From: Nazim Amirul <muhammad.nazim.amirul.nazle.asmade@altera.com>

This series enables the SMMU and adds DMA coherency support for the
XGMAC nodes across the affected board device trees.

Patch 1 enables the SMMU for the SoCFPGA board device trees where it
was missing. The SoC uses a different memory-mapped base address for
its peripherals, which requires the SMMU to be active so that the
Secure Device Manager (SDM) can correctly access those regions through
address translation.

Patch 2 adds the dma-coherent property to the XGMAC nodes. The SMMU
is enabled and transactions going through it are cache coherent.
Adding dma-coherent prevents redundant cache flush/invalidate
operations and potential stale data issues.

Changes in v2:
- Move SMMU enable into the base DTSI file instead of individual DTS files
- Move dma-coherent property into the base DTSI file instead of individual DTS files
- Improve commit messages and cover letter descriptions with more context on why the changes are needed

Nazim Amirul (2):
  arm64: dts: socfpga: Enable the SMMU for SoCFPGA device trees
  arm64: dts: socfpga: Add dma-coherent to XGMAC nodes

 arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

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2.43.7