From 66d5b37cc6d32291419bf99161e83e2946ea5f25 Mon Sep 17 00:00:00 2001
From: Daniel Hellstrom <daniel@gaisler.com>
Date: Wed, 1 Dec 2010 12:11:03 +0100
Subject: [PATCH] GRETH: added option to disable a device node from bootloader.

Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
---
 drivers/net/greth.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

--- a/drivers/net/greth.c
+++ b/drivers/net/greth.c
@@ -1428,6 +1428,12 @@ static int __devinit greth_of_probe(stru
 	int err;
 	int tmp;
 	unsigned long timeout;
+	int *ampopts;
+
+	/* Skip device if used by another OS instance */
+	ampopts = (int *) of_get_property(ofdev->dev.of_node, "ampopts", NULL);
+	if (ampopts && (*ampopts == 0))
+		return -EIO;
 
 	dev = alloc_etherdev(sizeof(struct greth_private));
 
