[PATCH net-next v15 10/13] net: mdio: realtek-rtl9300: Open up C22 and C45 space in parallel

[Markus Stockhausen <markus.stockhausen@gmx.de>]

Until now the MDIO driver supports either access to the C22 or to
the C45 address space of the PHYs. This is due to the fact that
the polling configuration favours one of the address spaces and
limits access to the other space. E.g. when polling is set to
C22 most of the C45 space can not be accessed.

There are however some exceptions from that. EEE register access
is allowed independently from the polling mode [1]. As the
downstream driver already allows parallel C22/C45 access [2] do
this in upstream too.

[1] https://github.com/openwrt/openwrt/blob/main/target/linux/realtek/files-6.18/drivers/net/phy/realtek/realtek_multiport.c#L349
[2] https://github.com/openwrt/openwrt/blob/main/target/linux/realtek/files-6.18/drivers/net/mdio/mdio-realtek-otto.c#L1072

Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
---
 drivers/net/mdio/mdio-realtek-rtl9300.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/net/mdio/mdio-realtek-rtl9300.c b/drivers/net/mdio/mdio-realtek-rtl9300.c
index ae7ba86e90b9..b90972c1dc6a 100644
--- a/drivers/net/mdio/mdio-realtek-rtl9300.c
+++ b/drivers/net/mdio/mdio-realtek-rtl9300.c
@@ -688,13 +688,10 @@ static int otto_emdio_probe_one(struct device *dev, struct otto_emdio_priv *priv
 		return -ENOMEM;
 
 	bus->name = "Realtek Switch MDIO Bus";
-	if (priv->smi_bus_is_c45[mdio_bus]) {
-		bus->read_c45 = otto_emdio_read_c45;
-		bus->write_c45 = otto_emdio_write_c45;
-	} else {
-		bus->read = otto_emdio_read_c22;
-		bus->write = otto_emdio_write_c22;
-	}
+	bus->read_c45 = otto_emdio_read_c45;
+	bus->write_c45 = otto_emdio_write_c45;
+	bus->read = otto_emdio_read_c22;
+	bus->write = otto_emdio_write_c22;
 	bus->parent = dev;
 	bus->notify_phy_attach = otto_emdio_notify_phy_attach;
 	bus->notify_phy_detach = otto_emdio_notify_phy_detach;
-- 
2.55.0