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34a82443b7
Now that we can tell when we have one of the newer DataFlash chips, optionally expose the 128 bytes of OTP memory they provide. Tested on at45db642 revision B and D chips. Switch mtdchar over to a generic HAVE_MTD_OTP flag instead of adding another #ifdef for each type of chip whose driver has OTP support. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Bryan Wu <cooloney@kernel.org> Cc: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
68 lines
2.1 KiB
Plaintext
68 lines
2.1 KiB
Plaintext
#
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# linux/drivers/mtd/onenand/Kconfig
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#
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menuconfig MTD_ONENAND
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tristate "OneNAND Device Support"
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depends on MTD
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help
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This enables support for accessing all type of OneNAND flash
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devices. For further information see
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<http://www.samsung.com/Products/Semiconductor/OneNAND/index.htm>
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if MTD_ONENAND
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config MTD_ONENAND_VERIFY_WRITE
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bool "Verify OneNAND page writes"
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help
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This adds an extra check when data is written to the flash. The
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OneNAND flash device internally checks only bits transitioning
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from 1 to 0. There is a rare possibility that even though the
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device thinks the write was successful, a bit could have been
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flipped accidentally due to device wear or something else.
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config MTD_ONENAND_GENERIC
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tristate "OneNAND Flash device via platform device driver"
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depends on ARM
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help
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Support for OneNAND flash via platform device driver.
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config MTD_ONENAND_OTP
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bool "OneNAND OTP Support"
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select HAVE_MTD_OTP
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help
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One Block of the NAND Flash Array memory is reserved as
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a One-Time Programmable Block memory area.
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Also, 1st Block of NAND Flash Array can be used as OTP.
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The OTP block can be read, programmed and locked using the same
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operations as any other NAND Flash Array memory block.
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OTP block cannot be erased.
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OTP block is fully-guaranteed to be a valid block.
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config MTD_ONENAND_2X_PROGRAM
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bool "OneNAND 2X program support"
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help
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The 2X Program is an extension of Program Operation.
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Since the device is equipped with two DataRAMs, and two-plane NAND
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Flash memory array, these two component enables simultaneous program
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of 4KiB. Plane1 has only even blocks such as block0, block2, block4
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while Plane2 has only odd blocks such as block1, block3, block5.
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So MTD regards it as 4KiB page size and 256KiB block size
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Now the following chips support it. (KFXXX16Q2M)
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Demux: KFG2G16Q2M, KFH4G16Q2M, KFW8G16Q2M,
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Mux: KFM2G16Q2M, KFN4G16Q2M,
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And more recent chips
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config MTD_ONENAND_SIM
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tristate "OneNAND simulator support"
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depends on MTD_PARTITIONS
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help
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The simulator may simulate various OneNAND flash chips for the
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OneNAND MTD layer.
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endif # MTD_ONENAND
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