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| author | Max Filippov <jcmvbkbc@gmail.com> | 2023-10-07 17:18:04 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-10-10 08:51:10 +0200 |
| commit | c7c5be58620a3b1e5fbaf4daea59f2eb6f8fe034 (patch) | |
| tree | c505ec392f1ae6694385978de1230fcc7e0db7c1 /include/uapi | |
| parent | 3047b5b53c36c2cb7874d3823320ffff6a8bf6b3 (diff) | |
| download | linux-stable-c7c5be58620a3b1e5fbaf4daea59f2eb6f8fe034.tar.gz linux-stable-c7c5be58620a3b1e5fbaf4daea59f2eb6f8fe034.tar.bz2 linux-stable-c7c5be58620a3b1e5fbaf4daea59f2eb6f8fe034.zip | |
serial: add PORT_GENERIC definition
Current pattern in the linux kernel is that every new serial driver adds
one or more new PORT_ definitions because uart_ops::config_port()
callback documentation prescribes setting port->type according to the
type of port found, or to PORT_UNKNOWN if no port was detected.
When the specific type of the port is not important to the userspace
there's no need for a unique PORT_ value, but so far there's no suitable
identifier for that case.
Provide generic port type identifier other than PORT_UNKNOWN for ports
which type is not important to userspace.
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Suggested-by: Jiri Slaby <jirislaby@kernel.org>
Reviewed-by: Jiri Slaby <jirislaby@kernel.org>
Link: https://lore.kernel.org/r/20231008001804.889727-1-jcmvbkbc@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/serial_core.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/uapi/linux/serial_core.h b/include/uapi/linux/serial_core.h index 46e06c483899..9c007a106330 100644 --- a/include/uapi/linux/serial_core.h +++ b/include/uapi/linux/serial_core.h @@ -231,4 +231,7 @@ /* Sunplus UART */ #define PORT_SUNPLUS 123 +/* Generic type identifier for ports which type is not important to userspace. */ +#define PORT_GENERIC (-1) + #endif /* _UAPILINUX_SERIAL_CORE_H */ |