[PATCH net-next 1/1] net: phy: probe for C45 PHYs that return PHY ID of zero in C22 space
From: Wong Vee Khee <hidden>
Date: 2021-06-07 02:32:09
Also in:
lkml
Subsystem:
ethernet phy library, networking drivers, the rest · Maintainers:
Andrew Lunn, Heiner Kallweit, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
PHY devices such as the Marvell Alaska 88E2110 does not return a valid PHY ID when probed using Clause-22. The current implementation treats PHY ID of zero as a non-error and valid PHY ID, and causing the PHY device failed to bind to the Marvell driver. For such devices, we do an additional probe in the Clause-45 space, if a valid PHY ID is returned, we then proceed to attach the PHY device to the matching PHY ID driver. Signed-off-by: Wong Vee Khee <redacted> --- drivers/net/phy/phy_device.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 1539ea021ac0..495d86b4af7c 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c@@ -870,6 +870,18 @@ struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45) if (r) return ERR_PTR(r); + /* PHY device such as the Marvell Alaska 88E2110 will return a PHY ID + * of 0 when probed using get_phy_c22_id() with no error. Proceed to + * probe with C45 to see if we're able to get a valid PHY ID in the C45 + * space, if successful, create the C45 PHY device. + */ + if (!is_c45 && phy_id == 0 && bus->probe_capabilities >= MDIOBUS_C45) { + r = get_phy_c45_ids(bus, addr, &c45_ids); + if (!r) + return phy_device_create(bus, addr, phy_id, + true, &c45_ids); + } + return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids); } EXPORT_SYMBOL(get_phy_device);
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2.25.1