[PATCH 0/9] dma: Add BCM2711 and BCM2712 support to bcm2835-dma

[Peter Robinson]

The upstream bcm2835-dma driver only handles the older BCM2835 SoCs
up to the Raspberry Pi 3. The later BCM2711/BCM2712 add extra channels
that support 40-bit DMA4 channels so add support so this works upstream.

The first patch updates the bindings, them patches 2-5 do some
refactoring and add the support for the newer SoCs.

Finally patches 6 and 7 add the nodes to the base device tree and
patches 8 and 9 enable it and configure HDMI audio to use them as
per the down stream device trees.

The series was assisted considerably by Claude Opus 5.5 based on the
various downstream Raspberry Pi patches and tested on a number of
RPi5B revC/D, RPi4B and a RPi3B+ all running Fedora 45. Checkpatch
and dtbs_check pass clean.

Peter Robinson (9):
  dt-bindings: dma: brcm,bcm2835-dma: Add BCM2711 and BCM2712
  dmaengine: bcm2835: Refactor control block handling
  dmaengine: bcm2835: Support controllers split across several nodes
  dmaengine: bcm2835: Add BCM2711 40-bit channel support
  dmaengine: bcm2835: Add BCM2712 support
  ARM: dts: bcm2711: Add 40-bit DMA controller
  ARM: dts: bcm2711-rpi: Use 40-bit DMA for HDMI audio
  arm64: dts: broadcom: bcm2712: Add DMA controllers
  arm64: dts: broadcom: bcm2712-rpi-5-b: Enable HDMI audio

 .../bindings/dma/brcm,bcm2835-dma.yaml        |  31 +-
 arch/arm/boot/dts/broadcom/bcm2711-rpi.dtsi   |   8 +
 arch/arm/boot/dts/broadcom/bcm2711.dtsi       |  16 +
 .../boot/dts/broadcom/bcm2712-d-rpi-5-b.dts   |   8 +
 .../dts/broadcom/bcm2712-rpi-5-b-base.dtsi    |  10 +
 arch/arm64/boot/dts/broadcom/bcm2712.dtsi     |  40 ++
 drivers/dma/bcm2835-dma.c                     | 496 +++++++++++++++---
 7 files changed, 534 insertions(+), 75 deletions(-)

-- 
2.56.0