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From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Cheng Ming Lin <linchengming884@gmail.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 2/2] mtd: spi-nand: macronix: Add randomizer support
Date: Fri, 08 Aug 2025 12:19:24 +0200	[thread overview]
Message-ID: <87zfca9kur.fsf@bootlin.com> (raw)
In-Reply-To: <20250808095503.906244-3-linchengming884@gmail.com> (Cheng Ming Lin's message of "Fri, 8 Aug 2025 17:55:03 +0800")

On 08/08/2025 at 17:55:03 +08, Cheng Ming Lin <linchengming884@gmail.com> wrote:

> From: Cheng Ming Lin <chengminglin@mxic.com.tw>
>
> Enable randomizer function by specific flowchart to set the default value
> of RANDEN to 1.
>
> Randomizer introduces two new DT properties for child nodes to configure
> the randomizer functionality and coverage options.
>  - mxic,enable-randomizer-otp: Specify whether to activate the randomizer
>                                feature.
>  - mxic,randopt: Define the randomizer area per page.

Can we create a global NAND DT property for that? Enabling a randomizer
is quite a generic step.

> The penalty of randomizer are subpage accesses prohibited and more time
> period is needed in program operation and entering deep power-down mode.
> i.e., tPROG 320us to 360us (randomizer enabled).

Do you want to share what is the added value in terms of lifetime to
enable the randomizer, given the drawbacks which are significant?

Thanks,
Miquèl

______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

WARNING: multiple messages have this Message-ID (diff)
From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Cheng Ming Lin <linchengming884@gmail.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 2/2] mtd: spi-nand: macronix: Add randomizer support
Date: Fri, 08 Aug 2025 12:19:24 +0200	[thread overview]
Message-ID: <87zfca9kur.fsf@bootlin.com> (raw)
In-Reply-To: <20250808095503.906244-3-linchengming884@gmail.com> (Cheng Ming Lin's message of "Fri, 8 Aug 2025 17:55:03 +0800")

On 08/08/2025 at 17:55:03 +08, Cheng Ming Lin <linchengming884@gmail.com> wrote:

> From: Cheng Ming Lin <chengminglin@mxic.com.tw>
>
> Enable randomizer function by specific flowchart to set the default value
> of RANDEN to 1.
>
> Randomizer introduces two new DT properties for child nodes to configure
> the randomizer functionality and coverage options.
>  - mxic,enable-randomizer-otp: Specify whether to activate the randomizer
>                                feature.
>  - mxic,randopt: Define the randomizer area per page.

Can we create a global NAND DT property for that? Enabling a randomizer
is quite a generic step.

> The penalty of randomizer are subpage accesses prohibited and more time
> period is needed in program operation and entering deep power-down mode.
> i.e., tPROG 320us to 360us (randomizer enabled).

Do you want to share what is the added value in terms of lifetime to
enable the randomizer, given the drawbacks which are significant?

Thanks,
Miquèl

  reply	other threads:[~2025-08-08 10:46 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-08-08  9:55 [PATCH 0/2] Add support for randomizer Cheng Ming Lin
2025-08-08  9:55 ` Cheng Ming Lin
2025-08-08  9:55 ` [PATCH 1/2] mtd: spi-nand: " Cheng Ming Lin
2025-08-08  9:55   ` Cheng Ming Lin
2025-08-08 10:15   ` Miquel Raynal
2025-08-08 10:15     ` Miquel Raynal
2025-08-08 11:35     ` Cheng Ming Lin
2025-08-08 11:35       ` Cheng Ming Lin
2025-08-08  9:55 ` [PATCH 2/2] mtd: spi-nand: macronix: Add randomizer support Cheng Ming Lin
2025-08-08  9:55   ` Cheng Ming Lin
2025-08-08 10:19   ` Miquel Raynal [this message]
2025-08-08 10:19     ` Miquel Raynal
2025-08-08 11:49     ` Cheng Ming Lin
2025-08-08 11:49       ` Cheng Ming Lin
2025-08-11  3:01     ` Cheng Ming Lin
2025-08-11  3:01       ` Cheng Ming Lin
2025-08-18  8:47       ` Miquel Raynal
2025-08-18  8:47         ` Miquel Raynal
2025-09-05  1:14         ` Cheng Ming Lin
2025-09-05  1:14           ` Cheng Ming Lin
2025-09-05 14:08           ` Miquel Raynal
2025-09-05 14:08             ` Miquel Raynal

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