diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h
index 2a9dcc15d29245acf2d164eafea26cbe4dda0cc1..a948fc586b9b8406d44b5e35f4e50c1ed436830e 100644
--- a/include/acpi/actbl2.h
+++ b/include/acpi/actbl2.h
@@ -1251,19 +1251,13 @@ struct acpi_table_tpm2 {
 	/* Platform-specific data follows */
 };
 
-/* Control area structure (not part of table, pointed to by control_address) */
+/* Values for start_method above */
 
-struct acpi_tpm2_control {
-	u32 reserved;
-	u32 error;
-	u32 cancel;
-	u32 start;
-	u64 interrupt_control;
-	u32 command_size;
-	u64 command_address;
-	u32 response_size;
-	u64 response_address;
-};
+#define ACPI_TPM2_NOT_ALLOWED                       0
+#define ACPI_TPM2_START_METHOD                      2
+#define ACPI_TPM2_MEMORY_MAPPED                     6
+#define ACPI_TPM2_COMMAND_BUFFER                    7
+#define ACPI_TPM2_COMMAND_BUFFER_WITH_START_METHOD  8
 
 /*******************************************************************************
  *