Add functions to create a new device node and to create/set
a new property based on the nodepath.
Signed-off-by: Sascha Hauer <s.ha...@pengutronix.de>
---
drivers/of/base.c | 79 +++++++++++++++++++++++++++++++++++++++++++++++++++++
include/of.h | 3 ++
2 files changed, 82 insertions(+)
diff --git a/drivers/of/base.c b/drivers/of/base.c
index d6c346d..ecc49c4 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -662,6 +662,41 @@ void of_delete_property(struct property *pp)
free(pp);
}
+/**
+ * of_set_property - create a property for a given node
+ * @node - the node
+ * @name - the name of the property
+ * @val - the value for the property
+ * @len - the length of the properties value
+ * @create - if true, the property is created if not existing already
+ */
+int of_set_property(struct device_node *np, const char *name, const void *val,
int len,
+ int create)
+{
+ struct property *pp;
+
+ if (!np)
+ return -ENOENT;
+
+ pp = of_find_property(np, name);
+ if (pp) {
+ void *data;
+
+ free(pp->value);
+ data = xzalloc(len);
+ memcpy(data, val, len);
+ pp->value = data;
+ pp->length = len;
+ } else {
+ if (!create)
+ return -ENOENT;
+
+ pp = of_new_property(np, name, val, len);
+ }
+
+ return 0;
+}
+
static struct device_d *add_of_device(struct device_node *node)
{
struct device_d *dev;
@@ -886,6 +921,50 @@ struct device_node *of_find_child_by_name(struct
device_node *node, const char *
return NULL;
}
+/**
+ * of_create_node - create a new node including its parents
+ * @path - the nodepath to create
+ */
+struct device_node *of_create_node(struct device_node *root, const char *path)
+{
+ char *slash, *p, *freep;
+ struct device_node *tmp, *dn = root;
+
+ if (*path != '/')
+ return NULL;
+
+ path++;
+
+ p = freep = xstrdup(path);
+
+ while (1) {
+ if (!*p)
+ goto out;
+
+ slash = strchr(p, '/');
+ if (slash)
+ *slash = 0;
+
+ tmp = of_find_child_by_name(dn, p);
+ if (tmp)
+ dn = tmp;
+ else
+ dn = of_new_node(dn, p);
+
+ if (!dn)
+ goto out;
+
+ if (!slash)
+ goto out;
+
+ p = slash + 1;
+ }
+out:
+ free(freep);
+
+ return dn;
+}
+
/*
* Parse a flat device tree binary blob and store it in the barebox
* internal tree format,
diff --git a/include/of.h b/include/of.h
index 933e855..12c5703 100644
--- a/include/of.h
+++ b/include/of.h
@@ -124,6 +124,9 @@ void of_delete_property(struct property *pp);
int of_property_read_string(struct device_node *np, const char *propname,
const char **out_string);
+int of_set_property(struct device_node *node, const char *p, const void *val,
int len,
+ int create);
+struct device_node *of_create_node(struct device_node *root, const char *path);
#ifdef CONFIG_OFDEVICE
int of_parse_partitions(const char *cdevname,
--
1.7.10.4
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