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authorLothar Waßmann <LW@KARO-electronics.de>2014-03-28 11:35:06 +0100
committerBrian Norris <computersforpeace@gmail.com>2014-07-27 22:06:31 -0700
commit2a500afe1e0e84c7a126df693dbd01353756dcfa (patch)
tree278caaa0a91938c570c217f0b64d954724b1747d /Documentation
parentd8c0372baadb29e60668c2bddfcf39294f3d4581 (diff)
mtd: gpmi: make blockmark swapping optional
With a flash-based BBT there is no reason to move the Factory Bad Block Marker from the data area buffer (to where it is mapped by the GPMI NAND controller) to the OOB buffer. Thus, make this feature configurable via DT. This is required for the Ka-Ro electronics platforms. In the original code 'this->swap_block_mark' was synonymous with '!GPMI_IS_MX23()', so use the latter at the relevant places. Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de> Acked-by: Huang Shijie <b32955@freescale.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/mtd/gpmi-nand.txt10
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mtd/gpmi-nand.txt b/Documentation/devicetree/bindings/mtd/gpmi-nand.txt
index 458d59634688..a011fdf61dbf 100644
--- a/Documentation/devicetree/bindings/mtd/gpmi-nand.txt
+++ b/Documentation/devicetree/bindings/mtd/gpmi-nand.txt
@@ -25,6 +25,16 @@ Optional properties:
discoverable or this property is not enabled,
the software may chooses an implementation-defined
ECC scheme.
+ - fsl,no-blockmark-swap: Don't swap the bad block marker from the OOB
+ area with the byte in the data area but rely on the
+ flash based BBT for identifying bad blocks.
+ NOTE: this is only valid in conjunction with
+ 'nand-on-flash-bbt'.
+ WARNING: on i.MX28 blockmark swapping cannot be
+ disabled for the BootROM in the FCB. Thus,
+ partitions written from Linux with this feature
+ turned on may not be accessible by the BootROM
+ code.
The device tree may optionally contain sub-nodes describing partitions of the
address space. See partition.txt for more detail.