laforge submitted this change.

Approvals:
  Jenkins Builder: Verified
  laforge: Looks good to me, approved

gateware/icE1usb: Don't let nextpnr promote globals

We manually use global buffers for the signals that need to be
global, don't let nextpnr heuristic mess with things.

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
Change-Id: I5dc5f2f39dca933b2570cbe4e26d9d7fd2a44688
---
M gateware/icE1usb/Makefile
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gateware/icE1usb/Makefile b/gateware/icE1usb/Makefile
index 2bfd1b5..790a1cb 100644
--- a/gateware/icE1usb/Makefile
+++ b/gateware/icE1usb/Makefile
@@ -38,7 +38,7 @@
 
 SEED ?= 15
 YOSYS_SYNTH_ARGS :=
-NEXTPNR_ARGS := --pre-pack data/clocks.py --pre-pack data/opt.py --seed $(SEED)
+NEXTPNR_ARGS := --pre-pack data/clocks.py --pre-pack data/opt.py --seed $(SEED) --no-promote-globals
 
 ifeq ($(IGNORE_TIMING),1)
 	NEXTPNR_ARGS += --timing-allow-fail

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