diff --git a/tools/binman/README b/tools/binman/README
index fe734c1..abbf809 100644
--- a/tools/binman/README
+++ b/tools/binman/README
@@ -339,6 +339,10 @@
 	limited by the size of the image/section and the position of the next
 	entry.
 
+compress:
+	Sets the compression algortihm to use (for blobs only). See the entry
+	documentation for details.
+
 The attributes supported for images and sections are described below. Several
 are similar to those for entries.
 
@@ -649,15 +653,16 @@
 -----------
 
 Binman support compression for 'blob' entries (those of type 'blob' and
-derivatives). To enable this for an entry, add a 'compression' property:
+derivatives). To enable this for an entry, add a 'compress' property:
 
     blob {
         filename = "datafile";
-        compression = "lz4";
+        compress = "lz4";
     };
 
 The entry will then contain the compressed data, using the 'lz4' compression
-algorithm. Currently this is the only one that is supported.
+algorithm. Currently this is the only one that is supported. The uncompressed
+size is written to the node in an 'uncomp-size' property, if -u is used.
 
 
 
diff --git a/tools/binman/entry.py b/tools/binman/entry.py
index e1cd0d3..8cccc2e 100644
--- a/tools/binman/entry.py
+++ b/tools/binman/entry.py
@@ -51,6 +51,8 @@
         offset: Offset of entry within the section, None if not known yet (in
             which case it will be calculated by Pack())
         size: Entry size in bytes, None if not known
+        uncomp_size: Size of uncompressed data in bytes, if the entry is
+            compressed, else None
         contents_size: Size of contents in bytes, 0 by default
         align: Entry start offset alignment, or None
         align_size: Entry size alignment, or None
@@ -58,6 +60,7 @@
         pad_before: Number of pad bytes before the contents, 0 if none
         pad_after: Number of pad bytes after the contents, 0 if none
         data: Contents of entry (string of bytes)
+        compress: Compression algoithm used (e.g. 'lz4'), 'none' if none
     """
     def __init__(self, section, etype, node, read_node=True, name_prefix=''):
         self.section = section
@@ -66,6 +69,7 @@
         self.name = node and (name_prefix + node.name) or 'none'
         self.offset = None
         self.size = None
+        self.uncomp_size = None
         self.data = None
         self.contents_size = 0
         self.align = None
@@ -76,6 +80,7 @@
         self.offset_unset = False
         self.image_pos = None
         self._expand_size = False
+        self.compress = 'none'
         if read_node:
             self.ReadNode()
 
@@ -188,6 +193,8 @@
         for prop in ['offset', 'size', 'image-pos']:
             if not prop in self._node.props:
                 state.AddZeroProp(self._node, prop)
+        if self.compress != 'none':
+            state.AddZeroProp(self._node, 'uncomp-size')
         err = state.CheckAddHashProp(self._node)
         if err:
             self.Raise(err)
@@ -198,6 +205,8 @@
         state.SetInt(self._node, 'size', self.size)
         state.SetInt(self._node, 'image-pos',
                        self.image_pos - self.section.GetRootSkipAtStart())
+        if self.uncomp_size is not None:
+            state.SetInt(self._node, 'uncomp-size', self.uncomp_size)
         state.CheckSetHashValue(self._node, self.GetData)
 
     def ProcessFdt(self, fdt):
diff --git a/tools/binman/etype/blob.py b/tools/binman/etype/blob.py
index a91e784..ec94568 100644
--- a/tools/binman/etype/blob.py
+++ b/tools/binman/etype/blob.py
@@ -33,8 +33,7 @@
     def __init__(self, section, etype, node):
         Entry.__init__(self, section, etype, node)
         self._filename = fdt_util.GetString(self._node, 'filename', self.etype)
-        self._compress = fdt_util.GetString(self._node, 'compress', 'none')
-        self._uncompressed_size = None
+        self.compress = fdt_util.GetString(self._node, 'compress', 'none')
 
     def ObtainContents(self):
         self._filename = self.GetDefaultFilename()
@@ -50,21 +49,11 @@
         # the data in chunks and avoid reading it all at once. For now
         # this seems like an unnecessary complication.
         indata = tools.ReadFile(self._pathname)
-        if self._compress != 'none':
-            self._uncompressed_size = len(indata)
-        data = tools.Compress(indata, self._compress)
+        if self.compress != 'none':
+            self.uncomp_size = len(indata)
+        data = tools.Compress(indata, self.compress)
         self.SetContents(data)
         return True
 
     def GetDefaultFilename(self):
         return self._filename
-
-    def AddMissingProperties(self):
-        Entry.AddMissingProperties(self)
-        if self._compress != 'none':
-            state.AddZeroProp(self._node, 'uncomp-size')
-
-    def SetCalculatedProperties(self):
-        Entry.SetCalculatedProperties(self)
-        if self._uncompressed_size is not None:
-            state.SetInt(self._node, 'uncomp-size', self._uncompressed_size)