diff --git a/drivers/mtd/spi/sf_internal.h b/drivers/mtd/spi/sf_internal.h
index 8793f18..85c8a89 100644
--- a/drivers/mtd/spi/sf_internal.h
+++ b/drivers/mtd/spi/sf_internal.h
@@ -64,6 +64,7 @@
 #define SPI_FLASH_CFI_MFR_SPANSION	0x01
 #define SPI_FLASH_CFI_MFR_STMICRO	0x20
 #define SPI_FLASH_CFI_MFR_MACRONIX	0xc2
+#define SPI_FLASH_CFI_MFR_SST		0xbf
 #define SPI_FLASH_CFI_MFR_WINBOND	0xef
 
 /* Erase commands */
diff --git a/drivers/mtd/spi/sf_ops.c b/drivers/mtd/spi/sf_ops.c
index 384224d..4065520 100644
--- a/drivers/mtd/spi/sf_ops.c
+++ b/drivers/mtd/spi/sf_ops.c
@@ -583,7 +583,7 @@
 }
 #endif
 
-#ifdef CONFIG_SPI_FLASH_STMICRO
+#if defined(CONFIG_SPI_FLASH_STMICRO) || defined(CONFIG_SPI_FLASH_SST)
 static void stm_get_locked_range(struct spi_flash *flash, u8 sr, loff_t *ofs,
 				 u32 *len)
 {
@@ -750,4 +750,4 @@
 
 	return 0;
 }
-#endif  /* CONFIG_SPI_FLASH_STMICRO */
+#endif
diff --git a/drivers/mtd/spi/sf_probe.c b/drivers/mtd/spi/sf_probe.c
index bc05d30..52dace4 100644
--- a/drivers/mtd/spi/sf_probe.c
+++ b/drivers/mtd/spi/sf_probe.c
@@ -184,8 +184,9 @@
 
 	/* lock hooks are flash specific - assign them based on idcode0 */
 	switch (idcode[0]) {
-#ifdef CONFIG_SPI_FLASH_STMICRO
+#if defined(CONFIG_SPI_FLASH_STMICRO) || defined(CONFIG_SPI_FLASH_SST)
 	case SPI_FLASH_CFI_MFR_STMICRO:
+	case SPI_FLASH_CFI_MFR_SST:
 		flash->flash_lock = stm_lock;
 		flash->flash_unlock = stm_unlock;
 		flash->flash_is_locked = stm_is_locked;