diff --git a/drivers/crypto/crypto_npcx_sha.c b/drivers/crypto/crypto_npcx_sha.c
index e2420134cfa..26403599360 100644
--- a/drivers/crypto/crypto_npcx_sha.c
+++ b/drivers/crypto/crypto_npcx_sha.c
@@ -14,7 +14,7 @@
 LOG_MODULE_REGISTER(sha_npcx, CONFIG_CRYPTO_LOG_LEVEL);
 
 #define NPCX_HASH_CAPS_SUPPORT	(CAP_SEPARATE_IO_BUFS | CAP_SYNC_OPS)
-#define NPCX_SHA256_HANDLE_SIZE 212
+#define NPCX_SHA256_HANDLE_SIZE DT_INST_PROP(0, context_buffer_size)
 #define NPCX_SHA_MAX_SESSION	1
 
 /* The status code returns from Nuvoton Cryptographic Library ROM APIs */
diff --git a/dts/arm/nuvoton/npcx/npcx4.dtsi b/dts/arm/nuvoton/npcx/npcx4.dtsi
index 56adb416d01..54616fbeed4 100644
--- a/dts/arm/nuvoton/npcx/npcx4.dtsi
+++ b/dts/arm/nuvoton/npcx/npcx4.dtsi
@@ -292,6 +292,7 @@
 		sha0: sha@13c {
 			compatible = "nuvoton,npcx-sha";
 			reg = <0x13c 0x3c>;
+			context-buffer-size = <228>;
 			status = "disabled";
 		};
 	};
diff --git a/dts/arm/nuvoton/npcx/npcx9.dtsi b/dts/arm/nuvoton/npcx/npcx9.dtsi
index 18a1278de57..4d0cb7dc69e 100644
--- a/dts/arm/nuvoton/npcx/npcx9.dtsi
+++ b/dts/arm/nuvoton/npcx/npcx9.dtsi
@@ -269,6 +269,7 @@
 		sha0: sha@13c {
 			compatible = "nuvoton,npcx-sha";
 			reg = <0x13c 0x3c>;
+			context-buffer-size = <212>;
 			status = "disabled";
 		};
 	};
diff --git a/dts/bindings/crypto/nuvoton,npcx-sha.yaml b/dts/bindings/crypto/nuvoton,npcx-sha.yaml
index 2670855d45b..237490840ad 100644
--- a/dts/bindings/crypto/nuvoton,npcx-sha.yaml
+++ b/dts/bindings/crypto/nuvoton,npcx-sha.yaml
@@ -10,3 +10,10 @@ include: base.yaml
 properties:
   reg:
     required: true
+
+  context-buffer-size:
+    type: int
+    required: true
+    description: |
+      Size of the pre-allocated buffer for the SHA ROM API to store the
+      intermdiate computation result and final digest.