michallenc opened a new pull request #4288:
URL: https://github.com/apache/incubator-nuttx/pull/4288


   ## Summary
   This commit adds two new IOCTL commnands for ADC driver. Command 
ANIOC_RESET_FIFO resets FIFO head and tail which causes the driver to wait for 
the new data to be received. Calling this command before reading ADC data in 
user space ensures that the read data are newly sampled.
   
   Command ANIOC_SAMPLES_ON_READ return the number of read channels in the 
buffer. This can be useful in nonblocking mode when the application needs to 
get the samples received before the app was started.
   
   Both IOCTL commands are used only in generic driver section only and do not 
have any effect on existing architecture specific drivers.
   
   ## Impact
   ADC driver, no impact for current applications.
   
   ## Testing
   Tested on Teensy 4.1
   


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