linux-kernel - Re: [PATCH v3] mtd: spi-nor: micron-st: add SNOR_CMD_PP_8_8_8

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Message-Id: <DGACHCLD50YM.14CAK78PEJ6O3@kernel.org>
Date: Mon, 09 Feb 2026 11:04:57 +0100
From: "Michael Walle" <mwalle@...nel.org>
To: "Haibo Chen" <haibo.chen@....com>, "Tudor Ambarus"
 <tudor.ambarus@...aro.org>, "Pratyush Yadav" <pratyush@...nel.org>, "Miquel
 Raynal" <miquel.raynal@...tlin.com>, "Richard Weinberger" <richard@....at>,
 "Vignesh Raghavendra" <vigneshr@...com>
Cc: <linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
 <imx@...ts.linux.dev>, <han.xu@....com>
Subject: Re: [PATCH v3] mtd: spi-nor: micron-st: add SNOR_CMD_PP_8_8_8_DTR
 sfdp fixup for mt35xu512aba

On Tue Dec 23, 2025 at 4:01 AM CET, Haibo Chen wrote:
> Find two batches mt35xu512aba has different SFDP but with same
> jedec ID. The batch which use the new version of SFDP contain
> all the necessary information to support OCT DTR mode. The batch
> with old version do not contain the OCT DTR command information,
> but in fact it did support OCT DTR mode.
>
> Current mt35xu512aba_post_sfdp_fixup() add some setting including
> SNOR_CMD_READ_8_8_8_DTR, but still lack SNOR_CMD_PP_8_8_8_DTR. Meet
> issue on the batch mt35xu512aba with old SFDP version. Because no
> SNOR_CMD_PP_8_8_8_DTR, micron_st_nor_octal_dtr_en() will not be
> called, then use SNOR_CMD_READ_8_8_8_DTR will meet issue.
>
> Fixes: 44dd635cd632 ("mtd: spi-nor: micron-st: use SFDP of mt35xu512aba")
> Reviewed-by: Pratyush Yadav <pratyush@...nel.org>
> Signed-off-by: Haibo Chen <haibo.chen@....com>

Reviewed-by: Michael Walle <mwalle@...nel.org>

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