_HARDWARE_BREAK = BIT(5), + TTY_DRIVER_DYNAMIC_ALLOC = BIT(6), + TTY_DRIVER_UNNUMBERED_NODE = BIT(7), +}; /* tty driver types */ #define TTY_DRIVER_TYPE_SYSTEM 0x0001 |