[PATCH v4 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:
- Support for higher addresses (up to 32G).
- A different interrupt register layout and mapping.
- A different number of channels per interrupt register.

To support these differences without introducing complex conditional
logic throughout the driver, this series refactors the
`sun6i_dma_config` structure by adding hardware-specific parameters such
as interrupt register offsets, address masks, and channel counts per
register. This allows the driver to support the A733 and future hardware
revisions. This approach also achieves the same functionality as the DMA
drivers in Radxa BSP Package[1].

The series is organized as follows:
1. Refactor the configuration structure for interrupt and register operations.
2. Add support for variable address widths using masks.
3. Add support for variable channels per interrupt register.
4. Update the device tree bindings documentation.
5. Implement the A733-specific configuration and register mappings.

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>
---
Changes in v4:
- Refactor configuration structure to use irq stride and offsets instead
  of function pointers.
- Use GENMASK and field_prep in set_addr for different high addresses.
- Link to v3: https://patch.msgid.link/20260622-sun60i-a733-dma-v3-0-f697ef296cbc@xxxxxxxxx

Changes in v3:
- Reword patches for clarity.
- Link to v2: https://patch.msgid.link/20260621-sun60i-a733-dma-v2-0-340f205891cc@xxxxxxxxx

Changes in v2:
- Implement SUN6I_DMA_IRQ_A31_COMMON_OPS macro to avoid duplicate.
- Move set_addr into helper function and revert back sun6i_dma_set_addr.
- Rename chan_num to irq_req to avoid misleading name as suggested by
  sashiko.
- Reorder and reword the dtbinding patch for more clarity.
- Link to v1: https://patch.msgid.link/20260619-sun60i-a733-dma-v1-0-da4b649fc72a@xxxxxxxxx

To: Vinod Koul <vkoul@xxxxxxxxxx>
To: Frank Li <Frank.Li@xxxxxxxxxx>
To: Chen-Yu Tsai <wens@xxxxxxxxxx>
To: Jernej Skrabec <jernej.skrabec@xxxxxxxxx>
To: Samuel Holland <samuel@xxxxxxxxxxxx>
To: Rob Herring <robh@xxxxxxxxxx>
To: Krzysztof Kozlowski <krzk+dt@xxxxxxxxxx>
To: Conor Dooley <conor+dt@xxxxxxxxxx>
To: Maxime Ripard <mripard@xxxxxxxxxx>
Cc: dmaengine@xxxxxxxxxxxxxxx
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-sunxi@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: devicetree@xxxxxxxxxxxxxxx

---
Yuanshen Cao (5):
      dmaengine: sun6i-dma: Refactor to support A733 interrupt and register handling
      dmaengine: sun6i-dma: Support variable address widths using masks
      dmaengine: sun6i-dma: Add num_channels_per_reg for flexible interrupt mapping
      dt-bindings: dmaengine: sun50i-a64-dma: Add allwinner,sun60i-a733-dma compatible string
      dmaengine: sun6i-dma: Add support for Allwinner A733 DMA controller

 .../bindings/dma/allwinner,sun50i-a64-dma.yaml     |   2 +
 drivers/dma/sun6i-dma.c                            | 153 ++++++++++++++++-----
 2 files changed, 122 insertions(+), 33 deletions(-)
---
base-commit: 8d3ae59288f1e7d58d76558a6ee96d533bc5019f
change-id: 20260619-sun60i-a733-dma-c2455149165d

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