arch/xtensa/esp32[-s2|-s3]: Refactor PM support

[eren-terzioglu]

Summary

• Documentation/xtensa/esp32[-s2]: Add PM docs

Add PM docs for esp32s2

• boards/xtensa/esp32[-s2|-s3]: Refactor PM board layer

Refactor PM board layer for Xtensa based Espressif devices

• arch/xtensa/esp32[-s2|-s3]: Refactor PM support

Refactor PM modes for Xtensa based Espressif devices

Impact

Impact on user: Yes, users can use light sleep and deep sleep with different wakeup modes (ext0, gpio, ext1)

Impact on build: No

Impact on hardware: PM mode supported for esp32s2

Impact on documentation: Yes, newly added config docs added

Impact on security: No

Impact on compatibility: No

Testing

Building

Used configs:

esp32s2-saola-1:pm
esp32s3-devkit:pm

make -j distclean && ./tools/configure.sh esp32s2-saola-1:pm && make -j && make download ESPTOOL_PORT=/dev/ttyUSB0 ESPTOOL_BAUD=921600 ESPTOOL_BINDIR=./

Running

To let device into light-sleep mode, these commands applied:

nsh> pmconfig relax idle
nsh> pmconfig relax normal
nsh> pmconfig relax normal

To let device into deep-sleep mode, these commands applied:

nsh> pmconfig relax standby
nsh> pmconfig relax idle
nsh> pmconfig relax normal
nsh> pmconfig relax normal

Results

After these commands applied, device will stop responding to nsh and after a while it will start responding. On deep sleep, device should reset with DSLEEP or SLEEP_WAKEUP reset reason