fdt: Add fdt_node_offset_by_compat_reg helper
Given a compatible string and physical address try and find a node that
matches. This is useful when we want to find a specific device node to
update (for example if we have multiple PCI nodes we can use the
physical address to distinguish them when trying to update the device
tree).
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Gerald Van Baren <vanbaren@cideas.com>
diff --git a/include/fdt_support.h b/include/fdt_support.h
index 78c38b2..54af9fe 100644
--- a/include/fdt_support.h
+++ b/include/fdt_support.h
@@ -84,6 +84,8 @@
void fdt_fixup_mtdparts(void *fdt, void *node_info, int node_info_size);
void fdt_del_node_and_alias(void *blob, const char *alias);
u64 fdt_translate_address(void *blob, int node_offset, const u32 *in_addr);
+int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
+ phys_addr_t compat_off);
#endif /* ifdef CONFIG_OF_LIBFDT */
#endif /* ifndef __FDT_SUPPORT_H */