AlexanderVasiljev opened a new pull request #2801:
URL: https://github.com/apache/incubator-nuttx/pull/2801


   Different w25qxxxjv chips has different protect bits (3 or 4 bits) and 
different address lengths (3 or 4 bytes).
   
   ## Testing
   
   Tested with w25q256jv on stm32H743.
   
   fstest 
   ```
   End of loop memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       cd850    cd850
   ordblks         4        4
   mxordblk    75600    75600
   uordblks    2a3c0    2a3f0
   fordblks    a3490    a3460
   
   Final memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       cd850    cd850
   ordblks         4        4
   mxordblk    75600    75600
   uordblks    2a3c0    2a3c0
   fordblks    a3490    a3490
   ```
   
   ```
   nsh>smart_test -s 100 /mnt/log0
   Creating file /mnt/log0 for write mode
   Writing test data.  2000 lines to write
   1999
   Done.
   Performing 100 random seek tests
   100
   Append test passed
   Creating circular log with 40000 records
   Performing 0 circular log record update tests
   
   Pass
   ```


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