diff options
| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-04-17 17:23:14 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-11-04 11:25:56 +0000 |
| commit | 9aba8d5b011193c8e01d565c5b585df5b94f1db2 (patch) | |
| tree | 4f45580d7310ea7ea7dba87a237732f0580ecb36 /include/linux/serial_core.h | |
| parent | dba05832cbe4f305dfd998fb26d7c685d91fbbd8 (diff) | |
SERIAL: core: add throttle/unthrottle callbacks for hardware assisted flow control
Add two callbacks for hardware assisted flow control; we need to know
when the tty layers want us to stop and restart due to their buffer
levels.
Call a driver specific throttle/unthrottle function if and only if the
driver indicates that it is using an enabled hardware assisted flow
control method, otherwise fall back to the non-hardware assisted
methods.
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'include/linux/serial_core.h')
| -rw-r--r-- | include/linux/serial_core.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index e2cda5d04e48..c6690a2a27fb 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -46,6 +46,8 @@ struct uart_ops { unsigned int (*get_mctrl)(struct uart_port *); void (*stop_tx)(struct uart_port *); void (*start_tx)(struct uart_port *); + void (*throttle)(struct uart_port *); + void (*unthrottle)(struct uart_port *); void (*send_xchar)(struct uart_port *, char ch); void (*stop_rx)(struct uart_port *); void (*enable_ms)(struct uart_port *); |