linux-kernel - Re: [PATCH v5 2/2] dt-bindings: mtd: Document Macronix NAND device bindings

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Date:   Wed, 11 Mar 2020 08:45:41 +0100
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     Mason Yang <masonccyang@...c.com.tw>
Cc:     richard@....at, vigneshr@...com, robh+dt@...nel.org,
        mark.rutland@....com, devicetree@...r.kernel.org,
        tglx@...utronix.de, juliensu@...c.com.tw,
        frieder.schrempf@...tron.de, allison@...utok.net,
        linux-kernel@...r.kernel.org, linux-mtd@...ts.infradead.org,
        yuehaibing@...wei.com
Subject: Re: [PATCH v5 2/2] dt-bindings: mtd: Document Macronix NAND device
 bindings

Hi Mason,

Mason Yang <masonccyang@...c.com.tw> wrote on Mon, 17 Feb 2020 14:56:40
+0800:

> Document the bindings used by the Macronix NAND device.
> 
> Signed-off-by: Mason Yang <masonccyang@...c.com.tw>
> Reviewed-by: Rob Herring <robh@...nel.org>
> ---
>  .../devicetree/bindings/mtd/nand-macronix.txt      | 28 ++++++++++++++++++++++
>  1 file changed, 28 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..1d7a895
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mtd/nand-macronix.txt
> @@ -0,0 +1,28 @@
> +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 are
> +subpage accesses prohibited and more time period is needed in program
> +operation, i.e., tPROG 300us to 340us(randomizer enabled).
> +Randomizer enabled is a one time persistent and non reversible operatoin.
> +
> +For more high-reliability concern, if subpage write not available with
> +hardware ECC and filesystem and then to enable randomizer is recommended
> +by default.
> +
> +By adding a new specific property in children nodes to enable
> +randomizer function.

I also reworded slightly this text when applying.


Thanks,
Miquèl