[PATCH v2 4/4] libfdt: Add fdt_setprop_namelen_string()

Macro using fdt_setprop_namelen() internally similar to
`fdt_setprop_string()`.

Reviewed-by: David Gibson <[email protected]>
Signed-off-by: Ayush Singh <[email protected]>
---
 libfdt/libfdt.h | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/libfdt/libfdt.h b/libfdt/libfdt.h
index 127f41a45f40d13e307949e27f3f1b4fbf34fa2c..f2675b12f674b2221273d666d51b8e31f9b4dfbe 100644
--- a/libfdt/libfdt.h
+++ b/libfdt/libfdt.h
@@ -1919,6 +1919,38 @@ static inline int fdt_setprop_cell(void *fdt, int nodeoffset, const char *name,
 #define fdt_setprop_string(fdt, nodeoffset, name, str) \
 	fdt_setprop((fdt), (nodeoffset), (name), (str), strlen(str)+1)
 
+/**
+ * fdt_setprop_namelen_string - set a property to a string value
+ * @fdt: pointer to the device tree blob
+ * @nodeoffset: offset of the node whose property to change
+ * @name: name of the property to change
+ * @namelen: number of characters of name to consider
+ * @str: string value for the property
+ *
+ * fdt_setprop_namelen_string() sets the value of the named property in the
+ * given node to the given string value (using the length of the
+ * string to determine the new length of the property), or creates a
+ * new property with that value if it does not already exist.
+ *
+ * This function may insert or delete data from the blob, and will
+ * therefore change the offsets of some existing nodes.
+ *
+ * returns:
+ *	0, on success
+ *	-FDT_ERR_NOSPACE, there is insufficient free space in the blob to
+ *		contain the new property value
+ *	-FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
+ *	-FDT_ERR_BADLAYOUT,
+ *	-FDT_ERR_BADMAGIC,
+ *	-FDT_ERR_BADVERSION,
+ *	-FDT_ERR_BADSTATE,
+ *	-FDT_ERR_BADSTRUCTURE,
+ *	-FDT_ERR_BADLAYOUT,
+ *	-FDT_ERR_TRUNCATED, standard meanings
+ */
+#define fdt_setprop_namelen_string(fdt, nodeoffset, name, namelen, str)    \
+	fdt_setprop_namelen((fdt), (nodeoffset), (name), (namelen), (str), \
+			    strlen(str) + 1)
 
 /**
  * fdt_setprop_empty - set a property to an empty value

-- 
2.47.1