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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.

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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 Colin Cross
parent a9c6ed5b17
commit 4fa4b98ed9
2 changed files with 4 additions and 0 deletions
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3
drivers/serial/serial_core.c
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@ -94,6 +94,9 @@ 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);

1
include/linux/serial_core.h
View File

@ -234,6 +234,7 @@ 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