dtoc: Move Widen() and GetPhandle() into the base class

These functions are identical in both subclasses. Move them into the base
class.

Note: In fact there is a bug in one version, which was fixed by this patch:

https://patchwork.ozlabs.org/patch/651697/

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

1 files changed, 41 insertions, 0 deletions

diff --git a/tools/dtoc/fdt.py b/tools/dtoc/fdt.py
index 329d03c..964ef7c 100644
--- a/tools/dtoc/fdt.py
+++ b/tools/dtoc/fdt.py
@@ -40,6 +40,47 @@ class PropBase:
         self.name = name
         self.value = None
 
+    def GetPhandle(self):
+        """Get a (single) phandle value from a property
+
+        Gets the phandle valuie from a property and returns it as an integer
+        """
+        return fdt_util.fdt32_to_cpu(self.value[:4])
+
+    def Widen(self, newprop):
+        """Figure out which property type is more general
+
+        Given a current property and a new property, this function returns the
+        one that is less specific as to type. The less specific property will
+        be ble to represent the data in the more specific property. This is
+        used for things like:
+
+            node1 {
+                compatible = "fred";
+                value = <1>;
+            };
+            node1 {
+                compatible = "fred";
+                value = <1 2>;
+            };
+
+        He we want to use an int array for 'value'. The first property
+        suggests that a single int is enough, but the second one shows that
+        it is not. Calling this function with these two propertes would
+        update the current property to be like the second, since it is less
+        specific.
+        """
+        if newprop.type < self.type:
+            self.type = newprop.type
+
+        if type(newprop.value) == list and type(self.value) != list:
+            self.value = [self.value]
+
+        if type(self.value) == list and len(newprop.value) > len(self.value):
+            val = self.GetEmpty(self.type)
+            while len(self.value) < len(newprop.value):
+                self.value.append(val)
+
     def BytesToValue(self, bytes):
         """Converts a string of bytes into a type and value