[PATCH v5 0/3] new Atmel DMA controller

[Ludovic Desroches]

Hi,

This set of patches introduces support for the new Atmel DMA controller know as
XDMAC and available on SAMA5D4.

Driver updated according to Arnd and Nicolas comments.

Changes from:
- v4
  - compile the driver if COMPILE_TEST is selected
  - merge header file into at_xdmac.c
  - use write memory barriers before starting the channel
  - init active_xfer to false when taking a descriptor from the free
  descriptors list
  - remove dma capabilities mask
  - use CONFIG_PM instead of CONFIG_PM_SLEEP for prepare function
  - style fixes
  - update documentation to add the <chip> compatible description
  - add maintener entry
- v3
  - use dma_get_any_slave_channel instead of dma_request_channel
  - fix tx_status behavior for non active transfers
  - rename at_xdmac_terminate_xfer
  - replace suspend/resume no irq variants by late/early variants
  - no more use dev res to request the irq, use the legacy way
  - add slave capabilities
- v2
  - documentation updated
  - fix locking issues
- v1
  - add power management stuff
  - check maxburst value
  - revert subsys_initcall remove, EPROBE_DEFER not yet available on the kernel
  version I use to do the tests, moreover other devices are not ready to use it
- RFC:
  - DMA_SUCCESS replaced by DMA_COMPLETE
  - fix memcpy issue caused by a mistake in interfaces used
  - add filter function
  - remove some parameters from device tree since we can get them through the
  dma slave configuration
  - use readl/writel relaxed
  - remove subsys_initcall
  - synchronize irq before killing tasklets
  - use BIT macro
  - misc cleanup


Ludovic Desroches (3):
  dma: at_xdmac: creation of the atmel eXtended DMA Controller driver
  ARM: dts: at_xdmac: add bindings documentation
  MAINTAINERS: add entry for Atmel XDMA driver

 .../devicetree/bindings/dma/atmel-xdma.txt         |   50 +
 MAINTAINERS                                        |    7 +
 drivers/dma/Kconfig                                |    7 +
 drivers/dma/Makefile                               |    1 +
 drivers/dma/at_xdmac.c                             | 1491 ++++++++++++++++++++
 include/dt-bindings/dma/at91.h                     |   25 +
 6 files changed, 1581 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/dma/atmel-xdma.txt
 create mode 100644 drivers/dma/at_xdmac.c

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2.0.3