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serial_core: Add wake_peer uart operation

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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>
This commit is contained in:
San Mehat 2009-07-29 20:21:28 -07:00 committed by John Stultz
parent 5e9d97718c
commit 8f832d4ac1
2 changed files with 4 additions and 0 deletions
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3
drivers/tty/serial/serial_core.c
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@ -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);
}

1
include/linux/serial_core.h
View File

@ -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