dtoc: Move static functions out of the class

Rather than using static functions within the class, move them out of the
class. This will make it slightly easier for tests to call them.

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

tools/dtoc/dtb_platdata.py

@@ -72,6 +72,60 @@ def tab_to(num_tabs, line):
         return line + ' '
     return line + '\t' * (num_tabs - len(line) // 8)
 
+def get_value(ftype, value):
+    """Get a value as a C expression
+
+    For integers this returns a byte-swapped (little-endian) hex string
+    For bytes this returns a hex string, e.g. 0x12
+    For strings this returns a literal string enclosed in quotes
+    For booleans this return 'true'
+
+    Args:
+        type: Data type (fdt_util)
+        value: Data value, as a string of bytes
+    """
+    if ftype == fdt.TYPE_INT:
+        return '%#x' % fdt_util.fdt32_to_cpu(value)
+    elif ftype == fdt.TYPE_BYTE:
+        return '%#x' % ord(value[0])
+    elif ftype == fdt.TYPE_STRING:
+        return '"%s"' % value
+    elif ftype == fdt.TYPE_BOOL:
+        return 'true'
+
+def get_compat_name(node):
+    """Get a node's first compatible string as a C identifier
+
+    Args:
+        node: Node object to check
+    Return:
+        Tuple:
+            C identifier for the first compatible string
+            List of C identifiers for all the other compatible strings
+                (possibly empty)
+    """
+    compat = node.props['compatible'].value
+    aliases = []
+    if isinstance(compat, list):
+        compat, aliases = compat[0], compat[1:]
+    return conv_name_to_c(compat), [conv_name_to_c(a) for a in aliases]
+
+def is_phandle(prop):
+    """Check if a node contains phandles
+
+    We have no reliable way of detecting whether a node uses a phandle
+    or not. As an interim measure, use a list of known property names.
+
+    Args:
+        prop: Prop object to check
+    Return:
+        True if the object value contains phandles, else False
+    """
+    if prop.name in ['clocks']:
+        return True
+    return False
+
+
 class DtbPlatdata(object):
     """Provide a means to convert device tree binary data to platform data
 
@@ -139,43 +193,6 @@ class DtbPlatdata(object):
         self._lines = []
         return lines
 
-    @staticmethod
-    def get_value(ftype, value):
-        """Get a value as a C expression
-
-        For integers this returns a byte-swapped (little-endian) hex string
-        For bytes this returns a hex string, e.g. 0x12
-        For strings this returns a literal string enclosed in quotes
-        For booleans this return 'true'
-
-        Args:
-            type: Data type (fdt_util)
-            value: Data value, as a string of bytes
-        """
-        if ftype == fdt.TYPE_INT:
-            return '%#x' % fdt_util.fdt32_to_cpu(value)
-        elif ftype == fdt.TYPE_BYTE:
-            return '%#x' % ord(value[0])
-        elif ftype == fdt.TYPE_STRING:
-            return '"%s"' % value
-        elif ftype == fdt.TYPE_BOOL:
-            return 'true'
-
-    @staticmethod
-    def get_compat_name(node):
-        """Get a node's first compatible string as a C identifier
-
-        Args:
-            node: Node object to check
-        Return:
-            C identifier for the first compatible string
-        """
-        compat = node.props['compatible'].value
-        aliases = []
-        if isinstance(compat, list):
-            compat, aliases = compat[0], compat[1:]
-        return conv_name_to_c(compat), [conv_name_to_c(a) for a in aliases]
-
     def scan_dtb(self):
         """Scan the device tree to obtain a tree of notes and properties
 
@@ -219,22 +236,6 @@ class DtbPlatdata(object):
         self._valid_nodes = []
         return self.scan_node(self._fdt.GetRoot())
 
-    @staticmethod
-    def is_phandle(prop):
-        """Check if a node contains phandles
-
-        We have no reliable way of detecting whether a node uses a phandle
-        or not. As an interim measure, use a list of known property names.
-
-        Args:
-            prop: Prop object to check
-        Return:
-            True if the object value contains phandles, else False
-        """
-        if prop.name in ['clocks']:
-            return True
-        return False
-
     def scan_structs(self):
         """Scan the device tree building up the C structures we will use.
 
@@ -248,7 +249,7 @@ class DtbPlatdata(object):
         """
         structs = {}
         for node in self._valid_nodes:
-            node_name, _ = self.get_compat_name(node)
+            node_name, _ = get_compat_name(node)
             fields = {}
 
             # Get a list of all the valid properties in this node.
@@ -272,14 +273,14 @@ class DtbPlatdata(object):
 
         upto = 0
         for node in self._valid_nodes:
-            node_name, _ = self.get_compat_name(node)
+            node_name, _ = get_compat_name(node)
             struct = structs[node_name]
             for name, prop in node.props.items():
                 if name not in PROP_IGNORE_LIST and name[0] != '#':
                     prop.Widen(struct[name])
             upto += 1
 
-            struct_name, aliases = self.get_compat_name(node)
+            struct_name, aliases = get_compat_name(node)
             for alias in aliases:
                 self._aliases[alias] = struct_name
 
@@ -302,7 +303,7 @@ class DtbPlatdata(object):
                 if pname in PROP_IGNORE_LIST or pname[0] == '#':
                     continue
                 if isinstance(prop.value, list):
-                    if self.is_phandle(prop):
+                    if is_phandle(prop):
                         # Process the list as pairs of (phandle, id)
                         value_it = iter(prop.value)
                         for phandle_cell, _ in zip(value_it, value_it):
@@ -326,7 +327,7 @@ class DtbPlatdata(object):
             self.out('struct %s%s {\n' % (STRUCT_PREFIX, name))
             for pname in sorted(structs[name]):
                 prop = structs[name][pname]
-                if self.is_phandle(prop):
+                if is_phandle(prop):
                     # For phandles, include a reference to the target
                     self.out('\t%s%s[%d]' % (tab_to(2, 'struct phandle_2_cell'),
                                              conv_name_to_c(prop.name),
@@ -350,7 +351,7 @@ class DtbPlatdata(object):
         Args:
             node: node to output
         """
-        struct_name, _ = self.get_compat_name(node)
+        struct_name, _ = get_compat_name(node)
         var_name = conv_name_to_c(node.name)
         self.buf('static struct %s%s %s%s = {\n' %
                  (STRUCT_PREFIX, struct_name, VAL_PREFIX, var_name))
@@ -366,7 +367,7 @@ class DtbPlatdata(object):
                 vals = []
                 # For phandles, output a reference to the platform data
                 # of the target node.
-                if self.is_phandle(prop):
+                if is_phandle(prop):
                     # Process the list as pairs of (phandle, id)
                     value_it = iter(prop.value)
                     for phandle_cell, id_cell in zip(value_it, value_it):
@@ -377,11 +378,11 @@ class DtbPlatdata(object):
                         vals.append('{&%s%s, %d}' % (VAL_PREFIX, name, id_num))
                 else:
                     for val in prop.value:
-                        vals.append(self.get_value(prop.type, val))
+                        vals.append(get_value(prop.type, val))
                 self.buf(', '.join(vals))
                 self.buf('}')
             else:
-                self.buf(self.get_value(prop.type, prop.value))
+                self.buf(get_value(prop.type, prop.value))
             self.buf(',\n')
         self.buf('};\n')