linux-kernel - Re: [PATCH] mtd: spi-nor: issi: Add support for is25wx01g

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Message-ID: <mafs0cy8aw0yf.fsf@kernel.org>
Date: Mon, 01 Sep 2025 19:13:12 +0200
From: Pratyush Yadav <pratyush@...nel.org>
To: Flaviu Nistor <flaviu.nistor@...il.com>
Cc: Tudor Ambarus <tudor.ambarus@...aro.org>,  Pratyush Yadav
 <pratyush@...nel.org>,  Michael Walle <mwalle@...nel.org>,  Miquel Raynal
 <miquel.raynal@...tlin.com>,  Richard Weinberger <richard@....at>,
  Vignesh Raghavendra <vigneshr@...com>,  linux-mtd@...ts.infradead.org,
  linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mtd: spi-nor: issi: Add support for is25wx01g

Hi Flaviu,

On Mon, Sep 01 2025, Flaviu Nistor wrote:

> Add support for the IS25WX01G 128MB (1Gb) ISSI Serial Flash Memory.
>
> Signed-off-by: Flaviu Nistor <flaviu.nistor@...il.com>
> ---
>  drivers/mtd/spi-nor/issi.c | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/drivers/mtd/spi-nor/issi.c b/drivers/mtd/spi-nor/issi.c
> index 18d9a00aa22e..e4997f9bd557 100644
> --- a/drivers/mtd/spi-nor/issi.c
> +++ b/drivers/mtd/spi-nor/issi.c
> @@ -126,6 +126,9 @@ static const struct flash_info issi_nor_parts[] = {
>  		.flags = SPI_NOR_QUAD_PP,
>  		.fixups = &is25lp256_fixups,
>  		.fixup_flags = SPI_NOR_4B_OPCODES,
> +	}, {
> +		/* IS25WX01G */
> +		.id = SNOR_ID(0x9d, 0x5b, 0x1b),

It seems the flash needs no special configuration. IIUC it can be driven
entirely based on SFDP data. In that case, I don't think there is a need
for an entry at all. The generic SFDP-based driver should already be
enough for your flash. Just add a "jedec,spi-nor" node to your DT and it
should work.

>  	}
>  };

-- 
Regards,
Pratyush Yadav