[PATCH 0/5] dmaengine: sun6i-dma: Add support for Allwinner A733 DMA controller

[Yuanshen Cao]

Hi everyone,

This patch series introduces support for the Allwinner A733 DMA
controller in the `sun6i-dma` driver.

The A733 DMA controller differs from previous generations in several key
ways:
1. It supports higher address (up to 32G).
2. It uses a different interrupt register layout and mapping.
3. It has a different number of channels per interrupt register.

To support these differences without introducing complex conditional
logic throughout the driver, this series first refactors the
`sun6i_dma_config` structure. By moving interrupt handling, register
dumping, and address configuration into function pointers within the
configuration structure. This allows the driver to support the A733 
and future hardware revisions. It also aligns with the DMA drivers in
Radxa BSP Package[1].

The series is organized as follows:
- Refactors the configuration structure to include function pointers for
  interrupt and register operations.
- Moves address setting logic into the configuration structure to handle
  varying address widths.
- Adds support for variable channels per interrupt register.
- Implements the A733-specific configuration and register mappings.
- Updates the device tree bindings documentation.

Tested on Radxa Cubie A7Z.

[1] https://github.com/radxa/allwinner-bsp/blob/cubie-aiot-v1.4.8/drivers/dma/sunxi-dma.c

Thanks!

Signed-off-by: Yuanshen Cao <alex.caoys@xxxxxxxxx>
---
Yuanshen Cao (5):
      dmaengine: sun6i-dma: Refactor to support A733 interrupt and register handling
      dmaengine: sun6i-dma: Add set_addr function pointer for variable address widths
      dmaengine: sun6i-dma: Add num_channels_per_reg for flexible interrupt mapping
      dmaengine: sun6i-dma: Implement support for Allwinner A733 DMA controller
      dt-bindings: dma: sun50i-a64-dma: Update device tree bindings documentation for A733

 .../bindings/dma/allwinner,sun50i-a64-dma.yaml     |   2 +
 drivers/dma/sun6i-dma.c                            | 223 +++++++++++++++++++--
 2 files changed, 203 insertions(+), 22 deletions(-)
---
base-commit: 8cd9520d35a6c38db6567e97dd93b1f11f185dc6
change-id: 20260619-sun60i-a733-dma-c2455149165d

Best regards,
--  
Yuanshen Cao <alex.caoys@xxxxxxxxx>