binman: Automatically include a U-Boot .dtsi file

[u-boot] / tools / dtoc / fdt_util.py

diff --git a/tools/dtoc/fdt_util.py b/tools/dtoc/fdt_util.py
index 6b572483e7fe514b34018a2e35716ad7f1c2e0ba..e6d523b9de65699ec08ebf863b1e614699d16b9c 100644 (file)
--- a/tools/dtoc/fdt_util.py
+++ b/tools/dtoc/fdt_util.py
@@ -6,7 +6,13 @@
 # SPDX-License-Identifier:      GPL-2.0+
 #
 
+import os
 import struct
+import sys
+import tempfile
+
+import command
+import tools
 
 def fdt32_to_cpu(val):
     """Convert a device tree cell to an integer
@@ -17,4 +23,67 @@ def fdt32_to_cpu(val):
     Return:
         A native-endian integer value
     """
-    return struct.unpack(">I", val)[0]
+    if sys.version_info > (3, 0):
+        val = val.encode('raw_unicode_escape')
+    return struct.unpack('>I', val)[0]
+
+def EnsureCompiled(fname):
+    """Compile an fdt .dts source file into a .dtb binary blob if needed.
+
+    Args:
+        fname: Filename (if .dts it will be compiled). It not it will be
+            left alone
+
+    Returns:
+        Filename of resulting .dtb file
+    """
+    _, ext = os.path.splitext(fname)
+    if ext != '.dts':
+        return fname
+
+    dts_input = tools.GetOutputFilename('source.dts')
+    dtb_output = tools.GetOutputFilename('source.dtb')
+
+    search_paths = [os.path.join(os.getcwd(), 'include')]
+    root, _ = os.path.splitext(fname)
+    args = ['-E', '-P', '-x', 'assembler-with-cpp', '-D__ASSEMBLY__']
+    args += ['-Ulinux']
+    for path in search_paths:
+        args.extend(['-I', path])
+    args += ['-o', dts_input, fname]
+    command.Run('cc', *args)
+
+    # If we don't have a directory, put it in the tools tempdir
+    search_list = []
+    for path in search_paths:
+        search_list.extend(['-i', path])
+    args = ['-I', 'dts', '-o', dtb_output, '-O', 'dtb']
+    args.extend(search_list)
+    args.append(dts_input)
+    command.Run('dtc', *args)
+    return dtb_output
+
+def GetInt(node, propname, default=None):
+    prop = node.props.get(propname)
+    if not prop:
+        return default
+    value = fdt32_to_cpu(prop.value)
+    if type(value) == type(list):
+        raise ValueError("Node '%s' property '%' has list value: expecting"
+                         "a single integer" % (node.name, propname))
+    return value
+
+def GetString(node, propname, default=None):
+    prop = node.props.get(propname)
+    if not prop:
+        return default
+    value = prop.value
+    if type(value) == type(list):
+        raise ValueError("Node '%s' property '%' has list value: expecting"
+                         "a single string" % (node.name, propname))
+    return value
+
+def GetBool(node, propname, default=False):
+    if propname in node.props:
+        return True
+    return default