[PATCH v2 0/2] dmaengine: ma35d1-pdma: Add MA35D1 PDMA driver

[Shan-Chun Hung]

This series adds the PDMA controller driver and DT binding for the
Nuvoton MA35D1 SoC.

The driver supports memory-to-memory, slave scatter-gather and cyclic
transfers.

Tested on the MA35D1 SOM board with Linux v7.4-rc1:
 - memory-to-memory with dmatest (2000 iterations of 1MB buffers, no failures)
 - slave scatter-gather with a local (not yet submitted) QSPI patch
 - cyclic slave with a local (not yet submitted) I2S patch

Changes in v2:
 - Address issues identified by Sashiko AI review:
   - Program registers on descriptor start instead of prep.
   - Fix interrupt completion handling and return IRQ_NONE when idle.
   - Set PDMA_TBINTDIS on intermediate memcpy chunks.
   - Validate scatter-gather lengths and bus width alignment.
   - Fix channel request assignment in of_xlate().
   - Safe controller teardown order in remove().
   - Drop peripheral timeout support to simplify driver.
 - binding: describe the hardware in the description, and drop
   dma-channels and the dt-bindings header.
 - Use a fixed number of 10 channels and trim the includes.

Signed-off-by: Shan-Chun Hung <shanchun1218@xxxxxxxxx>

Shan-Chun Hung (2):
  dt-bindings: dma: nuvoton,ma35d1-pdma: Document MA35D1 PDMA controller
  dmaengine: ma35d1-pdma: Add MA35D1 PDMA driver

 .../bindings/dma/nuvoton,ma35d1-pdma.yaml     |  71 ++
 drivers/dma/Kconfig                           |  12 +
 drivers/dma/Makefile                          |   1 +
 drivers/dma/ma35d1-pdma.c                     | 672 ++++++++++++++++++
 4 files changed, 756 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/dma/nuvoton,ma35d1-pdma.yaml
 create mode 100644 drivers/dma/ma35d1-pdma.c

-- 
2.25.1