From 3c1ab76bbce212cc5b59d560cf60b1decbb64edd Mon Sep 17 00:00:00 2001
From: Florent Kermarrec <florent@enjoy-digital.fr>
Date: Tue, 19 May 2020 13:10:32 +0200
Subject: [PATCH] litedram/common/tXXDController: only set reset to 1 when txxd
 is None.

This avoids triggering a warning/error with Yosys.
---
 litedram/common.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/litedram/common.py b/litedram/common.py
index dcfadb6..5965d95 100644
--- a/litedram/common.py
+++ b/litedram/common.py
@@ -315,7 +315,7 @@ class LiteDRAMNativeReadPort(LiteDRAMNativePort):
 class tXXDController(Module):
     def __init__(self, txxd):
         self.valid = valid = Signal()
-        self.ready = ready = Signal(reset=1)
+        self.ready = ready = Signal(reset=txxd is None)
         ready.attr.add("no_retiming")
 
         # # #