#12456 NORM 13.1.0: XO-4 C1 USB enumeration failure on resume

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#12456: XO-4 C1 USB enumeration failure on resume
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           Reporter:  greenfeld  |       Owner:  cjb                              
               Type:  defect     |      Status:  new                              
           Priority:  normal     |   Milestone:  13.1.0                           
          Component:  kernel     |     Version:  Development build as of this date
         Resolution:             |    Keywords:                                   
        Next_action:  diagnose   |    Verified:  0                                
Deployment_affected:             |   Blockedby:                                   
           Blocking:             |  
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Comment(by Quozl):

 Oh yeah, thanks.

 That leaves the power cycling.  The wakeup method was "aggressive", which
 is a ten second scheduled wake, which due to difficulty getting to sleep
 will be anything from zero to ten seconds suspend time.  I see that in EC
 power.c there is a minimum time that EN_USB_PWR will be off for, if it is
 off.  So I don't see a firmware mechanism for this failure.  I don't think
 we should need to do anything in kernel for it.

 (The schematic page 3 still shows EN_USB_PWR coming from the SoC, but it
 now comes from the EC).

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Ticket URL: <http://dev.laptop.org/ticket/12456#comment:16>
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