From: Thomas Petazzoni via buildroot <buildroot@buildroot.org>
To: Edgar Bonet <bonet@grenoble.cnrs.fr>
Cc: buildroot@buildroot.org, Biagio Montaruli <biagio.hkr@gmail.com>
Subject: Re: [Buildroot] [PATCH 1/1] board/acmesystems/acqua-a5: update device tree for newer kernels
Date: Tue, 29 Oct 2024 22:32:55 +0100 [thread overview]
Message-ID: <20241029223255.40274d67@windsurf> (raw)
In-Reply-To: <b5c97a2a-49da-40a8-b546-059ee0bee52e@grenoble.cnrs.fr>
On Mon, 23 Sep 2024 12:28:51 +0200
Edgar Bonet <bonet@grenoble.cnrs.fr> wrote:
> The Ethernet MAC address of the Acqua board is stored in an onboard
> EEPROM. Its location is described in the device tree as:
>
> eeprom@58 { // NVMEM node
> // EEPROM parameters...
>
> eth0_addr: eth-mac-addr@9A { // NVMEM cells
> reg = <0x0 0x06>;
> };
> };
>
> Since Linux 6.5, defining NVMEM cells this way, as direct children of
> the NVMEM node, is deprecated. It is instead recommended to wrap the
> cells inside a "fixed-layout" node.
>
> The older, deprecated syntax is still supported on Linux 6.6. Since
> Linux 6.7 (commit 2cc3b37f5b6d: "nvmem: add explicit config option to
> read old syntax fixed OF cells") however, it is only supported by
> selected NVMEM drivers. It is not supported by the at24 driver used to
> access the Acqua's onboard EEPROM.
>
> Update the device tree to the new, recommended, syntax. This makes it
> work with newer kernels, while preserving compatibility with the
> currently used 6.6.30.
>
> Signed-off-by: Edgar Bonet <bonet@grenoble.cnrs.fr>
> ---
> board/acmesystems/acqua-a5/at91-sama5d3_acqua.dts | 10 ++++++++--
> 1 file changed, 8 insertions(+), 2 deletions(-)
Applied to master, thanks.
Thomas
--
Thomas Petazzoni, CTO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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prev parent reply other threads:[~2024-10-29 21:33 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-23 10:28 [Buildroot] [PATCH 1/1] board/acmesystems/acqua-a5: update device tree for newer kernels Edgar Bonet
2024-10-29 21:32 ` Thomas Petazzoni via buildroot [this message]
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