The sun50i-a64.dtsi changes introduced in Linux v4.19-rc1 changed the compatible name for the syscon controller, dropping the generic "syscon" fallback. Using this new DT node will make the Ethernet driver in every older kernel (or non-Linux kernels) fail to initialise the MAC device.
To allow booting distribution kernels (from installer images via UEFI, for instance), re-add the syscon compatible string as a fallback. This works with both older and newer kernels.
Signed-off-by: Andre Przywara andre.przywara@arm.com --- arch/arm/dts/sun50i-a64.dtsi | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/arm/dts/sun50i-a64.dtsi b/arch/arm/dts/sun50i-a64.dtsi index f3a66f8882..ff41abc96a 100644 --- a/arch/arm/dts/sun50i-a64.dtsi +++ b/arch/arm/dts/sun50i-a64.dtsi @@ -259,7 +259,8 @@ };
syscon: syscon@1c00000 { - compatible = "allwinner,sun50i-a64-system-control"; + compatible = "allwinner,sun50i-a64-system-control", + "syscon"; reg = <0x01c00000 0x1000>; #address-cells = <1>; #size-cells = <1>;