mtd: spi-nor: Add Winbond w25q512jvdtr

[Pratyush Yadav]

Hi,

On Mon, Sep 15 2025, Kang.Kerry 康宇良 TAO wrote:

Please don't top-post. https://www.idallen.com/topposting.html

> Hi Pratyush,
> I configured the DTS with 'compatible = "jedec,spi-nor";'
> and enabled the kernel options:
> CONFIG_MTD_PARTITIONED_MASTER=y
> CONFIG_MTD_SPI_NOR=y
>
> However, the dmesg output shows that the kernel is failing to recognize the flash's JEDEC ID. This suggests that the generic SFDP-based driver isn't working as expected.
>
> [  135.294624] spi-nor spi1.0: unrecognized JEDEC id bytes: ef 70 20 00 00 00
> [  135.301602] spi-nor: probe of spi1.0 failed with error -2
>
> I think we need to add this to table to make sure W25Q512JV-DTR is recognized.

This means spi_nor_check_sfdp_signature() fails. Can you check why? The
flash datasheet says it has a SFDP table so this should work.

BTW, which kernel version are you testing this on?

[...]

-- 
Regards,
Pratyush Yadav