v01d commented on pull request #2039:
URL: https://github.com/apache/incubator-nuttx/pull/2039#issuecomment-714189550


   Thanks @Donny9 
   Yes, of course I don't mean that you should port every driver. I meant that 
without looking into various drivers it is difficult to know whether this 
sensor model works in all cases. If we are flexible on this implementation 
indeed this could be merged and then improve it depending on each case.
   
   Regarding direct read, I'm not sure if we're talking about the same thing. I 
wasn't suggesting that you should be able to read I2C registers directly. I was 
suggesting that the lower part should be able to write into the pointer that 
read() receives directly. The push_event() interface means that this would not 
be possible. The only way would be that the upper part be able to *request* 
data from the lower part (something like read_sensor(), which would receive a 
pointer where to read into). This could be a blocking operation, compatible 
with blocking read. I think it would be good to consider such simple case as an 
option. It could also be done via signaling (the lower part could invoke a 
upper half method to signal that new data is available).


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