linux-kernel - Re: [PATCH net-next] of: of_mdio: Check if MDIO bus controller is available

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Date:	Sun, 01 May 2016 19:35:11 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	f.fainelli@...il.com
Cc:	netdev@...r.kernel.org, andrew@...n.ch, nathan.sullivan@...com,
	nicolas.ferre@...el.com, robh+dt@...nel.org,
	frowand.list@...il.com, grant.likely@...aro.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next] of: of_mdio: Check if MDIO bus controller is
 available

From: Florian Fainelli <f.fainelli@...il.com>
Date: Thu, 28 Apr 2016 14:55:10 -0700

> Add a check whether the 'struct device_node' pointer passed to
> of_mdiobus_register() is an available (aka enabled) node in the Device
> Tree.
> 
> Rationale for doing this are cases where an Ethernet MAC provides a MDIO
> bus controller and node, and an additional Ethernet MAC might be
> connecting its PHY/switches to that first MDIO bus controller, while
> still embedding one internally which is therefore marked as "disabled".
> 
> Instead of sprinkling checks like these in callers of
> of_mdiobus_register(), do this in a central location.
> 
> Signed-off-by: Florian Fainelli <f.fainelli@...il.com>

Applied, thanks Florian.