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    • Matt Spinler's avatar
      Change wspoon GPU overtemp polling to 500ms · d3ef5cbe
      Matt Spinler authored
      
      
      For the Witherspoon system, reduce the polling interval
      for the GPU overtemp condition detected by the UCD90160
      power sequencer from 1s to 500ms.
      
      This is done to improve fault isolation, as well as HW safety,
      as the the GPU will turn itself off after 1s of an overtemp
      so the code may detect a PGOOD fault instead if it doesn't
      catch it in time.
      
      The GPU spec also says to shut off all power on an overtemp
      as soon as possible to prevent HW damage caused by other
      connected GPUs still trying to talk to the faulted one.
      This change will shorten that time, as a hard power off is
      already issued after an overtemp is detected.
      
      Resolves openbmc/openbmc#2719
      
      Change-Id: I1146abfd38e75ec9e9c9fd4f83fe3a9b68c0bd89
      Signed-off-by: default avatarMatt Spinler <spinler@us.ibm.com>
      d3ef5cbe
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