From 2b3dda7535c0a5cab83fc58d1cac40338a1f9400 Mon Sep 17 00:00:00 2001
From: David Shah <dave@ds0.me>
Date: Wed, 27 Nov 2019 14:41:35 +0000
Subject: generic: Add support for disabling IOB insertion

Signed-off-by: David Shah <dave@ds0.me>
---
 generic/pack.cc | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'generic/pack.cc')

diff --git a/generic/pack.cc b/generic/pack.cc
index 69f248d2..19266aba 100644
--- a/generic/pack.cc
+++ b/generic/pack.cc
@@ -249,6 +249,10 @@ static void pack_io(Context *ctx)
                         delete_nets.insert(net2->name);
                     }
                 }
+            } else if (bool_or_default(ctx->settings, ctx->id("disable_iobs"))) {
+                // No IO buffer insertion; just remove nextpnr_[io]buf
+                for (auto &p : ci->ports)
+                    disconnect_port(ctx, ci, p.first);
             } else {
                 // Create a GENERIC_IOB buffer
                 std::unique_ptr<CellInfo> ice_cell =
-- 
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