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Subject[PATCH net-next 1/1] net: phy: Allow mdio buses to probe C45 before falling back to C22
Date
This patch makes mdiobus_scan() to try on C45 first as C45 can access
all devices. This allows the function available for the PHY that
supports for both C45 and C22.

Reviewed-by: Voon Weifeng <weifeng.voon@intel.com>
Reviewed-by: Ong Boon Leong <boon.leong.ong@intel.com>
Signed-off-by: Wong Vee Khee <vee.khee.wong@intel.com>
---
drivers/net/phy/mdio_bus.c | 5 +++++
include/linux/phy.h | 1 +
2 files changed, 6 insertions(+)

diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index 56094dd6bf26..372d0d088f7e 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -691,6 +691,11 @@ struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr)
if (IS_ERR(phydev))
phydev = get_phy_device(bus, addr, true);
break;
+ case MDIOBUS_C45_C22:
+ phydev = get_phy_device(bus, addr, true);
+ if (IS_ERR(phydev))
+ phydev = get_phy_device(bus, addr, false);
+ break;
}

if (IS_ERR(phydev))
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 189bc9881ea6..73d9be2c00f4 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -360,6 +360,7 @@ struct mii_bus {
MDIOBUS_C22,
MDIOBUS_C45,
MDIOBUS_C22_C45,
+ MDIOBUS_C45_C22,
} probe_capabilities;

/** @shared_lock: protect access to the shared element */
--
2.17.0
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