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

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Date:   Tue, 31 Jan 2023 21:09:23 +0800
From:   Heyi Guo <guoheyi@...ux.alibaba.com>
To:     Michael Walle <michael@...le.cc>
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


On 2023/1/30 下午5:29, Michael Walle wrote:
> 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?

Yes, the spec says it supports SFDP :)


> In this case,
> could you please try the latest next (or -rc) kernel without
> this change?

Is v6.2-rc3 OK for the test? If so, surely I can do that.

Thanks for your comments :)

Heyi


> 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/