[U-Boot] [PATCH 1/5] net: phy: add ofnode node to struct phy_device

[Joe Hershberger]

On Thu, Jun 28, 2018 at 2:47 PM, Grygorii Strashko
<grygorii.strashko at ti.com> wrote:
> Now the UCLASS_ETH device "node" field is owerwritten by some network drivers in
> case of Ethernet PHYs which are linked to UCLASS_ETH device using
> "phy-handle" DT property and when Ethernet PHY driver needs to read some
> additional information from DT. In such cases following happens (in
> general):
>
> - network drivers
>         priv->phydev = phy_connect(priv->bus, priv->phyaddr, dev,
>                                    priv->interface);
>         <-- phydev is connected to dev which is UCLASS_ETH device
>
>         if (priv->phy_of_handle > 0)
>                 dev_set_of_offset(priv->phydev->dev, priv->phy_of_handle);
>         <-- phydev->dev->node is overwritten by phy-handle DT node
>
> - PHY driver in .config() callback
>         int node = dev_of_offset(dev);
>         <-- PHY driver uses overwritten dev->node
>         const void *fdt = gd->fdt_blob;
>
>          if (fdtdec_get_bool(fdt, node, "property"))
>                 ...
>
> As result, UCLASS_ETH device can't be used any more for DT accessing.
>
> This patch adds additional ofnode node field to struct phy_device which can
> be set explicitly by network drivers and used by PHY drivers, so
> overwriting can be avoided. Also add helper function phy_get_ofnode()
> which will check and return phy_device->node or dev_ofnode(phydev->dev) for
> backward compatibility with existing drivers.
>
> Signed-off-by: Grygorii Strashko <grygorii.strashko at ti.com>

Acked-by: Joe Hershberger <joe.hershberger at ni.com>