net: dsa: mv88e6xxx: Add serdes register read/write helper

Add a helper for accessing SERDES registers of the 6390 family.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrew Lunn 2018-08-09 15:38:43 +02:00 • committed by David S. Miller
commit e6891c76dd
2 changed files with 25 additions and 11 deletions