diff options
| author | San Mehat <san@google.com> | 2009-07-29 20:21:28 -0700 |
|---|---|---|
| committer | John Stultz <john.stultz@linaro.org> | 2016-02-16 13:54:17 -0800 |
| commit | 8f832d4ac1d40e3bf2d142a48ac8cd552ec35a74 (patch) | |
| tree | 8d44cf93e9148c3694759f7e483a92d505b82e75 | |
| parent | 5e9d97718cee92a68540a9fbe8cb27ba1ff55464 (diff) | |
serial_core: Add wake_peer uart operation
Add wake_peer which is called before starting UART TX. The idea here
is to provide a mechanism where we can wakeup our peer before sending
data.
Change-Id: I42e0779b635f64ca99184b45d5b028de80197491
Signed-off-by: San Mehat <san@google.com>
| -rw-r--r-- | drivers/tty/serial/serial_core.c | 3 | ||||
| -rw-r--r-- | include/linux/serial_core.h | 1 |
2 files changed, 4 insertions, 0 deletions
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index def5199ca004..62fe36858a75 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -95,6 +95,9 @@ static void __uart_start(struct tty_struct *tty) struct uart_state *state = tty->driver_data; struct uart_port *port = state->uart_port; + if (port->ops->wake_peer) + port->ops->wake_peer(port); + if (!uart_tx_stopped(port)) port->ops->start_tx(port); } diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index 297d4fa1cfe5..0afc11f8f300 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -66,6 +66,7 @@ struct uart_ops { void (*set_ldisc)(struct uart_port *, struct ktermios *); void (*pm)(struct uart_port *, unsigned int state, unsigned int oldstate); + void (*wake_peer)(struct uart_port *); /* * Return a string describing the type of the port |