Re: [Buildroot] [PATCH 1/1] board/acmesystems/acqua-a5: update device tree for newer kernels

[Thomas Petazzoni via buildroot <buildroot@buildroot.org>]

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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