On 7/10/2020 11:55 PM, Calvin Johnson wrote:
> Introduce device_mdiobus_register() to register mdiobus
> in cases of either DT or ACPI.
>
> Signed-off-by: Calvin Johnson <calvin.johnson@xxxxxxxxxxx>
>
> ---
>
> Changes in v6:
> - change device_mdiobus_register() parameter position
> - improve documentation
>
> Changes in v5:
> - add description
> - clean up if else
>
> Changes in v4: None
> Changes in v3: None
> Changes in v2: None
>
> drivers/net/phy/mdio_bus.c | 26 ++++++++++++++++++++++++++
> include/linux/mdio.h | 1 +
> 2 files changed, 27 insertions(+)
>
> diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
> index 46b33701ad4b..8610f938f81f 100644
> --- a/drivers/net/phy/mdio_bus.c
> +++ b/drivers/net/phy/mdio_bus.c
> @@ -501,6 +501,32 @@ static int mdiobus_create_device(struct mii_bus *bus,
> return ret;
> }
>
> +/**
> + * device_mdiobus_register - register mdiobus for either DT or ACPI
> + * @bus: target mii_bus
> + * @dev: given MDIO device
> + *
> + * Description: Given an MDIO device and target mii bus, this function
> + * calls of_mdiobus_register() for DT node and mdiobus_register() in
> + * case of ACPI.
> + *
> + * Returns 0 on success or negative error code on failure.
> + */
> +int device_mdiobus_register(struct device *dev,
> + struct mii_bus *bus)
> +{
> + struct fwnode_handle *fwnode = dev_fwnode(dev);
> +
> + if (is_of_node(fwnode))
> + return of_mdiobus_register(bus, to_of_node(fwnode));
> + if (fwnode) {
> + bus->dev.fwnode = fwnode;
> + return mdiobus_register(bus);
> + }
> + return -ENODEV;
> +}
> +EXPORT_SYMBOL(device_mdiobus_register);
> +
> /**
> * __mdiobus_register - bring up all the PHYs on a given bus and attach them to bus
> * @bus: target mii_bus
> diff --git a/include/linux/mdio.h b/include/linux/mdio.h
> index 898cbf00332a..f454c5435101 100644
> --- a/include/linux/mdio.h
> +++ b/include/linux/mdio.h
> @@ -358,6 +358,7 @@ static inline int mdiobus_c45_read(struct mii_bus *bus, int prtad, int devad,
> return mdiobus_read(bus, prtad, mdiobus_c45_addr(devad, regnum));
> }
>
> +int device_mdiobus_register(struct device *dev, struct mii_bus *bus);
Humm, this header file does not have any of the mii_bus registration
functions declared, and it typically pertains to mdio_device instances
which are devices *on* the mii_bus. phy.h may be more appropriate here
until we break it up into phy_device proper, mii_bus, etc.
> int mdiobus_register_device(struct mdio_device *mdiodev);
> int mdiobus_unregister_device(struct mdio_device *mdiodev);
> bool mdiobus_is_registered_device(struct mii_bus *bus, int addr);
>
--
Florian
