From 05167fcb8bf9cd85ea605331ca36cac6f25ce67f Mon Sep 17 00:00:00 2001
From: gatecat <gatecat@ds0.me>
Date: Thu, 18 Aug 2022 15:09:41 +0200
Subject: pybindings: Mark CellInfo::bel as readonly

bel bindings should be updated with bindBel/unbindBel during placement, or setting the BEL attribute for constraints before placement.

Fixes #522

Signed-off-by: gatecat <gatecat@ds0.me>
---
 common/kernel/pybindings.cc | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/common/kernel/pybindings.cc b/common/kernel/pybindings.cc
index 9a783eb4..f738f081 100644
--- a/common/kernel/pybindings.cc
+++ b/common/kernel/pybindings.cc
@@ -191,8 +191,7 @@ PYBIND11_EMBEDDED_MODULE(MODULE_NAME, m)
             ci_cls, "params");
     readonly_wrapper<CellInfo &, decltype(&CellInfo::ports), &CellInfo::ports, wrap_context<PortMap &>>::def_wrap(
             ci_cls, "ports");
-    readwrite_wrapper<CellInfo &, decltype(&CellInfo::bel), &CellInfo::bel, conv_to_str<BelId>,
-                      conv_from_str<BelId>>::def_wrap(ci_cls, "bel");
+    readonly_wrapper<CellInfo &, decltype(&CellInfo::bel), &CellInfo::bel, conv_to_str<BelId>>::def_wrap(ci_cls, "bel");
     readwrite_wrapper<CellInfo &, decltype(&CellInfo::belStrength), &CellInfo::belStrength, pass_through<PlaceStrength>,
                       pass_through<PlaceStrength>>::def_wrap(ci_cls, "belStrength");
 
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