Re: [Trac #1475] CAFÉ camera doesn't power down

Zarro Boogs per Child bugtracker at laptop.org
Mon May 14 15:17:41 EDT 2007


#1475: CAFÉ camera doesn't power down
---------------------+------------------------------------------------------
  Reporter:  dwmw2   |       Owner:  corbet   
      Type:  defect  |      Status:  assigned 
  Priority:  high    |   Milestone:  BTest-4  
 Component:  kernel  |     Version:  Build 406
Resolution:          |    Keywords:           
---------------------+------------------------------------------------------
Comment (by wmb at firmworks.com):

 The "General Purpose I/O Register" at offset 0x315c controls the
 directions of the GPIO pins.  Setting a GPIO bit to input mode will
 prevent it from driving the output actively high, and the signal will
 eventually float low.

 It is better to leave the bit set for output mode, and use register 3038
 to drive it actively low (value 0) or actively high (value 8).

-- 
Ticket URL: <http://dev.laptop.org/ticket/1475#comment:5>
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