diff --git a/arch/z80/Kconfig b/arch/z80/Kconfig
index b8b20c6f9bb..f1a9b5ce629 100644
--- a/arch/z80/Kconfig
+++ b/arch/z80/Kconfig
@@ -497,21 +497,18 @@ config ARCH_CHIP_Z8F6423
 config ARCH_CHIP_EZ80F91
 	bool "EZ80F91"
 	select ARCH_CHIP_EZ80
-	select HAVE_LOWSERIALINIT
 	---help---
 		ZiLOG EZ80F91 (ez80 Acclaim)
 
 config ARCH_CHIP_EZ80F92
 	bool "EZ80F92"
 	select ARCH_CHIP_EZ80
-	select HAVE_LOWSERIALINIT
 	---help---
 		ZiLOG EZ80F92 (ez80 Acclaim)
 
 config ARCH_CHIP_EZ80F93
 	bool "EZ80F93"
 	select ARCH_CHIP_EZ80
-	select HAVE_LOWSERIALINIT
 	---help---
 		ZiLOG EZ80F93 (ez80 Acclaim)
 
@@ -552,6 +549,8 @@ config ARCH_CHIP_Z8
 
 config ARCH_CHIP_EZ80
 	bool
+	select HAVE_LOWSERIALINIT
+	select ARCH_HAVE_PHY
 
 config HAVE_LOWSERIALINIT
 	bool
diff --git a/arch/z80/src/ez80/Kconfig b/arch/z80/src/ez80/Kconfig
index 76cdd5f9f4e..d67818a1471 100644
--- a/arch/z80/src/ez80/Kconfig
+++ b/arch/z80/src/ez80/Kconfig
@@ -50,7 +50,7 @@ hex "PHY Address"
 		Provides the MII address of the PHY device
 
 # Belongs in net/Kconfig as PHY_AM79C874
-# EZ80_PHYAM79C874 - Define for Am79c874 PHY
+# ETH0_PHY_AM79C874 - Define for Am79c874 PHY
 
 config EZ80_PHYCONFIG
 	int "PHY Configuration"
diff --git a/arch/z80/src/ez80/ez80_emac.c b/arch/z80/src/ez80/ez80_emac.c
index 23542e2798b..72700367768 100644
--- a/arch/z80/src/ez80/ez80_emac.c
+++ b/arch/z80/src/ez80/ez80_emac.c
@@ -150,7 +150,7 @@
  */
 
 #ifndef CONFIG_EZ80_MDCDIV
-#  ifdef CONFIG_EZ80_PHYAM79C874
+#  ifdef CONFIG_ETH0_PHY_AM79C874
 #    define CONFIG_EZ80_MDCDIV EMAC_MDC_DIV20
 #  else
 #    define CONFIG_EZ80_MDCDIV EMAC_MDC_DIV4
@@ -556,7 +556,7 @@ static bool ez80emac_miipoll(FAR struct ez80emac_driver_s *priv, uint32_t offset
  *
  ****************************************************************************/
 
-#ifdef CONFIG_EZ80_PHYAM79C874
+#ifdef CONFIG_ETH0_PHY_AM79C874
 static int ez80emac_miiconfigure(FAR struct ez80emac_driver_s *priv)
 {
   uint16_t phyval;