#12461 NORM 4-firmw: SKU295 hangs on resume if a LiFePO4 battery is being charged

[Zarro Boogs per Child]

#12461: SKU295 hangs on resume if a LiFePO4 battery is being charged
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           Reporter:  Quozl                |       Owner:  rsmith                           
               Type:  defect               |      Status:  new                              
           Priority:  normal               |   Milestone:  4-firmware                       
          Component:  embedded controller  |     Version:  Development build as of this date
         Resolution:                       |    Keywords:                                   
        Next_action:  diagnose             |    Verified:  0                                
Deployment_affected:                       |   Blockedby:                                   
           Blocking:                       |  
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Comment(by pgf):

 for me, this hang on SKU295 is most trivially reproduced (assuming you
 have EC serial) by putting the SoC into suspend, and typing 'q 2000' at
 the EC prompt.  this causes a 2000 loop (just under 20ms) EC_IRQ pulse,
 but doesn't in and of itself cause any other EC activity.  (other EC
 events will cause this pulse, plus protocol activity)

 using the unit that wad and i have been passing back and forth the last
 couple of days, this hang is reliable.

 current loaded module list:  (i.e., no mwifiex, no btmrvl, no mmp_camera,
 no camera sensor)
 {{{
 fuse                   68028  2
 xt_tcpudp               2713  3
 iptable_filter          1079  1
 ip_tables              10234  1 iptable_filter
 x_tables               13306  3 ip_tables,xt_tcpudp,iptable_filter
 mousedev                9501  0
 uinput                  6978  3
 joydev                  9067  0
 psmouse                48687  0
 fb_sys_fops             1081  0
 sysimgblt               1761  0
 zforce                 18355  0
 sysfillrect             2999  0
 syscopyarea             2645  0
 sisusbvga              46344  0
 ov7670                  8899  0
 }}}

 last console traffic is:
 {{{
 [  129.360158] before suspend
 [  129.363181] mmp3_pm_enter_d2 7
 [  129.367196] mmp3_pm_enter_d2 8
 [  129.370241] mmp3_pm_enter_d2 9
 }}}

 SOC_SLEEP does drop, however, as reported by the EC (which is to say, the
 power led comes back on).

-- 
Ticket URL: <http://dev.laptop.org/ticket/12461#comment:9>
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