On Tue, Dec 15, 2020 at 07:53:26PM +0200, Andy Shevchenko wrote:
> On Tue, Dec 15, 2020 at 6:44 PM Calvin Johnson
> <calvin.johnson@xxxxxxxxxxx> wrote:
> >
> > Introduce fwnode_mdiobus_register() to register PHYs on the mdiobus.
> > If the fwnode is DT node, then call of_mdiobus_register().
> > If it is an ACPI node, then:
> > - disable auto probing of mdiobus
> > - register mdiobus
> > - save fwnode to mdio structure
> > - loop over child nodes & register a phy_device for each PHY
>
> ...
>
> > +/**
> > + * fwnode_mdiobus_register - Register mii_bus and create PHYs from fwnode
> > + * @mdio: pointer to mii_bus structure
> > + * @fwnode: pointer to fwnode of MDIO bus.
> > + *
> > + * This function registers the mii_bus structure and registers a phy_device
> > + * for each child node of @fwnode.
> > + */
> > +int fwnode_mdiobus_register(struct mii_bus *mdio, struct fwnode_handle *fwnode)
> > +{
> > + struct fwnode_handle *child;
> > + unsigned long long addr;
> > + acpi_status status;
> > + int ret;
> > +
> > + if (is_of_node(fwnode)) {
> > + return of_mdiobus_register(mdio, to_of_node(fwnode));
> > + } else if (is_acpi_node(fwnode)) {
>
> I would rather see this as simple as
>
> if (is_of_node(fwnode))
> return of_mdiobus_register(mdio, to_of_node(fwnode));
> if (is_acpi_node(fwnode))
> return acpi_mdiobus_register(mdio, fwnode);
>
> where the latter one is defined somewhere in drivers/acpi/.
Makes sense. I'll do it. But I think it will be better to place
acpi_mdiobus_register() here itself in the network subsystem, maybe
/drivers/net/mdio/acpi_mdio.c.
>
> > + /* Mask out all PHYs from auto probing. */
> > + mdio->phy_mask = ~0;
> > + ret = mdiobus_register(mdio);
> > + if (ret)
> > + return ret;
> > +
> > + mdio->dev.fwnode = fwnode;
> > + /* Loop over the child nodes and register a phy_device for each PHY */
> > + fwnode_for_each_child_node(fwnode, child) {
>
> > + status = acpi_evaluate_integer(ACPI_HANDLE_FWNODE(child),
> > + "_ADR", NULL, &addr);
> > + if (ACPI_FAILURE(status)) {
>
> Isn't it fwnode_get_id() now?
Yes. Will change it.
>
> > + pr_debug("_ADR returned %d\n", status);
> > + continue;
> > + }
>
> > + if (addr < 0 || addr >= PHY_MAX_ADDR)
> > + continue;
>
> addr can't be less than 0.
Yes. will update in v3.
>
> > + ret = fwnode_mdiobus_register_phy(mdio, child, addr);
> > + if (ret == -ENODEV)
> > + dev_err(&mdio->dev,
> > + "MDIO device at address %lld is missing.\n",
> > + addr);
> > + }
> > + return 0;
> > + }
> > + return -EINVAL;
> > +}
>
> --
> With Best Regards,
> Andy Shevchenko
