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diff --git a/liteeth/core/arp.py b/liteeth/core/arp.py
index c272718..d885af3 100644
--- a/liteeth/core/arp.py
+++ b/liteeth/core/arp.py
@@ -53,7 +53,7 @@ class LiteEthARPTX(Module):
         )
         self.comb += [
             packetizer.sink.last.eq(counter == (packet_words - 1)),
-            packetizer.sink.last_be.eq(1 if len(packetizer.sink.last_be) == 1 else 2**(packet_length%(dw//8)-1)),
+            packetizer.sink.last_be.eq(1 if len(packetizer.sink.last_be) == 1 else 2**((packet_length-1)%(dw//8))),
             packetizer.sink.hwtype.eq(arp_hwtype_ethernet),
             packetizer.sink.proto.eq(arp_proto_ip),
             packetizer.sink.hwsize.eq(6),
diff --git a/liteeth/frontend/etherbone.py b/liteeth/frontend/etherbone.py
index 5c3b548..efc761a 100644
--- a/liteeth/frontend/etherbone.py
+++ b/liteeth/frontend/etherbone.py
@@ -335,7 +335,7 @@ class LiteEthEtherboneRecord(Module):
             sink.connect(depacketizer.sink),
             depacketizer.source.connect(receiver.sink)
         ]
-        if endianness is "big":
+        if endianness == "big":
             self.comb += receiver.sink.data.eq(reverse_bytes(depacketizer.source.data))
 
         # Save last ip address
@@ -361,7 +361,7 @@ class LiteEthEtherboneRecord(Module):
                              (sender.source.rcount != 0)*4 + sender.source.rcount*4),
             source.ip_address.eq(last_ip_address)
         ]
-        if endianness is "big":
+        if endianness == "big":
             self.comb += packetizer.sink.data.eq(reverse_bytes(sender.source.data))
 
 # Etherbone Wishbone Master ------------------------------------------------------------------------
diff --git a/liteeth/phy/ecp5rgmii.py b/liteeth/phy/ecp5rgmii.py
index 2b529d2..aeda5da 100644
--- a/liteeth/phy/ecp5rgmii.py
+++ b/liteeth/phy/ecp5rgmii.py
@@ -62,7 +62,7 @@ class LiteEthPHYRGMIIRX(Module, AutoCSR):
                     ("``0b0``", "Link down."),
                     ("``0b1``", "Link up."),
                 ]),
-                CSRField("clock_speed", size=1, values=[
+                CSRField("clock_speed", size=2, values=[
                     ("``0b00``", "2.5MHz   (10Mbps)."),
                     ("``0b01``", "25MHz   (100MBps)."),
                     ("``0b10``", "125MHz (1000MBps)."),