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From: "Michael Walle" <mwalle@kernel.org>
To: "Erez" <erezgeva2@gmail.com>
Cc: "Conor Dooley" <conor@kernel.org>,
	"Erez Geva" <erezgeva@nwtime.org>,
	<linux-mtd@lists.infradead.org>,
	"Tudor Ambarus" <tudor.ambarus@linaro.org>,
	"Pratyush Yadav" <pratyush@kernel.org>,
	<linux-kernel@vger.kernel.org>,
	"Miquel Raynal" <miquel.raynal@bootlin.com>,
	"Richard Weinberger" <richard@nod.at>,
	"Vignesh Raghavendra" <vigneshr@ti.com>,
	<devicetree@vger.kernel.org>, "Rob Herring" <robh@kernel.org>,
	"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
	"Conor Dooley" <conor+dt@kernel.org>
Subject: Re: [PATCH 3/4] dt-bindings: mtd: macronix,mx25l12833f: add SPI-NOR chip
Date: Fri, 28 Jun 2024 19:45:50 +0200	[thread overview]
Message-ID: <D2BU69BDUOL0.63A7T034CORP@kernel.org> (raw)
In-Reply-To: <CANeKEMO9hBhBs91nZkZRht9J29iRC2Tgf6ucWq=nbO7XAqzzng@mail.gmail.com>

> What is the kernel policy regarding obsolete flash chips?
> Macronix annonce on end of life of mx25l12805d in 2010.

Which doesn't mean there are no boards using it. But EOL in 2010
might be a strong argument to remove it. But I don't see the need
for it, yet.

> > Also please have a look at
> > https://docs.kernel.org/driver-api/mtd/spi-nor.html
>
> The new mx25l12833f supports SFDP, the obsolete mx25l12805d does not.
> I did manage to read the SFDP, though I do not have a copy of it (I do
> not have the hardware any more).

So how would you test newer versions of this series?

> To my best knowledge SFDP table do not contain information on OTP,

That's true, but we need it to detect flashes during runtime in the
future. Imagine sometime later, there's a third flash with this
exact ID, then we need to have the SFDP to figure out if there are
any differences between yours and the new one.

-michael

______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

WARNING: multiple messages have this Message-ID (diff)
From: "Michael Walle" <mwalle@kernel.org>
To: "Erez" <erezgeva2@gmail.com>
Cc: "Conor Dooley" <conor@kernel.org>,
	"Erez Geva" <erezgeva@nwtime.org>,
	<linux-mtd@lists.infradead.org>,
	"Tudor Ambarus" <tudor.ambarus@linaro.org>,
	"Pratyush Yadav" <pratyush@kernel.org>,
	<linux-kernel@vger.kernel.org>,
	"Miquel Raynal" <miquel.raynal@bootlin.com>,
	"Richard Weinberger" <richard@nod.at>,
	"Vignesh Raghavendra" <vigneshr@ti.com>,
	<devicetree@vger.kernel.org>, "Rob Herring" <robh@kernel.org>,
	"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
	"Conor Dooley" <conor+dt@kernel.org>
Subject: Re: [PATCH 3/4] dt-bindings: mtd: macronix,mx25l12833f: add SPI-NOR chip
Date: Fri, 28 Jun 2024 19:45:50 +0200	[thread overview]
Message-ID: <D2BU69BDUOL0.63A7T034CORP@kernel.org> (raw)
In-Reply-To: <CANeKEMO9hBhBs91nZkZRht9J29iRC2Tgf6ucWq=nbO7XAqzzng@mail.gmail.com>

> What is the kernel policy regarding obsolete flash chips?
> Macronix annonce on end of life of mx25l12805d in 2010.

Which doesn't mean there are no boards using it. But EOL in 2010
might be a strong argument to remove it. But I don't see the need
for it, yet.

> > Also please have a look at
> > https://docs.kernel.org/driver-api/mtd/spi-nor.html
>
> The new mx25l12833f supports SFDP, the obsolete mx25l12805d does not.
> I did manage to read the SFDP, though I do not have a copy of it (I do
> not have the hardware any more).

So how would you test newer versions of this series?

> To my best knowledge SFDP table do not contain information on OTP,

That's true, but we need it to detect flashes during runtime in the
future. Imagine sometime later, there's a third flash with this
exact ID, then we need to have the SFDP to figure out if there are
any differences between yours and the new one.

-michael

  reply	other threads:[~2024-06-28 17:46 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-06-28 14:03 [PATCH 0/4] Add support for SPI-NOR Macronix OTP Erez Geva
2024-06-28 14:03 ` Erez Geva
2024-06-28 14:03 ` [PATCH 1/4] Add generic functions for accessing the SPI-NOR chip Erez Geva
2024-06-28 14:03   ` Erez Geva
2024-06-28 14:39   ` Tudor Ambarus
2024-06-28 14:39     ` Tudor Ambarus
2024-06-28 14:03 ` [PATCH 2/4] Add support for SPI-NOR Macronix OTP Erez Geva
2024-06-28 14:03   ` Erez Geva
2024-06-28 14:03 ` [PATCH 3/4] dt-bindings: mtd: macronix,mx25l12833f: add SPI-NOR chip Erez Geva
2024-06-28 14:03   ` Erez Geva
2024-06-28 15:57   ` Conor Dooley
2024-06-28 15:57     ` Conor Dooley
2024-06-28 16:04     ` Michael Walle
2024-06-28 16:04       ` Michael Walle
     [not found]       ` <CANeKEMMrXK=mw=n=9DuTnprkTs3ct446oaC2QTJyst8Nd+D6rw@mail.gmail.com>
2024-06-28 16:44         ` Erez
2024-06-28 16:44           ` Erez
2024-06-28 16:51         ` Michael Walle
2024-06-28 16:51           ` Michael Walle
2024-06-28 17:17           ` Erez
2024-06-28 17:17             ` Erez
2024-06-28 17:45             ` Michael Walle [this message]
2024-06-28 17:45               ` Michael Walle
2024-06-28 19:31               ` Erez
2024-06-28 19:31                 ` Erez
2024-06-28 14:03 ` [PATCH 4/4] Add Macronix SPI-NOR mx25l12833f with OTP Erez Geva
2024-06-28 14:03   ` Erez Geva

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