We already have support for unflattening the devicetree. This patch
adds support for converting it back to a dtb.
Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
---
drivers/of/base.c | 64 +++++++++++++++++++++++++++++++++++++++++++++++++++++
include/of.h | 1 +
2 files changed, 65 insertions(+)
diff --git a/drivers/of/base.c b/drivers/of/base.c
index cb1989d..3307f41 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -24,6 +24,7 @@
#include <malloc.h>
#include <init.h>
#include <memory.h>
+#include <sizes.h>
#include <linux/ctype.h>
/**
@@ -909,6 +910,69 @@ int of_unflatten_dtb(struct fdt_header *fdt)
return 0;
}
+static int __of_flatten_dtb(void *fdt, struct device_node *node)
+{
+ struct property *p;
+ struct device_node *n;
+ int ret;
+
+ ret = fdt_begin_node(fdt, node->name);
+ if (ret)
+ return ret;
+
+ list_for_each_entry(p, &node->properties, list) {
+ ret = fdt_property(fdt, p->name, p->value, p->length);
+ if (ret)
+ return ret;
+ }
+
+ list_for_each_entry(n, &node->children, parent_list) {
+ ret = __of_flatten_dtb(fdt, n);
+ if (ret)
+ return ret;
+ }
+
+ ret = fdt_end_node(fdt);
+
+ return ret;
+}
+
+#define DTB_SIZE SZ_128K
+
+void *of_flatten_dtb(void)
+{
+ void *fdt;
+ int ret;
+
+ if (!root_node)
+ return NULL;
+
+ fdt = malloc(DTB_SIZE);
+ if (!fdt)
+ return NULL;
+
+ ret = fdt_create(fdt, DTB_SIZE);
+ if (ret)
+ goto out_free;
+
+ ret = fdt_finish_reservemap(fdt);
+ if (ret)
+ goto out_free;
+
+ ret = __of_flatten_dtb(fdt, root_node);
+ if (ret)
+ goto out_free;
+
+ fdt_finish(fdt);
+
+ return fdt;
+
+out_free:
+ free(fdt);
+
+ return NULL;
+}
+
int of_device_is_stdout_path(struct device_d *dev)
{
struct device_node *dn;
diff --git a/include/of.h b/include/of.h
index 7682503..80ec447 100644
--- a/include/of.h
+++ b/include/of.h
@@ -109,6 +109,7 @@ int of_probe(void);
int of_parse_dtb(struct fdt_header *fdt);
void of_free(struct device_node *node);
int of_unflatten_dtb(struct fdt_header *fdt);
+void *of_flatten_dtb(void);
int of_property_read_string(struct device_node *np, const char *propname,
const char **out_string);
--
1.7.10.4
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