[Qemu-devel] [PATCH v2 3/8] ppc/pnv: scan ISA bus to populate device tree

["Cédric Le Goater" <clg@kaod.org>]

This is an empty shell that we will use to include nodes in the device
tree for ISA devices. We expect RTC, UART and IPMI BT devices.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
---
 hw/ppc/pnv.c | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c
index 7d742b6e34e1..2d32b20f2d6e 100644
--- a/hw/ppc/pnv.c
+++ b/hw/ppc/pnv.c
@@ -281,6 +281,36 @@ static void powernv_populate_chip(PnvChip *chip, void *fdt)
     g_free(typename);
 }
 
+typedef struct ForeachPopulateArgs {
+    void *fdt;
+    int offset;
+} ForeachPopulateArgs;
+
+static int powernv_populate_isa_device(DeviceState *dev, void *opaque)
+{
+    return 0;
+}
+
+static void powernv_populate_isa(ISABus *bus, void *fdt)
+{
+    int lpc_offset;
+    ForeachPopulateArgs args;
+
+    lpc_offset = fdt_node_offset_by_compatible(fdt, -1, "ibm,lpc");
+    if (lpc_offset < 0) {
+        error_report("Could not find the lpc node !?");
+        return;
+    }
+
+    args.fdt = fdt;
+    args.offset = lpc_offset;
+
+    /* ISA devices are not necessarily parented to the ISA bus so we
+     * can not use object_child_foreach() */
+    qbus_walk_children(BUS(bus), powernv_populate_isa_device,
+                       NULL, NULL, NULL, &args);
+}
+
 static void *powernv_create_fdt(MachineState *machine)
 {
     const char plat_compat[] = "qemu,powernv\0ibm,powernv";
@@ -328,6 +358,8 @@ static void *powernv_create_fdt(MachineState *machine)
     for (i = 0; i < pnv->num_chips; i++) {
         powernv_populate_chip(pnv->chips[i], fdt);
     }
+
+    powernv_populate_isa(pnv->isa_bus, fdt);
     return fdt;
 }
 
-- 
2.7.4