From: Miquel Raynal <miquel.raynal@bootlin.com>
To: "Michael Walle" <mwalle@kernel.org>
Cc: "Pratyush Yadav" <pratyush@kernel.org>,
"Takahiro Kuwano" <takahiro.kuwano@infineon.com>,
"Richard Weinberger" <richard@nod.at>,
"Vignesh Raghavendra" <vigneshr@ti.com>,
"Thomas Petazzoni" <thomas.petazzoni@bootlin.com>,
"Steam Lin" <STLin2@winbond.com>,
<linux-mtd@lists.infradead.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 11/30] mtd: spi-nor: winbond: W25Q32JV-Q/N: Fill locking information
Date: Wed, 22 Jul 2026 17:00:08 +0200 [thread overview]
Message-ID: <87ldb3hxxj.fsf@bootlin.com> (raw)
In-Reply-To: <DJRK05XL4ONU.MM3VQ61CQJ6I@kernel.org> (Michael Walle's message of "Mon, 06 Jul 2026 16:21:54 +0200")
> The original W25Q32 doesn't have the CMP bit.
I didn't found any datasheet without the CMP bit, but now that I know
these chips had a new batch (with mandatory SFDP support) starting from
2016, whereas the datasheets I looked at were from 2017, it is possible
that I couldn't find an old enough one.
Which brings me to a more important question: can we anyway enable CMP
anyway? I contributed several patches for that already (merged). I guess
if the CMP bit is not present, the old software does not use it. If it
tries to use it, normally the verification should fail.
Thanks,
Miquèl
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http://lists.infradead.org/mailman/listinfo/linux-mtd/
WARNING: multiple messages have this Message-ID (diff)
From: Miquel Raynal <miquel.raynal@bootlin.com>
To: "Michael Walle" <mwalle@kernel.org>
Cc: "Pratyush Yadav" <pratyush@kernel.org>,
"Takahiro Kuwano" <takahiro.kuwano@infineon.com>,
"Richard Weinberger" <richard@nod.at>,
"Vignesh Raghavendra" <vigneshr@ti.com>,
"Thomas Petazzoni" <thomas.petazzoni@bootlin.com>,
"Steam Lin" <STLin2@winbond.com>,
<linux-mtd@lists.infradead.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 11/30] mtd: spi-nor: winbond: W25Q32JV-Q/N: Fill locking information
Date: Wed, 22 Jul 2026 17:00:08 +0200 [thread overview]
Message-ID: <87ldb3hxxj.fsf@bootlin.com> (raw)
In-Reply-To: <DJRK05XL4ONU.MM3VQ61CQJ6I@kernel.org> (Michael Walle's message of "Mon, 06 Jul 2026 16:21:54 +0200")
> The original W25Q32 doesn't have the CMP bit.
I didn't found any datasheet without the CMP bit, but now that I know
these chips had a new batch (with mandatory SFDP support) starting from
2016, whereas the datasheets I looked at were from 2017, it is possible
that I couldn't find an old enough one.
Which brings me to a more important question: can we anyway enable CMP
anyway? I contributed several patches for that already (merged). I guess
if the CMP bit is not present, the old software does not use it. If it
tries to use it, normally the verification should fail.
Thanks,
Miquèl
next prev parent reply other threads:[~2026-07-22 15:00 UTC|newest]
Thread overview: 102+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-29 15:22 [PATCH 00/30] mtd: spi-nor: Clean Winbond W25QxxJV family Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-05-29 15:22 ` [PATCH 01/30] mtd: spi-nor: winbond: Move W25Q01NW to its right place Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-07-06 13:54 ` Michael Walle
2026-07-06 13:54 ` Michael Walle
2026-05-29 15:22 ` [PATCH 02/30] mtd: spi-nor: winbond: Normalize names Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-07-06 13:57 ` Michael Walle
2026-07-06 13:57 ` Michael Walle
2026-07-22 12:52 ` Miquel Raynal
2026-07-22 12:52 ` Miquel Raynal
2026-07-22 13:07 ` Michael Walle
2026-07-22 13:07 ` Michael Walle
2026-07-22 15:19 ` Miquel Raynal
2026-07-22 15:19 ` Miquel Raynal
2026-05-29 15:22 ` [PATCH 03/30] mtd: spi-nor: winbond: Stop filling the .name entry Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-07-06 13:59 ` Michael Walle
2026-07-06 13:59 ` Michael Walle
2026-07-22 12:56 ` Miquel Raynal
2026-07-22 12:56 ` Miquel Raynal
2026-07-22 13:23 ` Michael Walle
2026-07-22 13:23 ` Michael Walle
2026-07-22 15:51 ` Miquel Raynal
2026-07-22 15:51 ` Miquel Raynal
2026-05-29 15:22 ` [PATCH 04/30] mtd: spi-nor: winbond: Make the RDCR fixup Winbond wide Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-07-06 14:11 ` Michael Walle
2026-07-06 14:11 ` Michael Walle
2026-05-29 15:22 ` [PATCH 05/30] mtd: spi-nor: winbond: W25Q32JV-Q/N: Drop redundant data Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-07-06 14:13 ` Michael Walle
2026-07-06 14:13 ` Michael Walle
2026-07-22 13:00 ` Miquel Raynal
2026-07-22 13:00 ` Miquel Raynal
2026-05-29 15:22 ` [PATCH 06/30] mtd: spi-nor: winbond: W25Q64JV-Q/N: " Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-05-29 15:22 ` [PATCH 07/30] mtd: spi-nor: winbond: W25Q512JV-Q/N: " Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-05-29 15:22 ` [PATCH 08/30] mtd: spi-nor: winbond: W25Q32JV-Q/N: Add quad page program capability Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-07-06 14:16 ` Michael Walle
2026-07-06 14:16 ` Michael Walle
2026-07-22 13:01 ` Miquel Raynal
2026-07-22 13:01 ` Miquel Raynal
2026-05-29 15:22 ` [PATCH 09/30] mtd: spi-nor: winbond: W25Q64JV-Q/N: " Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-05-29 15:22 ` [PATCH 10/30] mtd: spi-nor: winbond: W25Q128JV-Q/N: " Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-05-29 15:22 ` [PATCH 11/30] mtd: spi-nor: winbond: W25Q32JV-Q/N: Fill locking information Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-07-06 14:21 ` Michael Walle
2026-07-06 14:21 ` Michael Walle
2026-07-22 15:00 ` Miquel Raynal [this message]
2026-07-22 15:00 ` Miquel Raynal
2026-05-29 15:22 ` [PATCH 12/30] mtd: spi-nor: winbond: W25Q64JV-Q/N: " Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-05-29 15:22 ` [PATCH 13/30] mtd: spi-nor: winbond: W25Q128JV-Q/N: " Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-05-29 15:22 ` [PATCH 14/30] mtd: spi-nor: winbond: W25Q512JV-Q/N: " Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-05-29 15:22 ` [PATCH 15/30] mtd: spi-nor: winbond: W25Q01JV-Q/N: " Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-05-29 15:22 ` [PATCH 16/30] mtd: spi-nor: winbond: W25Q32JV-M: Drop redundant data Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-07-06 14:23 ` Michael Walle
2026-07-06 14:23 ` Michael Walle
2026-07-22 15:09 ` Miquel Raynal
2026-07-22 15:09 ` Miquel Raynal
2026-05-29 15:22 ` [PATCH 17/30] mtd: spi-nor: winbond: W25Q64JV-M: " Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-05-29 15:22 ` [PATCH 18/30] mtd: spi-nor: winbond: W25Q128JV-M: " Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-05-29 15:22 ` [PATCH 19/30] mtd: spi-nor: winbond: W25Q32JV-M: Add quad page program capability Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-05-29 15:22 ` [PATCH 20/30] mtd: spi-nor: winbond: W25Q64JV-M: " Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-05-29 15:22 ` [PATCH 21/30] mtd: spi-nor: winbond: W25Q128JV-M: " Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-05-29 15:22 ` [PATCH 22/30] mtd: spi-nor: winbond: W25Q32JV-M: Fill locking information Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-05-29 15:22 ` [PATCH 23/30] mtd: spi-nor: winbond: W25Q64JV-M: " Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-05-29 15:22 ` [PATCH 24/30] mtd: spi-nor: winbond: W25Q128JV-M: " Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-05-29 15:22 ` [PATCH 25/30] mtd: spi-nor: winbond: W25Q02JV-M: " Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-05-29 15:22 ` [PATCH 26/30] mtd: spi-nor: winbond: W25Q512JV-M: New chip Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-05-29 15:22 ` [PATCH 27/30] mtd: spi-nor: winbond: W25Q01JV-M: " Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-05-29 15:22 ` [PATCH 28/30] mtd: spi-nor: winbond: W25QxxJV-Q/N/M: Drop redundant data Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-05-29 15:22 ` [PATCH 29/30] mtd: spi-nor: winbond: W25QxxJV-Q/N/M: Add quad page program capability Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-05-29 15:22 ` [PATCH 30/30] mtd: spi-nor: winbond: W25QxxJV-Q/N/M: Fill locking information Miquel Raynal
2026-05-29 15:22 ` Miquel Raynal
2026-07-06 14:27 ` [PATCH 00/30] mtd: spi-nor: Clean Winbond W25QxxJV family Michael Walle
2026-07-06 14:27 ` Michael Walle
2026-07-22 12:45 ` Miquel Raynal
2026-07-22 12:45 ` Miquel Raynal
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