binman: Support lists of external blobs

Sometimes it is useful to have a list of related external blobs in a
single entry. An example is the DDR binaries used by meson. There are
9 files in total. Add support for this, so we don't have to have a
separate entry for each.

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 13 insertions, 3 deletions

diff --git a/tools/binman/etype/blob.py b/tools/binman/etype/blob.py
index fae86ca3ec..8c1b809e8d 100644
--- a/tools/binman/etype/blob.py
+++ b/tools/binman/etype/blob.py
@@ -48,10 +48,10 @@ class Entry_blob(Entry):
         self.ReadBlobContents()
         return True
 
-    def ReadBlobContents(self):
+    def ReadFileContents(self, pathname):
         """Read blob contents into memory
 
-        This function compresses the data before storing if needed.
+        This function compresses the data before returning if needed.
 
         We assume the data is small enough to fit into memory. If this
         is used for large filesystem image that might not be true.
@@ -59,13 +59,23 @@ class Entry_blob(Entry):
         new Entry method which can read in chunks. Then we could copy
         the data in chunks and avoid reading it all at once. For now
         this seems like an unnecessary complication.
+
+        Args:
+            pathname (str): Pathname to read from
+
+        Returns:
+            bytes: Data read
         """
         state.TimingStart('read')
-        indata = tools.ReadFile(self._pathname)
+        indata = tools.ReadFile(pathname)
         state.TimingAccum('read')
         state.TimingStart('compress')
         data = self.CompressData(indata)
         state.TimingAccum('compress')
+        return data
+
+    def ReadBlobContents(self):
+        data = self.ReadFileContents(self._pathname)
         self.SetContents(data)
         return True