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-rw-r--r--common/fdt_support.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/common/fdt_support.c b/common/fdt_support.c
index 150a3c5..19b2ef6 100644
--- a/common/fdt_support.c
+++ b/common/fdt_support.c
@@ -1195,6 +1195,46 @@ int fdt_alloc_phandle(void *blob)
return phandle + 1;
}
+/*
+ * fdt_create_phandle: Create a phandle property for the given node
+ *
+ * @fdt: ptr to device tree
+ * @nodeoffset: node to update
+ * @phandle: phandle value to set (must be unique)
+*/
+int fdt_create_phandle(void *fdt, int nodeoffset, uint32_t phandle)
+{
+ int ret;
+
+#ifdef DEBUG
+ int off = fdt_node_offset_by_phandle(fdt, phandle);
+
+ if ((off >= 0) && (off != nodeoffset)) {
+ char buf[64];
+
+ fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
+ printf("Trying to update node %s with phandle %u ",
+ buf, phandle);
+
+ fdt_get_path(fdt, off, buf, sizeof(buf));
+ printf("that already exists in node %s.\n", buf);
+ return -FDT_ERR_BADPHANDLE;
+ }
+#endif
+
+ ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * For now, also set the deprecated "linux,phandle" property, so that we
+ * don't break older kernels.
+ */
+ ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
+
+ return ret;
+}
+
#if defined(CONFIG_VIDEO)
int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
{