F15tn: Modify devicetree to fix S3 resume

The way that devicetree.cb was configured for the family 15tn boards
was doing... interesting things to the video device initialization.
This was causing S3 resume to fail.

There is a disconnect between how the devicetree should be configured
if there are multiple HT links on the CPU and how it's configured if
there's only one HT link.  These platforms were set up as if they
had multiple HT links, which was causing duplicate instances of
devices in the device list.

The scan for the IO Hub was removed from the northbridge code which
isn't a problem for F15tn devices.

Change-Id: I3556b43027746e36b07de7cb1bece4d1b37a3c34
Signed-off-by: Martin Roth <martin@se-eng.com>
Reviewed-on: http://review.coreboot.org/2160
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marcj303@gmail.com>

1 files changed, 0 insertions, 23 deletions

diff --git a/src/northbridge/amd/agesa/family15tn/northbridge.c b/src/northbridge/amd/agesa/family15tn/northbridge.c
index 9318164a04..df632e3bf1 100644
--- a/src/northbridge/amd/agesa/family15tn/northbridge.c
+++ b/src/northbridge/amd/agesa/family15tn/northbridge.c
@@ -446,35 +446,12 @@ static void northbridge_init(struct device *dev)
 {
 }
 
-static unsigned scan_chains(device_t dev, unsigned max)
-{
-	unsigned nodeid;
-	struct bus *link;
-	device_t io_hub = NULL;
-	u32 next_unitid = 0x18;
-	nodeid = amdfam15_nodeid(dev);
-	if (nodeid == 0) {
-		for (link = dev->link_list; link; link = link->next) {
-			//if (link->link_num == sblink) { /* devicetree put IO Hub on link_lsit[sblink] */
-			if (link->link_num == 0) { /* devicetree put IO Hub on link_lsit[0] */
-				io_hub = link->children;
-				if (!io_hub || !io_hub->enabled) {
-					die("I can't find the IO Hub, or IO Hub not enabled, please check the device tree.\n");
-				}
-				/* Now that nothing is overlapping it is safe to scan the children. */
-				max = pci_scan_bus(link, 0x00, ((next_unitid - 1) << 3) | 7, 0);
-			}
-		}
-	}
-	return max;
-}
 
 static struct device_operations northbridge_operations = {
 	.read_resources	  = read_resources,
 	.set_resources	  = set_resources,
 	.enable_resources = pci_dev_enable_resources,
 	.init		  = northbridge_init,
-	.scan_bus	  = scan_chains,
 	.enable		  = 0,
 	.ops_pci	  = 0,
 };