Patch set 1:Code-Review +2
1 comment:
the keyboard also sends the result
of the self test (passed/failed)
That is what I found in the keyboard controller implementation of Chrome EC as well (i.e. it sends OK twice after the ACK). However, I could not trace the history of why it was done or any documentation to support it. I found this ancient document [1] and its abridged version [2] that indicate reset sends back ACK but does not talk about OK/FAIL response. If you run into any code comments/document that talk about the passed/failed response, I would love to add it to my references. Thanks!
[1] http://bitsavers.trailing-edge.com/pdf/ibm/pc/at/1502494_PC_AT_Technical_Reference_Mar84.pdf
[2] http://zet.aluzina.org/images/d/d4/8042.pdf
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