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36641b045c
xpcs_get_id() searches multiple MMDs for a known PHY ID, starting with MDIO_MMD_PCS (3). However not all integrators might have implemented that MMD on their MDIO bus. For example, the NXP SJA1105 and SJA1110 switches only implement vendor-specific MMD 1 and 2. When there is nothing on an MDIO bus at a certain address, traditionally the bus returns 0xffff, which means that the bus remained in its default pull-up state for the duration of the MDIO transaction. The 0xffff value is widely used in drivers/net/phy/phy_device.c (see get_phy_c22_id for example) to denote a missing device. So it makes sense for the xpcs to ignore this value as well, and continue its search, eventually finding the proper PHY ID in the vendor-specific MMDs. Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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| .. | ||
| appletalk | ||
| arcnet | ||
| bonding | ||
| caif | ||
| can | ||
| dsa | ||
| ethernet | ||
| fddi | ||
| fjes | ||
| hamradio | ||
| hippi | ||
| hyperv | ||
| ieee802154 | ||
| ipa | ||
| ipvlan | ||
| mdio | ||
| mhi | ||
| netdevsim | ||
| pcs | ||
| phy | ||
| plip | ||
| ppp | ||
| slip | ||
| team | ||
| usb | ||
| vmxnet3 | ||
| wan | ||
| wireguard | ||
| wireless | ||
| wwan | ||
| xen-netback | ||
| bareudp.c | ||
| dummy.c | ||
| eql.c | ||
| geneve.c | ||
| gtp.c | ||
| ifb.c | ||
| Kconfig | ||
| LICENSE.SRC | ||
| loopback.c | ||
| macsec.c | ||
| macvlan.c | ||
| macvtap.c | ||
| Makefile | ||
| mdio.c | ||
| mii.c | ||
| net_failover.c | ||
| netconsole.c | ||
| nlmon.c | ||
| ntb_netdev.c | ||
| rionet.c | ||
| sb1000.c | ||
| Space.c | ||
| sungem_phy.c | ||
| tap.c | ||
| thunderbolt.c | ||
| tun.c | ||
| veth.c | ||
| virtio_net.c | ||
| vrf.c | ||
| vsockmon.c | ||
| vxlan.c | ||
| xen-netfront.c | ||