#11288 NORM 1.75-so: XO-1.75 accelerometer chip change

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#11288: XO-1.75 accelerometer chip change
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           Reporter:  Quozl         |       Owner:  Quozl        
               Type:  task          |      Status:  assigned     
           Priority:  normal        |   Milestone:  1.75-software
          Component:  kernel        |     Version:               
         Resolution:                |    Keywords:               
        Next_action:  add to build  |    Verified:  0            
Deployment_affected:                |   Blockedby:               
           Blocking:                |  
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Changes (by Quozl):

  * owner:  saadia => Quozl
  * status:  new => assigned
  * next_action:  design => add to build


Comment:

 A [http://dev.laptop.org/git/olpc-
 kernel/commit/?h=arm-3.0-wip&id=d2489a3d86369500cd9b4d099d87179f92c023a8
 patch] was pushed by Saadia.

 Tested here fine on two units using /runin/runin-accelerometer with os883.

 One instance of ''list3: power on failure'' always seems to occur, but it
 does not affect data flow.

 User space read rate 25 vector triplets per second.  This is inconsistent
 with the read rate of 100 vector triplets per second we're able to achieve
 under OpenFirmware.  This has not changed.  But I don't think it is
 important enough to investigate.

 Consecutive vector analysis is consistent with a 50 Hz sample rate on the
 device.  This is as expected.

 Other device sample rates tested fine.  The kernel driver does not
 synchronise the reading of samples against the status register data
 available or overrun bits.  This is as expected based on the previous
 driver.  Again, not important enough to investigate further.

 Please add kernel to build.

-- 
Ticket URL: <http://dev.laptop.org/ticket/11288#comment:5>
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