#10828 LOW 1.75-so: Accelerometer driver for 1.75

Zarro Boogs per Child bugtracker at laptop.org
Wed Jun 8 19:44:43 EDT 2011


#10828: Accelerometer driver for 1.75
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           Reporter:  cjb           |       Owner:  saadia       
               Type:  task          |      Status:  new          
           Priority:  low           |   Milestone:  1.75-software
          Component:  kernel        |     Version:  not specified
         Resolution:                |    Keywords:               
        Next_action:  add to build  |    Verified:  0            
Deployment_affected:                |   Blockedby:               
           Blocking:  10893, 10914  |  
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Comment(by Quozl):

 Sorry, I described my request incompletely.

 By the time we release a software build, we'll be confident that the
 driver will function with a properly manufactured laptop.  No worries
 there.  I was asking about manufacturing tests.

 In the current manufacturing process, the OpenFirmware runin tests involve
 a human, but the Linux runin tests do not ... except to start and stop the
 whole test.

 The OpenFirmware runin tests will probably verify that the accelerometer
 delivers data.

 The purpose of the Linux runin tests is to detect hardware faults that
 were not present during the OpenFirmware tests, either because
 OpenFirmware could not test them, or because they only appear when driven
 by a Linux kernel, or because of an intermittent condition, or because of
 a deficiency that will only show a fault with elapsed time or thermal
 cycles.

 So can I design a test for some functions of the accelerometer and kernel
 combination that does not depend on movement?  For example, is there a way
 to prove from user space that the accelerometer is still sending new data
 to the kernel?  Is there some expectation of jitter in the coordinates
 that might be relied upon?  Or some data arrival counter?  Hope you can
 see my interest.  ;-)

-- 
Ticket URL: <http://dev.laptop.org/ticket/10828#comment:7>
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