xtensa/espressif: Update common-source integration for Xtensa devices

[tmedicci]

Summary

Following #18492, this PR updates the common-source integration for Xtensa-based
Espressif devices (ESP32, ESP32-S2, and ESP32-S3). This is part of a larger common-source update split by architecture for better maintainability.

Major components updated:

• IRQ allocator refactoring with intr_alloc integration
• Common-source drivers (GPIO, RMT, I2C, SPI, UART, etc.)
• Espressif components upgrade to release/master.b-test, just like it was done for Espressif's RISC-V-based devices.
• Peripheral drivers (ADC, PWM, LEDC, MCPWM, PCNT, Temperature Sensor, etc.)
• Wireless adapters (Wi-Fi and BLE)
• esp_timer migration to the common-source path for Xtensa devices
• Common-source power management implementation (auto-sleep and wakeup paths)
• Board defconfigs for all Xtensa Espressif boards
• SMP support improvements for ESP32-S3
• Critical section handling improvements

Key architectural changes:

• IRQ Allocator: The new interrupt allocator enables multiple mapping options from interrupt sources to CPU interrupts, providing flexibility required by modern peripherals. Although this introduces breaking changes to the interrupt handling API, the required ARCH_MINIMAL_VECTORTABLE Kconfig option is explicitly checked during startup to ensure proper configuration. This validation prevents runtime issues from configuration mismatches.
• Xtensa-specific interrupt handling via esp_xtensa_intr.c providing NuttX-native implementations of xt_ints_on/off and interrupt handlers, avoiding conflicts with NuttX's core Xtensa macros.
• Timer/RTC unification: ESP32/ESP32-S2/ESP32-S3 move from chip-specific RTC/RT-timer code to common-source Espressif integration, including esp_timer_adapter/esp_rtc paths and the required bringup/defconfig updates.
• Power management consolidation: Xtensa PM follows the common-source implementation, including common-source auto-sleep behavior, UART/Wi-Fi wakeup coordination, and tickless-safe sleep flow compatibility.

Note: This is a large commit to maintain bisectability. Breaking the changes into smaller commits would result in non-building intermediate states across the common-source infrastructure update.

Note to the Reviewers:

Although it's a huge PR, reviewing it is not that difficult. Some key points can be summarized here:

• Peripherals' changes (nuttx/arch/xtensa/src/common/espressif/) are mostly related to either path changes and the new IRQ allocator.
• Exceptions are:
  • The RMT peripheral, which required a refactor to be fully compatible with the new common-source base (deprecated code was removed) and the espXX_rt_timer, which was moved to a common-source approach. Public API's didn't change.
• defconfigs were updated to be compatible with the new IRQ allocator. Although it is a breaking change from user's perspective, the required Kconfig-selectable options are checked at arch/xtensa/src/common/espressif/esp_irq.c

Impact

Impact on user: Yes, they need to update their defconfig to select the following Kconfig:

CONFIG_ARCH_IRQ_TO_NDX=y
CONFIG_ARCH_MINIMAL_VECTORTABLE_DYNAMIC=y
CONFIG_ARCH_NUSER_INTERRUPTS=2

Please note that these options are checked with pre-processor macros, so it can't be "left behind".

Impact on build: Yes. Build will fail if the newer Kconfig options aren't selected.

Impact on hardware: Yes. This change is mandatory to support newer Espressif devices on NuttX.

Impact on documentation: No.

Impact on security: No.

Impact on compatibility: Yes, this is a breaking change with minor effects. The missing Kconfig options are checked with pre-processor macros and guide the user to select the required configs.

Testing

All Espressif's defconfigs were tested with hardware in the loop. In addition to peripherals' testing, ostest is checked too

Building

Cleaning Existing Builds

make -j distclean

Select either ESP32, ESP32-S2 or ESP32-S3

ESP32

./tools/configure.sh -S esp32-devkitc:ostest

ESP32-S2

./tools/configure.sh -S esp32s2-saola-1:ostest

ESP32-S3

./tools/configure.sh -S esp32s3-devkit:ostest

Building and Flashing

make flash -s -j$(nproc) && picocom -b 115200 /dev/ttyUSB0

Running

nsh> ostest

Results

ostest_main: Exiting with status 0