mtd: spi-nor: factor out replace-able flash_{lock,unlock}

Flash lock/unlock is a flash-specific operations. Factor out a callback
for it to more readily support other vendors.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Tested-by: VIET NGA DAO <vndao@altera.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h
index 4720b86ee73d..e5409524bb0a 100644
--- a/include/linux/mtd/spi-nor.h
+++ b/include/linux/mtd/spi-nor.h
@@ -155,6 +155,8 @@ enum spi_nor_option_flags {
  * @write:              [DRIVER-SPECIFIC] write data to the SPI NOR
  * @erase:              [DRIVER-SPECIFIC] erase a sector of the SPI NOR
  *                      at the offset @offs
+ * @lock:               [FLASH-SPECIFIC] lock a region of the SPI NOR
+ * @unlock:             [FLASH-SPECIFIC] unlock a region of the SPI NOR
  * @priv:               the private data
  */
 struct spi_nor {
@@ -189,6 +191,9 @@ struct spi_nor {
                         size_t len, size_t *retlen, const u_char *write_buf);
         int (*erase)(struct spi_nor *nor, loff_t offs);
 
+        int (*flash_lock)(struct spi_nor *nor, loff_t ofs, uint64_t len);
+        int (*flash_unlock)(struct spi_nor *nor, loff_t ofs, uint64_t len);
+
         void *priv;
 };