The Ocelot switch has currently an hardcoded SerDes muxing that suits only a particular use case. Any other board setup will fail to work. To prepare for upcoming boards' support that do not have the same muxing, create a PHY driver that will handle all possible cases. A SerDes can work in SGMII, QSGMII or PCIe and is also muxed to use a given port depending on the selected mode or board design. The SerDes configuration is in the middle of an address space (HSIO) that is used to configure some parts in the MAC controller driver, that is why we need to use a syscon so that we can write to the same address space from different drivers safely using regmap. This breaks backward compatibility but it's fine because there's only one board at the moment that is using what's modified in this patch series. This will break git bisect. Even though this patch series is about SerDes __muxing__ configuration, the DT node is named serdes for the simple reason that I couldn't find any mention to SerDes anywhere else from the address space handled by this driver. Thanks, Quentin v3: - add Paul Burton's Acked-By on MIPS patches so that the patch series can be merged in the net tree in its entirety, v2: - use a switch case for setting the phy_mode in the SerDes driver as suggested by Andrew, - stop replacing the value of the error pointer in the SerDes driver, - use a dev_dbg for the deferring of the probe in the SerDes driver, - use constants in the Device Tree to select the SerDes macro in use with a port, - adapt the SerDes driver to use those constants, - add a header file in include/dt-bindings for the constants, - fix space/tab issue, Quentin Schulz (11): MIPS: mscc: ocelot: make HSIO registers address range a syscon dt-bindings: net: ocelot: remove hsio from the list of register address spaces net: mscc: ocelot: get HSIO regmap from syscon net: mscc: ocelot: move the HSIO header to include/soc net: mscc: ocelot: simplify register access for PLL5 configuration phy: add QSGMII and PCIE modes dt-bindings: phy: add DT binding for Microsemi Ocelot SerDes muxing MIPS: mscc: ocelot: add SerDes mux DT node dt-bindings: add constants for Microsemi Ocelot SerDes driver phy: add driver for Microsemi Ocelot SerDes muxing net: mscc: ocelot: make use of SerDes PHYs for handling their configuration Documentation/devicetree/bindings/mips/mscc.txt | 16 +- Documentation/devicetree/bindings/net/mscc-ocelot.txt | 9 +- Documentation/devicetree/bindings/phy/phy-ocelot-serdes.txt | 40 +- arch/mips/boot/dts/mscc/ocelot.dtsi | 19 +- drivers/net/ethernet/mscc/Kconfig | 2 +- drivers/net/ethernet/mscc/ocelot.c | 16 +- drivers/net/ethernet/mscc/ocelot.h | 79 +- drivers/net/ethernet/mscc/ocelot_board.c | 61 +- drivers/net/ethernet/mscc/ocelot_hsio.h | 785 +------ drivers/net/ethernet/mscc/ocelot_regs.c | 93 +- drivers/phy/Kconfig | 1 +- drivers/phy/Makefile | 1 +- drivers/phy/mscc/Kconfig | 11 +- drivers/phy/mscc/Makefile | 5 +- drivers/phy/mscc/phy-ocelot-serdes.c | 288 ++- include/dt-bindings/phy/phy-ocelot-serdes.h | 19 +- include/linux/phy/phy.h | 2 +- include/soc/mscc/ocelot_hsio.h | 859 +++++++- 18 files changed, 1341 insertions(+), 965 deletions(-) create mode 100644 Documentation/devicetree/bindings/phy/phy-ocelot-serdes.txt delete mode 100644 drivers/net/ethernet/mscc/ocelot_hsio.h create mode 100644 drivers/phy/mscc/Kconfig create mode 100644 drivers/phy/mscc/Makefile create mode 100644 drivers/phy/mscc/phy-ocelot-serdes.c create mode 100644 include/dt-bindings/phy/phy-ocelot-serdes.h create mode 100644 include/soc/mscc/ocelot_hsio.h base-commit: ee4fccbee7d397c4d937e20d8c76212ffc23a7e3 -- git-series 0.9.1
