#12216 NORM 13.1.0: XO-1.75/XO4 don't support 1.8 volt SD cards

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#12216: XO-1.75/XO4 don't support 1.8 volt SD cards
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           Reporter:  jvonau     |       Owner:  cjb                     
               Type:  defect     |      Status:  assigned                
           Priority:  normal     |   Milestone:  13.1.0                  
          Component:  kernel     |     Version:  Software Build 12.1.0-21
         Resolution:             |    Keywords:                          
        Next_action:  never set  |    Verified:  0                       
Deployment_affected:             |   Blockedby:                          
           Blocking:             |  
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Changes (by cjb):

 * cc: pgf (added)


Comment:

 Thanks, Wad.  The bug title's confusing: all we're trying to do at the
 moment is control the 3.3V supply to the external SD so that we can reset
 it correctly.

 The EC command to do that isn't documented in
 http://wiki.laptop.org/go/XO_1.75_HOST_to_EC_Protocol.

 Paul, please could you tell us which EC command to use to control
 EN_SD2_PWR#?

 Dan, I guess we'll need a new platform hook to perform the reset in MMC.

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Ticket URL: <http://dev.laptop.org/ticket/12216#comment:9>
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