Re: [PATCH] mtd: spi-nor: winbond: add w25q01jv flash chip

From: Pratyush Yadav <pratyush@kernel.org>
To: Wilken Gottwalt <wilken.gottwalt@posteo.net>
Cc: gcc-patches@gcc.gnu.org,  linux-mtd@lists.infradead.org,
	 Tudor Ambarus <tudor.ambarus@linaro.org>,
	 Pratyush Yadav <pratyush@kernel.org>,
	Michael Walle <mwalle@kernel.org>,
	 Miquel Raynal <miquel.raynal@bootlin.com>,
	 Richard Weinberger <richard@nod.at>,
	Vignesh Raghavendra <vigneshr@ti.com>
Subject: Re: [PATCH] mtd: spi-nor: winbond: add w25q01jv flash chip
Date: Mon, 16 Dec 2024 13:03:53 +0000	[thread overview]
Message-ID: <mafs0y10f230m.fsf@kernel.org> (raw)
In-Reply-To: <Z2AOeyPwYWaam_lX@monster.localdomain> (Wilken Gottwalt's message of "Mon, 16 Dec 2024 11:26:51 +0000")

Hi Wilken,

On Mon, Dec 16 2024, Wilken Gottwalt wrote:

> Add Winbond W25Q01JV 128 MiB SPI NOR flash chip, verified working on the
> Zynq-7000 platform QSPI controller. The flash chip has quite high read
> speeds (about 60+ MiB/s), but erasing is very slow. The slow erasing is
> by design.

Does the flash have support SFDP? If so, you likely don't need specify
the no_sfdp_flags, name, or size. Try the entry only with ID and flags,
and see if the flash continues to work fine for you.

Also see [0] for additional testing requirements.

[0] https://docs.kernel.org/driver-api/mtd/spi-nor.html

>
> Signed-off-by: Wilken Gottwalt <wilken.gottwalt@posteo.net>
> ---
>  drivers/mtd/spi-nor/winbond.c | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/drivers/mtd/spi-nor/winbond.c b/drivers/mtd/spi-nor/winbond.c
> index 8d0a00d69e12..e2caf299d19a 100644
> --- a/drivers/mtd/spi-nor/winbond.c
> +++ b/drivers/mtd/spi-nor/winbond.c
> @@ -146,6 +146,12 @@ static const struct flash_info winbond_nor_parts[] = {
>  		.name = "w25q512jvq",
>  		.size = SZ_64M,
>  		.no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ,
> +	}, {
> +		.id = SNOR_ID(0xef, 0x40, 0x21),
> +		.name = "w25q01jv",
> +		.size = SZ_128M,
> +		.flags = SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB,
> +		.no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ,
>  	}, {
>  		.id = SNOR_ID(0xef, 0x50, 0x12),
>  		.name = "w25q20bw",

-- 
Regards,
Pratyush Yadav

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