From 3e1e203d35d2929bc7af20fa1f56617db6a40258 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Jean-Fran=C3=A7ois=20Nguyen?= <jf@lambdaconcept.com>
Date: Mon, 28 Jun 2021 19:49:27 +0200
Subject: [PATCH] soc.base: add socproperty(weak=True) for optional properties.

---
 lambdasoc/soc/base.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lambdasoc/soc/base.py b/lambdasoc/soc/base.py
index 79cb6c2..ceb3663 100644
--- a/lambdasoc/soc/base.py
+++ b/lambdasoc/soc/base.py
@@ -14,14 +14,14 @@ from ..periph import Peripheral
 __all__ = ["socproperty", "SoC", "ConfigBuilder"]
 
 
-def socproperty(cls, src_loc_at=0):
+def socproperty(cls, *, weak=False, src_loc_at=0):
     name   = tracer.get_var_name(depth=2 + src_loc_at)
     __name = "__{}".format(name)
 
     def getter(self):
         assert isinstance(self, SoC)
         attr = getattr(self, __name, None)
-        if attr is None:
+        if attr is None and not weak:
             raise NotImplementedError("SoC {!r} does not have a {}"
                                       .format(self, name))
         return attr
-- 
2.30.2