From 88649defdad37c33fa0ac39e1b3df9b95c6305a2 Mon Sep 17 00:00:00 2001
From: whitequark <whitequark@whitequark.org>
Date: Sun, 13 Oct 2019 21:56:40 +0000
Subject: [PATCH] vendor.lattice_ice40: use pcf files instead of pre-pack
 Python scripts.

This allows to use nextpnr-ice40 built without Python with nMigen.
Requires nextpnr revision
YosysHQ/nextpnr@8c0610e84fa6a38d3f351774bd81a32c96a91242 or newer.
---
 nmigen/vendor/lattice_ice40.py | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/nmigen/vendor/lattice_ice40.py b/nmigen/vendor/lattice_ice40.py
index 20a844c..163b48e 100644
--- a/nmigen/vendor/lattice_ice40.py
+++ b/nmigen/vendor/lattice_ice40.py
@@ -126,19 +126,14 @@ class LatticeICE40Platform(TemplatedPlatform):
             {{get_override("script_after_synth")|default("# (script_after_synth placeholder)")}}
             write_json {{name}}.json
         """,
-        "{{name}}_pre_pack.py": r"""
-            # {{autogenerated}}
-            {% for signal, frequency in platform.iter_clock_constraints() -%}
-            {# Clock in MHz #}
-            ctx.addClock("{{signal|hierarchy(".")}}", {{frequency/1000000}})
-            {% endfor%}
-            {{get_override("add_pre_pack")|default("# (add_pre_pack placeholder)")}}
-        """,
         "{{name}}.pcf": r"""
             # {{autogenerated}}
             {% for port_name, pin_name, attrs in platform.iter_port_constraints_bits() -%}
                 set_io {{port_name}} {{pin_name}}
             {% endfor %}
+            {% for signal, frequency in platform.iter_clock_constraints() -%}
+                set_frequency "{{signal|hierarchy(".")}}" {{frequency/1000000}}
+            {% endfor%}
             {{get_override("add_constraints")|default("# (add_constraints placeholder)")}}
         """,
     }
-- 
2.30.2