michallenc opened a new pull request, #17389:
URL: https://github.com/apache/nuttx/pull/17389

   ## Summary
   This commit adds support for `SPI_SETDELAY` operation on SAMv7 QSPI 
peripheral running in SPI mode. The logic is the same as for standard SPI 
peripheral, just different registers. The change allows to set custom delays 
between transfers, chip selects and so on.
   
   ## Impact
   
   None on current implementations with `CONFIG_SPI_DELAY_CONTROL` disabled. If 
enabled, it allows to set SPI delays
   based on the device settings.
   
   ## Testing
   
   Tested against W25 SPI NOR flash on a custom SAMv7 board. Flash had SmartFS 
partition and three partitions for NXboot. The update and confirmation process 
was significantly slower because of default large delay between consecutive 
transfers. The speed is as expected with the delays set to zero. The needed 
change in W25 driver is in #17388 17388
   


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