thiagofinelon opened a new pull request, #16878:
URL: https://github.com/apache/nuttx/pull/16878
## Summary
This PR adds **EXT1 wakeup support** to the ESP32-S3 power management
subsystem.
It enables the ESP32-S3 to wake from **PM_STANDBY** or **PM_SLEEP** using
one or more RTC GPIOs as external wakeup sources.
Changes include:
- EXT1 wakeup configuration and preparation logic added to `esp32s3_rtc.c`.
- Integrated EXT1 handling into `esp32s3_pm.c` (`pmstandby()` and
`pmsleep()`).
- New **board-level Kconfig options** exposed under ESP32-S3 DevKit menu:
- `CONFIG_PM_EXT1_WAKEUP`: enable EXT1 wakeup support
- `CONFIG_PM_EXT1_WAKEUP_RTC_GPIO<n>`: select RTC GPIOs as EXT1 wake
sources
- `CONFIG_PM_EXT1_WAKEUP_TRIGGER_MODE`: choose wakeup on HIGH or LOW level
This is the first external wakeup method supported by ESP32-S3 PM
(EXT0 is not implemented in this port).
## Impact
- **Build impact**: None unless `CONFIG_PM_EXT1_WAKEUP` is enabled.
- **Runtime impact**: When enabled, ESP32-S3 can wake from light or deep
sleep
on external RTC GPIO triggers.
- **API impact**: No new public API; configuration is managed via board
Kconfig.
- **Area impacted**: ESP32-S3 PM subsystem and board configuration menus.
## Testing
- Built with `xtensa-esp32s3-elf-gcc` toolchain on Linux host.
- Verified build passes with and without `CONFIG_PM_EXT1_WAKEUP` enabled.
- Tested on ESP32-S3 DevKit:
- Enabled `PM EXT1 Wakeup` in board Kconfig.
- Configured GPIO4 and GPIO5 as EXT1 wake sources.
- Entered light sleep, confirmed wakeup on GPIO trigger.
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