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-rw-r--r--common/fdt_support.c27
-rw-r--r--include/fdt_support.h2
2 files changed, 29 insertions, 0 deletions
diff --git a/common/fdt_support.c b/common/fdt_support.c
index 70ad81d..718b635 100644
--- a/common/fdt_support.c
+++ b/common/fdt_support.c
@@ -1125,3 +1125,30 @@ u64 fdt_translate_address(void *blob, int node_offset, const u32 *in_addr)
{
return __of_translate_address(blob, node_offset, in_addr, "ranges");
}
+
+/**
+ * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
+ * who's reg property matches a physical cpu address
+ *
+ * @blob: ptr to device tree
+ * @compat: compatiable string to match
+ * @compat_off: property name
+ *
+ */
+int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
+ phys_addr_t compat_off)
+{
+ int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
+ while (off != -FDT_ERR_NOTFOUND) {
+ u32 *reg = (u32 *)fdt_getprop(blob, off, "reg", &len);
+ if (reg) {
+ if (compat_off == fdt_translate_address(blob, off, reg))
+ return off;
+ }
+ off = fdt_node_offset_by_compatible(blob, off, compat);
+ }
+
+ return -FDT_ERR_NOTFOUND;
+}
+
+
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 @@ int fdt_fixup_nor_flash_size(void *blob, int cs, u32 size);
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 */