[MTD] dataflash OTP support

[mirror_ubuntu-bionic-kernel.git] / drivers / mtd / devices / Kconfig

diff --git a/drivers/mtd/devices/Kconfig b/drivers/mtd/devices/Kconfig
index 9c613f06623cd4d1191eafb7e6d4adfb75736037..88f4df047464a0f1c207ab2b0cda07b93faf7cf6 100644 (file)
--- a/drivers/mtd/devices/Kconfig
+++ b/drivers/mtd/devices/Kconfig
@@ -59,6 +59,17 @@ config MTD_DATAFLASH
          Sometimes DataFlash chips are packaged inside MMC-format
          cards; at this writing, the MMC stack won't handle those.
 
+config MTD_DATAFLASH_OTP
+       bool "DataFlash OTP support (Security Register)"
+       depends on MTD_DATAFLASH
+       select HAVE_MTD_OTP
+       help
+         Newer DataFlash chips (revisions C and D) support 128 bytes of
+         one-time-programmable (OTP) data.  The first half may be written
+         (once) with up to 64 bytes of data, such as a serial number or
+         other key product data.  The second half is programmed with a
+         unique-to-each-chip bit pattern at the factory.
+
 config MTD_M25P80
        tristate "Support most SPI Flash chips (AT26DF, M25P, W25X, ...)"
        depends on SPI_MASTER && EXPERIMENTAL