net: phy: realtek: support unaligned RTL8224 PHY packages

The RTL8224 driver groups its four ports by rounding each PHY address
down to a multiple of four and uses the low two address bits as the
port index. This assumes that the first port's MDIO address is aligned
to a multiple of four.

The Hasivo S1100WP-8GT-2S+ uses two RTL8224 packages at MDIO addresses
1-4 and 5-8. Extend the driver to support such configurations by using
the base address from an ethernet-phy-package node when present and
calculating each port's offset relative to that address.

Use the package-relative port index to select the MDI pair order and
polarity fields. Reject PHY addresses outside the four-port package
and propagate explicit package errors rather than falling back to
another base address.

Share base-address parsing between probe and MDI configuration, and
calculate the port offset when configuring MDI rather than caching it
in an additional per-PHY private allocation.

Join both DT-described and legacy packages with devm_phy_package_join(),
as only the base address is needed, not a shared package node. This
avoids mixing OF and non-OF joins, which can unbalance package-node
references when members select the same base address.

Keep the existing aligned-address assumption when no package node
is present.

Signed-off-by: Manuel Stocker <mensi@mensi.ch>
[Oskari: rebased on net-next and reworked package handling]
Signed-off-by: Oskari Lemmela <oskari@lemmela.net>
Link: https://patch.msgid.link/20261013185635.1412452-3-oskari@lemmela.net
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

0 files changed, 0 insertions, 0 deletions