flow: designs: ihp-sg13g2: i2c-gpio-expander: Use generic pad.tcl

Use the platform specific pad.tcl file and only provide all pins
for each bank.

Signed-off-by: Daniel Schultz <dnltz@aesc-silicon.de>

Author: dnltz

flow/designs/ihp-sg13g2/i2c-gpio-expander/I2cGpioExpanderTop.v

@@ -162,6 +162,14 @@ module I2cGpioExpanderTop (
     .p2c    (sg13g2_IOPad_io_gpio_7_p2c   ), //o
     .pad    (io_gpio_7_PAD                )  //~
   );
+  (* keep *) sg13g2_IOPadVdd sg13g2_IOPadVdd_inst (
+  );
+  (* keep *) sg13g2_IOPadVss sg13g2_IOPadVss_inst (
+  );
+  (* keep *) sg13g2_IOPadIOVss sg13g2_IOPadIOVss_inst (
+  );
+  (* keep *) sg13g2_IOPadIOVdd sg13g2_IOPadIOVdd_inst (
+  );
   assign clock = sg13g2_IOPad_io_clock_p2c;
   assign reset = sg13g2_IOPad_io_reset_p2c;
   always @(*) begin

flow/designs/ihp-sg13g2/i2c-gpio-expander/config.mk

@@ -18,7 +18,28 @@ export PLACE_DENSITY = 0.75
 export MACRO_PLACE_HALO = 20 20
 export CORNERS = slow fast
 
-export FOOTPRINT_TCL = $(DESIGN_HOME)/$(PLATFORM)/$(DESIGN_NICKNAME)/pad.tcl
+export IO_NORTH_PINS = sg13g2_IOPad_io_gpio_3 \
+sg13g2_IOPad_io_gpio_4 \
+sg13g2_IOPad_io_gpio_5 \
+sg13g2_IOPad_io_gpio_6 \
+sg13g2_IOPad_io_gpio_7
+export IO_EAST_PINS = sg13g2_IOPadVdd_inst \
+sg13g2_IOPadVss_inst \
+sg13g2_IOPad_io_address_0 \
+sg13g2_IOPad_io_address_1 \
+sg13g2_IOPad_io_address_2
+export IO_SOUTH_PINS = sg13g2_IOPad_io_clock \
+sg13g2_IOPad_io_reset \
+sg13g2_IOPad_io_i2c_scl \
+sg13g2_IOPad_io_i2c_sda \
+sg13g2_IOPad_io_i2c_interrupt
+export IO_WEST_PINS = sg13g2_IOPad_io_gpio_0 \
+sg13g2_IOPad_io_gpio_1 \
+sg13g2_IOPad_io_gpio_2 \
+sg13g2_IOPadIOVss_inst \
+sg13g2_IOPadIOVdd_inst
+export FOOTPRINT_TCL = $(PLATFORM_DIR)/pad.tcl
+
 export PDN_TCL = $(DESIGN_HOME)/$(PLATFORM)/$(DESIGN_NICKNAME)/pdn.tcl
 
 export BLOCKS = I2cDeviceCtrl