integration/soc: add clock_domain parameter to add_etherbone.

To allow using a sys_clk < 125MHz with a 1Gbps link.

diff --git a/litex/soc/integration/soc.py b/litex/soc/integration/soc.py
index d45b32fddaa769b5b547ede6959864cfe3d7b05e..012c486d7278554b3e66cfb1c647b0e2443ba89c 100644 (file)
--- a/litex/soc/integration/soc.py
+++ b/litex/soc/integration/soc.py
@@ -1138,7 +1138,7 @@ class LiteXSoC(SoC):
             eth_tx_clk)
 
     # Add Etherbone --------------------------------------------------------------------------------
-    def add_etherbone(self, name="etherbone", phy=None,
+    def add_etherbone(self, name="etherbone", phy=None, clock_domain=None,
         mac_address = 0x10e2d5000000,
         ip_address  = "192.168.1.50",
         udp_port    = 1234):
@@ -1151,9 +1151,21 @@ class LiteXSoC(SoC):
             mac_address = mac_address,
             ip_address  = ip_address,
             clk_freq    = self.clk_freq)
+        if clock_domain is not None: # FIXME: Could probably be avoided.
+            ethcore = ClockDomainsRenamer("eth_tx")(ethcore)
         self.submodules += ethcore
+
+        # Clock domain renaming
+        if clock_domain is not None: # FIXME: Could probably be avoided.
+            self.clock_domains.cd_etherbone = ClockDomain("etherbone")
+            self.comb += self.cd_etherbone.clk.eq(ClockSignal(clock_domain))
+            self.comb += self.cd_etherbone.rst.eq(ResetSignal(clock_domain))
+            clock_domain = "etherbone"
+        else:
+            clock_domain = "sys"
+
         # Etherbone
-        etherbone = LiteEthEtherbone(ethcore.udp, udp_port)
+        etherbone = LiteEthEtherbone(ethcore.udp, udp_port, cd=clock_domain)
         setattr(self.submodules, name, etherbone)
         self.add_wb_master(etherbone.wishbone.bus)
         # Timing constraints