From 120218981e6e07b4d73ae3431d2f1b3f317ac5e4 Mon Sep 17 00:00:00 2001 From: Edgar Bonet Date: Mon, 23 Sep 2024 12:28:51 +0200 Subject: [PATCH] board/acmesystems/acqua-a5: update device tree for newer kernels 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 Signed-off-by: Thomas Petazzoni --- board/acmesystems/acqua-a5/at91-sama5d3_acqua.dts | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/board/acmesystems/acqua-a5/at91-sama5d3_acqua.dts b/board/acmesystems/acqua-a5/at91-sama5d3_acqua.dts index a7a4a20352..411d1942f5 100644 --- a/board/acmesystems/acqua-a5/at91-sama5d3_acqua.dts +++ b/board/acmesystems/acqua-a5/at91-sama5d3_acqua.dts @@ -149,8 +149,14 @@ #address-cells = <1>; #size-cells = <1>; - eth0_addr: eth-mac-addr@9A { - reg = <0x0 0x06>; + nvmem-layout { + compatible = "fixed-layout"; + #address-cells = <1>; + #size-cells = <1>; + + eth0_addr: eth-mac-addr@9A { + reg = <0x0 0x06>; + }; }; };