net: systemport: Fix missing phy-handle parsing for non-fixed PHYs

In bcm_sysport_probe(), priv->phy_dn is only initialized if the device
tree node has a fixed-link configuration (of_phy_is_fixed_link). When
connecting to a discrete MDIO-attached PHY referenced via 'phy-handle',
priv->phy_dn remains NULL. This causes of_phy_connect() during
bcm_sysport_open() to fail with -ENODEV since of_phy_find_device(NULL)
returns NULL.

Fix this by parsing 'phy-handle' via of_parse_phandle() and falling back
to of_phy_is_fixed_link(). Ensure proper of_node_get() and of_node_put()
refcounting lifecycle on both error unwinding and module remove paths.

Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Nicolai Buchwitz <nb@tipi-net.de>
Link: https://patch.msgid.link/20260922222525.3992167-2-florian.fainelli@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

0 files changed, 0 insertions, 0 deletions