github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-07-27 17:47:41 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

net: mdio: realtek-rtl9300: Correctly handle ethernet-phy-package

Browse Source 
Realtek Otto switches usually make use of multiport PHYs (e.g. 8 port
1G RTL8218D or 4 port 2.5G RTL8224). The device tree can describe this
fact via an "ethernet-phy-package" node that resides between the bus
and the PHY node.

When looking up the device tree bus node via the chain port->phy->parent
the driver totally ignores the existence of a PHY package. Enhance the
lookup to take care of this feature.

Link: https://github.com/openwrt/openwrt/pull/23591
Signed-off-by: Manuel Stocker <mensi@mensi.ch>
Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Link: https://patch.msgid.link/20260603175924.123019-8-markus.stockhausen@gmx.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Manuel Stocker 2026-06-03 19:59:24 +02:00 committed by Jakub Kicinski
parent 56b4864150
commit 50b682a5ae
1 changed files with 16 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/net/mdio/mdio-realtek-rtl9300.c
View File

@ -432,6 +432,21 @@ static int otto_emdio_probe_one(struct device *dev, struct otto_emdio_priv *priv
return 0;
}
static struct device_node *otto_emdio_get_bus_node(struct device_node *dn)
{
struct device_node *parent = of_get_parent(dn);
struct device_node *grandparent;
if (parent && of_node_name_eq(parent, "ethernet-phy-package")) {
grandparent = of_get_parent(parent);
of_node_put(parent);
return grandparent;
}
return parent;
}
/* The mdio-controller is part of a switch block so we parse the sibling
* ethernet-ports node and build a mapping of the switch port to MDIO bus/addr
* based on the phy-handle.
@ -457,7 +472,7 @@ static int otto_emdio_map_ports(struct device *dev)
if (!phy_dn)
continue;
bus_dn = of_get_parent(phy_dn);
bus_dn = otto_emdio_get_bus_node(phy_dn);
if (!bus_dn)
goto put_nodes;