linux-kernel - Re: [PATCH 8/9] ARM: berlin: Add phy-connection-type to BG2Q PHY

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Date:	Tue, 21 Oct 2014 16:08:35 +0400
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
CC:	Antoine Ténart 
	<antoine.tenart@...e-electrons.com>,
	"David S. Miller" <davem@...emloft.net>,
	Florian Fainelli <f.fainelli@...il.com>,
	Eric Miao <eric.y.miao@...il.com>,
	Haojian Zhuang <haojian.zhuang@...il.com>,
	linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 8/9] ARM: berlin: Add phy-connection-type to BG2Q PHY

On 10/21/2014 3:46 PM, Sebastian Hesselbarth wrote:

>>> From: Antoine Ténart <antoine.tenart@...e-electrons.com>

>>> Internal FastEthernet PHY on BG2Q is connected via MII, add a
>>> corresponding phy-connection-type property.

>>> Tested-by: Antoine Ténart <antoine.tenart@...e-electrons.com>
>>> Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
>>> ---
>>> Cc: "David S. Miller" <davem@...emloft.net>
>>> Cc: "Antoine Ténart" <antoine.tenart@...e-electrons.com>
>>> Cc: Florian Fainelli <f.fainelli@...il.com>
>>> Cc: Eric Miao <eric.y.miao@...il.com>
>>> Cc: Haojian Zhuang <haojian.zhuang@...il.com>
>>> Cc: linux-arm-kernel@...ts.infradead.org
>>> Cc: netdev@...r.kernel.org
>>> Cc: devicetree@...r.kernel.org
>>> Cc: linux-kernel@...r.kernel.org
>>> ---
>>>   arch/arm/boot/dts/berlin2q.dtsi | 1 +
>>>   1 file changed, 1 insertion(+)

>>> diff --git a/arch/arm/boot/dts/berlin2q.dtsi
>>> b/arch/arm/boot/dts/berlin2q.dtsi
>>> index 891d56b03922..6dbc520bddc1 100644
>>> --- a/arch/arm/boot/dts/berlin2q.dtsi
>>> +++ b/arch/arm/boot/dts/berlin2q.dtsi
>>> @@ -127,6 +127,7 @@
>>>               status = "disabled";
>>>
>>>               ethphy0: ethernet-phy@0 {
>>> +                phy-connection-type = "mii";

>>     You're adding this prop to the PHY node? That's very weird...
>> normally, it's a property of a MDIO bus node.

> Sergei,

> How can this be a property of the MDIO bus node? Just think of an MDIO
> bus with two PHYs where one is connected via GMII and the other via
> RGMII? How should this work?

    Hm, this is an unexpected case...

> But you are right that the property should not be part of the PHY node
> but the controller node instead. I'll rework and send an update, thanks
> for the hint.

    Oh, not at all. :-)

> Sebastian

WBR, Sergei

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