netdev - Re: [PATCH] devicetree: net: micrel-ksz90x1.txt: Properly explain skew settings

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Date:   Thu, 06 Oct 2016 20:49:23 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     mike.looijmans@...ic.nl
Cc:     devicetree@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, robh+dt@...nel.org,
        mark.rutland@....com, andrew@...n.ch, f.fainelli@...il.com
Subject: Re: [PATCH] devicetree: net: micrel-ksz90x1.txt: Properly explain
 skew settings

From: Mike Looijmans <mike.looijmans@...ic.nl>
Date: Wed,  5 Oct 2016 16:03:08 +0200

> The KSZ9031 skew registers contain an offset, the chip's default value
> is "neutral" which does not add any skew. Programming a 0 into a skew
> property will actually set it the maximal negative adjustment and not
> to a neutral position as one would expect.
> 
> Explain this situation in the devicetree binding documentation and list
> the settings that the chip considers neutral.
> 
> Changing the implementation to accept negative values would have been
> a better solution, but would break existing configurations.
> 
> Signed-off-by: Mike Looijmans <mike.looijmans@...ic.nl>

Applied.