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tty: tty_driver: introduce TTY driver sub/types enums

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Convert TTY_DRIVER_TYPE_*, and subtype macros to two enums:
tty_driver_type and tty_driver_subtype. This allows for easier
kernel-doc (later), grouping of these nicely, and proper checking.

The tty_driver's ::type and ::subtype now use these enums instead of
bare "short".

Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
Link: https://lore.kernel.org/r/20250317070046.24386-16-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby (SUSE)
2025-03-17 08:00:30 +01:00
committed by Greg Kroah-Hartman
parent 63f3cd5d80
commit 52443558ad
1 changed files with 21 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

42
include/linux/tty_driver.h
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@@ -81,26 +81,26 @@ enum tty_driver_flag {
TTY_DRIVER_UNNUMBERED_NODE = BIT(7),
};
/* tty driver types */
#define TTY_DRIVER_TYPE_SYSTEM 0x0001
#define TTY_DRIVER_TYPE_CONSOLE 0x0002
#define TTY_DRIVER_TYPE_SERIAL 0x0003
#define TTY_DRIVER_TYPE_PTY 0x0004
#define TTY_DRIVER_TYPE_SCC 0x0005 /* scc driver */
#define TTY_DRIVER_TYPE_SYSCONS 0x0006
enum tty_driver_type {
TTY_DRIVER_TYPE_SYSTEM,
TTY_DRIVER_TYPE_CONSOLE,
TTY_DRIVER_TYPE_SERIAL,
TTY_DRIVER_TYPE_PTY,
TTY_DRIVER_TYPE_SCC,
TTY_DRIVER_TYPE_SYSCONS,
};
/* system subtypes (magic, used by tty_io.c) */
#define SYSTEM_TYPE_TTY 0x0001
#define SYSTEM_TYPE_CONSOLE 0x0002
#define SYSTEM_TYPE_SYSCONS 0x0003
#define SYSTEM_TYPE_SYSPTMX 0x0004
enum tty_driver_subtype {
SYSTEM_TYPE_TTY = 1,
SYSTEM_TYPE_CONSOLE,
SYSTEM_TYPE_SYSCONS,
SYSTEM_TYPE_SYSPTMX,
/* pty subtypes (magic, used by tty_io.c) */
#define PTY_TYPE_MASTER 0x0001
#define PTY_TYPE_SLAVE 0x0002
PTY_TYPE_MASTER = 1,
PTY_TYPE_SLAVE,
/* serial subtype definitions */
#define SERIAL_TYPE_NORMAL 1
SERIAL_TYPE_NORMAL = 1,
};
/**
* struct tty_operations -- interface between driver and tty
@@ -500,8 +500,8 @@ struct tty_operations {
* @major: major /dev device number (zero for autoassignment)
* @minor_start: the first minor /dev device number
* @num: number of devices allocated
* @type: type of tty driver (%TTY_DRIVER_TYPE_)
* @subtype: subtype of tty driver (%SYSTEM_TYPE_, %PTY_TYPE_, %SERIAL_TYPE_)
* @type: type of tty driver (enum tty_driver_type)
* @subtype: subtype of tty driver (enum tty_driver_subtype)
* @init_termios: termios to set to each tty initially (e.g. %tty_std_termios)
* @flags: tty driver flags (%TTY_DRIVER_)
* @proc_entry: proc fs entry, used internally
@@ -533,8 +533,8 @@ struct tty_driver {
int major;
int minor_start;
unsigned int num;
short type;
short subtype;
enum tty_driver_type type;
enum tty_driver_subtype subtype;
struct ktermios init_termios;
unsigned long flags;
struct proc_dir_entry *proc_entry;