[Qemu-devel] [PATCH 1/2] Introduce qemu_fdt_remove_compatible()

[Pavel Fedin]

Useful for removing devices from the tree

Signed-off-by: Pavel Fedin <address@hidden>
---
 device_tree.c                | 10 ++++++++++
 include/sysemu/device_tree.h | 10 ++++++++++
 2 files changed, 20 insertions(+)

diff --git a/device_tree.c b/device_tree.c
index d2de580..f666df4 100644
--- a/device_tree.c
+++ b/device_tree.c
@@ -350,3 +350,13 @@ out:
     g_free(propcells);
     return ret;
 }
+
+void qemu_fdt_remove_compatible(void *fdt, const char *compatible)
+{
+    int offset = fdt_node_offset_by_compatible(fdt, 0, compatible);
+
+    while (offset >= 0) {
+        fdt_nop_node(fdt, offset);
+        offset = fdt_node_offset_by_compatible(fdt, offset, compatible);
+    }
+}
diff --git a/include/sysemu/device_tree.h b/include/sysemu/device_tree.h
index 359e143..957df9a 100644
--- a/include/sysemu/device_tree.h
+++ b/include/sysemu/device_tree.h
@@ -110,6 +110,16 @@ int qemu_fdt_setprop_sized_cells_from_array(void *fdt,
                                                 qdt_tmp);                 \
     })
 
+/**
+ * qemu_fdt_remove_compatible:
+ * @fdt: device tree blob
+ * @compatible: value of "compatible" property (one of)
+ *
+ * Removes from the device tree all nodes whose "compatible" property
+ * matches the specified value.
+ */
+void qemu_fdt_remove_compatible(void *fdt, const char *compatible);
+
 #define FDT_PCI_RANGE_RELOCATABLE          0x80000000
 #define FDT_PCI_RANGE_PREFETCHABLE         0x40000000
 #define FDT_PCI_RANGE_ALIASED              0x20000000
-- 
1.9.5.msysgit.0