[PATCH v2 0/9] Add GPCDMA support in Tegra264

[Akhil R <akhilrajeev@nvidia.com>]

This series adds support for GPCDMA in Tegra264 with additional
support for separate stream ID for each channel. Tegra264 GPCDMA
controller has changes in the register offsets and uses 41-bit
addressing for memory. Add changes in the tegra186-gpc-dma driver
to support these.

v1->v2:
- Fix dt_bindings_check warnings
- Drop fallback compatible "nvidia,tegra186-gpcdma" from Tegra264 DT
- Use dma_addr_t for sg_req src/dst fields and drop separate high_add
  variable and check for the addr_bits only when programming the
  registers.
- Update address width to 39 bits for Tegra234 and before since the SMMU
  supports only up to 39 bits till Tegra234.
- Add a patch to do managed DMA controller registration.
- Describe the second iteration in the probe.
- Update commit descriptions.

Akhil R (9):
  dt-bindings: dma: nvidia,tegra186-gpc-dma: Add iommu-map property
  dt-bindings: dma: nvidia,tegra186-gpc-dma: Make reset optional
  dmaengine: tegra: Make reset control optional
  dmaengine: tegra: Use struct for register offsets
  dmaengine: tegra: Support address width > 39 bits
  dmaengine: tegra: Use managed DMA controller registration
  dmaengine: tegra: Use iommu-map for stream ID
  dmaengine: tegra: Add Tegra264 support
  arm64: tegra: Add iommu-map and enable GPCDMA in Tegra264

 .../bindings/dma/nvidia,tegra186-gpc-dma.yaml |  27 +-
 .../arm64/boot/dts/nvidia/tegra264-p3834.dtsi |   4 +
 arch/arm64/boot/dts/nvidia/tegra264.dtsi      |   3 +-
 drivers/dma/tegra186-gpc-dma.c                | 433 +++++++++++-------
 4 files changed, 298 insertions(+), 169 deletions(-)

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2.50.1