sf: Add lock ops for SST SPI NOR flash

SST SPI NOR flash has the same locking programming bits
as ST Micro - added support for it.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
[Minor change on commit message]
Signed-off-by: Jagan Teki <jteki@openedev.com>
Reviewed-by: Jagan Teki <jteki@openedev.com>

drivers/mtd/spi/sf_internal.h

@@ -64,6 +64,7 @@ enum spi_nor_option_flags {
 #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 */

drivers/mtd/spi/sf_ops.c

@@ -583,7 +583,7 @@ int sst_write_bp(struct spi_flash *flash, u32 offset, size_t len,
 }
 #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 @@ int stm_unlock(struct spi_flash *flash, u32 ofs, size_t len)
 
 	return 0;
 }
-#endif  /* CONFIG_SPI_FLASH_STMICRO */
+#endif

drivers/mtd/spi/sf_probe.c

@@ -184,8 +184,9 @@ static int spi_flash_validate_params(struct spi_slave *spi, u8 *idcode,
 
 	/* 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;