dm: core: Add helper to compare node names

Add helper to compare node names.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Link: https://lore.kernel.org/r/20210721155849.20994-2-kishon@ti.com

diff --git a/drivers/core/ofnode.c b/drivers/core/ofnode.c
index dda6c76..701b23e 100644 (file)
--- a/drivers/core/ofnode.c
+++ b/drivers/core/ofnode.c
@@ -18,6 +18,19 @@
 #include <linux/ioport.h>
 #include <asm/global_data.h>
 
+bool ofnode_name_eq(ofnode node, const char *name)
+{
+       const char *node_name;
+       size_t len;
+
+       assert(ofnode_valid(node));
+
+       node_name = ofnode_get_name(node);
+       len = strchrnul(node_name, '@') - node_name;
+
+       return (strlen(name) == len) && !strncmp(node_name, name, len);
+}
+
 int ofnode_read_u32(ofnode node, const char *propname, u32 *outp)
 {
        return ofnode_read_u32_index(node, propname, 0, outp);

diff --git a/include/dm/ofnode.h b/include/dm/ofnode.h
index 3da05d8..4e1a844 100644 (file)
--- a/include/dm/ofnode.h
+++ b/include/dm/ofnode.h
@@ -232,6 +232,16 @@ static inline ofnode ofnode_root(void)
 }
 
 /**
+ * ofnode_name_eq() - Check if the node name is equivalent to a given name
+ *                    ignoring the unit address
+ *
+ * @node:      valid node reference that has to be compared
+ * @name:      name that has to be compared with the node name
+ * @return true if matches, false if it doesn't match
+ */
+bool ofnode_name_eq(ofnode node, const char *name);
+
+/**
  * ofnode_read_u32() - Read a 32-bit integer from a property
  *
  * @ref:       valid node reference to read property from