From 2b0ba96cea6066d2543066fa524120b384f3bd6b Mon Sep 17 00:00:00 2001
From: Sylvain Rochet <sylvain.rochet@finsecur.com>
Date: Fri, 13 Feb 2015 21:35:33 +0100
Subject: [PATCH] net: phy: micrel: disable NAND-tree for KSZ8021, KSZ8031,
 KSZ8051, KSZ8081

NAND-tree is used to check wiring between MAC and PHY using NAND gates
on the PHY side, hence the name.

NAND-tree initial status is latched at reset by probing the IRQ pin.
However some devices are sharing the PHY IRQ pin with other peripherals
such as Atmel SAMA5D[34]x-EK boards when using the optional TM7000
display module, therefore they are switching the PHY in NAND-tree test
mode depending on the current IRQ line status at reset.

This patch ensure PHY is not in NAND-tree test mode for all Micrel PHYs
using IRQ line as a NAND-tree toggle mode at reset.

Signed-off-by: Sylvain Rochet <sylvain.rochet@finsecur.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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