Silabs 2025.12 sdks

[sarthak shaha (Sarthak-Shaha)]

Problem / Feature

Update generated files and sdk-copies to support SiSDK 2025.12.0. This is the companion PR to connectedhomeip PR #42981 which bumps the matter_support submodule.

Summary

1. generate_boards.py

• Removed the legacy _configure_sdk() function (the slc configuration --sdk + slc signature trust --sdk trust mechanism required by older SLC versions).
• Added --sdk-package-path flag to the slc generate command, as required by SLC spec 14 (bundled with SiSDK 2025.12).
• Added cmake_gcc/ and config/btconf/ to the list of directories cleaned up after generation.
• Regenerated all board files using the updated script.

2. sdk-copies/ Library Cleanup

Removed pre-built libraries that are now sourced directly from SiSDK in the main Matter SDK. The project no longer needs these copies in matter_support:

• RAIL libraries (32 .a files) -- All librail_config_*, librail_*_release.a variants for EFR32xg24/xg26 and MGM240 modules (GCC and IAR).
• Bluetooth libraries (19 .a files) -- libbgcommon.a, liblinklayer.a (x301/xg24/xg26), libbgapi_core.a, all libble_host_*.a and libble_bgapi_*.a variants, libbondingdb*.a, libble_system.a.
• OpenThread library (1 .a file) -- libsl_openthread_cm33_gcc.a.
• OpenThread radio abstraction -- radio.c removed from sdk-copies/protocol/openthread/platform-abstraction/efr32/ and radio.cpp added at sdk-copies/openthread/platform-abstraction/efr32/ (C to C++ conversion, path updated to match new SiSDK layout).

Remaining files in sdk-copies/ are still needed and can be further optimized in future iterations.

3. Board-Support Regeneration

All board-support files regenerated for 21 boards across EFR32MG24, EFR32MG26, MGM24, and SiWx917 families:

EFR32MG24: BRD2601B, BRD2703A, BRD4186A, BRD4186C, BRD4187A, BRD4187C
EFR32MG26: BRD2608A, BRD4116A, BRD4117A, BRD4118A
MGM24: BRD2704A, BRD4316A, BRD4317A, BRD4318A, BRD4319A
SiWx917: BRD2605A, BRD2708A, BRD2911A, BRD4338A, BRD4342A, BRD4343A

Key changes across boards:

• New files: pin_config.h and matter-platform.pintool added to all EFR32/MGM24 boards. sl_rail_util_pa_tables_config.h added to several boards.
• Removed files: Board-specific headers (brd4186c.h, brd4187c.h), SPI driver config (sl_spidrv_eusart_exp_config.h), SLC state artifacts.
• Updated configs: sl_openthread_features_config.h (substantial update), psa_crypto_config.h, sl_bluetooth_config.h, sl_btctrl_config.h, sl_board_control_config.h, sl_power_manager_config.h, sl_mbedtls_config.h, sl_memory_manager_config.h, sl_event_handler.c, sl_bluetooth.c, and others.
• SiWx917 boards: Lighter changes to sl_event_handler.h, sli_mbedtls_config_autogen.h, and sl_wifi_region_db_config.h.

4. WiFi NCP SPI Driver Files

Copied over spidrv* files for BRD4187C and BRD4186C. These files were obtained by generating a project using WiFi NCP configuration.

Testing

Matter SDK CI run: https://github.com/SiliconLabsSoftware/matter_sdk/actions/runs/22472070730/job/65090971886

[Junior Martinez (jmartinez-silabs)]

See my comments. They apply to all files.
The files to focus for the curated/hand picked changes are

sl_component_catalog.h
sl_event_handler.c‎
sli_mbedtls_config_autogen.h
sli_psa_builtin_config_autogen.h
sli_psa_config_autogen.h

[lpbeliveau-silabs]

Approved with resolution of the sl_spidrv includes and removal of the .pintool file unless a usecase is identified.

[sarthak shaha (Sarthak-Shaha)]

Merging and updating submodule in CSA project-chip/connectedhomeip#42981 pr