Added support for ampopts in APBUART driver. Used in AMP systems.

Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/serial/apbuart.c b/drivers/serial/apbuart.c
index 7160345a184e..767ce9e396c5 100644
--- a/drivers/serial/apbuart.c
+++ b/drivers/serial/apbuart.c
@@ -26,6 +26,7 @@
 #include <linux/of.h>
 #include <linux/of_device.h>
 #include <linux/of_platform.h>
+#include <linux/of_irq.h>
 #include <linux/platform_device.h>
 #include <linux/io.h>
 #include <linux/serial_core.h>
@@ -573,7 +574,6 @@ static int __devinit apbuart_probe(struct platform_device *op,
         printk(KERN_INFO "grlib-apbuart at 0x%llx, irq %d\n",
                (unsigned long long) port->mapbase, port->irq);
         return 0;
-
 }
 
 static struct of_device_id __initdata apbuart_match[] = {
@@ -623,9 +623,12 @@ static void grlib_apbuart_configure(void)
                 int *vendor = (int *) of_get_property(np, "vendor", NULL);
                 int *device = (int *) of_get_property(np, "device", NULL);
                 int *irqs = (int *) of_get_property(np, "interrupts", NULL);
+                int *ampopts = (int *) of_get_property(np, "ampopts", NULL);
                 regs = (struct amba_prom_registers *)
                     of_get_property(np, "reg", NULL);
 
+                if (ampopts && (*ampopts == 0))
+                        continue; /* Ignore if used by another OS instance */
                 if (vendor)
                         v = *vendor;
                 if (device)