Hi Mason,
Mason Yang <masonccyang@xxxxxxxxxxx> wrote on Thu, 24 Oct 2019 15:40:07
+0800:
> Document the bindings used by the Macronix NAND device.
>
> Signed-off-by: Mason Yang <masonccyang@xxxxxxxxxxx>
> ---
> .../devicetree/bindings/mtd/nand-macronix.txt | 20 ++++++++++++++++++++
> 1 file changed, 20 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/mtd/nand-macronix.txt
>
> diff --git a/Documentation/devicetree/bindings/mtd/nand-macronix.txt b/Documentation/devicetree/bindings/mtd/nand-macronix.txt
> new file mode 100644
> index 0000000..cb60358
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mtd/nand-macronix.txt
> @@ -0,0 +1,20 @@
> +Macronix NANDs Device Tree Bindings
> +-----------------------------------
> +
> +Macronix NANDs support randomizer operation for user data scrambled,
> +which can be enabled with a SET_FEATURE. The penalty of randomizer
> +is subpage accesses prohibited. By adding a new specific property
> +in children nodes to enable randomizer function.
You don't mention the performance penalty nor the benefits of such
operation.
Please also insist on the fact that this is a one time persistent, non
reversible operation and the use should use this property only if they
know what they are doing!
> +
> +Required NAND chip properties in children mode:
> +- randomizer enable: should be "mxic,enable-randomizer-otp"
> +
> +Example:
> +
> + nand: nand-controller@unit-address {
> +
> + nand@0 {
> + reg = <0>;
> + mxic,enable-randomizer-otp;
> + };
> + };
Thanks,
Miquèl
