From: <Takahiro.Kuwano@infineon.com>
To: <manikandan.m@microchip.com>, <pratyush@kernel.org>,
<mwalle@kernel.org>, <miquel.raynal@bootlin.com>,
<richard@nod.at>, <vigneshr@ti.com>, <robh@kernel.org>,
<krzk+dt@kernel.org>, <conor+dt@kernel.org>, <srini@kernel.org>,
<nicolas.ferre@microchip.com>, <alexandre.belloni@bootlin.com>,
<claudiu.beznea@tuxon.dev>, <linux@armlinux.org.uk>,
<richardcochran@gmail.com>, <linusw@kernel.org>, <arnd@arndb.de>,
<michael@walle.cc>, <linux-mtd@lists.infradead.org>,
<devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>, <netdev@vger.kernel.org>
Subject: RE: [PATCH v4 3/7] mtd: spi-nor: sfdp: expose the SFDP as a read-only NVMEM device
Date: Fri, 3 Jul 2026 09:21:33 +0000 [thread overview]
Message-ID: <d0823b0801bc4339a2653e4a51c488f4@infineon.com> (raw)
In-Reply-To: <8f3b422e0b7749b2a47b14a585dd0a0c@infineon.com>
> Hi,
>
> > Register the cached SFDP as a read-only NVMEM device rooted at the
> > flash's "sfdp" child node, exposing it in on-flash byte order. This lets
> > NVMEM cells reference any SFDP data: a fixed-layout for parameters at a
> > known offset, or an nvmem-layout parser for vendor data whose location
> > must be discovered at runtime. The device is only registered when an
> > "sfdp" node is present in the device tree.
> >
> > Signed-off-by: Manikandan Muralidharan <manikandan.m@microchip.com>
>
> SFDP is exposed in sysfs (e.g., /sys/bus/spi/devices/spi0.0/spi-nor/sfdp).
> Why don't you just use this existing entry?
Sorry, sysfs is for userspace.
Please just disregard my previous comment.
Thanks,
Takahiro
next prev parent reply other threads:[~2026-07-03 9:21 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-30 9:23 [PATCH v4 0/7] Read MAC address from SST vendor specific SFDP region Manikandan Muralidharan
2026-06-30 9:24 ` [PATCH v4 1/7] dt-bindings: mtd: jedec,spi-nor: allow the SFDP to be exposed via NVMEM Manikandan Muralidharan
2026-06-30 22:12 ` Linus Walleij
2026-07-01 8:34 ` Michael Walle
2026-07-01 10:53 ` Linus Walleij
2026-07-02 6:13 ` Manikandan.M
2026-07-02 6:16 ` Krzysztof Kozlowski
2026-07-02 6:55 ` Manikandan.M
2026-07-02 16:37 ` Rob Herring
2026-07-03 10:10 ` Miquel Raynal
2026-06-30 9:24 ` [PATCH v4 2/7] dt-bindings: nvmem: layouts: add Microchip/SST SFDP EUI layout Manikandan Muralidharan
2026-06-30 9:24 ` [PATCH v4 3/7] mtd: spi-nor: sfdp: expose the SFDP as a read-only NVMEM device Manikandan Muralidharan
2026-06-30 22:25 ` Linus Walleij
2026-07-03 5:35 ` Takahiro.Kuwano
2026-07-03 9:21 ` Takahiro.Kuwano [this message]
2026-06-30 9:24 ` [PATCH v4 4/7] nvmem: layouts: add Microchip/SST SFDP EUI layout driver Manikandan Muralidharan
2026-06-30 9:24 ` [PATCH v4 5/7] ARM: dts: microchip: sama5d27_wlsom1: use fixed-partitions for QSPI flash Manikandan Muralidharan
2026-06-30 22:27 ` Linus Walleij
2026-06-30 9:24 ` [PATCH v4 6/7] ARM: dts: microchip: sama5d27_wlsom1: read MAC address from QSPI SFDP Manikandan Muralidharan
2026-06-30 9:24 ` [PATCH v4 7/7] ARM: configs: sama5: enable Microchip/SST SFDP EUI NVMEM layout Manikandan Muralidharan
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