Re: [PATCH 1/2] arm64: dts: socfpga: Enable the SMMU for SoCFPGA device trees

[Dinh Nguyen <dinguyen@kernel.org>]

On 5/14/26 06:41, muhammad.nazim.amirul.nazle.asmade@altera.com wrote:
> From: Nazim Amirul <muhammad.nazim.amirul.nazle.asmade@altera.com>
> 
> Enable the SMMU on the SoCFPGA board device trees where it was
> missing. The SoC uses a different memory-mapped base address for
> its peripherals, which requires the System Memory Management Unit
> (SMMU) to be active so that the Secure Device Manager (SDM) can
> correctly access those regions through address translation.
> 
> Signed-off-by: Nazim Amirul <muhammad.nazim.amirul.nazle.asmade@altera.com>
> ---
>   arch/arm64/boot/dts/intel/socfpga_agilex5_socdk.dts      | 4 ++++
>   arch/arm64/boot/dts/intel/socfpga_agilex5_socdk_nand.dts | 4 ++++
>   2 files changed, 8 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/intel/socfpga_agilex5_socdk.dts b/arch/arm64/boot/dts/intel/socfpga_agilex5_socdk.dts
> index dae0db9f8819..66fc3c546b66 100644
> --- a/arch/arm64/boot/dts/intel/socfpga_agilex5_socdk.dts
> +++ b/arch/arm64/boot/dts/intel/socfpga_agilex5_socdk.dts
> @@ -109,6 +109,10 @@ &usb0 {
>   	disable-over-current;
>   };
>   
> +&smmu {
> +	status = "okay";
> +};
> +

The SMMU is an SOC specific device, so it should be enabled in the base 
DTSI file.

Dinh