add missing clock to I2S pinfunction

diff --git a/src/spec/pinfunctions.py b/src/spec/pinfunctions.py
index 916a718f33d08145fee188161d4be0665c1cdc7f..f1f9558a68005ecbd5dbf2f40f1465d07cd2146e 100644 (file)
--- a/src/spec/pinfunctions.py
+++ b/src/spec/pinfunctions.py
@@ -48,7 +48,7 @@
 
 def i2s(suffix, bank):
     return (['MCK+', 'BCK+', 'LRCK+', 'DI-', 'DO+'],
-            [])
+            [], "MCK")
 
 
 # XXX TODO: correct these.  this is a stub for now