net: phy: Allow mdio buses to auto-probe c45 devices

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The mdiobus_scan logic is currently hardcoded to only
work with c22 devices. This works fairly well in most
cases, but its possible that a c45 device doesn't respond
despite being a standard phy. If the parent hardware
is capable, it makes sense to scan for c22 devices before
falling back to c45.

As we want this to reflect the capabilities of the STA,
lets add a field to the mii_bus structure to represent
the capability. That way devices can opt into the extended
scanning. Existing users should continue to default to c22
only scanning as long as they are zero'ing the structure
before use.

Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
Signed-off-by: Calvin Johnson <calvin.johnson@oss.nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

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Jeremy Linton 2020-06-22 20:35:32 +05:30 • committed by David S. Miller

parent 1c59bb6bcb

commit 0cc8fecf04

2 changed files with 24 additions and 2 deletions

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18

drivers/net/phy/mdio_bus.c

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8

include/linux/phy.h

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