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Document the bindings used by the Macronix NAND device. Signed-off-by: Mason Yang <masonccyang@mxic.com.tw> Reviewed-by: Rob Herring <robh@kernel.org> [<miquel.raynal@bootlin.com: Fix typos] Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Link: https://lore.kernel.org/linux-mtd/1581922600-25461-3-git-send-email-masonccyang@mxic.com.tw
27 lines
883 B
Text
27 lines
883 B
Text
Macronix NANDs Device Tree Bindings
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-----------------------------------
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Macronix NANDs support randomizer operation for scrambling user data,
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which can be enabled with a SET_FEATURE. The penalty when using the
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randomizer are subpage accesses prohibited and more time period needed
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for program operation, i.e., tPROG 300us to 340us (randomizer enabled).
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Enabling the randomizer is a one time persistent and non reversible
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operation.
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For more high-reliability concern, if subpage write is not available
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with hardware ECC and not enabled at UBI level, then enabling the
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randomizer is recommended by default by adding a new specific property
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in children nodes.
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Required NAND chip properties in children mode:
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- randomizer enable: should be "mxic,enable-randomizer-otp"
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Example:
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nand: nand-controller@unit-address {
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nand@0 {
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reg = <0>;
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mxic,enable-randomizer-otp;
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};
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};
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