Describe the QSPI flash SFDP as an NVMEM provider with the microchip,sst26vf-sfdp-eui layout, which exposes the factory-programmed EUI-48 as a "mac-address" cell, and point macb0 at it through nvmem-cells. This yields a stable MAC address on boards where U-Boot does not program one, instead of falling back to a random address. Signed-off-by: Manikandan Muralidharan --- arch/arm/boot/dts/microchip/at91-sama5d27_wlsom1.dtsi | 11 +++++++++++ .../boot/dts/microchip/at91-sama5d27_wlsom1_ek.dts | 2 ++ 2 files changed, 13 insertions(+) diff --git a/arch/arm/boot/dts/microchip/at91-sama5d27_wlsom1.dtsi b/arch/arm/boot/dts/microchip/at91-sama5d27_wlsom1.dtsi index 062aa02a98ed..6016d7f2a39c 100644 --- a/arch/arm/boot/dts/microchip/at91-sama5d27_wlsom1.dtsi +++ b/arch/arm/boot/dts/microchip/at91-sama5d27_wlsom1.dtsi @@ -240,6 +240,17 @@ qspi1_flash: flash@0 { m25p,fast-read; status = "disabled"; + sfdp { + compatible = "jedec,sfdp"; + + nvmem-layout { + compatible = "microchip,sst26vf-sfdp-eui"; + + mac_address_eui48: mac-address { + }; + }; + }; + partitions { compatible = "fixed-partitions"; #address-cells = <1>; diff --git a/arch/arm/boot/dts/microchip/at91-sama5d27_wlsom1_ek.dts b/arch/arm/boot/dts/microchip/at91-sama5d27_wlsom1_ek.dts index 35a933eec573..5e87bf04bc47 100644 --- a/arch/arm/boot/dts/microchip/at91-sama5d27_wlsom1_ek.dts +++ b/arch/arm/boot/dts/microchip/at91-sama5d27_wlsom1_ek.dts @@ -97,6 +97,8 @@ uart6: serial@200 { &macb0 { status = "okay"; + nvmem-cells = <&mac_address_eui48>; + nvmem-cell-names = "mac-address"; }; &pioA { -- 2.43.0