Re: [PATCH 1/2] mtd: spi-nand: Add support for randomizer

From: Cheng Ming Lin <linchengming884@gmail.com>
To: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: vigneshr@ti.com, linux-mtd@lists.infradead.org,
	 linux-kernel@vger.kernel.org, richard@nod.at,
	alvinzhou@mxic.com.tw,  leoyu@mxic.com.tw,
	Cheng Ming Lin <chengminglin@mxic.com.tw>
Subject: Re: [PATCH 1/2] mtd: spi-nand: Add support for randomizer
Date: Fri, 8 Aug 2025 19:35:41 +0800	[thread overview]
Message-ID: <CAAyq3SYHchAXb6_jOsCs_R_iCboAQq6jBpbLmF4_7uGzME=+iQ@mail.gmail.com> (raw)
In-Reply-To: <878qjuazlp.fsf@bootlin.com>

Hi Miquel,

Miquel Raynal <miquel.raynal@bootlin.com> 於 2025年8月8日 週五 下午6:15寫道：
>
> Hi Cheng Ming,
>
> On 08/08/2025 at 17:55:02 +08, Cheng Ming Lin <linchengming884@gmail.com> wrote:
>
> > From: Cheng Ming Lin <chengminglin@mxic.com.tw>
> >
> > Add randomizer operation support for user data scrambling.
> >
> > For more high-reliability concern, if subpage write not available with
> > hardware ECC and then to enable randomizer is recommended by default.
>
> Could we adopt a helper that allows to enable and disable the
> randomizer?

I understand the idea, but from the flash’s perspective, once the
randomizer is enabled, it’s generally not intended to be disabled. So I
feel that providing a disable option might not be meaningful in this
case.

>
> I have no use case in mind right now, but I feel like it would be a
> better approach.
>
> Thanks,
> Miquèl

Thanks,
Cheng Ming Lin

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