* David Rivshin (Allworx) [off-list ref] [160427 18:13]:

From: David Rivshin <redacted>

This series fixes a number of related issues around using phy-handle
properties in cpsw emac nodes.

Patch 1 fixes a bug if more than one slave is used, and either
slave uses the phy-handle property in the devicetree.

Patch 2 fixes a NULL pointer dereference which can occur if a
phy-handle property is used and of_phy_connect() return NULL,
such as with a bad devicetree.

Patch 3 fixes an issue where the phy-mode property would be ignored
if a phy-handle property was used. This also fixes a bogus error
message that would be emitted.

Patch 4 fixes makes the binding documentation more explicit that
exactly one PHY property should be used, and also marks phy_id as
deprecated.

Patch 5 cleans up the fixed-link case to work like the now-fixed
phy-handle case.

I have tested on the following hardware configurations:
 - (EVMSK) dual emac, phy_id property in both slaves
 - (EVMSK) dual emac, phy-handle property in both slaves
 - (EVMSK) a bad phy-handle property pointing to &mmc1
 - (EVMSK) phy_id property with incorrect PHY address
 - (BeagleBoneBlack) single emac, phy_id property
 - (custom) single emac, fixed-link subnode

Andrew Goodbody reported testing v2 on a board that doesn't use
dual_emac mode, but with 2 PHYs using phy-handle properties [1].

Nicolas Chauvet reported testing v2 on an HP t410 (dm8148).

Markus Brunner reported testing v1 on the following [2]:
 - emac0 with phy_id and emac1 with fixed phy
 - emac0 with phy-handle and emac1 with fixed phy
 - emac0 with fixed phy and emac1 with fixed phy

Quickly boot tested these against next on dra62x-j5eco EVM:

Tested-by: Tony Lindgren <tony@atomide.com>