[RFC PATCH 0/3] 1588 support for Zynq Ultrascale+ MPSoC

[Harini Katakam <harini.katakam@xilinx.com>]

This series adds 1588 support in Cadence MACB driver for Zynq Ultrascale+ MPSoC

This IP supports HW timestamping and this is accesible through extended BD.
The first patch adds support for extended BD through a config option.
Since this required the use two extra u32 variables in the macb_dma_desc
structure, we opted for a static config option.
The second patch adds support to access the timestamp in TX and RX paths,
register to PTP framework and provide time and frequency adjustment.
This was tested in  two step mode using linuxptp.
The TSU clock is expected to be provided through devicetree.

Harini Katakam (3):
  net: macb: Add support for extended BD with a config option
  net: macb: Add support for 1588 for Zynq Ultrascale+ MPSoC
  devicetree: macb: Add optional property tsu-clk

 Documentation/devicetree/bindings/net/macb.txt |    3 +
 drivers/net/ethernet/cadence/Kconfig           |    8 +
 drivers/net/ethernet/cadence/macb.c            |  376 +++++++++++++++++++++++-
 drivers/net/ethernet/cadence/macb.h            |   72 +++++
 4 files changed, 451 insertions(+), 8 deletions(-)

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1.7.9.5