From a2f6e81c50c177d3bcd53cbc76a11a28169e88c7 Mon Sep 17 00:00:00 2001
From: whitequark <whitequark@whitequark.org>
Date: Sat, 2 Apr 2016 18:20:51 +0000
Subject: [PATCH] ttl: mark constant attributes for TTL{In,InOut,ClockGen}.

---
 artiq/coredevice/ttl.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/artiq/coredevice/ttl.py b/artiq/coredevice/ttl.py
index ef855d6b2..bd917c1de 100644
--- a/artiq/coredevice/ttl.py
+++ b/artiq/coredevice/ttl.py
@@ -10,6 +10,8 @@ class TTLOut:
 
     :param channel: channel number
     """
+    kernel_constant_attributes = {"core", "channel"}
+
     def __init__(self, dmgr, channel, core_device="core"):
         self.core = dmgr.get(core_device)
         self.channel = channel
@@ -82,6 +84,8 @@ class TTLInOut:
 
     :param channel: channel number
     """
+    kernel_constant_attributes = {"core", "channel"}
+
     def __init__(self, dmgr, channel, core_device="core"):
         self.core = dmgr.get(core_device)
         self.channel = channel
@@ -232,6 +236,8 @@ class TTLClockGen:
 
     :param channel: channel number
     """
+    kernel_constant_attributes = {"core", "channel", "acc_width"}
+
     def __init__(self, dmgr, channel, core_device="core"):
         self.core = dmgr.get(core_device)
         self.channel = channel