tree beccd0757835103006011f4fc23ce34c157b5be8
parent 4d5fdb62cb2b37bb82532509180602acf88d27b7
author Roger Quadros <rogerq@ti.com> 1472042150 +0300
committer Joe Hershberger <joe.hershberger@ni.com> 1476379506 -0500

board: am335x-icev2: add ethernet phy mode detection logic

Both ethernet ports can be used as CPSW ethernet (RMII mode)
or PRU ethernet (MII mode) by setting the jumper near the port.
Read the jumper value and set the pinmux, external mux and
PHY clock accordingly.

As jumper line is overridden by PHY RX_DV pin immediately
after bootstrap (power-up/reset), we have to use GPIO edge
detection to capture the jumper line status.

As u-boot doesn't provide any infrastructure for GPIO edge
detection, we directly access the GPIO registers.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>