diff --git a/Platform/Socionext/DeveloperBox/DeveloperBox.dsc b/Platform/Socionext/DeveloperBox/DeveloperBox.dsc
index b73e88c5..6c084efa 100644
--- a/Platform/Socionext/DeveloperBox/DeveloperBox.dsc
+++ b/Platform/Socionext/DeveloperBox/DeveloperBox.dsc
@@ -381,6 +381,9 @@
   gEfiMdeModulePkgTokenSpaceGuid.PcdAcpiDefaultCreatorId|0x4f524e4c # LNRO
   gEfiMdeModulePkgTokenSpaceGuid.PcdAcpiDefaultCreatorRevision|1
 
+  # set DIP switch DSW3-PIN1 (GPIO pin PD[0] on the SoC) to clear the varstore
+  gSynQuacerTokenSpaceGuid.PcdClearSettingsGpioPin|0
+
 [PcdsPatchableInModule]
   gEfiMdeModulePkgTokenSpaceGuid.PcdVideoHorizontalResolution|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdVideoVerticalResolution|0
@@ -418,6 +421,7 @@
   MdeModulePkg/Universal/FaultTolerantWritePei/FaultTolerantWritePei.inf
   MdeModulePkg/Universal/Variable/Pei/VariablePei.inf
   MdeModulePkg/Universal/CapsulePei/CapsulePei.inf
+  Silicon/Socionext/SynQuacer/Drivers/SynQuacerGpioPei/SynQuacerGpioPei.inf
   MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf {
     <LibraryClasses>
       NULL|MdeModulePkg/Library/LzmaCustomDecompressLib/LzmaCustomDecompressLib.inf
diff --git a/Platform/Socionext/DeveloperBox/DeveloperBox.fdf b/Platform/Socionext/DeveloperBox/DeveloperBox.fdf
index 34100bb6..6cc523fa 100644
--- a/Platform/Socionext/DeveloperBox/DeveloperBox.fdf
+++ b/Platform/Socionext/DeveloperBox/DeveloperBox.fdf
@@ -258,6 +258,7 @@ READ_LOCK_STATUS   = TRUE
   INF MdeModulePkg/Universal/FaultTolerantWritePei/FaultTolerantWritePei.inf
   INF MdeModulePkg/Universal/Variable/Pei/VariablePei.inf
   INF MdeModulePkg/Universal/CapsulePei/CapsulePei.inf
+  INF Silicon/Socionext/SynQuacer/Drivers/SynQuacerGpioPei/SynQuacerGpioPei.inf
   INF RuleOverride = FMP_IMAGE_DESC Platform/Socionext/DeveloperBox/SystemFirmwareDescriptor/SystemFirmwareDescriptor.inf
   INF MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf
 
diff --git a/Platform/Socionext/SynQuacerEvalBoard/SynQuacerEvalBoard.dsc b/Platform/Socionext/SynQuacerEvalBoard/SynQuacerEvalBoard.dsc
index dd1469de..c8a9f39c 100644
--- a/Platform/Socionext/SynQuacerEvalBoard/SynQuacerEvalBoard.dsc
+++ b/Platform/Socionext/SynQuacerEvalBoard/SynQuacerEvalBoard.dsc
@@ -369,6 +369,9 @@
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase|0x08420000
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareSize|0x00010000
 
+  # set DIP switch DSW3-PIN1 (GPIO pin PD[0] on the SoC) to clear the varstore
+  gSynQuacerTokenSpaceGuid.PcdClearSettingsGpioPin|0
+
 [PcdsPatchableInModule]
   gEfiMdeModulePkgTokenSpaceGuid.PcdVideoHorizontalResolution|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdVideoVerticalResolution|0
@@ -406,6 +409,7 @@
   MdeModulePkg/Universal/FaultTolerantWritePei/FaultTolerantWritePei.inf
   MdeModulePkg/Universal/Variable/Pei/VariablePei.inf
   MdeModulePkg/Universal/CapsulePei/CapsulePei.inf
+  Silicon/Socionext/SynQuacer/Drivers/SynQuacerGpioPei/SynQuacerGpioPei.inf
   MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf {
     <LibraryClasses>
       NULL|MdeModulePkg/Library/LzmaCustomDecompressLib/LzmaCustomDecompressLib.inf
diff --git a/Platform/Socionext/SynQuacerEvalBoard/SynQuacerEvalBoard.fdf b/Platform/Socionext/SynQuacerEvalBoard/SynQuacerEvalBoard.fdf
index 365085c8..4577bd31 100644
--- a/Platform/Socionext/SynQuacerEvalBoard/SynQuacerEvalBoard.fdf
+++ b/Platform/Socionext/SynQuacerEvalBoard/SynQuacerEvalBoard.fdf
@@ -248,6 +248,7 @@ READ_LOCK_STATUS   = TRUE
   INF MdeModulePkg/Universal/FaultTolerantWritePei/FaultTolerantWritePei.inf
   INF MdeModulePkg/Universal/Variable/Pei/VariablePei.inf
   INF MdeModulePkg/Universal/CapsulePei/CapsulePei.inf
+  INF Silicon/Socionext/SynQuacer/Drivers/SynQuacerGpioPei/SynQuacerGpioPei.inf
   INF RuleOverride = FMP_IMAGE_DESC Platform/Socionext/SynQuacerEvalBoard/SystemFirmwareDescriptor/SystemFirmwareDescriptor.inf
   INF MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf
 
diff --git a/Silicon/Socionext/SynQuacer/Library/SynQuacerPlatformPeiLib/SynQuacerPlatformPeiLib.c b/Silicon/Socionext/SynQuacer/Library/SynQuacerPlatformPeiLib/SynQuacerPlatformPeiLib.c
index 358dd5a9..e4aec8b0 100644
--- a/Silicon/Socionext/SynQuacer/Library/SynQuacerPlatformPeiLib/SynQuacerPlatformPeiLib.c
+++ b/Silicon/Socionext/SynQuacer/Library/SynQuacerPlatformPeiLib/SynQuacerPlatformPeiLib.c
@@ -21,8 +21,11 @@
 #include <Library/PeiServicesLib.h>
 #include <Platform/DramInfo.h>
 #include <Ppi/DramInfo.h>
+#include <Ppi/EmbeddedGpio.h>
 #include <Ppi/MemoryDiscovered.h>
 
+#define CLEAR_SETTINGS_GPIO_NOT_IMPLEMENTED   MAX_UINT8
+
 STATIC
 CONST DRAM_INFO *mDramInfo = (VOID *)(UINTN)FixedPcdGet64 (PcdDramInfoBase);
 
@@ -103,10 +106,35 @@ PlatformPeim (
   VOID
   )
 {
-  EFI_STATUS      Status;
+  EMBEDDED_GPIO_PPI   *Gpio;
+  EFI_STATUS          Status;
+  UINTN               Value;
+  UINT8               Pin;
 
   ASSERT (mDramInfo->NumRegions > 0);
 
+  Pin = FixedPcdGet8 (PcdClearSettingsGpioPin);
+  if (Pin != CLEAR_SETTINGS_GPIO_NOT_IMPLEMENTED) {
+    Status = PeiServicesLocatePpi (&gEdkiiEmbeddedGpioPpiGuid, 0, NULL,
+               (VOID **)&Gpio);
+    ASSERT_EFI_ERROR (Status);
+
+    Status = Gpio->Set (Gpio, Pin, GPIO_MODE_INPUT);
+    if (EFI_ERROR (Status)) {
+      DEBUG ((DEBUG_WARN, "%a: failed to set GPIO as input - %r\n",
+        __FUNCTION__, Status));
+    } else {
+      Status = Gpio->Get (Gpio, Pin, &Value);
+      if (EFI_ERROR (Status)) {
+        DEBUG ((DEBUG_WARN, "%a: failed to get GPIO state - %r\n",
+          __FUNCTION__, Status));
+      } else if (Value > 0) {
+        DEBUG ((DEBUG_INFO, "%a: clearing NVRAM\n", __FUNCTION__));
+        PeiServicesSetBootMode (BOOT_WITH_DEFAULT_SETTINGS);
+      }
+    }
+  }
+
   //
   // Record the first region into PcdSystemMemoryBase and PcdSystemMemorySize.
   // This is the region we will use for UEFI itself.
diff --git a/Silicon/Socionext/SynQuacer/Library/SynQuacerPlatformPeiLib/SynQuacerPlatformPeiLib.inf b/Silicon/Socionext/SynQuacer/Library/SynQuacerPlatformPeiLib/SynQuacerPlatformPeiLib.inf
index 70eb715d..a6501fb2 100644
--- a/Silicon/Socionext/SynQuacer/Library/SynQuacerPlatformPeiLib/SynQuacerPlatformPeiLib.inf
+++ b/Silicon/Socionext/SynQuacer/Library/SynQuacerPlatformPeiLib/SynQuacerPlatformPeiLib.inf
@@ -25,6 +25,7 @@
 
 [Packages]
   ArmPkg/ArmPkg.dec
+  EmbeddedPkg/EmbeddedPkg.dec
   MdePkg/MdePkg.dec
   MdeModulePkg/MdeModulePkg.dec
   Silicon/Socionext/SynQuacer/SynQuacer.dec
@@ -40,11 +41,16 @@
 [FixedPcd]
   gArmTokenSpaceGuid.PcdFvBaseAddress
   gArmTokenSpaceGuid.PcdFvSize
+  gSynQuacerTokenSpaceGuid.PcdClearSettingsGpioPin
   gSynQuacerTokenSpaceGuid.PcdDramInfoBase
 
 [Ppis]
+  gEdkiiEmbeddedGpioPpiGuid             ## CONSUMES
   gSynQuacerDramInfoPpiGuid             ## PRODUCES
 
 [Pcd]
   gArmTokenSpaceGuid.PcdSystemMemoryBase
   gArmTokenSpaceGuid.PcdSystemMemorySize
+
+[Depex]
+  gEdkiiEmbeddedGpioPpiGuid
diff --git a/Silicon/Socionext/SynQuacer/SynQuacer.dec b/Silicon/Socionext/SynQuacer/SynQuacer.dec
index 1a683b81..4e5ccea6 100644
--- a/Silicon/Socionext/SynQuacer/SynQuacer.dec
+++ b/Silicon/Socionext/SynQuacer/SynQuacer.dec
@@ -30,3 +30,6 @@
 
   gSynQuacerTokenSpaceGuid.PcdNetsecEepromBase|0|UINT32|0x00000002
   gSynQuacerTokenSpaceGuid.PcdNetsecPhyAddress|0|UINT8|0x00000003
+
+  # GPIO pin index [0 .. 31] or MAX_UINT8 for not implemented
+  gSynQuacerTokenSpaceGuid.PcdClearSettingsGpioPin|0xFF|UINT8|0x00000004