This patch register mdio-bus for the lan937x series switch. mdio read and write uses the vphy for accessing the phy register. Signed-off-by: Arun Ramadoss <arun.ramadoss@xxxxxxxxxxxxx> --- drivers/net/dsa/microchip/lan937x_main.c | 74 ++++++++++++++++++++++++ 1 file changed, 74 insertions(+) diff --git a/drivers/net/dsa/microchip/lan937x_main.c b/drivers/net/dsa/microchip/lan937x_main.c index 5a2e14fe3cf3..7090947cf52c 100644 --- a/drivers/net/dsa/microchip/lan937x_main.c +++ b/drivers/net/dsa/microchip/lan937x_main.c @@ -7,6 +7,7 @@ #include <linux/iopoll.h> #include <linux/phy.h> #include <linux/of_net.h> +#include <linux/of_mdio.h> #include <linux/if_bridge.h> #include <linux/math.h> #include <net/dsa.h> @@ -136,6 +137,73 @@ void lan937x_w_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 val) lan937x_internal_phy_write(dev, addr, reg, val); } +static int lan937x_sw_mdio_read(struct mii_bus *bus, int addr, int regnum) +{ + struct ksz_device *dev = bus->priv; + u16 val; + int ret; + + if (regnum & MII_ADDR_C45) + return -EOPNOTSUPP; + + ret = lan937x_internal_phy_read(dev, addr, regnum, &val); + if (ret < 0) + return ret; + + return val; +} + +static int lan937x_sw_mdio_write(struct mii_bus *bus, int addr, int regnum, + u16 val) +{ + struct ksz_device *dev = bus->priv; + + if (regnum & MII_ADDR_C45) + return -EOPNOTSUPP; + + return lan937x_internal_phy_write(dev, addr, regnum, val); +} + +static int lan937x_mdio_register(struct ksz_device *dev) +{ + struct dsa_switch *ds = dev->ds; + struct device_node *mdio_np; + struct mii_bus *bus; + int ret; + + mdio_np = of_get_child_by_name(dev->dev->of_node, "mdio"); + if (!mdio_np) { + dev_err(ds->dev, "no MDIO bus node\n"); + return -ENODEV; + } + + bus = devm_mdiobus_alloc(ds->dev); + if (!bus) { + of_node_put(mdio_np); + return -ENOMEM; + } + + bus->priv = dev; + bus->read = lan937x_sw_mdio_read; + bus->write = lan937x_sw_mdio_write; + bus->name = "lan937x slave smi"; + snprintf(bus->id, MII_BUS_ID_SIZE, "SMI-%d", ds->index); + bus->parent = ds->dev; + bus->phy_mask = ~ds->phys_mii_mask; + + ds->slave_mii_bus = bus; + + ret = devm_of_mdiobus_register(ds->dev, bus, mdio_np); + if (ret) { + dev_err(ds->dev, "unable to register MDIO bus %s\n", + bus->id); + } + + of_node_put(mdio_np); + + return ret; +} + int lan937x_reset_switch(struct ksz_device *dev) { u32 data32; @@ -228,6 +296,12 @@ int lan937x_setup(struct dsa_switch *ds) return ret; } + ret = lan937x_mdio_register(dev); + if (ret < 0) { + dev_err(dev->dev, "failed to register the mdio"); + return ret; + } + /* The VLAN aware is a global setting. Mixed vlan * filterings are not supported. */ -- 2.36.1