Support for Marvell AHCI interface on Armada 38x

Hello,

The Marvell Armada 38x ARM processors use an AHCI compatible interface for SATA (in replacement of the Marvell-specific SATA interface, handled by the sata_mv driver). However, like all DMA-capable Marvell interfaces, some specific MBus window configuration must be done, so a small specific glue layer is needed, which relies on the recently introduced libahci_platform.c.

Changes since v1:

* Rebased on top of v3.15-rc1

* Added a preliminary patch that orders alphabetically the list of compatible strings in the DT binding document ahci-platform.txt. Suggested by Andrew Lunn.

* Made the availability of MBus DRAM window informations mandatory. Suggested by Andrew Lunn.

* Fixed the module alias name. Suggested by Bartlomiej Zolnierkiewicz.

Details of the patches:

* The first patch is a DT binding documentation cleanup. I believe it should be taken by the ATA maintainer, because the second patch (driver patch) depends on it.

* The second patch of this series contains the driver itself, which is fairly straight-forward. It should be taken by Tejun Heo as the ATA maintainer.

* The last three patches add the Device Tree and defconfig changes. They should be taken by the respective ARM maintainers (mvebu maintainers for the DT and mvebu_v7_defconfig, and arm-soc maintainers for the multi_v7_defconfig change).

Thanks!

Thomas

Thomas Petazzoni (5):
Documentation: dt-bindings: reformat and order list of ahci-platform
compatibles
ata: ahci_mvebu: new driver for Marvell Armada 380 AHCI interfaces
ARM: mvebu: add Device Tree description of AHCI interfaces on Armada

    38x

ARM: configs: add ahci_mvebu to mvebu_v7_defconfig
ARM: configs: add ahci_mvebu to multi_v7_defconfig

 .../devicetree/bindings/ata/ahci-platform.txt      |  13 ++-
 arch/arm/boot/dts/armada-385-db.dts                |   8 ++
 arch/arm/boot/dts/armada-38x.dtsi                  |  16 +++
 arch/arm/configs/multi_v7_defconfig                |   1 +
 arch/arm/configs/mvebu_v7_defconfig                |   1 +
 drivers/ata/Kconfig                                |   9 ++
 drivers/ata/Makefile                               |   1 +
 drivers/ata/ahci_mvebu.c                           | 107 +++++++++++++++++++++
 8 files changed, 152 insertions(+), 4 deletions(-)
 create mode 100644 drivers/ata/ahci_mvebu.c