#12785 NORM 13.2.1: siv121c camera support

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#12785: siv121c camera support
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           Reporter:  Quozl        |       Owner:  Quozl               
               Type:  enhancement  |      Status:  new                 
           Priority:  normal       |   Milestone:  13.2.1              
          Component:  kernel       |     Version:  Development firmware
         Resolution:               |    Keywords:                      
        Next_action:  design       |    Verified:  0                   
Deployment_affected:               |   Blockedby:                      
           Blocking:               |  
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Comment(by Quozl):

 SIV121C cannot be used on XO-1.5, because:
  * the sensor maximum clock frequency is 27 MHz,
  * the system USB clock is 48 MHz, generated by U22, the clock generator,
  * the USB clock is inverted by U1 and sent to the sensor.

 The result of sending a 48 MHz clock to the sensor is:
  * it operates outside specification,
  * it hangs,
  * it generates incorrect data (random inversion of horizontal lines).

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Ticket URL: <http://dev.laptop.org/ticket/12785#comment:11>
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