Zephyr 4.3.0 (Working Draft)

We are pleased to announce the release of Zephyr version 4.3.0.

Major enhancements with this release include:

USB Device “Next” stack is now the default

The new USB device stack, built on the modern UDC (USB Device Controller) API, replaces the legacy stack and brings support for multiple simultaneous controllers, runtime configuration, and overall better architecture. The legacy stack is now deprecated and will be removed in Zephyr 4.5.

CPU load and dynamic frequency scaling subsystems

A new experimental CPU frequency scaling subsystem enables dynamic, policy-driven, clock adjustments to balance power consumption and performance. Alongside it, a new CPU load subsystem allows to obtain CPU usage metrics based on scheduler statistics, which can be used to drive the frequency scaling policy.

Instrumentation Subsystem

A new instrumentation subsystem simplifies tracing and profiling of Zephyr applications by leveraging compiler-managed function instrumentation, allowing to record call-graph traces and statistical profiles at runtime.

OCPP 1.6 library

A new OCPP (Open Charge Point Protocol) library enables EV charging station development with Zephyr. The library implements OCPP 1.6 Charge Point functionality over WebSocket, supporting core profile operations including authorization, transaction management, and meter value reporting for communication with Central System servers.

Twister Display Harness

Twister can now validate on-target display output by capturing frames from a USB video camera and matching them against pre-recorded visual “fingerprints”.

Developer Experience Improvements

Several new tools have been introduced to help with common development and troubleshooting tasks:

• Devicetree diagnostics (dtdoctor) to help diagnose Devicetree build errors.

• traceconfig build target to help understand where Kconfig symbols come from and their final values.

• Interactive footprint charts to visualize RAM/ROM usage of an application.

Expanded Board Support

Support for 105 new boards and 39 new shields has been added in this release.

An overview of the changes required or recommended when migrating your application from Zephyr v4.2.0 to Zephyr v4.3.0 can be found in the separate migration guide.

The following sections provide detailed lists of changes by component.

Security Vulnerability Related

The following CVEs are addressed by this release:

• CVE 2025-9408: Under embargo until 2025-11-10

• CVE 2025-9557: Under embargo until 2025-11-24

• CVE 2025-9558: Under embargo until 2025-11-24

• CVE 2025-12035: Under embargo until 2025-12-13

More detailed information can be found in: https://docs.zephyrproject.org/latest/security/vulnerabilities.html

API Changes

• Crypto

  • The input buffer in hash_pkt is now constant

Removed APIs and options

• The TinyCrypt library was removed as the upstream version is no longer maintained. PSA Crypto API is now the recommended cryptographic library for Zephyr.

• The legacy pipe object API was removed. Use the new pipe API instead.

• bt_le_set_auto_conn

• CONFIG_BT_BUF_ACL_RX_COUNT

• ok enum value has now been removed completely from base.yaml binding status property in devicetree.

• STM32 LPTIM clock source selection through Kconfig was removed. Device Tree must now be used instead. Affected Kconfig symbols: CONFIG_STM32_LPTIM_CLOCK_LSI / CONFIG_STM32_LPTIM_CLOCK_LSI

Deprecated APIs and options

• maxim,ds3231 is deprecated in favor of maxim,ds3231-rtc.

• Providing a third argument to SPI_CONFIG_DT, SPI_CONFIG_DT_INST, SPI_DT_SPEC_GET, SPI_DT_SPEC_INST_GET is deprecated. Providing a second argument to SPI_CS_CONTROL_INIT is deprecated. Use new DT properties spi-cs-setup-delay-ns and spi-cs-hold-delay-ns to specify delay instead.

• bt_hci_bus was deprecated as it was not used. BT_DT_HCI_BUS_GET should be used instead.

• CONFIG_BT_AUTO_PHY_UPDATE was deprecated and has been replaced with role-specific (central vs peripheral) options that allow specifying exactly which PHY is preferred for automatic updates.

• CONFIG_POSIX_READER_WRITER_LOCKS is deprecated. Use CONFIG_POSIX_RW_LOCKS instead.

• CONFIG_JWT_SIGN_RSA_LEGACY is deprecated. Please switch to the PSA Crypto API based alternative (i.e. CONFIG_JWT_SIGN_RSA_PSA).

• RISCV’s CONFIG_EXTRA_EXCEPTION_INFO is deprecated. Use CONFIG_EXCEPTION_DEBUG instead.

New APIs and options

• Architectures

  • CONFIG_ARCH_HAS_HW_SHADOW_STACK

  • CONFIG_SRAM_SW_ISR_TABLE

  • x86 Intel CET support

    • CONFIG_X86_CET

    • CONFIG_X86_CET_IBT

    • CONFIG_X86_CET_SHADOW_STACK_ALIGNMENT

    • CONFIG_X86_CET_SOC_PREPARE_SHADOW_STACK_SWITCH

    • CONFIG_X86_CET_VERIFY_KERNEL_SHADOW_STACK

  • ARM (Cortex-M) system state save/restore primitives

    • z_arm_save_scb_context() / z_arm_restore_scb_context()

    • z_arm_save_mpu_context() / z_arm_restore_mpu_context()

    • Existing z_arm_save_fp_context() and z_arm_save_fp_context() have also been updated

  • Xtensa

    • CONFIG_XTENSA_HIFI_SHARING_MODEL

    • CONFIG_XTENSA_EAGER_HIFI_SHARING

    • CONFIG_XTENSA_LAZY_HIFI_SHARING

    • CONFIG_XTENSA_EXCEPTION_ENTER_GDB

• Bluetooth

  • Audio

    • bt_audio_codec_cfg now contains a target_latency and a target_phy option

    • bt_bap_broadcast_source_foreach_stream()

    • bt_cap_initiator_broadcast_foreach_stream()

    • bt_bap_stream now contains an iso field as a reference to the ISO channel

    • bt_bap_unicast_group_get_info()

    • bt_cap_unicast_group_get_info()

    • bt_bap_unicast_client_unregister_cb()

  • Host

    • bt_iso_unicast_info now contains a cig_id and a cis_id field

    • bt_iso_broadcaster_info now contains a big_handle and a bis_number field

    • bt_iso_sync_receiver_info now contains a big_handle and a bis_number field

    • bt_le_ext_adv_info now contains an sid field with the Advertising Set ID.

    • CONFIG_BT_AUTO_PHY_PERIPHERAL_NONE

    • CONFIG_BT_AUTO_PHY_PERIPHERAL_1M

    • CONFIG_BT_AUTO_PHY_PERIPHERAL_2M

    • CONFIG_BT_AUTO_PHY_PERIPHERAL_CODED

    • CONFIG_BT_AUTO_PHY_CENTRAL_NONE

    • CONFIG_BT_AUTO_PHY_CENTRAL_1M

    • CONFIG_BT_AUTO_PHY_CENTRAL_2M

    • CONFIG_BT_AUTO_PHY_CENTRAL_CODED

• CPUFreq

  • Introduced experimental dynamic CPU frequency scaling subsystem

    • CONFIG_CPU_FREQ

• Cellular

  • CELLULAR_EVENT_MODEM_COMMS_CHECK_RESULT

• Crypto

  • CONFIG_MBEDTLS_PSA_CRYPTO_BUILTIN_KEYS

• Display

  • PIXEL_FORMAT_AL_88

  • SDL

    • CONFIG_SDL_DISPLAY_DEFAULT_PIXEL_FORMAT_AL_88

    • CONFIG_SDL_DISPLAY_COLOR_TINT

• Haptics

  • CONFIG_HAPTICS_SHELL

• Instrumentation subsystem

  • Introduced instrumentation subsystem

    • CONFIG_INSTRUMENTATION

    • CONFIG_INSTRUMENTATION_MODE_CALLGRAPH

    • CONFIG_INSTRUMENTATION_MODE_CALLGRAPH_BUFFER_SIZE

    • CONFIG_INSTRUMENTATION_MODE_CALLGRAPH_BUFFER_OVERWRITE

    • CONFIG_INSTRUMENTATION_MODE_STATISTICAL

    • CONFIG_INSTRUMENTATION_MODE_STATISTICAL_MAX_NUM_FUNC

    • CONFIG_INSTRUMENTATION_MODE_STATISTICAL_MAX_CALL_DEPTH

    • CONFIG_INSTRUMENTATION_TRIGGER_FUNCTION

    • CONFIG_INSTRUMENTATION_STOPPER_FUNCTION

    • CONFIG_INSTRUMENTATION_EXCLUDE_FUNCTION_LIST

    • CONFIG_INSTRUMENTATION_EXCLUDE_FILE_LIST

    • instr_header

    • instr_event_context

    • instr_record

    • instr_tracing_supported()

    • instr_profiling_supported()

    • instr_fundamentals_initialized()

    • instr_init()

    • instr_initialized()

    • instr_enabled()

    • instr_enable()

    • instr_disable()

    • instr_turn_on()

    • instr_turn_off()

    • instr_turned_on()

    • instr_trace_enabled()

    • instr_profile_enabled()

    • instr_dump_buffer_uart()

    • instr_dump_deltas_uart()

    • instr_event_handler()

    • instr_set_trigger_func()

    • instr_set_stop_func()

    • instr_get_trigger_func()

    • instr_get_stop_func()

• Kernel

  • CONFIG_HW_SHADOW_STACK

  • CONFIG_HW_SHADOW_STACK_ALLOW_REUSE

  • CONFIG_HW_SHADOW_STACK_MIN_SIZE

  • CONFIG_HW_SHADOW_STACK_PERCENTAGE_SIZE

  • K_THREAD_HW_SHADOW_STACK_SIZE

  • K_KERNEL_HW_SHADOW_STACK_DECLARE

  • K_KERNEL_HW_SHADOW_STACK_ARRAY_DECLARE

  • K_THREAD_HW_SHADOW_STACK_DEFINE

  • K_THREAD_HW_SHADOW_STACK_ARRAY_DEFINE

  • K_THREAD_HW_SHADOW_STACK_ATTACH

  • k_thread_hw_shadow_stack_attach

• LVGL (Light and Versatile Graphics Library)

  • CONFIG_LV_Z_MEMORY_POOL_ZEPHYR_REGION

  • CONFIG_LV_Z_MEMORY_POOL_ZEPHYR_REGION_NAME

  • CONFIG_LV_Z_VDB_ZEPHYR_REGION

  • CONFIG_LV_Z_VDB_ZEPHYR_REGION_NAME

• Logging:

  • CONFIG_LOG_BACKEND_SWO_SYNC_PACKETS

  • Added options to skip timestamp and level in log backends.

    • CONFIG_LOG_BACKEND_SHOW_TIMESTAMP

    • CONFIG_LOG_BACKEND_SHOW_LEVEL

  • Added rate-limited logging macros to prevent log flooding when messages are generated frequently.

    • LOG_ERR_RATELIMIT - Rate-limited error logging macro (convenience)

    • LOG_WRN_RATELIMIT - Rate-limited warning logging macro (convenience)

    • LOG_INF_RATELIMIT - Rate-limited info logging macro (convenience)

    • LOG_DBG_RATELIMIT - Rate-limited debug logging macro (convenience)

    • LOG_HEXDUMP_ERR_RATELIMIT - Rate-limited error hexdump macro (convenience)

    • LOG_HEXDUMP_WRN_RATELIMIT - Rate-limited warning hexdump macro (convenience)

    • LOG_HEXDUMP_INF_RATELIMIT - Rate-limited info hexdump macro (convenience)

    • LOG_HEXDUMP_DBG_RATELIMIT - Rate-limited debug hexdump macro (convenience)

    • LOG_ERR_RATELIMIT_RATE - Rate-limited error logging macro (explicit rate)

    • LOG_WRN_RATELIMIT_RATE - Rate-limited warning logging macro (explicit rate)

    • LOG_INF_RATELIMIT_RATE - Rate-limited info logging macro (explicit rate)

    • LOG_DBG_RATELIMIT_RATE - Rate-limited debug logging macro (explicit rate)

    • LOG_HEXDUMP_ERR_RATELIMIT_RATE - Rate-limited error hexdump macro (explicit rate)

    • LOG_HEXDUMP_WRN_RATELIMIT_RATE - Rate-limited warning hexdump macro (explicit rate)

    • LOG_HEXDUMP_INF_RATELIMIT_RATE - Rate-limited info hexdump macro (explicit rate)

    • LOG_HEXDUMP_DBG_RATELIMIT_RATE - Rate-limited debug hexdump macro (explicit rate)

• Management

  • hawkBit

    • CONFIG_HAWKBIT_REBOOT_NONE

    • CONFIG_HAWKBIT_CONFIRM_IMG_ON_INIT

    • CONFIG_HAWKBIT_ERASE_SECOND_SLOT_ON_CONFIRM

  • MCUmgr

    • CONFIG_MCUMGR_TRANSPORT_UDP_DTLS

    • CONFIG_MCUMGR_GRP_IMG_ALLOW_CONFIRM_NON_ACTIVE_SLOT

• Modem

  • CONFIG_MODEM_DEDICATED_WORKQUEUE

• NVMEM

  • Introduced Non-Volatile Memory (NVMEM) subsystem

    • CONFIG_NVMEM

    • CONFIG_NVMEM_EEPROM

    • nvmem_cell

    • nvmem_cell_read()

    • nvmem_cell_write()

    • nvmem_cell_is_ready()

    • NVMEM_CELL_GET_BY_NAME - and variants

    • NVMEM_CELL_GET_BY_IDX - and variants

• Networking

  • CoAP

    • coap_client_response_data

    • coap_client_request.payload_cb

  • Sockets

    • zsock_listen() now implements the backlog parameter support. The TCP server socket will limit the number of pending incoming connections to that value.

• Newlib

  • CONFIG_NEWLIB_LIBC_USE_POSIX_LIMITS_H

• Opamp

  • Introduced opamp device driver APIs selected with CONFIG_OPAMP. It supports initial configuration through Devicetree and runtime configuration through vendor specific APIs.

  • Added support for NXP OPAMP nxp,opamp.

  • Added support for NXP OPAMP_FAST nxp,opamp_fast.

• Power management

  • pm_device_driver_deinit()

  • CONFIG_PM_DEVICE_RUNTIME_DEFAULT_ENABLE

  • CONFIG_PM_S2RAM has been refactored to be promptless. The application now only needs to enable any “suspend-to-ram” power state in the devicetree.

  • The PM_S2RAM_CUSTOM_MARKING has been renamed to HAS_PM_S2RAM_CUSTOM_MARKING and refactored to be promptless. This option is now selected by SoCs if they need it for their “suspend-to-ram” implementations.

• Settings

  • CONFIG_SETTINGS_TFM_ITS

• Shell

  • MQTT backend

    • CONFIG_SHELL_MQTT_TOPIC_RX_ID

    • CONFIG_SHELL_MQTT_TOPIC_TX_ID

    • CONFIG_SHELL_MQTT_CONNECT_TIMEOUT_MS

    • CONFIG_SHELL_MQTT_WORK_DELAY_MS

    • CONFIG_SHELL_MQTT_LISTEN_TIMEOUT_MS

• State Machine Framework

  • smf_get_current_leaf_state()

  • smf_get_current_executing_state()

• Storage

  • CONFIG_FILE_SYSTEM_SHELL_LS_SIZE

• Sys

  • sys_count_bits()

• Task Watchdog

  • CONFIG_TASK_WDT_DUMMY

• Toolchain

  • __deprecated_version

• USB

  • Video

    • uvc_add_format()

• Video

  • video_format.size field

  • video_estimate_fmt_size()

  • video_transfer_buffer()

New Boards

• Adafruit Industries, LLC

  • Feather RP2040 Adalogger (adafruit_feather_adalogger_rp2040)

  • Feather RP2040 CAN bus (adafruit_feather_canbus_rp2040)

  • Adafruit Feather ESP32 (adafruit_feather_esp32)

  • Feather RP2040 RFM95 Lora (adafruit_feather_rfm95_rp2040)

  • Feather RP2040 (adafruit_feather_rp2040)

  • Itsybitsy RP2040 (adafruit_itsybitsy_rp2040)

  • Metro RP2040 (adafruit_metro_rp2040)

  • Adafruit Metro RP2350 (adafruit_metro_rp2350)

  • Trinkey QT2040 (adafruit_trinkey_qt2040)

• Advanced Micro Devices (AMD), Inc.

  • Versal Net APU Development Board (versalnet_apu)

• Ai-Thinker Co., Ltd.

  • Ai-Thinker M62-12F development board (ai_m62_12f)

  • Ai-Thinker ESP32-CAM (esp32_cam)

• Ambiq Micro, Inc.

  • Apollo2 EVB (apollo2_evb)

• Analog Devices, Inc.

  • max32658evkit (max32658evkit)

• Arduino

  • Arduino UNO Q (arduino_uno_q)

• Core Devices LLC

  • Pebble 2 Duo (p2d)

  • Pebble Time 2 (pt2)

• DFRobot

  • DFRobot Beetle RP2040 (beetle_rp2040)

• Doctors of Intelligence & Technology

  • XT-ZB1 Zigbee 3.0 and BLE 5.0 Coexistence Module Development Kit (dt_xt_zb1_devkit)

• Egis Technology Inc

  • ET171 Development Board (egis_et171)

• Espressif Systems

  • ESP32-H2-DevKitM (esp32h2_devkitm)

• FANKE Technology Co., Ltd.

  • FK723M1-ZGT6 (fk723m1_zgt6)

• Firefly

  • ROC-RK3588-PC (Quad-core Cortex-A55) (roc_rk3588_pc)

• FoBE Studio

  • Quill nRF52840 Mesh (quill_nrf52840_mesh)

• Guangdong Embedsky Technology Co., Ltd.

  • TQ H503A (tq_h503a)

• Infineon Technologies

  • PSOC Control C3M5 Evaluation Kit (kit_psc3m5_evk)

  • PSOC™ Edge E84 AI Evaluation Kit (kit_pse84_ai)

  • PSOC Edge E84 Evaluation Kit (kit_pse84_eval)

• Intel Corporation

  • Panther Lake H CRB (intel_ptl_h_crb)

• Microchip Technology Inc.

  • PIC32CM JH01 Curiosity Nano+ Touch Evaluation Kit (pic32cm_jh01_cnano)

  • PIC32CM JH01 Curiosity Pro (pic32cm_jh01_cpro)

  • PIC32CX SG61 Curiosity Ultra (pic32cx_sg61_cult)

  • PIC32CZ CA80 Curiosity Ultra (pic32cz_ca80_cult)

  • SAM E54 Xplained Pro (sam_e54_xpro)

  • SAMA7D65 Curiosity Kit (sama7d65_curiosity)

• Nuvoton Technology Corporation

  • NUMAKER M3334KI (numaker_m3334ki)

  • NUMAKER M5531 (numaker_m5531)

• NXP Semiconductors

  • FRDM-IMX91 (frdm_imx91)

  • FRDM-IMX93 (frdm_imx93)

  • FRDM-K32L2B3 (frdm_k32l2b3)

  • FRDM-MCXA344 (frdm_mcxa344)

  • FRDM-MCXA266 (frdm_mcxa266)

  • FRDM-MCXA346 (frdm_mcxa346)

  • FRDM-MCXA366 (frdm_mcxa366)

  • FRDM-MCXE247 (frdm_mcxe247)

  • FRDM-MCXE31B (frdm_mcxe31b)

  • FRDM-MCXW23 (frdm_mcxw23)

  • i.MX91 QSB (imx91_qsb)

  • i.MX95 15x15 EVK (imx95_evk_15x15)

  • MCX-N9XX-EVK (mcx_n9xx_evk)

  • MCX-N5XX-EVK (mcx_n5xx_evk)

  • MCXW23-EVK (mcxw23_evk)

• Panasonic Corporation

  • PAN B611 Evaluation Board (panb611evb)

• PCB Cupid

  • Glyph-C6 (glyph_c6)

• RAKwireless Technology Limited

  • RAK3112 (rak3112)

• Raspberry Pi Foundation

  • Raspberry Pi Debug Probe (rpi_debug_probe)

• Renesas Electronics Corporation

  • RA4C1 Evaluation Kit (ek_ra4c1)

  • RA8D2 Evaluation Kit (ek_ra8d2)

  • RA8M2 Evaluation Kit (ek_ra8m2)

  • RX261 Evaluation Kit (ek_rx261)

  • RX261 Fast Prototyping Board (fpb_rx261)

  • RX26T Motor Control Board (mcb_rx26t)

  • RA8T2 Motor Control Kit (mck_ra8t2)

  • Capacitive Touch Evaluation System for RA2L1 (rssk_ra2l1)

• Seeed Technology Co., Ltd

  • Wio-WM1110 Dev Kit (wio_wm1110_dev_kit)

  • XIAO NRF54L15 (xiao_nrf54l15)

• Shanghai Ruiside Electronic Technology Co., Ltd.

  • ART-Pi (art_pi)

• Shenzhen Holyiot Technology Co., Ltd.

  • YJ-17095 (holyiot_yj17095)

• SiFli Technologies(Nanjing) Co., Ltd

  • SF32LB52-DevKit-LCD (sf32lb52_devkit_lcd)

• Silicon Laboratories

  • BGM220 Explorer Kit (BGM220-EK4314A) (bgm220_ek4314a)

  • EFM32PG23 Pro Kit (PG23-PK2504A) (pg23_pk2504a)

  • EFM32PG28 Pro Kit (PG28-PK2506A) (pg28_pk2506a)

  • SiWx917 Wi-Fi 6 and Bluetooth LE SoC Dev Kit (BRD2605A) (siwx917_dk2605a)

  • EFR32BG22 Explorer Kit (BG22-EK4108A) (bg22_ek4108a)

  • EFR32xG22E Explorer Kit (xG22-EK2710A) (xg22_ek2710a)

  • xGM260P Explorer Kit (MGM260P-EK2713A) (mgm260p_ek2713a)

  • EFM32PG26 Explorer Kit (PG26-EK2711A) (pg26_ek2711a)

  • EFR32xG26 Explorer Kit (xG26-EK2709A) (xg26_ek2709a)

  • EFR32BG29 Bluetooth LE 4 dBm DCDC Boost WLCSP (BG29-RB4420A) (bg29_rb4420a)

  • EFR32xG22 2.4 GHz +6 dBm Radio Board (slwrb4182a)

  • BGM220P Bluetooth Module 2.4 GHz +8 dBm Radio Board (slwrb4311a)

  • EFR32xG24 2.4 GHz 10 dBm (xG24-RB4186C) (xg24_rb4186c)

  • EFR32xG24 2.4 GHz 20 dBm (xG24-RB4187C) (xg24_rb4187c)

  • xGM240P 10 dBm Module Radio Board (xGM240-RB4316A) (xgm240_rb4316a)

  • xGM240P 20 dBm Module Radio Board (xGM240-RB4317A) (xgm240_rb4317a)

  • MGM260P 2.4 GHz +10 dBm Radio Board (mgm260p_rb4350a)

  • EFR32xG26 2.4 GHz +10 dBm BGA136 Radio Board (xg26_rb4118a)

  • EFR32xG26 2.4 GHz +10 dBm Radio Board (xg26_rb4120a)

  • EFR32BG27 2.4 GHz 4 dBm DCDC Buck CSP (BG27-RB4110B) (bg27_rb4110b)

  • EFR32BG27 2.4 GHz 4 dBm DCDC Boost CSP (BG27-RB4111B) (bg27_rb4111b)

  • EFR32xG27 2.4 GHz 8 dBm (xG27-RB4194A) (xg27_rb4194a)

  • EFR32xG28 868-915 MHz 20 dBm (xG28-RB4401C) (xg28_rb4401c)

• SparkFun Electronics

  • Sparkfun SAMD21 Dev Breakout (sparkfun_samd21_breakout)

• SteelSeries

  • Apex Pro Mini (apex_pro_mini)

• STMicroelectronics

  • Nucleo C092RC (nucleo_c092rc)

  • STM32MP257F-DK Discovery Kit (stm32mp257f_dk)

  • STM32WBA65I Discovery kit (stm32wba65i_dk1)

• Texas Instruments

  • MSPM0G3519 Launchpad (lp_mspm0g3519)

  • MSPM0L2228 Launchpad (lp_mspm0l2228)

• Toradex AG

  • Verdin AM62 (verdin_am62)

• Waveshare Electronics

  • RP2040-GEEK (rp2040_geek)

  • RP2040-Keyboard-3 (rp2040_keyboard_3)

  • RP2040-Matrix (rp2040_matrix)

• WeAct Studio

  • Black Pill STM32H523 (blackpill_h523ce)

  • Black Pill STM32U585 (blackpill_u585ci)

  • ESP32-C3-Mini (weact_esp32c3_mini)

  • WeAct Studio ESP32-C6-Mini (weact_esp32c6_mini)

  • ESP32-S3-Mini (weact_esp32s3_mini)

  • STM32G030 Core Board 1.0 (weact_stm32g030_core)

  • STM32WB55 Core Board V1.0 (weact_stm32wb55_core)

  • WeAct Studio ESP32-S3-B (weact_esp32s3_b)

New Shields

• Adafruit 24LC32 EEPROM Shield

• Adafruit AHT20 Shield

• Adafruit APDS9960 Shield

• Adafruit DPS310 Shield

• Adafruit DRV2605L Shield

• Adafruit FeatherWing 128x32 OLED Shield

• Adafruit HT16K33 LED Matrix Shield

• Adafruit I2C to 8 Channel Solenoid Driver Shield

• Adafruit INA219 Shield

• Adafruit INA237 Shield

• Adafruit LIS2MDL Shield

• Adafruit LIS3DH Shield

• Adafruit LTR-329 Shield

• Adafruit MCP9808 Shield

• Adafruit PCF8523 Shield

• Adafruit TSL2591 Shield

• Adafruit VCNL4040 Shield

• Adafruit VEML7700 Shield

• ArduCam CU450 OV5640 Camera Module

• Arduino Modulino Movement

• Arduino Modulino Thermo

• MikroElektronika 3D Hall 3 Click

• MikroElektronika Air Quality 3 Click

• MikroElektronika Ambient 2 Click

• MikroElektronika H Bridge 4 Click

• MikroElektronika Illuminance Click

• MikroElektronika IR Gesture Click

• MikroElektronika LSM6DSL Click

• MikroElektronika Pressure 3 Click

• MikroElektronika Proximity 9 Click

• MikroElektronika RTC 18 Click

• Nordic nPM1304 EK

• Olimex SHIELD-MIDI

• Renesas EK-RA8D1 to RTK7EKA6M3B00001BU Display Adapter

• Renesas RTK0EG0019B01002BJ Capacitive Touch Application Shield

• Sierra Wireless HL/RC Module Evaluation Kit Shield

• Sparkfun Environmental Combo Shield with ENS160 and BME280

• Sparkfun RV8803 Shield

• Sparkfun SHTC3 Shield

New Drivers

• ADC

  • adi,ad4170-adc

  • adi,ad4190-adc

  • adi,ad4195-adc

  • adi,max32-adc-b-me18

  • infineon,autanalog-sar-adc

  • infineon,hppass-sar-adc

  • nxp,sar-adc

  • renesas,rx-adc

  • renesas,rz-adc-c

  • silabs,iadc

• ARM architecture

  • microchip,sercom-g1

  • nuvoton,numaker-npu

  • renesas,ra-npu

• Audio

  • dlg,da7212

  • nxp,micfil

• Auxiliary Display

  • titanmec,tm1637

• Cache

  • bflb,l1c

• Charger

  • nxp,pca9422-charger

• Clock control

  • bflb,bl61x-clock-controller

  • bflb,bl70x-clock-controller

  • infineon,fixed-clock

  • infineon,fixed-factor-clock

  • infineon,peri-div

  • mediatek,mt818x_cpuclk

  • microchip,sam-d5x-e5x-clock

  • nordic,nrf-iron-hsfll-local

  • nxp,mc-cgm

  • renesas,ra-cgc-utasel

  • renesas,rz-cgc

  • sifli,sf32lb-rcc-clk

  • st,stm32f4-rcc

  • st,stm32fx-pllsai-clock

  • st,stm32h5-rcc

  • st,stm32l0-hsi-clock

  • st,stm32l4-pllsai-clock

  • ti,cc23x0-lf-xosc

• Comparator

  • nxp,cmp

  • renesas,ra-lvd

  • renesas,rx-lvd

  • st,stm32-comp

  • st,stm32g4-comp

  • st,stm32h7-comp

• Counter

  • infineon,tcpwm-counter

  • microchip,tcc-g1

  • nxp,imx-snvs-rtc

  • nxp,lpit

  • nxp,lpit-channel

  • nxp,stm

  • renesas,rz-cmtw-counter

• CPU

  • arm,cortex-a78

  • arm,cortex-m52

  • arm,cortex-m52f

  • intel,panther-lake

  • renesas,rxv1

  • renesas,rxv2

  • renesas,rxv3

  • snps,av5rhx

  • snps,av5rmx

  • xuantie,e907

• CRC

  • renesas,ra-crc

• Cryptographic accelerator

  • espressif,esp32-aes

  • espressif,esp32-sha

  • nxp,els

  • st,stm32-hash

• DAC

  • adi,ad5601

  • adi,ad5611

  • adi,ad5621

  • atmel,samd5x-dac

  • silabs,vdac

• Debug

  • nordic,coresight-nrf

• Display

  • chipone,co5300

  • himax,hx8379c

  • jdi,lpm013m126

  • nxp,imx-lcdifv3

  • sitronix,st7305

  • sitronix,st7306

  • sitronix,st7567

  • solomon,ssd1357

  • ultrachip,uc8151d

  • waveshare,7inch-dsi-lcd-c

  • zephyr,hub12

• DMA

  • andestech,atcdmacx00

  • bflb,dma

  • nuvoton,npcx-gdma

  • renesas,ra-dma

  • renesas,rz-dmac

  • sifli,sf32lb-dmac

  • silabs,gpdma

• Ethernet

  • intel,eth-plat

  • intel,igc-mac

  • microchip,ksz9131

  • microchip,sam-ethernet-controller

  • nxp,imx-netc

  • nxp,imx-netc-blk-ctrl

  • virtio,net

• Flash controller

  • adi,max32-spixf-nor

  • bflb,flash-controller

  • ite,it51xxx-manual-flash-1k

  • microchip,nvmctrl-g1-flash

  • nordic,nrf-mramc

  • nxp,kinetis-ftfc

  • nxp,xspi-nor

  • renesas,ra-flash-lp-controller

  • renesas,ra-mram-controller

  • renesas,rz-qspi-spibsc

  • renesas,rz-qspi-xspi

• File system

  • zephyr,fstab,ext2

• Fuel gauge

  • adi,ltc2959

  • silergy,sy24561

  • ti,bq40z50

• GPIO

  • aesc,gpio

  • arducam,ffc-40pin-connector

  • bflb,bl60x_70x-gpio

  • bflb,bl61x-gpio

  • fobe,quill-header

  • microchip,port-g1-gpio

  • microchip,sam-pio4

  • nxp,pca6408

  • nxp,pcal6408

  • nxp,pcal6416

  • nxp,pcal9538

  • nxp,pcal9539

  • nxp,pcal9722

  • sifli,sf32lb-gpio

  • sifli,sf32lb-gpio-parent

  • silabs,exp-header

  • silabs,gpio

  • silabs,gpio-port

• Hardware information

  • nxp,cmc-reset-cause

  • nxp,imx-src-rev2

  • nxp,rstctl-hwinfo

• I2C

  • infineon,cat1-i2c-pdl

  • renesas,ra-i2c-sci

  • renesas,rz-iic

  • silabs,i2c

  • ti,cc23x0-i2c

• I3C

  • adi,max32-i3c

• IEEE 802.15.4

  • st,stm32wba-ieee802154

• Input

  • chipsemi,chsc5x

  • nxp,mcux-kpp

  • renesas,ra-ctsu

  • renesas,rx-ctsu

• Interrupt controller

  • hazard3,hazard3-intc

  • microchip,dmec-ecia-girq

  • nxp,wuu

  • renesas,rz-icu

  • renesas,rz-intc

  • sifive,clic-draft

• LED

  • leds-group-multicolor

  • nxp,pca9533

• LED strip

  • worldsemi,ws2812-uart

• Mailbox

  • renesas,ra-ipc-mbox

• MDIO

  • intel,igc-mdio

• Memory controller

  • bflb,bl61x-psram

  • motorola,mc146818-bbram

  • nxp,xspi-psram

  • st,stm32-ospi-psram

• MFD

  • motorola,mc146818-mfd

  • nxp,pca9422

  • nxp,sc18is606

  • sifli,sf32lb-rcc

• MIPI DSI

  • nxp,mipi-dsi-dwc

  • st,stm32u5-mipi-dsi

• Miscellaneous

  • nxp,imx93-mediamix

  • nxp,rt600-dsp-ctrl

  • nxp,rt700-dsp-ctrl-hifi4

  • renesas,rx-dtc

  • st,stm32-npu

• Modem

  • quectel,bg96

  • swir,hl7812

  • swir,hl7812-gnss

  • swir,hl7812-offload

  • swir,hl78xx

  • swir,hl78xx-gnss

  • swir,hl78xx-offload

• Multi-bit SPI

  • nordic,nrf-qspi-v2

• MTD

  • andestech,qspi-nor-xip

  • atmel,at25xv021a

  • infineon,fm25xxx

  • jedec,qspi-nor

  • renesas,ra-nv-mram

  • renesas,ra-qspi-nor

  • sifli,sf32lb-mpi-qspi-nor

• OPAMP

  • nxp,opamp

  • nxp,opamp-fast

• Pin control

  • ambiq,apollo2-pinctrl

  • microchip,port-g1-pinctrl

  • nxp,imx-blkctrl-ns-aon

  • nxp,imx-blkctrl-wakeup

  • nxp,mcxe31x-siul2-pinctrl

  • sifli,sf32lb52x-pinmux

• Power management

  • ite,it8xxx2-power-elpm

  • nxp,cmc

  • nxp,spc

  • nxp,vbat

  • renesas,ra-battery-backup

  • sifli,sf32lb-aon

  • sifli,sf32lb-pmuc

• Power domain

  • nordic,nrfs-gdpwr

  • nordic,nrfs-swext

  • silabs,siwx91x-power-domain

• PWM

  • ambiq,ctimer-pwm

  • ambiq,timer-pwm

  • infineon,tcpwm-pwm

  • microchip,tcc-g1-pwm

  • renesas,rz-mtu-pwm

  • ti,cc23x0-lgpt-pwm

• Quad SPI

  • adi,max32-spixf

  • renesas,ra-qspi

  • renesas,rz-spibsc

  • renesas,rz-xspi

• Regulator

  • nxp,pca9422-regulator

  • nxp,vrefv1

• Reserved memory

  • renesas,ofs-memory

• Reset controller

  • microchip,rstc-g1-reset

  • nxp,mrcc-reset

  • sifli,sf32lb-rcc-rctl

• Retained memory

  • sifli,sf32lb-rtc-backup

  • silabs,buram

• RNG

  • ambiq,puf-trng

  • nxp,els-trng

• RTC

  • microcrystal,rv3032

  • nxp,pcf85063a

  • renesas,ra-rtc

  • sifli,sf32lb-rtc

  • silabs,rtcc

  • silabs,sysrtc

  • ti,mspm0-rtc

  • zephyr,rtc-counter

• Renesas RX

  • renesas,rx-swint

• SDHC

  • microchip,sama7g5-sdmmc

  • st,stm32-sdio

• Sensors

  • allegro,als31300

  • invensense,icm42686

  • invensense,icm4268x

  • maxbotix,mb7040

  • maxim,max32664c

  • microchip,mtch9010

  • nxp,pmc-tmpsns

  • nxp,tmpsns

  • omron,2smpb-02e

  • omron,d6f-p0001

  • omron,d6f-p0010

  • pni,rm3100

  • st,iis3dwb

  • ti,hdc302x

  • ti,ina228

  • ti,ina7xx

  • vishay,veml6046

  • we,wsen-isds-2536030320001

  • we,wsen-pdms-25131308XXX05

• Serial controller

  • infineon,cat1-uart-pdl

  • microchip,sercom-g1-uart

  • sifli,sf32lb-usart

  • virtio,console

  • zephyr,uart-bitbang

• SPI

  • egis,et171-spi

  • infineon,cat1-spi-pdl

  • nxp,sc18is606-spi

  • renesas,rz-spi

  • ti,omap-mcspi

• System controller

  • sifli,sf32lb-cfg

• Tachometer

  • zephyr,tach-gpio

• Timer

  • ambiq,ctimer

  • ambiq,timer

  • infineon,tcpwm

  • microchip,xec-basic-timer

  • renesas,rz-cmtw

  • renesas,rz-mtu

  • st,stm32wb0-radio-timer

• USB

  • espressif,esp32-usb-otg

• Video

  • himax,hm01b0

  • renesas,ra-ceu

  • st,stm32-jpeg

  • st,stm32-venc

• Watchdog

  • nxp,cop

  • renesas,rx-iwdt

  • renesas,rz-wdt

  • sifli,sf32lb-wdt

  • ti,j7-rti-wdt

  • xlnx,versal-wwdt

• Wi-Fi

  • nordic,wlan

• XSPI

  • nxp,xspi

New Samples

• Generic ADC stream

• PWM Capture

• CoAP upload

• On-demand CPU frequency scaling

• Cyclic Redundancy Check Drivers (CRC)

• Cyclic Redundancy Check Subsystem (CRC Subsys)

• EXT2 filesystem fstab

• FRDM-MCXA156 lpdac opamp lpadc example

• Hello hl78xx modem driver

• Instrumentation

• Latmon Client

• MAX32664C + MAX86141 Sensor Hub

• MCTP USB Endpoint Node Sample

• MCTP I2C GPIO Endpoint Node Sample

• MCTP I2C GPIO Top Node Sample

• Message Queue

• MIDI2 network transport

• OCPP charge point

• Operational Amplifier (OPAMP) output measure sample

• OpenThread BorderRouter

• Producer Consumer

• Quality of Service

• Red-Black Tree Data Structure

• Renesas Low-voltage Detection Sample using Comparator

• RTK0EG0019B01002BJ Capacitive Touch Application Shield

• VEML6046 RGBIR Color Sensor

• virtiofs filesystem

Libraries / Subsystems

• Logging:

  • Added hybrid rate-limited logging macros to prevent log flooding when messages are generated frequently. The system provides both convenience macros (using default rate from CONFIG_LOG_RATELIMIT_INTERVAL_MS) and explicit rate macros (with custom rate parameter). This follows Linux’s printk_ratelimited pattern while providing more flexibility. The rate limiting is per-macro-call-site, meaning that each unique call to a rate-limited macro has its own independent rate limit. Rate-limited logging can be globally enabled/disabled via CONFIG_LOG_RATELIMIT. When rate limiting is disabled, the behavior can be controlled via CONFIG_LOG_RATELIMIT_FALLBACK to either log all messages or drop them completely. For more details, see Rate-limited logging.

• Mbed TLS

  • Kconfig CONFIG_PSA_CRYPTO is added to simplify the enablement of a PSA Crypto API provider. This is TF-M if CONFIG_BUILD_WITH_TFM is enabled, or Mbed TLS otherwise. CONFIG_PSA_CRYPTO_PROVIDER_TFM is set in the former case while CONFIG_PSA_CRYPTO_PROVIDER_MBEDTLS is set in the latter. CONFIG_PSA_CRYPTO_PROVIDER_CUSTOM is also added to allow end users to provide a custom solution.

• Secure storage

  • The experimental status has been removed. (GitHub #96483)

Other notable changes

• Nordic Semiconductor nRF54L09 PDK (nrf54l09pdk), which only targeted an emulator, has been removed from the tree. It will be replaced with a proper board definition as soon as it’s available.

• Removed support for Nordic Semiconductor nRF54L20 PDK (nrf54l20pdk) since it is replaced with nRF54LM20 DK (nrf54lm20dk).