[PATCH v6 00/12] aspeed: Add SCU interrupt controller and XDMA engine drivers

[Eddie James]

This series first adds a driver to control the interrupt controller provided by
the System Control Unit (SCU) on the AST2500 and AST2600 SOCs. The interrupts
made available are necessary for the control of the XDMA engine embedded in the
same Aspeed SOCs.
This series then adds a driver to control the XDMA engine. This driver was
previously sent to the list without support for the AST2600, and has been
refactored significantly to enable that support. The XDMA engine performs
automatic DMA operations between the Aspeed SOC (acting as a BMC) and a host
processor.

Changes since v5:
 - Rework the XDMA locking completely; thanks Andrew Jeffrey for the help.

Changes since v4:
 - Fix dts documentation example for XDMA
 - Add errno in warning for SCU failure in XDMA PCIe config
 - Add a check for in_reset before proceeding in O_NONBLOCK case
 - Add comments to memory sizes in the witherspoon/tacoma XDMA dts entries

Changes since v3:
 - See individual patches; just clean-up items

Changes since v2:
 - See individual patches
 - Drop rainier dts patch
 - In summary, remove references to VGA memory as the XDMA driver doesn't care
   where it is. Remove SDRAM controller reference. Move user reset
   functionality to a separate patch and make it an ioctl.

Changes since v1:
 - See individual patches
 - In summary, first the irqchip driver switched to use the parent SCU regmap
   rather than iomapping it's register. Secondly, the XDMA initialization
   switched to use properties from the device tree rather than dynamically
   calculate memory spaces, and system config.

Eddie James (12):
  dt-bindings: interrupt-controller: Add Aspeed SCU interrupt controller
  irqchip: Add Aspeed SCU interrupt controller
  ARM: dts: aspeed: ast2500: Add SCU interrupt controller
  ARM: dts: aspeed: ast2600: Add SCU interrupt controllers
  dt-bindings: soc: Add Aspeed XDMA Engine
  soc: aspeed: Add XDMA Engine Driver
  soc: aspeed: xdma: Add user interface
  soc: aspeed: xdma: Add reset ioctl
  ARM: dts: aspeed: ast2500: Add XDMA Engine
  ARM: dts: aspeed: ast2600: Add XDMA Engine
  ARM: dts: aspeed: witherspoon: Enable XDMA Engine
  ARM: dts: aspeed: tacoma: Enable XDMA engine

 .../interrupt-controller/aspeed,ast2xxx-scu-ic.txt |   23 +
 .../devicetree/bindings/soc/aspeed/xdma.txt        |   40 +
 MAINTAINERS                                        |   16 +
 arch/arm/boot/dts/aspeed-bmc-opp-tacoma.dts        |    6 +
 arch/arm/boot/dts/aspeed-bmc-opp-witherspoon.dts   |    6 +
 arch/arm/boot/dts/aspeed-g5.dtsi                   |   19 +
 arch/arm/boot/dts/aspeed-g6.dtsi                   |   27 +
 drivers/irqchip/Makefile                           |    2 +-
 drivers/irqchip/irq-aspeed-scu-ic.c                |  239 +++++
 drivers/soc/aspeed/Kconfig                         |    8 +
 drivers/soc/aspeed/Makefile                        |    1 +
 drivers/soc/aspeed/aspeed-xdma.c                   | 1025 ++++++++++++++++++++
 .../interrupt-controller/aspeed-scu-ic.h           |   23 +
 include/uapi/linux/aspeed-xdma.h                   |   42 +
 14 files changed, 1476 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/aspeed,ast2xxx-scu-ic.txt
 create mode 100644 Documentation/devicetree/bindings/soc/aspeed/xdma.txt
 create mode 100644 drivers/irqchip/irq-aspeed-scu-ic.c
 create mode 100644 drivers/soc/aspeed/aspeed-xdma.c
 create mode 100644 include/dt-bindings/interrupt-controller/aspeed-scu-ic.h
 create mode 100644 include/uapi/linux/aspeed-xdma.h

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1.8.3.1