Wireless interface power

[John Watlington]

Javier,
   I don't know what your JTAG debugger is doing.
Richard verifies that the EC never intentionally deasserts the signal
enabling power to the WLAN.

We are too busy working on bringup to pay any more attention to
this right now.    Can you use a voltmeter instead of a JTAG debugger
to verify what you are reporting ?

wad

On Apr 19, 2007, at 10:26 PM, Javier Cardona wrote:

> Forwarded to the list.  Maybe someone else has an answer for this:
>
> ---------- Forwarded message ----------
> From: Andrey Yurovsky <andrey at cozybit.com>
> Date: Apr 18, 2007 9:33 PM
> Subject: Re: msh0 interface behavior change proposal
> To: John Watlington <wad at laptop.org>, Javier Cardona  
> <javier at cozybit.com>
>
>
> Hi John.  We tried suspending to RAM with the suspend6 (I think) and
> stock firmwares on build 384 and power was definitely cut:
> 1) attached debugger to WLAN module
> 2) # echo m > /sys/power/state
> 3) system suspends, [JTAG] debugger is no longer attached to the WLAN
> module's processor
>
> I checked /sys/power/state and it has 'mem' and 'disk' options, so I
> assume 'mem' is right.  Is there something I'm doing wrong or is there
> some other way to have it suspend but keep the power to the WLAN
> module on?  Thanks,
>
>   -Andrey
>
>
> On 4/18/07, John Watlington <wad at laptop.org> wrote:
>>
>> Javier,
>>     Power to the WLAN is NOT cut during suspend.  My explanation of
>> power domains
>> needs clarification.   The WLAN is powered almost continuously
>> (possibly even when
>> the laptop is powered off).   Hence it is in the "green" domain, not
>> the yellow domain.
>>
>> (...)
>>
>> wad
>>
>> On Apr 18, 2007, at 10:07 PM, Javier Cardona wrote:
>>
>>> All,
>>>
>>> (...)
>>> PS.  Unfortunately the wlan power is cut off when the laptop is
>>> suspended.  Otherwise we we would have basic autonomous mode up and
>>> running by now (
>>> http://wiki.laptop.org/go/
>>> Hardware_Power_Domains#Powered_in_Suspend_.28Yellow.29
>>> ).
>>>
> _______________________________________________
> Devel mailing list
> Devel at laptop.org
> http://mailman.laptop.org/mailman/listinfo/devel