[PATCH net-next 0/2] Add support for PIC64-HPSC/HX MDIO controller

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

Hello,

This series adds a driver for the two MDIO controllers of PIC64-HPSC/HX.
The hardware supports C22 and C45 but only C22 is implemented for now.

This MDIO hardware is based on a Microsemi design supported in Linux by
mdio-mscc-miim.c. However, The register interface is completely different
with pic64hpsc, hence the need for a separate driver.

The documentation recommends an input clock of 156.25MHz and a prescaler of
39, which yields an MDIO clock of 1.95MHz. This is the clock configuration
I've used in my tests.

This was tested on Microchip HB1301 evalkit which has a VSC8574 and a
VSC8541.

Thanks,
Charles

Charles Perry (2):
  dt-bindings: net: document Microchip PIC64-HPSC/HX MDIO controller
  net: mdio: add a driver for PIC64-HPSC/HX MDIO controller

 .../net/microchip,pic64hpsc-mdio.yaml         |  61 ++++++
 drivers/net/mdio/Kconfig                      |   7 +
 drivers/net/mdio/Makefile                     |   1 +
 drivers/net/mdio/mdio-pic64hpsc.c             | 207 ++++++++++++++++++
 4 files changed, 276 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/microchip,pic64hpsc-mdio.yaml
 create mode 100644 drivers/net/mdio/mdio-pic64hpsc.c

-- 
2.47.3