hw: ppc: sam460ex: Disable Ethernet devicetree nodes

[PATCH] hw: ppc: sam460ex: Disable Ethernet devicetree nodes

Guenter Roeck posted 1 patch 4 years, 5 months ago

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git fetch https://github.com/patchew-project/qemu tags/patchew/20210816025915.213093-1-linux@roeck-us.net

Maintainers: Greg Kurz <groug@kaod.org>, BALATON Zoltan <balaton@eik.bme.hu>, David Gibson <david@gibson.dropbear.id.au>

hw/ppc/sam460ex.c | 8 ++++++++
1 file changed, 8 insertions(+)

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[PATCH] hw: ppc: sam460ex: Disable Ethernet devicetree nodes

Posted by Guenter Roeck 4 years, 5 months ago

IBM EMAC Ethernet controllers are not emulated by qemu. If they are
enabled in devicetree files, they are instantiated in Linux but
obviously won't work. Disable associated devicetree nodes to prevent
unpredictable behavior.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
 hw/ppc/sam460ex.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/hw/ppc/sam460ex.c b/hw/ppc/sam460ex.c
index 0737234d66..feb356e625 100644
--- a/hw/ppc/sam460ex.c
+++ b/hw/ppc/sam460ex.c
@@ -194,6 +194,14 @@ static int sam460ex_load_device_tree(hwaddr addr,
         _FDT(fdt_nop_node(fdt, offset));
     }
 
+    /* Ethernet interfaces are not emulated */
+    offset = fdt_node_offset_by_compatible(fdt, -1, "ibm,emac-460ex");
+    while (offset >= 0) {
+        _FDT(fdt_setprop_string(fdt, offset, "status", "disabled"));
+        offset = fdt_node_offset_by_compatible(fdt, offset, "ibm,emac-460ex");
+    }
+
+
     /* set serial port clocks */
     offset = fdt_node_offset_by_compatible(fdt, -1, "ns16550");
     while (offset >= 0) {
-- 
2.25.1