diff --git a/hw/top_earlgrey/data/clocks.xdc b/hw/top_earlgrey/data/clocks.xdc
index 694c0a5..632b7a5 100644
--- a/hw/top_earlgrey/data/clocks.xdc
+++ b/hw/top_earlgrey/data/clocks.xdc
@@ -20,4 +20,9 @@
 set u_div4 top_earlgrey/u_clkmgr/u_io_div4_div
 create_generated_clock -name clk_io_div4 -source [get_pin ${u_pll}/CLKOUT0] -divide_by 4 [get_pin ${u_div4}/u_clk_div_buf/gen_xilinx.u_impl_xilinx/bufg_i/O]
 
-set_clock_groups -group ${clks_10_unbuf} -group ${clks_48_unbuf} -group clk_io_div2 -group clk_io_div4 -asynchronous
+## JTAG and SPI clocks
+create_clock -add -name jtag_tck    -period 100.00 -waveform {0 5} [get_nets jtag_tck_buf]
+create_clock -add -name clk_spi_in  -period 100.00 -waveform {0 5} [get_pin top_earlgrey/u_spi_device/u_clk_spi_in_buf/gen_xilinx.u_impl_xilinx/bufg_i/O]
+create_clock -add -name clk_spi_out -period 100.00 -waveform {0 5} [get_pin top_earlgrey/u_spi_device/u_clk_spi_out_buf/gen_xilinx.u_impl_xilinx/bufg_i/O]
+
+set_clock_groups -group ${clks_10_unbuf} -group ${clks_48_unbuf} -group clk_io_div2 -group clk_io_div4 -group jtag_tck -group clk_spi_in -group clk_spi_out -asynchronous