binman: Expand documentation for entries

[oweals/u-boot.git] / tools / binman / etype / u_boot_spl_dtb.py

diff --git a/tools/binman/etype/u_boot_spl_dtb.py b/tools/binman/etype/u_boot_spl_dtb.py
index eefa1ff53a4ad9c69215f1e67eb2cfc9f369e413..6a30edc83c88bdf58e42635400fcccb89b9ba364 100644 (file)
--- a/tools/binman/etype/u_boot_spl_dtb.py
+++ b/tools/binman/etype/u_boot_spl_dtb.py
@@ -9,6 +9,15 @@ from entry import Entry
 from blob import Entry_blob
 
 class Entry_u_boot_spl_dtb(Entry_blob):
+    """U-Boot SPL device tree
+
+    Properties / Entry arguments:
+        - filename: Filename of u-boot.dtb (default 'spl/u-boot-spl.dtb')
+
+    This is the SPL device tree, containing configuration information for
+    SPL. SPL needs this to know what devices are present and which drivers
+    to activate.
+    """
     def __init__(self, section, etype, node):
         Entry_blob.__init__(self, section, etype, node)