[RFC PATCH 0/3] Fix i2c bus hang on A0 version of the Armada XP SoCs

[Gregory CLEMENT]

Hi,

This series is an RFC to fix the i2c bus hang on A0 version of the
Armada XP SoCs. It occured on the the eraly release of the OpenBlocks
AX3-4 bords. Indeed the first variants of Armada XP SoCs (A0 stepping)
have issues related to the i2c controller which prevent to use the
offload mechanism and lead to a kernel hang during boot.

The best solution will be to detect the SoCs version at runtime and
use it in the driver, but I chosed to submit this version in case CPU
version detection feature takes more time than expected (and we
already reached the rc6 kernel).

Thanks,

Gregory


Gregory CLEMENT (3):
  arm: mvebu: add new dts file for old variant of Openblocks AX3-4
  i2c: mv64xxx: Fix bus hang on A0 version of the Armada XP SoCs
  i2c: mv64xxx: Document the newly introduced Armada XP A0 compatible

 .../devicetree/bindings/i2c/i2c-mv64xxx.txt        |   2 +-
 .../arm/boot/dts/armada-xp-a0-openblocks-ax3-4.dts |  40 +++++
 .../dts/armada-xp-common-openblocks-ax3-4.dtsi     | 177 +++++++++++++++++++++
 arch/arm/boot/dts/armada-xp-openblocks-ax3-4.dts   | 164 +------------------
 drivers/i2c/busses/i2c-mv64xxx.c                   |   8 +
 5 files changed, 227 insertions(+), 164 deletions(-)
 create mode 100644 arch/arm/boot/dts/armada-xp-a0-openblocks-ax3-4.dts
 create mode 100644 arch/arm/boot/dts/armada-xp-common-openblocks-ax3-4.dtsi

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