[PATCH net-next v3 0/3] Initial support for PIC64-HPSC/HX Ethernet endpoint

[Charles Perry <charles.perry@microchip.com>]

Hello,

This series add basic support for Microchip "PIC64-HPSC" and "PIC64HX"
Ethernet endpoint. Both SoCs contain 4 GEM IP with support for
MII/RGMII/SGMII/USXGMII at rates of 10M to 10G. Only RGMII and SGMII at a
rate of 1G is tested for now. Each GEM IP has 8 priority queues and the
revision register reads 0x220c010e.

One particularity of this instantiation of GEM is that the MDIO controller
within the GEM IP is disconnected from any physical pin and the SoC rely on
another standalone MDIO controller.

The maximum jumbo frame size also seems to be different on PIC64-HPSC/HX
(16383) than what most other platforms use (10240). I've found that I need
to tweak a bit the MTU calculation for this, otherwise the RXBS field of
the DMACFG register overflows. See patch 2 for more details.

PIC64-HPSC/HX also supports other features guarded behind CAPS bit like
MACB_CAPS_QBV but I've omitted those intentionally because I didn't test
these.

Thanks,
Charles

Changes in v3:
  - Fix one more "p64h" -> "pic64hpsc"
  - Remove .clk_init assignation since it's no longer required (patch 3)

Changes in v2:
  - Use separate compatibles for PIC64-HPSC and PIC64HX
  - "p64h" -> "pic64hpsc"
  - Merge patch 2 into patch 1

Charles Perry (3):
  dt-bindings: net: cdns,macb: add a compatible for Microchip pic64hpsc
  net: macb: add safeguards for jumbo frame larger than 10240
  net: macb: add support for Microchip pic64hpsc ethernet endpoint

 .../devicetree/bindings/net/cdns,macb.yaml    | 19 +++++++++++++++++++
 drivers/net/ethernet/cadence/macb_main.c      | 15 +++++++++++++--
 2 files changed, 32 insertions(+), 2 deletions(-)

-- 
2.47.3