linux-kernel - Re: [PATCH] Revert "mtd: spinand: esmt: fix id code for F50D1G41LB"

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Message-ID: <87wm2x74pz.fsf@bootlin.com>
Date: Mon, 08 Dec 2025 09:33:28 +0100
From: Miquel Raynal <miquel.raynal@...tlin.com>
To: Ziyang Huang <hzyitc@...look.com>
Cc: richard@....at,  vigneshr@...com,  tudor.ambarus@...aro.org,
  mmkurbanov@...utedevices.com,  george.moussalem@...look.com,
  linux-mtd@...ts.infradead.org,  linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Revert "mtd: spinand: esmt: fix id code for F50D1G41LB"

On 02/12/2025 at 23:05:56 +08, Ziyang Huang <hzyitc@...look.com> wrote:

> This reverts commit dd26402642a0899fde59ea6b0852fad3d799b4cc.
>
> The issue George met is due to the limit of QPIC, not the issue of the
> flash chip.
>
> QPIC only supports 4 bytes ID. So the fifth byte is always 0.
>
> If we use spi-gpio, the fifth byte can be read correctly.
>
> Signed-off-by: Ziyang Huang <hzyitc@...look.com>
> ---

So how do we solve that?

Is there anything than can be done on the qpic side?

Thanks,
Miquèl