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authorSimon Glass <sjg@chromium.org>2017-08-29 14:15:46 -0600
committerSimon Glass <sjg@chromium.org>2017-09-15 05:24:39 -0600
commit93c94b889b3aa7e21e0f90f0c5a6dc7034b371aa (patch)
tree3ff27de14cfe84fac4a45247b72d57573aa7df4a /lib/libfdt
parentae1c0a38c8b163d685121e3109161da7ac1caacd (diff)
fdt: Sync libfdt up to upstream
Add upstream changes to U-Boot: - new pylibfdt functions - fdt_setprop_placeholder() Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'lib/libfdt')
-rw-r--r--lib/libfdt/fdt_rw.c20
-rw-r--r--lib/libfdt/libfdt.h31
-rw-r--r--lib/libfdt/pylibfdt/libfdt.i58
3 files changed, 106 insertions, 3 deletions
diff --git a/lib/libfdt/fdt_rw.c b/lib/libfdt/fdt_rw.c
index 80a3212141..3dc775261f 100644
--- a/lib/libfdt/fdt_rw.c
+++ b/lib/libfdt/fdt_rw.c
@@ -228,8 +228,8 @@ int fdt_set_name(void *fdt, int nodeoffset, const char *name)
return 0;
}
-int fdt_setprop(void *fdt, int nodeoffset, const char *name,
- const void *val, int len)
+int fdt_setprop_placeholder(void *fdt, int nodeoffset, const char *name,
+ int len, void **prop_data)
{
struct fdt_property *prop;
int err;
@@ -242,8 +242,22 @@ int fdt_setprop(void *fdt, int nodeoffset, const char *name,
if (err)
return err;
+ *prop_data = prop->data;
+ return 0;
+}
+
+int fdt_setprop(void *fdt, int nodeoffset, const char *name,
+ const void *val, int len)
+{
+ void *prop_data;
+ int err;
+
+ err = fdt_setprop_placeholder(fdt, nodeoffset, name, len, &prop_data);
+ if (err)
+ return err;
+
if (len)
- memcpy(prop->data, val, len);
+ memcpy(prop_data, val, len);
return 0;
}
diff --git a/lib/libfdt/libfdt.h b/lib/libfdt/libfdt.h
index f3f9cad184..6af94cb3f7 100644
--- a/lib/libfdt/libfdt.h
+++ b/lib/libfdt/libfdt.h
@@ -1405,6 +1405,37 @@ int fdt_setprop(void *fdt, int nodeoffset, const char *name,
const void *val, int len);
/**
+ * fdt_setprop _placeholder - allocate space for 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
+ * @len: length of the property value
+ * @prop_data: return pointer to property data
+ *
+ * fdt_setprop_placeholer() allocates the named property in the given node.
+ * If the property exists it is resized. In either case a pointer to the
+ * property data is returned.
+ *
+ * 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_placeholder(void *fdt, int nodeoffset, const char *name,
+ int len, void **prop_data);
+
+/**
* fdt_setprop_u32 - set a property to a 32-bit integer
* @fdt: pointer to the device tree blob
* @nodeoffset: offset of the node whose property to change
diff --git a/lib/libfdt/pylibfdt/libfdt.i b/lib/libfdt/pylibfdt/libfdt.i
index 146f4b942a..5b1a8cf4d4 100644
--- a/lib/libfdt/pylibfdt/libfdt.i
+++ b/lib/libfdt/pylibfdt/libfdt.i
@@ -130,6 +130,23 @@ class Fdt:
self._fdt = bytearray(data)
check_err(fdt_check_header(self._fdt));
+ def subnode_offset(self, parentoffset, name, quiet=()):
+ """Get the offset of a named subnode
+
+ Args:
+ parentoffset: Offset of the parent node to check
+ name: Name of the required subnode, e.g. 'subnode@1'
+ quiet: Errors to ignore (empty to raise on all errors)
+
+ Returns:
+ The node offset of the found node, if any
+
+ Raises
+ FdtException if there is no node with that name, or other error
+ """
+ return check_err(fdt_subnode_offset(self._fdt, parentoffset, name),
+ quiet)
+
def path_offset(self, path, quiet=()):
"""Get the offset for a given path
@@ -304,6 +321,47 @@ class Fdt:
return pdata
return bytearray(pdata[0])
+ def get_phandle(self, nodeoffset):
+ """Get the phandle of a node
+
+ Args:
+ nodeoffset: Node offset to check
+
+ Returns:
+ phandle of node, or 0 if the node has no phandle or another error
+ occurs
+ """
+ return fdt_get_phandle(self._fdt, nodeoffset)
+
+ def parent_offset(self, nodeoffset, quiet=()):
+ """Get the offset of a node's parent
+
+ Args:
+ nodeoffset: Node offset to check
+ quiet: Errors to ignore (empty to raise on all errors)
+
+ Returns:
+ The offset of the parent node, if any
+
+ Raises:
+ FdtException if no parent found or other error occurs
+ """
+ return check_err(fdt_parent_offset(self._fdt, nodeoffset), quiet)
+
+ def node_offset_by_phandle(self, phandle, quiet=()):
+ """Get the offset of a node with the given phandle
+
+ Args:
+ phandle: Phandle to search for
+ quiet: Errors to ignore (empty to raise on all errors)
+
+ Returns:
+ The offset of node with that phandle, if any
+
+ Raises:
+ FdtException if no node found or other error occurs
+ """
+ return check_err(fdt_node_offset_by_phandle(self._fdt, phandle), quiet)
class Property:
"""Holds a device tree property name and value.