[PATCH 0/3] Add Loongson-2K0300 APB DMA mux support

[Binbin Zhou <zhoubinbin@loongson.cn>]

Hi all:

Loongson-2K0300 integrates a CMC DMA controller with 8 physical
channels. Peripheral DMA requests are not hard-wired to these channels;
they are routed through the CHIP_CTRL13/14/15 DMA_MAP fields.

This series adds support for that DMA request router.

Patch 1 adds the DT binding constants for the peripheral request IDs.
Patch 2 adds the DT binding documentation for the DMA mux.
Patch 3 adds the driver, Kconfig symbol and Makefile entry.

The driver registers with of_dma_router_register(). In the route
allocation callback it validates the <request> <channel> <flags>
specifier, programs the SoC-specific route register, and forwards
<channel> <flags> to the parent CMC DMA controller.

Thanks.
Binbin.

Binbin Zhou (3):
  dt-bindings: dma: loongson: Add Loongson-2 DMA mux request IDs
  dt-bindings: dma: loongson: Add Loongson-2K0300 DMA mux support
  dmaengine: loongson: Add Loongson-2K0300 APB DMA mux driver

 .../dma/loongson,ls2k0300-dmamux.yaml         |  49 +++
 MAINTAINERS                                   |   3 +
 drivers/dma/loongson/Kconfig                  |  13 +
 drivers/dma/loongson/Makefile                 |   1 +
 drivers/dma/loongson/loongson2-apb-dmamux.c   | 380 ++++++++++++++++++
 .../dt-bindings/dma/loongson,ls2k-dmamux.h    |  56 +++
 6 files changed, 502 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/dma/loongson,ls2k0300-dmamux.yaml
 create mode 100644 drivers/dma/loongson/loongson2-apb-dmamux.c
 create mode 100644 include/dt-bindings/dma/loongson,ls2k-dmamux.h


base-commit: 0a8dda0a15d3926422d286567f945a05328a4ac6
-- 
2.52.0