platforms: IO_PLACER_H/V can be overriden by designs

oharboe · oharboe · commit aa0528fe4bae · 2025-03-17T18:38:10.000+01:00
platforms are now consistent here. Changed all in case an
existing platform is used as a template for some future
platform.

Signed-off-by: Øyvind Harboe &lt;oyvind.harboe@zylin.com&gt;
diff --git a/flow/platforms/ihp-sg13g2/config.mk b/flow/platforms/ihp-sg13g2/config.mk
@@ -75,8 +75,8 @@ export MATCH_CELL_FOOTPRINT = 1
 export PLACE_SITE = CoreSite
 
 # IO Placer pin layers
-export IO_PLACER_H = Metal2
-export IO_PLACER_V = Metal3
+export IO_PLACER_H ?= Metal2
+export IO_PLACER_V ?= Metal3
 
 # Define default PDN config
 export PDN_TCL ?= $(PLATFORM_DIR)/pdn.tcl
diff --git a/flow/platforms/nangate45/config.mk b/flow/platforms/nangate45/config.mk
@@ -50,8 +50,8 @@ export ABC_LOAD_IN_FF = 3.898
 export PLACE_SITE = FreePDK45_38x28_10R_NP_162NW_34O
 
 # IO Placer pin layers
-export IO_PLACER_H = metal5
-export IO_PLACER_V = metal6
+export IO_PLACER_H ?= metal5
+export IO_PLACER_V ?= metal6
 
 # Define default PDN config
 export PDN_TCL ?= $(PLATFORM_DIR)/grid_strategy-M1-M4-M7.tcl
diff --git a/flow/platforms/sky130hd/config.mk b/flow/platforms/sky130hd/config.mk
@@ -93,8 +93,8 @@ export MATCH_CELL_FOOTPRINT = 1
 export PLACE_SITE = unithd
 
 # IO Placer pin layers
-export IO_PLACER_H = met3
-export IO_PLACER_V = met2
+export IO_PLACER_H ?= met3
+export IO_PLACER_V ?= met2
 
 # Define default PDN config
 export PDN_TCL ?= $(PLATFORM_DIR)/pdn.tcl
diff --git a/flow/platforms/sky130hs/config.mk b/flow/platforms/sky130hs/config.mk
@@ -55,8 +55,8 @@ export MATCH_CELL_FOOTPRINT = 1
 export PLACE_SITE = unit
 
 # IO Placer pin layers
-export IO_PLACER_H = met3
-export IO_PLACER_V = met2
+export IO_PLACER_H ?= met3
+export IO_PLACER_V ?= met2
 
 # Define default PDN config
 export PDN_TCL ?= $(PLATFORM_DIR)/pdn.tcl
