[PATCH v3 0/3] Add DMA support for RZ/T2H RSPI

[Cosmin Tanislav]

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@xxxxxxxxxxx/#t

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