linux-kernel - Re: [PATCH v2 1/3] mtd: spi-nor: macronix: Drop the redundant flash info fields

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Message-ID: <d98f6eee-d5f7-43b7-bbc8-d6e7e274723a@roeck-us.net>
Date: Sat, 7 Jun 2025 18:04:28 -0700
From: Guenter Roeck <linux@...ck-us.net>
To: Cheng Ming Lin <linchengming884@...il.com>
Cc: tudor.ambarus@...aro.org, pratyush@...nel.org, mwalle@...nel.org,
	miquel.raynal@...tlin.com, richard@....at, vigneshr@...com,
	linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
	alvinzhou@...c.com.tw, leoyu@...c.com.tw,
	Cheng Ming Lin <chengminglin@...c.com.tw>
Subject: Re: [PATCH v2 1/3] mtd: spi-nor: macronix: Drop the redundant flash
 info fields

Hi,

On Mon, Apr 07, 2025 at 03:53:58PM +0800, Cheng Ming Lin wrote:
> From: Cheng Ming Lin <chengminglin@...c.com.tw>
> 
> Many flash devices share the same ID but have different part numbers.
> To avoid confusion, the part number field is removed.
> 
> Additionally, since SFDP already provides size information and
> functionality covered by no_sfdp_flags, these fields are also removed.
> 
> Furthermore, when 4-byte address instruction table is available,
> the SPI_NOR_4B_OPCODES flag is no longer needed and is removed.
> 
> Signed-off-by: Cheng Ming Lin <chengminglin@...c.com.tw>
> Acked-by: Tudor Ambarus <tudor.ambarus@...aro.org>

With this patch in place, some of my qemu tests no longer recognize the
flash chips (MX25L25635E/F). Do you have a suggestion on how to handle
this other than avoiding Macronix flash chips when working with qemu ?

Thanks,
Guenter