From: Scott Wood <scottwood@freescale.com>
Date: Tue, 15 Sep 2015 00:56:03 +0000 (-0500)
Subject: serial: 8250: Add OF earlycon support
X-Git-Tag: firefly_0821_release~176^2~803^2~79
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d05f15707bb7659d2b863fafa1a918f286d74a63;p=firefly-linux-kernel-4.4.55.git

serial: 8250: Add OF earlycon support

This allows earlycon to be used without needing to specify the I/O
address on the kernel command line, if linux,stdout-path is specified
in the chosen node.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/tty/serial/8250/8250_early.c b/drivers/tty/serial/8250/8250_early.c
index faed05f25bc2..ceb85792a5cf 100644
--- a/drivers/tty/serial/8250/8250_early.c
+++ b/drivers/tty/serial/8250/8250_early.c
@@ -29,6 +29,8 @@
 #include <linux/tty.h>
 #include <linux/init.h>
 #include <linux/console.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
 #include <linux/serial_reg.h>
 #include <linux/serial.h>
 #include <linux/serial_8250.h>
@@ -152,3 +154,5 @@ int __init early_serial8250_setup(struct earlycon_device *device,
 }
 EARLYCON_DECLARE(uart8250, early_serial8250_setup);
 EARLYCON_DECLARE(uart, early_serial8250_setup);
+OF_EARLYCON_DECLARE(ns16550, "ns16550", early_serial8250_setup);
+OF_EARLYCON_DECLARE(ns16550a, "ns16550a", early_serial8250_setup);