diff --git a/configs/README.txt b/configs/README.txt
index 7ad2825d0cb..6cd5eef3f94 100644
--- a/configs/README.txt
+++ b/configs/README.txt
@@ -990,7 +990,10 @@ defconfig -- This is a configuration file similar to the Linux
     CONFIG_NET_MAX_LISTENPORTS - Maximum number of listening TCP ports (all tasks)
     CONFIG_NET_TCP_READAHEAD_BUFSIZE - Size of TCP read-ahead buffers
     CONFIG_NET_NTCP_READAHEAD_BUFFERS - Number of TCP read-ahead buffers
-      (may be zero)
+      (may be zero to disable TCP/IP read-ahead buffering)
+    CONFIG_NET_TCP_RECVDELAY - Delay (in deciseconds) after a TCP/IP packet
+      is received.  This delay may allow catching of additional packets
+      when TCP/IP read-ahead is disabled.  Default: 0
     CONFIG_NET_TCPBACKLOG - Incoming connections pend in a backlog until
       accept() is called. The size of the backlog is selected when listen()
       is called.
diff --git a/configs/olimex-stm32-p107/nsh/defconfig b/configs/olimex-stm32-p107/nsh/defconfig
index 18858d5df24..c7c71018aa8 100644
--- a/configs/olimex-stm32-p107/nsh/defconfig
+++ b/configs/olimex-stm32-p107/nsh/defconfig
@@ -365,7 +365,7 @@ CONFIG_NET_MULTICAST=n
 #
 # STM32F107vc Ethernet device driver settings
 #
-CONFIG_STM32_PHYADDR=0x01
+CONFIG_STM32_PHYADDR=1
 CONFIG_STM32_MII=n
 CONFIG_STM32_RMII=y
 CONFIG_STM32_RMII_MCO=y
diff --git a/configs/stm3220g-eval/dhcpd/defconfig b/configs/stm3220g-eval/dhcpd/defconfig
index 848121e04cf..433fe97d27f 100644
--- a/configs/stm3220g-eval/dhcpd/defconfig
+++ b/configs/stm3220g-eval/dhcpd/defconfig
@@ -197,7 +197,7 @@ CONFIG_CAN2_BAUD=700000
 #
 # STM32F20xxx Ethernet device driver settings
 #
-CONFIG_STM32_PHYADDR=0x01
+CONFIG_STM32_PHYADDR=1
 CONFIG_STM32_MII=y
 CONFIG_STM32_MII_MCO1=y
 CONFIG_STM32_MII_MCO2=n
diff --git a/configs/stm3220g-eval/nettest/defconfig b/configs/stm3220g-eval/nettest/defconfig
index 7e660ad027c..ef5c2da9649 100644
--- a/configs/stm3220g-eval/nettest/defconfig
+++ b/configs/stm3220g-eval/nettest/defconfig
@@ -197,7 +197,7 @@ CONFIG_CAN2_BAUD=700000
 #
 # STM32F20xxx Ethernet device driver settings
 #
-CONFIG_STM32_PHYADDR=0x01
+CONFIG_STM32_PHYADDR=1
 CONFIG_STM32_MII=y
 CONFIG_STM32_MII_MCO1=y
 CONFIG_STM32_MII_MCO2=n
diff --git a/configs/stm3220g-eval/nsh/defconfig b/configs/stm3220g-eval/nsh/defconfig
index 48912bd8b94..591f246163a 100644
--- a/configs/stm3220g-eval/nsh/defconfig
+++ b/configs/stm3220g-eval/nsh/defconfig
@@ -197,7 +197,7 @@ CONFIG_CAN2_BAUD=700000
 #
 # STM32F20xxx Ethernet device driver settings
 #
-CONFIG_STM32_PHYADDR=0x01
+CONFIG_STM32_PHYADDR=1
 CONFIG_STM32_MII=y
 CONFIG_STM32_MII_MCO1=y
 CONFIG_STM32_MII_MCO2=n
diff --git a/configs/stm3220g-eval/nsh2/defconfig b/configs/stm3220g-eval/nsh2/defconfig
index c2ede9c67f4..03ee777f4f8 100644
--- a/configs/stm3220g-eval/nsh2/defconfig
+++ b/configs/stm3220g-eval/nsh2/defconfig
@@ -197,7 +197,7 @@ CONFIG_CAN2_BAUD=700000
 #
 # STM32F20xxx Ethernet device driver settings
 #
-CONFIG_STM32_PHYADDR=0x01
+CONFIG_STM32_PHYADDR=1
 CONFIG_STM32_MII=y
 CONFIG_STM32_MII_MCO1=y
 CONFIG_STM32_MII_MCO2=n
diff --git a/configs/stm3220g-eval/nxwm/defconfig b/configs/stm3220g-eval/nxwm/defconfig
index 6e69333255b..bd59f47de9a 100644
--- a/configs/stm3220g-eval/nxwm/defconfig
+++ b/configs/stm3220g-eval/nxwm/defconfig
@@ -197,7 +197,7 @@ CONFIG_CAN2_BAUD=700000
 #
 # STM32F20xxx Ethernet device driver settings
 #
-CONFIG_STM32_PHYADDR=0x01
+CONFIG_STM32_PHYADDR=1
 CONFIG_STM32_MII=y
 CONFIG_STM32_MII_MCO1=y
 CONFIG_STM32_MII_MCO2=n
diff --git a/configs/stm3220g-eval/ostest/defconfig b/configs/stm3220g-eval/ostest/defconfig
index d0ace11bce7..30ec69419dc 100644
--- a/configs/stm3220g-eval/ostest/defconfig
+++ b/configs/stm3220g-eval/ostest/defconfig
@@ -197,7 +197,7 @@ CONFIG_CAN2_BAUD=700000
 #
 # STM32F20xxx Ethernet device driver settings
 #
-CONFIG_STM32_PHYADDR=0x01
+CONFIG_STM32_PHYADDR=1
 CONFIG_STM32_MII=y
 CONFIG_STM32_MII_MCO1=y
 CONFIG_STM32_MII_MCO2=n
diff --git a/configs/stm3220g-eval/telnetd/defconfig b/configs/stm3220g-eval/telnetd/defconfig
index 2ff215afcfa..550f654ba01 100644
--- a/configs/stm3220g-eval/telnetd/defconfig
+++ b/configs/stm3220g-eval/telnetd/defconfig
@@ -197,7 +197,7 @@ CONFIG_CAN2_BAUD=700000
 #
 # STM32F20xxx Ethernet device driver settings
 #
-CONFIG_STM32_PHYADDR=0x01
+CONFIG_STM32_PHYADDR=1
 CONFIG_STM32_MII=y
 CONFIG_STM32_MII_MCO1=y
 CONFIG_STM32_MII_MCO2=n
diff --git a/configs/stm3240g-eval/dhcpd/defconfig b/configs/stm3240g-eval/dhcpd/defconfig
index 382ce61553d..4e22244bb51 100644
--- a/configs/stm3240g-eval/dhcpd/defconfig
+++ b/configs/stm3240g-eval/dhcpd/defconfig
@@ -203,7 +203,7 @@ CONFIG_CAN2_BAUD=700000
 #
 # STM32F40xxx Ethernet device driver settings
 #
-CONFIG_STM32_PHYADDR=0x01
+CONFIG_STM32_PHYADDR=1
 CONFIG_STM32_MII=y
 CONFIG_STM32_MII_MCO1=y
 CONFIG_STM32_MII_MCO2=n
diff --git a/configs/stm3240g-eval/nettest/defconfig b/configs/stm3240g-eval/nettest/defconfig
index 9eb8f3d5ce3..e21c1070bd2 100644
--- a/configs/stm3240g-eval/nettest/defconfig
+++ b/configs/stm3240g-eval/nettest/defconfig
@@ -203,7 +203,7 @@ CONFIG_CAN2_BAUD=700000
 #
 # STM32F40xxx Ethernet device driver settings
 #
-CONFIG_STM32_PHYADDR=0x01
+CONFIG_STM32_PHYADDR=1
 CONFIG_STM32_MII=y
 CONFIG_STM32_MII_MCO1=y
 CONFIG_STM32_MII_MCO2=n
diff --git a/configs/stm3240g-eval/nsh/defconfig b/configs/stm3240g-eval/nsh/defconfig
index 8b2617ec053..34f84db0743 100644
--- a/configs/stm3240g-eval/nsh/defconfig
+++ b/configs/stm3240g-eval/nsh/defconfig
@@ -203,7 +203,7 @@ CONFIG_CAN2_BAUD=700000
 #
 # STM32F40xxx Ethernet device driver settings
 #
-CONFIG_STM32_PHYADDR=0x01
+CONFIG_STM32_PHYADDR=1
 CONFIG_STM32_MII=y
 CONFIG_STM32_MII_MCO1=y
 CONFIG_STM32_MII_MCO2=n
diff --git a/configs/stm3240g-eval/nsh2/defconfig b/configs/stm3240g-eval/nsh2/defconfig
index 00d9dac0a2f..dfb837e8a59 100644
--- a/configs/stm3240g-eval/nsh2/defconfig
+++ b/configs/stm3240g-eval/nsh2/defconfig
@@ -204,7 +204,7 @@ CONFIG_CAN2_BAUD=700000
 #
 # STM32F40xxx Ethernet device driver settings
 #
-CONFIG_STM32_PHYADDR=0x01
+CONFIG_STM32_PHYADDR=1
 CONFIG_STM32_MII=y
 CONFIG_STM32_MII_MCO1=y
 CONFIG_STM32_MII_MCO2=n
diff --git a/configs/stm3240g-eval/nxconsole/defconfig b/configs/stm3240g-eval/nxconsole/defconfig
index 172d17b6fff..417201f3ea7 100644
--- a/configs/stm3240g-eval/nxconsole/defconfig
+++ b/configs/stm3240g-eval/nxconsole/defconfig
@@ -203,7 +203,7 @@ CONFIG_CAN2_BAUD=700000
 #
 # STM32F40xxx Ethernet device driver settings
 #
-CONFIG_STM32_PHYADDR=0x01
+CONFIG_STM32_PHYADDR=1
 CONFIG_STM32_MII=y
 CONFIG_STM32_MII_MCO1=y
 CONFIG_STM32_MII_MCO2=n
diff --git a/configs/stm3240g-eval/nxwm/defconfig b/configs/stm3240g-eval/nxwm/defconfig
index 07bc408dcc7..88d3ecb8d31 100644
--- a/configs/stm3240g-eval/nxwm/defconfig
+++ b/configs/stm3240g-eval/nxwm/defconfig
@@ -203,7 +203,7 @@ CONFIG_CAN2_BAUD=700000
 #
 # STM32F40xxx Ethernet device driver settings
 #
-CONFIG_STM32_PHYADDR=0x01
+CONFIG_STM32_PHYADDR=1
 CONFIG_STM32_MII=y
 CONFIG_STM32_MII_MCO1=y
 CONFIG_STM32_MII_MCO2=n
diff --git a/configs/stm3240g-eval/ostest/defconfig b/configs/stm3240g-eval/ostest/defconfig
index 1f23047306e..2b95735bb4b 100644
--- a/configs/stm3240g-eval/ostest/defconfig
+++ b/configs/stm3240g-eval/ostest/defconfig
@@ -203,7 +203,7 @@ CONFIG_CAN2_BAUD=700000
 #
 # STM32F40xxx Ethernet device driver settings
 #
-CONFIG_STM32_PHYADDR=0x01
+CONFIG_STM32_PHYADDR=1
 CONFIG_STM32_MII=y
 CONFIG_STM32_MII_MCO1=y
 CONFIG_STM32_MII_MCO2=n
diff --git a/configs/stm3240g-eval/telnetd/defconfig b/configs/stm3240g-eval/telnetd/defconfig
index 44a0f27baa5..9dc5bfc28fd 100644
--- a/configs/stm3240g-eval/telnetd/defconfig
+++ b/configs/stm3240g-eval/telnetd/defconfig
@@ -203,7 +203,7 @@ CONFIG_CAN2_BAUD=700000
 #
 # STM32F40xxx Ethernet device driver settings
 #
-CONFIG_STM32_PHYADDR=0x01
+CONFIG_STM32_PHYADDR=1
 CONFIG_STM32_MII=y
 CONFIG_STM32_MII_MCO1=y
 CONFIG_STM32_MII_MCO2=n
diff --git a/configs/stm3240g-eval/webserver/defconfig b/configs/stm3240g-eval/webserver/defconfig
index 7bd8e52ceb5..8f3ea36dc74 100644
--- a/configs/stm3240g-eval/webserver/defconfig
+++ b/configs/stm3240g-eval/webserver/defconfig
@@ -203,7 +203,7 @@ CONFIG_CAN2_BAUD=700000
 #
 # STM32F40xxx Ethernet device driver settings
 #
-CONFIG_STM32_PHYADDR=0x01
+CONFIG_STM32_PHYADDR=1
 CONFIG_STM32_MII=y
 CONFIG_STM32_MII_MCO1=y
 CONFIG_STM32_MII_MCO2=n
diff --git a/configs/stm32f4discovery/nsh/defconfig b/configs/stm32f4discovery/nsh/defconfig
index 0a07e848954..12848ddee82 100644
--- a/configs/stm32f4discovery/nsh/defconfig
+++ b/configs/stm32f4discovery/nsh/defconfig
@@ -197,7 +197,7 @@ CONFIG_CAN2_BAUD=700000
 #
 # STM32F40xxx Ethernet device driver settings
 #
-CONFIG_STM32_PHYADDR=0x01
+CONFIG_STM32_PHYADDR=1
 CONFIG_STM32_MII=y
 CONFIG_STM32_MII_MCO1=y
 CONFIG_STM32_MII_MCO2=n
diff --git a/configs/stm32f4discovery/nxlines/defconfig b/configs/stm32f4discovery/nxlines/defconfig
index 52705977ab9..f99af0233d2 100644
--- a/configs/stm32f4discovery/nxlines/defconfig
+++ b/configs/stm32f4discovery/nxlines/defconfig
@@ -197,7 +197,7 @@ CONFIG_CAN2_BAUD=700000
 #
 # STM32F40xxx Ethernet device driver settings
 #
-CONFIG_STM32_PHYADDR=0x01
+CONFIG_STM32_PHYADDR=1
 CONFIG_STM32_MII=y
 CONFIG_STM32_MII_MCO1=y
 CONFIG_STM32_MII_MCO2=n
diff --git a/configs/stm32f4discovery/ostest/defconfig b/configs/stm32f4discovery/ostest/defconfig
index 5c120c61445..8657d7edfda 100644
--- a/configs/stm32f4discovery/ostest/defconfig
+++ b/configs/stm32f4discovery/ostest/defconfig
@@ -192,7 +192,7 @@ CONFIG_CAN2_BAUD=700000
 #
 # STM32F40xxx Ethernet device driver settings
 #
-CONFIG_STM32_PHYADDR=0x01
+CONFIG_STM32_PHYADDR=1
 CONFIG_STM32_MII=y
 CONFIG_STM32_MII_MCO1=y
 CONFIG_STM32_MII_MCO2=n
diff --git a/configs/stm32f4discovery/pm/defconfig b/configs/stm32f4discovery/pm/defconfig
index 592ce5701c7..4608c16c680 100644
--- a/configs/stm32f4discovery/pm/defconfig
+++ b/configs/stm32f4discovery/pm/defconfig
@@ -198,7 +198,7 @@ CONFIG_CAN2_BAUD=700000
 #
 # STM32F40xxx Ethernet device driver settings
 #
-CONFIG_STM32_PHYADDR=0x01
+CONFIG_STM32_PHYADDR=1
 CONFIG_STM32_MII=y
 CONFIG_STM32_MII_MCO1=y
 CONFIG_STM32_MII_MCO2=n