diff --git a/arch/arm/src/tiva/tiva_enablepwr.h b/arch/arm/src/tiva/tiva_enablepwr.h
index 55890211bc..0a5c64744f 100644
--- a/arch/arm/src/tiva/tiva_enablepwr.h
+++ b/arch/arm/src/tiva/tiva_enablepwr.h
@@ -151,8 +151,8 @@
 /* μDMA Power Control */
 
 #ifdef TIVA_SYSCON_PCDMA
-#  define tiva_udma_enablepwr()    tiva_enablepwr(TIVA_SYSCON_PCDMA,SYSCON_PCDMA_R0)
-#  define tiva_udma_disablepwr()   tiva_disablepwr(TIVA_SYSCON_PCDMA,SYSCON_PCDMA_R0)
+#  define tiva_udma_enablepwr()    tiva_enablepwr(TIVA_SYSCON_PCDMA,SYSCON_PCDMA_P0)
+#  define tiva_udma_disablepwr()   tiva_disablepwr(TIVA_SYSCON_PCDMA,SYSCON_PCDMA_P0)
 #else
 #  define tiva_udma_enablepwr()
 #  define tiva_udma_disablepwr()
@@ -161,8 +161,8 @@
 /* EPI Power Control */
 
 #ifdef TIVA_SYSCON_PCEPI
-#  define tiva_epi_enablepwr()     tiva_enablepwr(TIVA_SYSCON_PCEPI,SYSCON_PCEPI_R0)
-#  define tiva_epi_disablepwr()    tiva_disablepwr(TIVA_SYSCON_PCEPI,SYSCON_PCEPI_R0)
+#  define tiva_epi_enablepwr()     tiva_enablepwr(TIVA_SYSCON_PCEPI,SYSCON_PCEPI_P0)
+#  define tiva_epi_disablepwr()    tiva_disablepwr(TIVA_SYSCON_PCEPI,SYSCON_PCEPI_P0)
 #else
 #  define tiva_epi_enablepwr()
 #  define tiva_epi_disablepwr()
@@ -171,8 +171,8 @@
 /* Hibernation Power Control */
 
 #ifdef TIVA_SYSCON_PCHIB
-#  define tiva_hib_enablepwr()     tiva_enablepwr(TIVA_SYSCON_PCHIB,SYSCON_PCHIB_R0)
-#  define tiva_hib_disablepwr()    tiva_disablepwr(TIVA_SYSCON_PCHIB,SYSCON_PCHIB_R0)
+#  define tiva_hib_enablepwr()     tiva_enablepwr(TIVA_SYSCON_PCHIB,SYSCON_PCHIB_P0)
+#  define tiva_hib_disablepwr()    tiva_disablepwr(TIVA_SYSCON_PCHIB,SYSCON_PCHIB_P0)
 #else
 #  define tiva_hib_enablepwr()
 #  define tiva_hib_disablepwr()
@@ -261,8 +261,8 @@
 /* USB Power Control */
 
 #ifdef TIVA_SYSCON_PCUSB
-#  define tiva_usb_enablepwr()     tiva_enablepwr(TIVA_SYSCON_PCUSB,SYSCON_PCUSB_R0)
-#  define tiva_usb_disablepwr()    tiva_disablepwr(TIVA_SYSCON_PCUSB,SYSCON_PCUSB_R0)
+#  define tiva_usb_enablepwr()     tiva_enablepwr(TIVA_SYSCON_PCUSB,SYSCON_PCUSB_P0)
+#  define tiva_usb_disablepwr()    tiva_disablepwr(TIVA_SYSCON_PCUSB,SYSCON_PCUSB_P0)
 #else
 #  define tiva_usb_enablepwr()
 #  define tiva_usb_disablepwr()
@@ -271,8 +271,8 @@
 /* Ethernet PHY Power Control */
 
 #ifdef TIVA_SYSCON_PCEPHY
-#  define tiva_ephy_enablepwr()    tiva_enablepwr(TIVA_SYSCON_PCEPHY,SYSCON_PCEPHY_R0)
-#  define tiva_ephy_disablepwr()   tiva_disablepwr(TIVA_SYSCON_PCEPHY,SYSCON_PCEPHY_R0)
+#  define tiva_ephy_enablepwr()    tiva_enablepwr(TIVA_SYSCON_PCEPHY,SYSCON_PCEPHY_P0)
+#  define tiva_ephy_disablepwr()   tiva_disablepwr(TIVA_SYSCON_PCEPHY,SYSCON_PCEPHY_P0)
 #else
 #  define tiva_ephy_enablepwr()
 #  define tiva_ephy_disablepwr()
@@ -313,8 +313,8 @@
 /* ACMP Power Control */
 
 #ifdef TIVA_SYSCON_PCACMP
-#  define tiva_acmp_enablepwr()    tiva_enablepwr(TIVA_SYSCON_PCACMP,SYSCON_PCACMP_R0)
-#  define tiva_acmp_disablepwr()   tiva_disablepwr(TIVA_SYSCON_PCACMP,SYSCON_PCACMP_R0)
+#  define tiva_acmp_enablepwr()    tiva_enablepwr(TIVA_SYSCON_PCACMP,SYSCON_PCACMP_P0)
+#  define tiva_acmp_disablepwr()   tiva_disablepwr(TIVA_SYSCON_PCACMP,SYSCON_PCACMP_P0)
 #else
 #  define tiva_acmp_enablepwr()
 #  define tiva_acmp_disablepwr()
@@ -355,8 +355,8 @@
 /* EEPROM Power Control */
 
 #ifdef TIVA_SYSCON_PCEEPROM
-#  define tiva_eeprom_enablepwr()   tiva_enablepwr(TIVA_SYSCON_PCEEPROM,SYSCON_PCEEPROM_R0)
-#  define tiva_eeprom_disablepwr()  tiva_disablepwr(TIVA_SYSCON_PCEEPROM,SYSCON_PCEEPROM_R0)
+#  define tiva_eeprom_enablepwr()   tiva_enablepwr(TIVA_SYSCON_PCEEPROM,SYSCON_PCEEPROM_P0)
+#  define tiva_eeprom_disablepwr()  tiva_disablepwr(TIVA_SYSCON_PCEEPROM,SYSCON_PCEEPROM_P0)
 #else
 #  define tiva_eeprom_enablepwr()
 #  define tiva_eeprom_disablepwr()
@@ -389,8 +389,8 @@
 /* CRC/Crypto Modules RunMode ClockGating Control */
 
 #ifdef TIVA_SYSCON_PCCCM
-#  define tiva_ccm_enablepwr()     tiva_enablepwr(TIVA_SYSCON_PCCCM,SYSCON_PCCCM_R0)
-#  define tiva_ccm_disablepwr()    tiva_disablepwr(TIVA_SYSCON_PCCCM,SYSCON_PCCCM_R0)
+#  define tiva_ccm_enablepwr()     tiva_enablepwr(TIVA_SYSCON_PCCCM,SYSCON_PCCCM_P0)
+#  define tiva_ccm_disablepwr()    tiva_disablepwr(TIVA_SYSCON_PCCCM,SYSCON_PCCCM_P0)
 #else
 #  define tiva_ccm_enablepwr()
 #  define tiva_ccm_disablepwr()
@@ -399,8 +399,8 @@
 /* LCD Controller Power Control */
 
 #ifdef TIVA_SYSCON_PCLCD
-#  define tiva_lcd_enablepwr()     tiva_enablepwr(TIVA_SYSCON_PCLCD,SYSCON_PCLCD_R0)
-#  define tiva_lcd_disablepwr()    tiva_disablepwr(TIVA_SYSCON_PCLCD,SYSCON_PCLCD_R0)
+#  define tiva_lcd_enablepwr()     tiva_enablepwr(TIVA_SYSCON_PCLCD,SYSCON_PCLCD_P0)
+#  define tiva_lcd_disablepwr()    tiva_disablepwr(TIVA_SYSCON_PCLCD,SYSCON_PCLCD_P0)
 #else
 #  define tiva_lcd_enablepwr()
 #  define tiva_lcd_disablepwr()
@@ -409,8 +409,8 @@
 /* 1-Wire Power Control */
 
 #ifdef TIVA_SYSCON_PCOWIRE
-#  define tiva_owire_enablepwr()   tiva_enablepwr(TIVA_SYSCON_PCOWIRE,SYSCON_PCOWIRE_R0)
-#  define tiva_owire_disablepwr()  tiva_disablepwr(TIVA_SYSCON_PCOWIRE,SYSCON_PCOWIRE_R0)
+#  define tiva_owire_enablepwr()   tiva_enablepwr(TIVA_SYSCON_PCOWIRE,SYSCON_PCOWIRE_P0)
+#  define tiva_owire_disablepwr()  tiva_disablepwr(TIVA_SYSCON_PCOWIRE,SYSCON_PCOWIRE_P0)
 #else
 #  define tiva_owire_enablepwr()
 #  define tiva_owire_disablepwr()
@@ -419,8 +419,8 @@
 /* Ethernet MAC Power Control */
 
 #ifdef TIVA_SYSCON_PCEMAC
-#  define tiva_emac_enablepwr()    tiva_enablepwr(TIVA_SYSCON_PCEMAC,SYSCON_PCEMAC_R0)
-#  define tiva_emac_disablepwr()   tiva_disablepwr(TIVA_SYSCON_PCEMAC,SYSCON_PCEMAC_R0)
+#  define tiva_emac_enablepwr()    tiva_enablepwr(TIVA_SYSCON_PCEMAC,SYSCON_PCEMAC_P0)
+#  define tiva_emac_disablepwr()   tiva_disablepwr(TIVA_SYSCON_PCEMAC,SYSCON_PCEMAC_P0)
 #else
 #  define tiva_emac_enablepwr()
 #  define tiva_emac_disablepwr()
diff --git a/arch/arm/src/tiva/tm4c_ethernet.c b/arch/arm/src/tiva/tm4c_ethernet.c
index 674595fc91..9c39006556 100644
--- a/arch/arm/src/tiva/tm4c_ethernet.c
+++ b/arch/arm/src/tiva/tm4c_ethernet.c
@@ -3369,6 +3369,20 @@ int tiva_ethinitialize(int intf)
   priv->txpoll       = wd_create();   /* Create periodic poll timer */
   priv->txtimeout    = wd_create();   /* Create TX timeout timer */
 
+  /* Enable power and clocking to the Ethernet MAC
+   *
+   * - Enable Power:  Applies power (only) to the UART peripheral.  This is not
+   *   an essential step since enabling clocking will also apply power.  The
+   *   only significance is that the EMAC state will be retained if the EMAC
+   *   clocking is subsequently disabled.
+   * - Enable Clocking:  Applies both power and clocking to the EMAC peripheral,
+   *   bringing it a fully functional state.
+   */
+
+  tiva_emac_enablepwr();   /* Ethernet MAC Power Control */
+  tiva_emac_enableclk();   /* Ethernet MAC Run Mode Clock Gating Control */
+
+#ifdef CONFIG_TIVA_PHY_INTERNAL
   /* Integrated PHY:
    *
    *   "The Ethernet Controller Module and Integrated PHY receive two clock inputs:
@@ -3386,9 +3400,15 @@ int tiva_ethinitialize(int intf)
    *   External PHY support is not yet implemented.
    */
 
+  /* Enable power and clocking to the Integrated PHY */
+
+  tiva_ephy_enablepwr();   /* Ethernet PHY Power Control */
+  tiva_ephy_enableclk();   /* Ethernet PHY Run Mode Clock Gating Control */
+#else
   /* Configure GPIO pins to support Ethernet */
 
   tiva_ethgpioconfig(priv);
+#endif
 
   /* Attach the IRQ to the driver */