Restrict clock promotion to global
diff --git a/ecp5/globals.cc b/ecp5/globals.cc
index 9dd4449..724b0fd 100644
--- a/ecp5/globals.cc
+++ b/ecp5/globals.cc
@@ -435,6 +435,9 @@
log_info("Promoting globals...\n");
auto clocks = get_clocks();
for (auto clock : clocks) {
+ bool is_global = bool_or_default(clock->attrs, ctx->id("ECP5_IS_GLOBAL"), true);
+ if (!is_global)
+ continue;
log_info(" promoting clock net %s to global network\n", clock->name.c_str(ctx));
if (is_ooc) // Don't actually do anything in OOC mode, global routing will be done in the full design
clock->is_global = true;
