From 170bf8a5ecb9e0806a2ddafc6f7dd8007b21f481 Mon Sep 17 00:00:00 2001 From: David Shah Date: Sat, 9 Feb 2019 10:31:24 +0000 Subject: ice40: Don't create PLLOUT_B buffer for single-output PLL variants Signed-off-by: David Shah --- ice40/pack.cc | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/ice40/pack.cc b/ice40/pack.cc index a86083b6..6b3ddefc 100644 --- a/ice40/pack.cc +++ b/ice40/pack.cc @@ -1063,7 +1063,12 @@ static void pack_special(Context *ctx) create_ice_cell(ctx, ctx->id("ICESTORM_PLL"), ci->name.str(ctx) + "_PLL"); packed->attrs[ctx->id("TYPE")] = ci->type.str(ctx); packed_cells.insert(ci->name); - + if (!is_sb_pll40_dual(ctx, ci)) { + // Remove second output, so a buffer isn't created for it, for these + // cell types with only one output + packed->ports.erase(ctx->id("PLLOUT_B")); + packed->ports.erase(ctx->id("PLLOUT_B_GLOBAL")); + } for (auto attr : ci->attrs) packed->attrs[attr.first] = attr.second; for (auto param : ci->params) -- cgit v1.2.3