diff options
| author | San Mehat <san@google.com> | 2011-12-13 01:04:23 +0800 |
|---|---|---|
| committer | Andy Green <andy.green@linaro.org> | 2012-01-09 10:25:05 +0800 |
| commit | 28fe1712c49bed3015aeb6f8ed31c7d47ca00c6e (patch) | |
| tree | af4706508ed1085c03d0e1c4c76c95b314a9b458 | |
| parent | cac6ded3d410652f454c7745b4e6592c808633ac (diff) | |
serial_core: Add wake_peer uart operation which is called before starting UART TX. The idea here is to provide a mechanism where we can wakeup our peer before sending data.
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 0406d7ff505..8fd45f1d8a5 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -91,6 +91,9 @@ 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_circ_empty(&state->xmit) && state->xmit.buf && !tty->stopped && !tty->hw_stopped) port->ops->start_tx(port); diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index eadf33d0abb..11613b38307 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -246,6 +246,7 @@ struct uart_ops { void (*pm)(struct uart_port *, unsigned int state, unsigned int oldstate); int (*set_wake)(struct uart_port *, unsigned int state); + void (*wake_peer)(struct uart_port *); /* * Return a string describing the type of the port |