From: San Mehat Date: Thu, 30 Jul 2009 03:21:28 +0000 (-0700) Subject: serial_core: Add wake_peer uart operation which is called before starting UART TX... X-Git-Tag: firefly_0821_release~9833^2~5^2~264 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=4fa4b98ed94cbe928aab87ef74170cd590d7fcf0;p=firefly-linux-kernel-4.4.55.git 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 --- diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c index cd8511298bcb..076cfd1546d4 100644 --- a/drivers/serial/serial_core.c +++ b/drivers/serial/serial_core.c @@ -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); diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index 563e23400913..7b8a09e2ec7f 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -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