This small series add the initial support for the Airoha AN8855 Switch. It's a 5 port Gigabit Switch with SGMII/HSGMII upstream port. This is starting to get in the wild and there are already some router having this switch chip. It's conceptually similar to mediatek switch but register and bits are different. And there is that massive Hell that is the PCS configuration. Saddly for that part we have absolutely NO documentation currently. There is this special thing where PHY needs to be calibrated with values from the switch efuse. (the thing have a whole cpu timer and MCU) Some cleanup API are used and one extra patch for mdio_mutex_nested is introduced. As suggested some time ago, the use of such API is limited to scoped variants and not the guard ones. Posting as RFC as I expect in later version to add additional feature but this is already working and upstream-ready. So this is really to have a review of the very basic features and if I missed anything in recent implementation of DSA. Christian Marangi (4): net: mdio: implement mdio_mutex_nested guard() variant dt-bindings: net: dsa: Add Airoha AN8855 Gigabit Switch documentation net: dsa: Add Airoha AN8855 5-Port Gigabit DSA Switch driver net: phy: Add Airoha AN8855 Internal Switch Gigabit PHY .../bindings/net/dsa/airoha,an8855.yaml | 146 ++ MAINTAINERS | 11 + drivers/net/dsa/Kconfig | 9 + drivers/net/dsa/Makefile | 1 + drivers/net/dsa/an8855.c | 2008 +++++++++++++++++ drivers/net/dsa/an8855.h | 492 ++++ drivers/net/phy/Kconfig | 5 + drivers/net/phy/Makefile | 1 + drivers/net/phy/air_an8855.c | 187 ++ include/linux/mdio.h | 4 + 10 files changed, 2864 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/dsa/airoha,an8855.yaml create mode 100644 drivers/net/dsa/an8855.c create mode 100644 drivers/net/dsa/an8855.h create mode 100644 drivers/net/phy/air_an8855.c -- 2.45.2
