linux-kernel - Re: [PATCH V2 4/5] dt-bindings: phy: Modify Broadcom NS USB 3.0 PHY binding to use MDIO

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Message-ID: <20170614152630.j2pq7fnqxdnu6chf@rob-hp-laptop>
Date:   Wed, 14 Jun 2017 10:26:30 -0500
From:   Rob Herring <robh@...nel.org>
To:     Rafał Miłecki <zajec5@...il.com>
Cc:     Kishon Vijay Abraham I <kishon@...com>,
        Yendapally Reddy Dhananjaya Reddy 
        <yendapally.reddy@...adcom.com>, Jon Mason <jonmason@...adcom.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        linux-arm-kernel@...ts.infradead.org,
        bcm-kernel-feedback-list@...adcom.com, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Rafał Miłecki <rafal@...ecki.pl>
Subject: Re: [PATCH V2 4/5] dt-bindings: phy: Modify Broadcom NS USB 3.0 PHY
 binding to use MDIO

On Thu, Jun 08, 2017 at 10:04:27PM +0200, Rafał Miłecki wrote:
> From: Rafał Miłecki <rafal@...ecki.pl>
> 
> Thanks to work done by Broadcom explaining their USB 3.0 PHY details we
> know it's attached to the MDIO bus. Use this knowledge to update the
> binding: make it a subnode to the MDIO bus and rework way of specifying
> required registers. This will describe hardware more precisely and will
> allow to support (describe) more devices attached to the MDIO.
> 
> While compatibility strings remain the same there isn't a direct
> conflict (compatibility breakage) for the binding. Originally it wasn't
> supposed to be used for MDIO subnode so this change should be safe
> unless some operating system was probing MDIO subnodes as standalone
> devices.
> 
> Signed-off-by: Rafał Miłecki <rafal@...ecki.pl>
> ---
> V2: Extend commit message to better describe reason and includ info on
>     (non-)breakage.
> ---
>  .../devicetree/bindings/phy/bcm-ns-usb3-phy.txt    | 27 +++++++++++++++-------
>  1 file changed, 19 insertions(+), 8 deletions(-)

Acked-by: Rob Herring <robh@...nel.org>