diff --git a/system/cpuinfo.c b/system/cpuinfo.c
index 97a3b82..cba579c 100644
--- a/system/cpuinfo.c
+++ b/system/cpuinfo.c
@@ -493,6 +493,9 @@ static void determine_imc(void)
               case 0x9:
                 imc_type = IMC_KBL;         // Core 7/8/9th Gen (Kaby/Coffee/Comet Lake)
                 break;
+              case 0xB:
+                imc_type = IMC_ADL_N;       // Core 12th Gen (Alder Lake-N - Gracemont E-Cores only)
+                break;
               default:
                 break;
             }
diff --git a/system/cpuinfo.h b/system/cpuinfo.h
index 7e2f97b..5975b0e 100644
--- a/system/cpuinfo.h
+++ b/system/cpuinfo.h
@@ -8,7 +8,7 @@
  *
  *//*
  * Copyright (C) 2020-2022 Martin Whitaker.
- * Copyright (C) 2004-2022 Sam Demeulemeester.
+ * Copyright (C) 2004-2023 Sam Demeulemeester.
  */
 
 #include <stdbool.h>
@@ -47,6 +47,7 @@
 #define IMC_KBL_UY      0x3030  // Core 7/8/9th Gen (Kaby/Coffee/Comet/Amber Lake-U/Y)
 #define IMC_ICL         0x3040  // Core 10th Gen (IceLake-Y)
 #define IMC_TGL         0x3050  // Core 11th Gen (Tiger Lake-U)
+#define IMC_ADL_N       0x3061  // Core 12th Gen (Alder Lake-N - Gracemont E-Cores only)
 
 #define IMC_BYT         0x4010  // Atom Bay Trail
 #define IMC_CDT         0x4020  // Atom Cedar Trail
diff --git a/system/hwquirks.c b/system/hwquirks.c
index f1fd0ed..e5e9359 100644
--- a/system/hwquirks.c
+++ b/system/hwquirks.c
@@ -99,6 +99,15 @@ static void amd_k8_revfg_temp(void)
     cpu_temp_offset = 21.0f;
 }
 
+static void adl_unlock_smbus(void)
+{
+    uint16_t x = pci_config_read16(0, 31, 4, 0x04);
+
+    if (!(x & 1)) {
+        pci_config_write16(0, 31, 4, 0x04, x | 1);
+    }
+}
+
 // ---------------------
 // -- Public function --
 // ---------------------
@@ -199,4 +208,13 @@ void quirks_init(void)
             }
         }
     }
+
+    //  --------------------------------------------------
+    //  -- SMBus unlock for ADL-N (and probably others) --
+    //  --------------------------------------------------
+    if (imc_type == IMC_ADL_N && pci_config_read16(0, 31, 4, 0x2) == 0x54A3) {     // ADL-N
+        quirk.id    = QUIRK_ADL_SMB_UNLOCK;
+        quirk.type |= QUIRK_TYPE_SMBUS;
+        quirk.process = adl_unlock_smbus;
+    }
 }
diff --git a/system/hwquirks.h b/system/hwquirks.h
index daf22b8..152877f 100644
--- a/system/hwquirks.h
+++ b/system/hwquirks.h
@@ -28,7 +28,8 @@ typedef enum {
     QUIRK_X10SDV_NOSMP,
     QUIRK_K8_BSTEP_NOTEMP,
     QUIRK_K8_REVFG_TEMP,
-    QUIRK_AMD_ERRATA_319
+    QUIRK_AMD_ERRATA_319,
+    QUIRK_ADL_SMB_UNLOCK
 } quirk_id_t;
 
 typedef struct {