#9739 HIGH 1.5-sof: need to move to SDIO 1 bit mode during suspend

[Zarro Boogs per Child]

#9739: need to move to SDIO 1 bit mode during suspend
------------------------------+---------------------------------------------
           Reporter:  dsd     |       Owner:  dsaxena                           
               Type:  defect  |      Status:  new                               
           Priority:  high    |   Milestone:  1.5-software                      
          Component:  kernel  |     Version:  Development source as of this date
         Resolution:          |    Keywords:                                    
        Next_action:  code    |    Verified:  0                                 
Deployment_affected:          |   Blockedby:                                    
           Blocking:          |  
------------------------------+---------------------------------------------

Comment(by wad):

 Replying to [comment:4 dsaxena]:
 > and for future upstream we may want a quirk to check as the 1b on
 suspend issue is specific to the host controller we are using.

 This isn't a host controller quirk, it is part of the proprietary SDIO
 spec that none of us have seen.

 It makes sense actually.  Since the interrupt line is also a data line in
 4b mode, the controller/device need the clock to synchronize the state
 machines that tells whether it is currently being used as interrupt or
 data.   In 1b mode, the interrupt line is dedicated to interrupts.

-- 
Ticket URL: <http://dev.laptop.org/ticket/9739#comment:7>
One Laptop Per Child <http://laptop.org/>
OLPC bug tracking system