From a74d5c9d9e3182f2389a832298de39e54cd07428 Mon Sep 17 00:00:00 2001
From: Florent Kermarrec <florent@enjoy-digital.fr>
Date: Mon, 4 Mar 2019 09:21:53 +0100
Subject: [PATCH] common/TXXDcontroller: set ready default value to 1 with
 self.comb instead of reset value

Fix SDRAM build with Yosys
---
 litedram/common.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/litedram/common.py b/litedram/common.py
index f74ecec..cd8c330 100644
--- a/litedram/common.py
+++ b/litedram/common.py
@@ -165,11 +165,12 @@ def cmd_request_rw_layout(a, ba):
 class tXXDController(Module):
     def __init__(self, txxd):
         self.valid = valid = Signal()
-        self.ready = ready = Signal(reset=1)
+        self.ready = ready = Signal()
         ready.attr.add("no_retiming")
 
         # # #
 
+        self.comb += self.ready.eq(1)
         if txxd is not None:
             count = Signal(max=max(txxd, 2))
             self.sync += \