linux-kernel - Re: [PATCH] drivers/spi-nor: add support for Winbond w25q01jv

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Message-ID: <c7c3c4cf5dd477953e366053859df08f@walle.cc>
Date:   Mon, 30 Jan 2023 10:29:44 +0100
From:   Michael Walle <michael@...le.cc>
To:     Heyi Guo <guoheyi@...ux.alibaba.com>
Cc:     linux-kernel@...r.kernel.org,
        Tudor Ambarus <tudor.ambarus@...rochip.com>,
        Pratyush Yadav <pratyush@...nel.org>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-mtd@...ts.infradead.org
Subject: Re: [PATCH] drivers/spi-nor: add support for Winbond w25q01jv

Hi,

> Winbond W25Q01JV is a 128MB SPI-NOR flash chip.
> 
> Signed-off-by: Heyi Guo <guoheyi@...ux.alibaba.com>
> 
> --
> Cc: Tudor Ambarus <tudor.ambarus@...rochip.com>
> Cc: Pratyush Yadav <pratyush@...nel.org>
> Cc: Michael Walle <michael@...le.cc>
> Cc: Miquel Raynal <miquel.raynal@...tlin.com>
> Cc: Richard Weinberger <richard@....at>
> Cc: Vignesh Raghavendra <vigneshr@...com>
> Cc: linux-mtd@...ts.infradead.org
> ---
>  drivers/mtd/spi-nor/winbond.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/mtd/spi-nor/winbond.c 
> b/drivers/mtd/spi-nor/winbond.c
> index ca39acf4112c8..0cd49f534bf8d 100644
> --- a/drivers/mtd/spi-nor/winbond.c
> +++ b/drivers/mtd/spi-nor/winbond.c
> @@ -142,6 +142,9 @@ static const struct flash_info winbond_nor_parts[] 
> = {
>  	{ "w25q512jvq", INFO(0xef4020, 0, 64 * 1024, 1024)
>  		NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ |
>  			      SPI_NOR_QUAD_READ) },
> +	{ "w25q01jv", INFO(0xef4021, 0, 64 * 1024, 2048)
> +		NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ |
> +			      SPI_NOR_QUAD_READ) },

I'd guess this flash has SFDP support, correct? In this case,
could you please try the latest next (or -rc) kernel without
this change? In the meantime we have a generic spi-nor driver [1]
so you don't need a new entry in most cases.

Apart from that, it would be nice if you could dump the
SFDP tables, see [2].

-michael

[1] 
https://elixir.bootlin.com/linux/v6.2-rc5/source/drivers/mtd/spi-nor/core.c#L1638
[2] https://lore.kernel.org/r/4304e19f3399a0a6e856119d01ccabe0@walle.cc/