[PATCH v6 0/3] new Atmel DMA controller (XDMAC)

[Ludovic Desroches]

Hi,

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

Since there were no feedback about v5, could you give your ack if you agree with
this new version.

Changes from:
- v5
  - fix a bug when doing memcpy, condition to set the NDE was inverted
  - replace irqsave locks by bh variant
  - unmasked channel errors
- 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                             | 1493 ++++++++++++++++++++
 include/dt-bindings/dma/at91.h                     |   25 +
 6 files changed, 1583 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