Helper functions to setproperty with length of property name similar to
getprop_namelen variants.
Signed-off-by: Ayush Singh <ayush@xxxxxxxxxxxxxxx>
---
libfdt/fdt_rw.c | 19 +++++++++++++++++
libfdt/libfdt.h | 63 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
util.h | 1 +
3 files changed, 83 insertions(+)
diff --git a/libfdt/fdt_rw.c b/libfdt/fdt_rw.c
index 3621d3651d3f4bd82b7af66c60d023e3139add03..9e66c2332bf4d3868c1388c294a195b152b6aefd 100644
--- a/libfdt/fdt_rw.c
+++ b/libfdt/fdt_rw.c
@@ -7,6 +7,8 @@
#include <fdt.h>
#include <libfdt.h>
+#include "../util.h"
+#include <assert.h>
#include "libfdt_internal.h"
@@ -288,6 +290,23 @@ int fdt_setprop(void *fdt, int nodeoffset, const char *name,
return 0;
}
+int fdt_setprop_namelen(void *fdt, int nodeoffset, const char *name,
+ size_t namelen, const void *val, int len)
+{
+ int ret;
+ char *name_temp = xmalloc(namelen + 1);
+
+ assert(namelen <= strlen(name));
+
+ memcpy(name_temp, name, namelen);
+ name_temp[namelen] = '\0';
+ ret = fdt_setprop(fdt, nodeoffset, name_temp, val, len);
+
+ free(name_temp);
+
+ return ret;
+}
+
int fdt_appendprop(void *fdt, int nodeoffset, const char *name,
const void *val, int len)
{
diff --git a/libfdt/libfdt.h b/libfdt/libfdt.h
index 96782bc57b8412d73dff92d6e0ad494ec0a23909..999b3800dff5c001b9c1babf370d45024c81a9aa 100644
--- a/libfdt/libfdt.h
+++ b/libfdt/libfdt.h
@@ -1690,6 +1690,38 @@ int fdt_set_name(void *fdt, int nodeoffset, const char *name);
int fdt_setprop(void *fdt, int nodeoffset, const char *name,
const void *val, int len);
+/**
+ * fdt_setprop_namelen - create or change a property
+ * @fdt: pointer to the device tree blob
+ * @nodeoffset: offset of the node whose property to change
+ * @name: name of the property to change
+ * @namelen: length of the name
+ * @val: pointer to data to set the property value to
+ * @len: length of the property value
+ *
+ * fdt_setprop_namelen() sets the value of the named property in the given
+ * node to the given value and length, creating the property 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
+ */
+int fdt_setprop_namelen(void *fdt, int nodeoffset, const char *name,
+ size_t namelen, const void *val, int len);
+
/**
* fdt_setprop_placeholder - allocate space for a property
* @fdt: pointer to the device tree blob
@@ -1839,6 +1871,37 @@ 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
+ * @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
diff --git a/util.h b/util.h
index 800f2e2c55b150d3c30101d1e1f1daaa0e4e3264..3e2ebaabe1e8c7e9ad6821ac2ca17a72e7f4f57d 100644
--- a/util.h
+++ b/util.h
@@ -6,6 +6,7 @@
#include <stdarg.h>
#include <stdbool.h>
#include <getopt.h>
+#include <stdio.h>
/*
* Copyright 2011 The Chromium Authors, All Rights Reserved.
--
2.47.0
