[PATCH v2 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.
- Updates the device tree bindings documentation.
- Implements 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 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: Add set_addr function pointer for variable address widths
      dmaengine: sun6i-dma: Add num_channels_per_reg for flexible interrupt mapping
      dt-bindings: dma: sun50i-a64-dma: Add allwinner,sun60i-a733-dma compatible string
      dmaengine: sun6i-dma: Implement support for Allwinner A733 DMA controller

 .../bindings/dma/allwinner,sun50i-a64-dma.yaml     |   2 +
 drivers/dma/sun6i-dma.c                            | 197 +++++++++++++++++++--
 2 files changed, 181 insertions(+), 18 deletions(-)
---
base-commit: 8cd9520d35a6c38db6567e97dd93b1f11f185dc6
change-id: 20260619-sun60i-a733-dma-c2455149165d

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