netdev - Re: [PATCH 7/7] gianfar: add support for wake-on-packet

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Message-Id: <5D4A38A7-B662-40CC-97AB-9E2A64531776@kernel.crashing.org>
Date:	Tue, 8 Nov 2011 07:42:09 -0600
From:	Kumar Gala <galak@...nel.crashing.org>
To:	Li Yang-R58472 <r58472@...escale.com>
Cc:	Wood Scott-B07421 <B07421@...escale.com>,
	Zhao Chenhui-B35336 <B35336@...escale.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
	Fleming Andy-AFLEMING <afleming@...escale.com>
Subject: Re: [PATCH 7/7] gianfar: add support for wake-on-packet


On Nov 8, 2011, at 5:20 AM, Li Yang-R58472 wrote:

> 
> 
>> -----Original Message-----
>> From: linuxppc-dev-bounces+leoli=freescale.com@...ts.ozlabs.org
>> [mailto:linuxppc-dev-bounces+leoli=freescale.com@...ts.ozlabs.org] On
>> Behalf Of Scott Wood
>> Sent: Saturday, November 05, 2011 5:12 AM
>> To: Zhao Chenhui-B35336
>> Cc: netdev@...r.kernel.org; linuxppc-dev@...ts.ozlabs.org; Fleming Andy-
>> AFLEMING
>> Subject: Re: [PATCH 7/7] gianfar: add support for wake-on-packet
>> 
>> On 11/04/2011 07:40 AM, Zhao Chenhui wrote:
>>> diff --git a/Documentation/devicetree/bindings/net/fsl-tsec-phy.txt
>> b/Documentation/devicetree/bindings/net/fsl-tsec-phy.txt
>>> index 2c6be03..543e36c 100644
>>> --- a/Documentation/devicetree/bindings/net/fsl-tsec-phy.txt
>>> +++ b/Documentation/devicetree/bindings/net/fsl-tsec-phy.txt
>>> @@ -56,6 +56,9 @@ Properties:
>>>     hardware.
>>>   - fsl,magic-packet : If present, indicates that the hardware supports
>>>     waking up via magic packet.
>>> +  - fsl,wake-on-filer : If present, indicates that the hardware
>> supports
>>> +    waking up via arp request to local ip address or unicast packet to
>>> +    local mac address.
>> 
>> Is there any way to determine this at runtime via the device's registers?
>> 
>> I think TSEC_ID2[TSEC_CFG] can be used.  The manual describes it
>> awkwardly, but it looks like 0x20 is the bit for the filer.
> 
> That bit only defines the filer feature but not wakeup on it.  Another solution is to get the capability from the fsl_pmc driver, but will make the driver a lot more complex.

I don't believe there is a way to know this from the controller itself.  We have to use device tree for it.

- k--
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