#3355 HIGH Update.: Wireless shutdown on Laptop Lid Close

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#3355: Wireless shutdown on Laptop Lid Close
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  Reporter:  kimquirk             |       Owner:  cjb      
      Type:  defect               |      Status:  new      
  Priority:  high                 |   Milestone:  Update.1 
 Component:  power manager (OHM)  |     Version:           
Resolution:                       |    Keywords:  update.1?
  Verified:  0                    |  
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Changes (by ashish):

 * cc: ramyac at marvell.com, rchokshi at marvell.com (added)


Comment:

 Replying to [comment:23 dwmw2]:
 > Ashish, thank you. Can you recommend the best way to quiesce the device
 while we sleep?
 >
 > Would it suffice to assert (and hold) the RESET line, then release it
 when we awake? Or should the (CMD_802_11_RESET, CMD_ACT_HALT) command do
 it? We don't busy-wait in boot2 code?
 >
 > The RESET line would be easier, because then the device will disappear
 from the USB bus and reappear as a 'different' device, and the driver will
 cope gracefully. If we issue the RESET/HALT command, I believe we then
 have to cope with reloading the firmware at runtime on the _same_ logical
 instance of the device. Which is something we'd like to do, but wasn't
 necessarily at the top of my priority list for this week.
 >
 > What would give the lowest power consumption?
 I guess you are talking of hardware RESET line, which I believe should be
 easier, and since device is out of USB bus this approach should consume
 minimum power. However, device state will be lost and a fresh device
 --including firmware download from host-- will appear on wakeup.
 I think RESET/HALT command may not be feasible at this point.
 I will check this with our hardware folks, all the possibilities, and will
 update you soon.

-- 
Ticket URL: <http://dev.laptop.org/ticket/3355#comment:26>
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