From: Pratyush Yadav <pratyush@kernel.org>
To: "Kang.Kerry 康宇良 TAO" <Kang.Kerry@inventec.com>
Cc: Pratyush Yadav <pratyush@kernel.org>,
"linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>
Subject: Re: mtd: spi-nor: Add Winbond w25q512jvdtr
Date: Mon, 15 Sep 2025 14:14:37 +0200 [thread overview]
Message-ID: <mafs0o6rbj4k2.fsf@kernel.org> (raw)
In-Reply-To: <31265f84726047ebb49b3ea2e7836830@inventec.com>
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
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next prev parent reply other threads:[~2025-09-15 12:14 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-10 0:20 mtd: spi-nor: Add Winbond w25q512jvdtr Kang.Kerry 康宇良 TAO
2025-09-10 15:47 ` Pratyush Yadav
2025-09-15 9:29 ` Kang.Kerry 康宇良 TAO
2025-09-15 12:14 ` Pratyush Yadav [this message]
2025-09-16 8:14 ` Kang.Kerry 康宇良 TAO
2025-09-16 10:13 ` Pratyush Yadav
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