From da4651ff190c6447b94f8f3c41e1375050859eae Mon Sep 17 00:00:00 2001
From: Florent Kermarrec <florent@enjoy-digital.fr>
Date: Thu, 8 Mar 2018 08:33:31 +0100
Subject: [PATCH] phy/kusddrphy: add comment

---
 litedram/phy/kusddrphy.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/litedram/phy/kusddrphy.py b/litedram/phy/kusddrphy.py
index 3be082e..ba85c62 100644
--- a/litedram/phy/kusddrphy.py
+++ b/litedram/phy/kusddrphy.py
@@ -161,6 +161,8 @@ class KUSDDRPHY(Module, AutoCSR):
             dqs_delayed = Signal()
             dqs_t = Signal()
             if i == 0:
+                # Store initial DQS DELAY_VALUE (in taps) to
+                # be able to reload DELAY_VALUE after reset.
                 dqs_taps = Signal(9)
                 dqs_taps_timer = WaitTimer(2**16)
                 self.submodules += dqs_taps_timer