+#define SST26_CMD_READ_BPR 0x72
+#define SST26_CMD_WRITE_BPR 0x42
+
+#define SST26_BPR_8K_NUM 4
+#define SST26_MAX_BPR_REG_LEN (18 + 1)
+#define SST26_BOUND_REG_SIZE ((32 + SST26_BPR_8K_NUM * 8) * SZ_1K)
+
+enum lock_ctl {
+ SST26_CTL_LOCK,
+ SST26_CTL_UNLOCK,
+ SST26_CTL_CHECK
+};
+