[PATCH v3 0/3] Add DMA support for RZ/T2H RSPI
From: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@renesas.com>
Date: 2026-01-28 21:52:32
Also in:
linux-devicetree, linux-renesas-soc, lkml
The DMA controller can be used to transfer data to and from the SPI controller without involving the CPU for each word of a SPI transfer. Add support for DMA mode, and do some other cleanups while touching the same code. The dts changes in this series depend on the DMA series [1]. [1]: https://lore.kernel.org/lkml/20260105114445.878262-1-cosmin-gabriel.tanislav.xa@renesas.com/#t (local) V3: * impose proper maxItems for each device * impose maxItems for dmas property V2: * drop patches picked up by Mark * add new dt-bindings patch to allow multiple DMAs * wire up all DMA controllers for every SPI controller Cosmin Tanislav (3): dt-bindings: spi: renesas,rzv2h-rspi: allow multiple DMAs arm64: dts: renesas: r9a09g077: wire up DMA support for SPI arm64: dts: renesas: r9a09g087: wire up DMA support for SPI .../bindings/spi/renesas,rzv2h-rspi.yaml | 16 +++++++++++++--- arch/arm64/boot/dts/renesas/r9a09g077.dtsi | 16 ++++++++++++++++ arch/arm64/boot/dts/renesas/r9a09g087.dtsi | 16 ++++++++++++++++ 3 files changed, 45 insertions(+), 3 deletions(-) -- 2.52.0