eren-terzioglu opened a new pull request, #18166:
URL: https://github.com/apache/nuttx/pull/18166
## Summary
SPI3 initialization issues and SPI DMA build errors fixed
* Docs/platforms/espressif: Add SPI docs for esp32s2
Add SPI defconfig docs for esp32s2-saola-1
* boards/xtensa/esp32s2: Add SPI defconfig
Add spi defconfig and SPI3 initializer for esp32s2
* arch/xtensa: Fix esp32s2 SPI errors
Fix esp32s2 SPI DMA and SPI3 errors
## Impact
Impact on user: Yes, esp32s2 SPI issues fixed
Impact on build: No
Impact on hardware: Yes, bugfix applied for esp32s2 spi
Impact on documentation: Yes, doc for defconfig added
Impact on security: No
Impact on compatibility: No
## Testing
`esp32s2-saola-1:spi` config used to build
### Building
```
make -j distclean && ./tools/configure.sh esp32s2-saola-1:spi && make -j &&
make download ESPTOOL_PORT=/dev/ttyUSB0 ESPTOOL_BAUD=921600 ESPTOOL_BINDIR=./
```
### Running
GPIO11 and GPIO13 pins connected with a cable to test and run `spi exch AB`
command
### Results
```
nsh> spi exch AB
Sending: AB
Received:AB
```
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