From 1bd8324535ec1ff44aef55c0e40b9e7d56b310fb Mon Sep 17 00:00:00 2001
From: Lucas Stach <dev@lynxeye.de>
Date: Mon, 3 Nov 2014 23:16:54 +0100
Subject: [PATCH] serial: of-serial: fetch line number from DT
The general agreed way to specify a fixed line number
for a serial console is to provide a "serial" alias
in the devicetree. Start parsing this property in
of_serial.
Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/tty/serial/of_serial.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c
index 8749fb849803cc..7bc163421be420 100644
--- a/drivers/tty/serial/of_serial.c
+++ b/drivers/tty/serial/of_serial.c
@@ -102,6 +102,10 @@ static int of_platform_serial_setup(struct platform_device *ofdev,
if (of_property_read_u32(np, "fifo-size", &prop) == 0)
port->fifosize = prop;
+ /* Check for a fixed line number */
+ if ((ret = of_alias_get_id(np, "serial")) >= 0)
+ port->line = ret;
+
port->irq = irq_of_parse_and_map(np, 0);
port->iotype = UPIO_MEM;
if (of_property_read_u32(np, "reg-io-width", &prop) == 0) {
--
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