linux-kernel - Re: [PATCH v2 2/2] phy dp83867: Make rgmii parameters optional

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Date:	Mon, 16 May 2016 22:15:09 +0200
From:	Andrew Lunn <andrew@...n.ch>
To:	Alexander Graf <agraf@...e.de>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	michal.simek@...inx.com, Dan Murphy <dmurphy@...com>
Subject: Re: [PATCH v2 2/2] phy dp83867: Make rgmii parameters optional

On Mon, May 16, 2016 at 08:52:43PM +0200, Alexander Graf wrote:
> If you compile without OF_MDIO support in an RGMII configuration, we fail
> to configure the dp83867 phy today by writing garbage into its configuration
> registers.
> 
> On the other hand if you do compile with OF_MDIO and the phy gets loaded via
> device tree, you have to have the properties set in the device tree, otherwise
> we fail to load the driver and don't even attach the generic phy driver to
> the interface anymore.
> 
> To make things slightly more consistent, make the rgmii configuration properties
> optional and allow a user to omit them in their device tree.

The binding document actually says they are required. It would be good
to make the binding documentation and the code consistent.

   Andrew