diff --git a/arch/arm/src/lpc31xx/Kconfig b/arch/arm/src/lpc31xx/Kconfig
index e89430ec9b0..addeaf16e42 100644
--- a/arch/arm/src/lpc31xx/Kconfig
+++ b/arch/arm/src/lpc31xx/Kconfig
@@ -243,11 +243,11 @@ config LPC31_USBDEV_DMA
 
 config LPC31_USBDEV_REGDEBUG
 	bool "Register level debug"
-	depends on DEBUG_FEATURES
+	depends on DEBUG_USB_INFO
 	default n
 	---help---
 		Output detailed register-level USB device debug information.  Requires
-		also CONFIG_DEBUG_FEATURES.
+		also CONFIG_DEBUG_USB_INFO.
 
 endmenu # USB device driver controller (DCD) options
 endif # LPC31_USBOTG && USBDEV
@@ -301,7 +301,7 @@ config LPC31_EHCI_PREALLOCATE
 config LPC31_EHCI_REGDEBUG
 	bool "Enable low-level EHCI register debug"
 	default n
-	depends on DEBUG_FEATURES
+	depends on DEBUG_USB_INFO
 
 endmenu # USB host controller driver (HCD) options
 endif # LPC31_USBOTG && USBHOST
@@ -310,9 +310,9 @@ menu "SPI device driver options"
 
 config LPC31_SPI_REGDEBUG
 	bool "SPI Register level debug"
-	depends on LPC31_SPI && DEBUG_FEATURES
+	depends on LPC31_SPI && DEBUG_SPI_INFO
 	default n
 	---help---
-		Output detailed register-level SPI device debug information.  Requires also CONFIG_DEBUG_FEATURES.
+		Output detailed register-level SPI device debug information.  Requires also CONFIG_DEBUG_SPI_INFO.
 
 endmenu # SPI device driver options
diff --git a/arch/arm/src/lpc31xx/lpc31_ehci.c b/arch/arm/src/lpc31xx/lpc31_ehci.c
index 1532feddbdf..cc9ffb4c13a 100644
--- a/arch/arm/src/lpc31xx/lpc31_ehci.c
+++ b/arch/arm/src/lpc31xx/lpc31_ehci.c
@@ -113,7 +113,7 @@
 
 /* Debug options */
 
-#ifndef CONFIG_DEBUG_FEATURES
+#ifndef CONFIG_DEBUG_USB_INFO
 #  undef CONFIG_LPC31_EHCI_REGDEBUG
 #endif
 
@@ -826,7 +826,7 @@ static uint32_t lpc31_swap32(uint32_t value)
 static void lpc31_printreg(volatile uint32_t *regaddr, uint32_t regval,
                           bool iswrite)
 {
-  _llerr("%08x%s%08x\n", (uintptr_t)regaddr, iswrite ? "<-" : "->", regval);
+  ullinfo("%08x%s%08x\n", (uintptr_t)regaddr, iswrite ? "<-" : "->", regval);
 }
 #endif
 
@@ -877,7 +877,7 @@ static void lpc31_checkreg(volatile uint32_t *regaddr, uint32_t regval, bool isw
             {
               /* No.. More than one. */
 
-              _llerr("[repeats %d more times]\n", count);
+              ullinfo("[repeats %d more times]\n", count);
             }
         }
 
@@ -1456,13 +1456,13 @@ static int lpc31_qh_flush(struct lpc31_qh_s *qh)
 #ifdef CONFIG_LPC31_EHCI_REGDEBUG
 static void lpc31_qtd_print(struct lpc31_qtd_s *qtd)
 {
-  uerr("  QTD[%p]:\n", qtd);
-  uerr("    hw:\n");
-  uerr("      nqp: %08x alt: %08x token: %08x\n",
-       qtd->hw.nqp, qtd->hw.alt, qtd->hw.token);
-  uerr("      bpl: %08x %08x %08x %08x %08x\n",
-       qtd->hw.bpl[0], qtd->hw.bpl[1], qtd->hw.bpl[2],
-       qtd->hw.bpl[3], qtd->hw.bpl[4]);
+  uinfo("  QTD[%p]:\n", qtd);
+  uinfo("    hw:\n");
+  uinfo("      nqp: %08x alt: %08x token: %08x\n",
+        qtd->hw.nqp, qtd->hw.alt, qtd->hw.token);
+  uinfo("      bpl: %08x %08x %08x %08x %08x\n",
+        qtd->hw.bpl[0], qtd->hw.bpl[1], qtd->hw.bpl[2],
+        qtd->hw.bpl[3], qtd->hw.bpl[4]);
 }
 #endif
 
@@ -1480,30 +1480,30 @@ static void lpc31_qh_print(struct lpc31_qh_s *qh)
   struct lpc31_epinfo_s *epinfo;
   struct ehci_overlay_s *overlay;
 
-  uerr("QH[%p]:\n", qh);
-  uerr("  hw:\n");
-  uerr("    hlp: %08x epchar: %08x epcaps: %08x cqp: %08x\n",
-       qh->hw.hlp, qh->hw.epchar, qh->hw.epcaps, qh->hw.cqp);
+  uinfo("QH[%p]:\n", qh);
+  uinfo("  hw:\n");
+  uinfo("    hlp: %08x epchar: %08x epcaps: %08x cqp: %08x\n",
+        qh->hw.hlp, qh->hw.epchar, qh->hw.epcaps, qh->hw.cqp);
 
   overlay = &qh->hw.overlay;
-  uerr("  overlay:\n");
-  uerr("    nqp: %08x alt: %08x token: %08x\n",
-       overlay->nqp, overlay->alt, overlay->token);
-  uerr("    bpl: %08x %08x %08x %08x %08x\n",
-       overlay->bpl[0], overlay->bpl[1], overlay->bpl[2],
-       overlay->bpl[3], overlay->bpl[4]);
+  uinfo("  overlay:\n");
+  uinfo("    nqp: %08x alt: %08x token: %08x\n",
+        overlay->nqp, overlay->alt, overlay->token);
+  uinfo("    bpl: %08x %08x %08x %08x %08x\n",
+        overlay->bpl[0], overlay->bpl[1], overlay->bpl[2],
+        overlay->bpl[3], overlay->bpl[4]);
 
-  uerr("  fqp:\n", qh->fqp);
+  uinfo("  fqp:\n", qh->fqp);
 
   epinfo = qh->epinfo;
-  uerr("  epinfo[%p]:\n", epinfo);
+  uinfo("  epinfo[%p]:\n", epinfo);
   if (epinfo)
     {
-      uerr("    EP%d DIR=%s FA=%08x TYPE=%d MaxPacket=%d\n",
-           epinfo->epno, epinfo->dirin ? "IN" : "OUT", epinfo->devaddr,
-           epinfo->xfrtype, epinfo->maxpacket);
-      uerr("    Toggle=%d iocwait=%d speed=%d result=%d\n",
-           epinfo->toggle, epinfo->iocwait, epinfo->speed, epinfo->result);
+      uinfo("    EP%d DIR=%s FA=%08x TYPE=%d MaxPacket=%d\n",
+            epinfo->epno, epinfo->dirin ? "IN" : "OUT", epinfo->devaddr,
+            epinfo->xfrtype, epinfo->maxpacket);
+      uinfo("    Toggle=%d iocwait=%d speed=%d result=%d\n",
+            epinfo->toggle, epinfo->iocwait, epinfo->speed, epinfo->result);
     }
 }
 #endif
diff --git a/arch/arm/src/lpc31xx/lpc31_serial.c b/arch/arm/src/lpc31xx/lpc31_serial.c
index b46c0598fc0..bf5ac8cd586 100644
--- a/arch/arm/src/lpc31xx/lpc31_serial.c
+++ b/arch/arm/src/lpc31xx/lpc31_serial.c
@@ -560,7 +560,7 @@ static int up_interrupt(int irq, void *context)
 
           default:
             {
-              _err("Unexpected IIR: %02x\n", status);
+              _err("ERROR: Unexpected IIR: %02x\n", status);
               break;
             }
         }
diff --git a/arch/arm/src/lpc31xx/lpc31_spi.c b/arch/arm/src/lpc31xx/lpc31_spi.c
index 074bbe2b7d4..88d8ea6c00b 100644
--- a/arch/arm/src/lpc31xx/lpc31_spi.c
+++ b/arch/arm/src/lpc31xx/lpc31_spi.c
@@ -66,7 +66,7 @@
  * CONFIG_DEBUG_FEATURES must also be defined
  */
 
-#ifndef CONFIG_DEBUG_FEATURES
+#ifndef CONFIG_DEBUG_SPI_INFO
 #  undef CONFIG_LPC31_SPI_REGDEBUG
 #endif
 
@@ -207,7 +207,7 @@ static bool spi_checkreg(bool wr, uint32_t value, uint32_t address)
     {
       if (g_ntimes > 0)
         {
-          _llerr("...[Repeats %d times]...\n", g_ntimes);
+          spillinfo("...[Repeats %d times]...\n", g_ntimes);
         }
 
       g_wrlast      = wr;
@@ -239,7 +239,7 @@ static void spi_putreg(uint32_t value, uint32_t address)
 {
   if (spi_checkreg(true, value, address))
     {
-      _llerr("%08x<-%08x\n", address, value);
+      spillinfo("%08x<-%08x\n", address, value);
     }
   putreg32(value, address);
 }
@@ -265,7 +265,7 @@ static uint32_t spi_getreg(uint32_t address)
   uint32_t value = getreg32(address);
   if (spi_checkreg(false, value, address))
     {
-      _llerr("%08x->%08x\n", address, value);
+      spillinfo("%08x->%08x\n", address, value);
     }
   return value;
 }
@@ -921,10 +921,10 @@ FAR struct spi_dev_s *lpc31_spibus_initialize(int port)
    */
 
 #ifdef CONFIG_LPC31_SPI_REGDEBUG
-  _llerr("PINS: %08x MODE0: %08x MODE1: %08x\n",
-        spi_getreg(LPC31_IOCONFIG_SPI_PINS),
-        spi_getreg(LPC31_IOCONFIG_SPI_MODE0),
-        spi_getreg(LPC31_IOCONFIG_SPI_MODE1));
+  spiinfo("PINS: %08x MODE0: %08x MODE1: %08x\n",
+          spi_getreg(LPC31_IOCONFIG_SPI_PINS),
+          spi_getreg(LPC31_IOCONFIG_SPI_MODE0),
+          spi_getreg(LPC31_IOCONFIG_SPI_MODE1));
 #endif
 
   /* Enable SPI clocks */
diff --git a/arch/arm/src/lpc31xx/lpc31_usbdev.c b/arch/arm/src/lpc31xx/lpc31_usbdev.c
index f75eb1aa529..a596915536d 100644
--- a/arch/arm/src/lpc31xx/lpc31_usbdev.c
+++ b/arch/arm/src/lpc31xx/lpc31_usbdev.c
@@ -343,7 +343,7 @@ struct lpc31_usbdev_s
 
 /* Register operations ********************************************************/
 
-#if defined(CONFIG_LPC31_USBDEV_REGDEBUG) && defined(CONFIG_DEBUG_FEATURES)
+#ifdef CONFIG_LPC31_USBDEV_REGDEBUG
 static uint32_t lpc31_getreg(uint32_t addr);
 static void lpc31_putreg(uint32_t val, uint32_t addr);
 #else
@@ -480,7 +480,7 @@ static const struct usbdev_ops_s g_devops =
  *
  ****************************************************************************/
 
-#if defined(CONFIG_LPC31_USBDEV_REGDEBUG) && defined(CONFIG_DEBUG_FEATURES)
+#ifdef CONFIG_LPC31_USBDEV_REGDEBUG
 static uint32_t lpc31_getreg(uint32_t addr)
 {
   static uint32_t prevaddr = 0;
@@ -501,7 +501,7 @@ static uint32_t lpc31_getreg(uint32_t addr)
         {
           if (count == 4)
             {
-              _llerr("...\n");
+              ullinfo("...\n");
             }
 
           return val;
@@ -518,7 +518,7 @@ static uint32_t lpc31_getreg(uint32_t addr)
         {
           /* Yes.. then show how many times the value repeated */
 
-          _llerr("[repeats %d more times]\n", count-3);
+          ullinfo("[repeats %d more times]\n", count-3);
         }
 
       /* Save the new address, value, and count */
@@ -530,7 +530,7 @@ static uint32_t lpc31_getreg(uint32_t addr)
 
   /* Show the register value read */
 
-  _llerr("%08x->%08x\n", addr, val);
+  ullinfo("%08x->%08x\n", addr, val);
   return val;
 }
 #endif
@@ -543,12 +543,12 @@ static uint32_t lpc31_getreg(uint32_t addr)
  *
  ****************************************************************************/
 
-#if defined(CONFIG_LPC31_USBDEV_REGDEBUG) && defined(CONFIG_DEBUG_FEATURES)
+#ifdef CONFIG_LPC31_USBDEV_REGDEBUG
 static void lpc31_putreg(uint32_t val, uint32_t addr)
 {
   /* Show the register value being written */
 
-  _llerr("%08x<-%08x\n", addr, val);
+  ullinfo("%08x<-%08x\n", addr, val);
 
   /* Write the value */