Zephyr 3.0.0

We are pleased to announce the release of Zephyr RTOS version 3.0.0.

The following sections provide detailed lists of changes by component.

Known issues

You can check all currently known issues by listing them using the GitHub interface and listing all issues with the bug label.

API Changes

Changes in this release

  • Following functions in UART Asynchronous API are using microseconds to represent timeout instead of milliseconds: * uart_tx() * uart_rx_enable()

  • Replaced custom LwM2M float32_value type with a native double type.

  • Added function for getting status of USB device remote wakeup feature.

  • Added ranges and dma-ranges as invalid property to be used with DT_PROP_LEN() along reg and interrupts.

  • The existing crc16() and crc16_ansi() functions have been modified. The former has a new signature. The latter now properly calculates the CRC-16-ANSI checksum. A new function, crc16_reflect(), has been introduced to calculated reflected CRCs.

  • GATT callbacks bt_gatt_..._func_t would previously be called with argument conn = NULL in the event of a disconnect. This was not documented as part of the API. This behavior is changed so the conn argument is provided as normal when a disconnect occurs.

Removed APIs in this release

  • The following Kconfig options related to radio front-end modules (FEMs) were removed:

    • CONFIG_BT_CTLR_GPIO_PA

    • CONFIG_BT_CTLR_GPIO_PA_PIN

    • CONFIG_BT_CTLR_GPIO_PA_POL_INV

    • CONFIG_BT_CTLR_GPIO_PA_OFFSET

    • CONFIG_BT_CTLR_GPIO_LNA

    • CONFIG_BT_CTLR_GPIO_LNA_PIN

    • CONFIG_BT_CTLR_GPIO_LNA_POL_INV

    • CONFIG_BT_CTLR_GPIO_LNA_OFFSET

    • CONFIG_BT_CTLR_FEM_NRF21540

    • CONFIG_BT_CTLR_GPIO_PDN_PIN

    • CONFIG_BT_CTLR_GPIO_PDN_POL_INV

    • CONFIG_BT_CTLR_GPIO_CSN_PIN

    • CONFIG_BT_CTLR_GPIO_CSN_POL_INV

    • CONFIG_BT_CTLR_GPIO_PDN_CSN_OFFSET

    This FEM configuration is hardware description, and was therefore moved to devicetree. See the nordic,nrf-radio devicetree binding’s fem property for information on what to do instead on the Nordic open source controller.

  • Removed Kconfig option CONFIG_USB_UART_CONSOLE. Option CONFIG_USB_UART_CONSOLE was only relevant for console driver when CDC ACM UART is used as backend. Since the behavior of the CDC ACM UART is changed so that it more closely mimics the real UART controller, option is no longer necessary.

  • Removed Kconfig option CONFIG_OPENOCD_SUPPORT in favor of CONFIG_DEBUG_THREAD_INFO.

  • Removed flash_write_protection_set() along with the flash write protection implementation handler.

  • Removed CAN_BUS_UNKNOWN and changed the signature of can_get_state() to return an error code instead.

  • Removed DT_CHOSEN_ZEPHYR_CANBUS_LABEL in favor of utilizing DEVICE_DT_GET.

  • Removed CONFIG_LOG_MINIMAL. Use CONFIG_LOG_MODE_MINIMAL instead.

  • STM32 clock_control driver configuration was moved from Kconfig to devicetree. See the st,stm32-rcc devicetree binding for more information. As a consequence, following Kconfig symbols were removed:

    • CONFIG_CLOCK_STM32_SYSCLK_SRC_HSE

    • CONFIG_CLOCK_STM32_SYSCLK_SRC_HSI

    • CONFIG_CLOCK_STM32_SYSCLK_SRC_MSI

    • CONFIG_CLOCK_STM32_SYSCLK_SRC_PLL

    • CONFIG_CLOCK_STM32_SYSCLK_SRC_CSI

    • CONFIG_CLOCK_STM32_HSE_BYPASS

    • CONFIG_CLOCK_STM32_MSI_RANGE

    • CONFIG_CLOCK_STM32_PLL_SRC_MSI

    • CONFIG_CLOCK_STM32_PLL_SRC_HSI

    • CONFIG_CLOCK_STM32_PLL_SRC_HSE

    • CONFIG_CLOCK_STM32_PLL_SRC_PLL2

    • CONFIG_CLOCK_STM32_PLL_SRC_CSI

    • CONFIG_CLOCK_STM32_AHB_PRESCALER

    • CONFIG_CLOCK_STM32_APB1_PRESCALER

    • CONFIG_CLOCK_STM32_APB2_PRESCALER

    • CONFIG_CLOCK_STM32_CPU1_PRESCALER

    • CONFIG_CLOCK_STM32_CPU2_PRESCALER

    • CONFIG_CLOCK_STM32_AHB3_PRESCALER

    • CONFIG_CLOCK_STM32_AHB4_PRESCALER

    • CONFIG_CLOCK_STM32_PLL_PREDIV

    • CONFIG_CLOCK_STM32_PLL_PREDIV1

    • CONFIG_CLOCK_STM32_PLL_MULTIPLIER

    • CONFIG_CLOCK_STM32_PLL_XTPRE

    • CONFIG_CLOCK_STM32_PLL_M_DIVISOR

    • CONFIG_CLOCK_STM32_PLL_N_MULTIPLIER

    • CONFIG_CLOCK_STM32_PLL_P_DIVISOR

    • CONFIG_CLOCK_STM32_PLL_Q_DIVISOR

    • CONFIG_CLOCK_STM32_PLL_R_DIVISOR

    • CONFIG_CLOCK_STM32_LSE

    • CONFIG_CLOCK_STM32_HSI_DIVISOR

    • CONFIG_CLOCK_STM32_D1CPRE

    • CONFIG_CLOCK_STM32_HPRE

    • CONFIG_CLOCK_STM32_D2PPRE1

    • CONFIG_CLOCK_STM32_D2PPRE2

    • CONFIG_CLOCK_STM32_D1PPRE

    • CONFIG_CLOCK_STM32_D3PPRE

    • CONFIG_CLOCK_STM32_PLL3_ENABLE

    • CONFIG_CLOCK_STM32_PLL3_M_DIVISOR

    • CONFIG_CLOCK_STM32_PLL3_N_MULTIPLIER

    • CONFIG_CLOCK_STM32_PLL3_P_ENABLE

    • CONFIG_CLOCK_STM32_PLL3_P_DIVISOR

    • CONFIG_CLOCK_STM32_PLL3_Q_ENABLE

    • CONFIG_CLOCK_STM32_PLL3_Q_DIVISOR

    • CONFIG_CLOCK_STM32_PLL3_R_ENABLE

    • CONFIG_CLOCK_STM32_PLL3_R_DIVISOR

    • CONFIG_CLOCK_STM32_PLL_DIVISOR

    • CONFIG_CLOCK_STM32_MSI_PLL_MODE

Deprecated in this release

  • Removed <power/reboot.h> and <power/power.h> deprecated headers. <sys/reboot.h> and <pm/pm.h> should be used instead.

  • USBD_CFG_DATA_DEFINE is deprecated in favor of utilizing USBD_DEFINE_CFG_DATA

  • SYS_DEVICE_DEFINE is deprecated in favor of utilizing SYS_INIT.

  • device_usable_check() is deprecated in favor of utilizing device_is_ready().

  • Custom CAN return codes (CAN_TX_OK, CAN_TX_ERR, CAN_TX_ARB_LOST, CAN_TX_BUS_OFF, CAN_TX_UNKNOWN, CAN_TX_EINVAL, CAN_NO_FREE_FILTER, and CAN_TIMEOUT) are deprecated in favor of utilizing standard errno error codes.

  • can_configure() is deprecated in favor of utilizing can_set_bitrate() and can_set_mode().

  • can_attach_workq() is deprecated in favor of utilizing can_add_rx_filter_msgq() and k_work_poll_submit().

  • can_attach_isr() is is deprecated and replaced by can_add_rx_filter().

  • CAN_DEFINE_MSGQ is deprecated and replaced by CAN_MSGQ_DEFINE.

  • can_attach_msgq() is deprecated and replaced by can_add_rx_filter_msgq().

  • can_detach() is deprecated and replaced by can_remove_rx_filter().

  • can_register_state_change_isr() is deprecated and replaced by can_set_state_change_callback().

  • can_write() is deprecated in favor of utilizing can_send().

Stable API changes in this release

New APIs in this release

  • Serial

  • Devicetree

    • Added new Devicetree helpers:

    • New ranges property APIs

    • Removed: DT_CHOSEN_ZEPHYR_CANBUS_LABEL; use DEVICE_DT_GET(DT_CHOSEN(zephyr_canbus)) to get the device instead, and read the name from the device structure if needed.

    • Removed deprecated macros:

      • DT_CLOCKS_LABEL_BY_IDX

      • DT_CLOCKS_LABEL

      • DT_INST_CLOCKS_LABEL_BY_IDX

      • DT_INST_CLOCKS_LABEL_BY_NAME

      • DT_INST_CLOCKS_LABEL

      • DT_PWMS_LABEL_BY_IDX

      • DT_PWMS_LABEL_BY_NAME

      • DT_PWMS_LABEL

      • DT_INST_PWMS_LABEL_BY_IDX

      • DT_INST_PWMS_LABEL_BY_NAME

      • DT_INST_PWMS_LABEL

      • DT_IO_CHANNELS_LABEL_BY_IDX

      • DT_IO_CHANNELS_LABEL_BY_NAME

      • DT_IO_CHANNELS_LABEL

      • DT_INST_IO_CHANNELS_LABEL_BY_IDX

      • DT_INST_IO_CHANNELS_LABEL_BY_NAME

      • DT_INST_IO_CHANNELS_LABEL

      • DT_DMAS_LABEL_BY_IDX

      • DT_INST_DMAS_LABEL_BY_IDX

      • DT_DMAS_LABEL_BY_NAME

      • DT_INST_DMAS_LABEL_BY_NAME

      • DT_ENUM_TOKEN

      • DT_ENUM_UPPER_TOKEN

  • CAN

    • Added can_get_max_filters() for retrieving the maximum number of RX filters support by a CAN controller device.

Kernel

  • Added support for event objects. Threads may wait on an event object such that any events posted to that event object may wake a waiting thread if the posting satisfies the waiting threads’ event conditions.

  • Extended CPU runtime stats to track current, total, peak and average usage (as bounded by the scheduling of the idle thread). This permits a developer to obtain more system information if desired to tune the system.

  • Added “thread_usage” API for thread runtime cycle monitoring.

  • Fixed timeout issues when SYSTEM_CLOCK_SLOPPY_IDLE is configured.

Architectures

  • ARM

    • AARCH32

      • Converted inline assembler calls to using CMSIS provided functions for arm_core_mpu_enable() and arm_core_mpu_disable().

      • Replaced Kconfig CONFIG_CPU_CORTEX_R with CONFIG_ARMV7_R to enable differentiation between v7 and v8 Cortex-R.

      • Updated the Cortex-R syscall behavior to match that of the Cortex-M.

    • AARCH64

      • Fixed out-of-bounds error when large number of IRQs are enabled and ignore special INTDs between 1020 and 1023

      • Added MPU code for ARMv8R

      • Various MMU fixes

      • Added nocache memory segment support

      • Added Xen hypercall interface for ARM64

      • Fixed race condition on SMP scheduling code.

  • Xtensa

    • Introduced a mechanism to automatically figure out which scratch registers are used for internal code, instead of hard-coding. This is to accommodate the configurability of the architecture where some registers may exist in one SoC but not on another one.

    • Added coredump support for Xtensa.

    • Added GDB stub support for Xtensa.

Bluetooth

  • Updated all experimental features in Bluetooth to use the new EXPERIMENTAL selectable Kconfig option

  • Bluetooth now uses logging v2 as with the rest of the tree

  • Audio

    • Implemented the Content Control ID module (CCID)

    • Added support for the Coordinated Set Identification Service (CSIS)

    • Added a Temporary Object Transfer client implementation

    • Added a Media Control client implementation

    • Added a Media Control Server implementation

    • Implemented the Media Proxy API

    • Implemented CIG reconfiguration and state handling

    • Updated the CSIS API for both server and client

    • Added Basic Audio Profile (BAP) unicast and broadcast server support

  • Direction Finding

    • Added support for filtering of Periodic Advertising Sync by CTE type

    • Added additional handling logic for Periodic Advertising Sync Establishemnt

    • Added CTE RX, sampling and IQ report handling in DF connected mode

    • Added support for CTE configuration in connected mode

    • Direction Finding connection mode now uses the newly refactored LLCP implementation

  • Host

    • The CONFIG_BT_SETTINGS_CCC_STORE_ON_WRITE is now enabled by default. Storing CCC right after it’s written reduces risk of inconsistency of CCC values between bonded peers

    • Added support for L2CAP channel reconfiguration.

    • Added support for SMP error code 0xF, where the peer rejects a distributed key

    • Added bt_gatt_service_is_registered() to verify sevice registration

    • Added create an delete procedures to the Object Transfer Service implementation

    • Added support for reassembling extended advertising reports

    • Added support for reassembling periodic advertising reports

    • Added support for setting long periodic advertising data

    • Implemented GATT Long Writes reassembly before forwarding them up to the application

    • The GATT Server DB hash calculation logic has been corrected

    • Added storing of the CCC data upon paring complete

  • Mesh

    • Split out the Proxy services, which can now be compiled out

    • Added an option to call back on every retransmission

    • Added support for multiple Advertising Sets

    • Refactored he Config Client and Health Client API to allow async use

  • Controller

    • Added support for a brand new implementation of LL Control Procedures (LLCP), currently disabled by default, can be enabled using the CONFIG_BT_LL_SW_LLCP_IMPL Kconfig choice

    • Added initial support for Broadcast Isochronous Groups (BIG)

    • Integrated ISO Sync RX datapath

    • Transitioned FEM configurations (PA/LNA) from Kconfig to Devicetree

    • Updated the supported Bluetooth HCI version to 5.3

    • Added support for Periodic Advertiser List

    • Added support for Periodic Advertising Synchronization Receive Enable

    • Added support for filter access list filtering for exended scanning

    • Added support for Advertising Extensions dynamic TX power control

    • Added handling of direct address type in extended adv reports

    • Implemented auxiliary PDU device address matching

    • Implemented fragmentation of extended advertising reports over HCI

    • Implemented Extended Advertising and Scan report back-to-back chaining

    • Implemented Periodic Advertising ADI support,including duplicate filtering

    • Introduced a new preferred central connection spacing feature

  • HCI Driver

    • Added support for a new optional setup() function for vendor-specific setup code required to bring up the controller

    • Fixed DTM mode not being reset correctly with the HCI Reset command

    • Limited the maximum ACL TX buffer size to 251 bytes

Boards & SoC Support

  • Added support for these SoC series:

    • GigaDevice GD32VF103, GD32F3X0, GD32F403 and GD32F450.

    • Raspberry Pi RP2040

    • NXP i.MXRT595, i.MX8MQ, i.MX8MP

  • Removed support for these SoC series:

  • Made these changes in other SoC series:

    • stm32h7: Added SMPS support

    • stm32u5: Enabled TF-M

  • Changes for ARC boards:

  • Added support for these ARM boards:

    • GigaDevice GD32F350R-EVAL

    • GigaDevice GD32F403Z-EVAL

    • GigaDevice GD32F450I-EVAL

    • OLIMEX-STM32-H405

    • NXP MIMXRT595-EVK

    • NXP MIMX8MQ-EVK

    • NXP MIMX8MP-EVK

    • Raspberry Pi Pico

    • ST Nucleo G031K8

    • ST Nucleo H7A3ZI Q

    • ST STM32G081B Evaluation

  • Added support for these ARM64 boards:

    • Intel SoC FPGA Agilex development kit

  • Removed support for these ARM boards:

  • Removed support for these X86 boards:

  • Added support for these RISC-V boards:

    • GigaDevice GD32VF103V-EVAL

    • Sipeed Longan Nano and Nano Lite

  • Made these changes in other boards:

    • sam_e70_xplained: Added support for CAN-FD driver

    • mimxrt11xx: Added SOC level power management

    • mimxrt11xx: Added support for GPT timer as OS timer

  • Added support for these following shields:

Drivers and Sensors

  • ADC

    • Added support for stm32u5 series

    • stm32: Added shared IRQ support

  • CAN

    • Renamed zephyr,can-primary chosen property to zephyr,canbus.

    • Added CAN_ERROR_WARNING CAN controller state.

    • Added Atmel SAM Bosch M_CAN CAN-FD driver.

    • Added NXP LPCXpresso Bosch M_CAN CAN-FD driver.

    • Added ST STM32H7 Bosch M_CAN CAN-FD driver.

    • Rework transmission error handling the NXP FlexCAN driver to automatically retry transmission in case or arbitration lost or missing acknowledge and to fail early in can_send() if in CAN_BUS_OFF state.

    • Added support for disabling automatic retransmissions (“one-shot” mode”) to the ST STM32 bxCAN driver.

    • Converted the emulated CAN loopback driver to be configured through devicetree instead of Kconfig.

  • Counter

    • stm32: Added timer based counter driver (stm32f4 only for now).

  • DAC

    • Added support for GigaDevice GD32 SoCs

    • Added support for stm32u5 series

  • Disk

    • stm32 sdmmc: Converted from polling to IT driven mode and added Hardware Flow Control option

  • DMA

    • Added support for suspending and resuming transfers

    • Added support for SoCs with DMA between application and embedded processors, allows for transfer directions to be identified as such.

    • mimxrt11xx: Added support for DMA

  • EEPROM

    • Added support for the EEPROM present in the TMP116 digital temperature sensor.

  • Entropy

    • Added support for stm32u5 series

  • Ethernet

    • Added support for Synopsys DesignWare MAC driver with implementation on stm32h7 series.

    • stm32 (hal based): Added promiscuous mode support

    • stm32 (hal based): Added PTP L2 timestamping support

    • mimxrt11xx: Added support for 10/100M ENET

  • Flash

    • stm32g0: Added Dual Bank support

    • stm32_qspi: General enhancement (Generation of the reset pulse for SPI-NOR memory, Usage of 4IO for read / write (4READ/4PP), Support for different QSPI banks, Support for 4B addressing on spi-nor)

    • ite_i8xxx2: The driver has been reworked so the write/erase protection management has been moved to implementations of the flash_write() and the flash_erase() calls. The driver was keeping the write protection API which was designed to be removed since 2.6 release.

  • GPIO

    • Added driver for GigaDevice GD32 SoCs

  • I2C

    • Added driver for GigaDevice GD32 SoCs

    • Added stats functionality to all drivers

    • Added I2C driver for Renesas R-Car platform

    • Added support for TCA9548A I2C switch

  • I2S

    • mimxrt10xx: Added support for I2S

    • mimxrt11xx: Added support for I2S

  • Interrupt Controller

    • Added ECLIC driver for GigaDevice RISC-V GD32 SoCs

    • Added EXTI driver for GigaDevice GD32 SoCs

  • MBOX

    • Added MBOX NRFX IPC driver

  • MEMC

    • Added support for stm32f7 series

  • Pin control

    • Introduced a new state-based pin control (pinctrl) API inspired by the Linux design principles. The pinctrl API will replace the existing pinmux API, so all platforms using pinmux are encouraged to migrate. A detailed guide with design principles and implementation guidelines can be found in Pin Control.

    • Platforms already supporting the pinctrl API:

      • GigaDevice GD32

      • Nordic (preliminary support)

      • Renesas R-Car

      • STM32

  • PWM

    • stm32: DT bindings: st,prescaler property was moved from pwm to parent timer node.

    • stm32: Implemented PWM capture API

    • Added driver for GigaDevice GD32 SoCs. Only PWM output is supported.

    • mimxrt1021: Added support for PWM

  • Sensor

    • Added Invensense MPU9250 9-axis IMU driver.

    • Added ITE IT8XX2 tachometer driver.

    • Added STM L5 die temperature driver.

    • Added STM I3G4250D gyroscope driver.

    • Added TI TMP108 driver.

    • Added Winsen MH-Z19B CO2 driver.

    • Constified device config access in sbs_gauge and LM75 drivers.

    • Dropped DEV_DATA/DEV_CFG usage from various drivers.

    • Moved ODR and range properties from Kconfig to devicetree in various STM drivers.

    • Refactored INA230 driver to add support for INA237 variant.

    • Refactored various drivers to use I2C/SPI/GPIO DT APIs.

    • Enabled level triggered interrupts in LIS2DH driver.

    • Fixed TMP112 driver to avoid I2C burst write portability issues.

    • Fixed SENSOR_DEG2RAD_DOUBLE macro in LSM6DS0 driver.

    • Fixed gain factor in LSM303DLHC magnetometer driver.

  • Serial

    • stm32: Implemented half-duplex option.

    • Added driver for GigaDevice GD32 SoCs. Polling and interrupt driven modes are supported.

  • SPI

    • stm32: Implemented Frame format option (TI vs Motorola).

    • mimxrt11xx: Added support for Flexspi

  • Timer

    • stm32 lptim: Added support for stm32h7

  • USB

    • Added support for stm32u5 series (OTG full speed)

  • Watchdog

    • Added support for stm32u5 series (Independent and Window)

    • mimxrt1170: Added support for watchdog on CM7

Networking

  • CoAP:

    • Refactored coap_client/coap_server samples to make better use of observe APIs.

    • Added PATCH, iPATCH and FETCH methods.

    • A few fixes for the block transfer handling.

  • DNS:

    • Make mdns and llmnr responders join their multicast groups.

    • Added support for mdns/dns_sd service type enumeration.

  • ICMPv6:

    • Added support for Route Information option processing.

  • IPv4:

    • Add IPv4 support to multicast monitor.

  • LwM2M:

    • Added a parameter to forcefully close the LwM2M session to lwm2m_rd_client_stop() function.

    • Replaced custom float32_value_t type with double.

    • Added LWM2M_FIRMWARE_PORT_NONSECURE/ LWM2M_FIRMWARE_PORT_SECURE options, which allow to specify a custom port or firmware update.

    • Added lwm2m_update_device_service_period() API function.

    • Added observe callback for observe and notification events.

    • Added support for multiple LwM2M Firmware Update object instances.

    • Improved error handling in LwM2M content writers.

    • Added unit tests for LwM2M content writers.

    • Implmented LwM2M Security, Server, Connection Monitor objects in version 1.1.

    • Multiple minor bugfixes in the LwM2M stack.

    • Added support for the following objects:

      • LWM2M Software Management (ID 9)

      • LwM2M Gateway (ID 25)

      • IPSO Current (ID 3317)

      • uCIFI Battery (ID 3411)

      • IPSO Filling level (ID 3435)

  • Misc:

    • gptp: clock sync ratio as double, not float

    • Added support for route lifetime and preference.

    • Refactored various packed structures across the networking stack, to avoid unaliged access warnings from gcc.

    • Added automatic loopback addresses registration to loopback interface.

    • Fixed source address selection for ARP.

    • Allow to implment a custom IEEE802154 L2 on top of existing drivers.

    • Introduced a network packet filtering framework.

  • MQTT:

  • OpenThread:

    • Updated OpenThread revision up to commit ce77ab3c1d7ad91b284615112ae38c08527bf73e.

    • Fixed an overflow bug in the alarm implementation for Zephyr.

    • Added crypto backend based on PSA API.

    • Allow to store OpenThread settings in RAM.

  • Socket:

    • Fixed zsock_sendmsg() when payload size exceeded network MTU.

    • Added socket processing priority.

    • Fixed possible crash in zsock_getaddrinfo() when DNS callback is delayed.

  • Telnet:

    • Fixed handling of multiple commands in a single packet.

    • Enabled command handling by default.

  • TCP:

    • Added support for sending our MSS to peer.

    • Fixed packet sending to local addresses.

    • Fixed possible deadlock between TCP and socket layer, when connection close is initiated from both sides.

    • Multiple other minor bugfixes and improvements in the TCP implementation.

  • TLS:

    • Added support for TLS_CERT_NOCOPY socket option, which allows to optimise mbed TLS heap usage.

    • Fixed POLLHUP detection when underlying TCP connection is closed.

    • Fixed mbedtls session reset on handshake errors.

USB

Build and Infrastructure

  • Build system

    • New CMake extension functions:

      • dt_alias()

      • target_sources_if_dt_node()

    • The following CMake extension functions now handle devicetree aliases:

      • dt_node_exists()

      • dt_node_has_status()

      • dt_prop()

      • dt_num_regs()

      • dt_reg_addr()

      • dt_reg_size()

  • Devicetree

    • Support for the devicetree compatible ti,ina23x has been removed. Instead, use ti,ina230 or ti,ina237.

  • West (extensions)

    • Added support for gd32isp runner

Libraries / Subsystems

  • Management

    • Fixed the mcumgr SMP protocol over serial not adding the length of the CRC16 to packet length.

    • Kconfig option OS_MGMT_TASKSTAT is now disabled by default.

  • Power management

    • Power management resources are now manually allocated by devices using PM_DEVICE_DEFINE, PM_DEVICE_DT_DEFINE or PM_DEVICE_DT_INST_DEFINE. Device instantiation macros take now a reference to the allocated resources. The reference can be obtained using PM_DEVICE_GET, PM_DEVICE_DT_GET or PM_DEVICE_DT_INST_GET. Thanks to this change, devices not implementing support for device power management will not use unnecessary memory.

    • Device runtime power management API error handling has been simplified.

    • pm_device_runtime_enable() suspends the target device if not already suspended. This change makes sure device state is always kept in a consistent state.

    • Improved PM states Devicetree macros naming

    • Added a new API call pm_state_cpu_get_all() to obtain information about CPU power states.

    • pm/device.h is no longer included by device.h, since the device API no longer depends on the PM API.

    • Added support for power domains. Power domains are implemented as simple devices and use the existent PM API for resume and suspend, devices under a power domain are notified when it becomes active or suspended.

    • Added a new action PM_DEVICE_ACTION_TURN_ON. This action is used by power domains to notify devices when it becomes active.

    • Added new API (pm_device_state_lock(), pm_device_state_unlock() and pm_device_state_is_locked()) to lock a device pm state. When the device has its state locked, the kernel will no longer suspend and resume devices when the system goes to sleep and device runtime power management operations will fail.

    • pm_device_state_set() is deprecated in favor of utilizing pm_device_action_run().

    • Proper multicore support. Devices are suspended only when the last active CPU. A cpu parameter was added to Policy and SoC interfaces.

  • Tracing

    • Support all syscalls being traced using the python syscall generator to introduce a tracing hook call.

  • IPC

    • Added IPC service support and RPMsg with static VRINGs backend

HALs

  • STM32

    • stm32cube/stm32wb and its lib: Upgraded to version V1.12.1

    • stm32cube/stm32mp1: Upgraded to version V1.5.0

    • stm32cube/stm32u5: Upgraded to version V1.0.2

  • Added GigaDevice HAL module

MCUboot

  • Fixed serial recovery skipping on nrf5340.

  • Fixed issue which caused that progressive’s erase feature was off although was selected by Kconfig (introduced by #42c985cead).

  • Added check of reset address in incoming image validation phase, see CONFIG_MCUBOOT_VERIFY_IMG_ADDRESS.

  • Allow image header bigger than 1 KB for encrypted images.

  • Support Mbed TLS 3.0.

  • stm32: watchdog support.

  • many documentation improvements.

  • Fixed deadlock on cryptolib selectors in Kconfig.

  • Fixed support for single application slot with serial recovery.

  • Added various hooks to be able to change how image data is accessed, see CONFIG_BOOT_IMAGE_ACCESS_HOOKS.

  • Added custom commands support in serial recovery (PERUSER_MGMT_GROUP): storage erase CONFIG_BOOT_MGMT_CUSTOM_STORAGE_ERASE, custom image status CONFIG_BOOT_MGMT_CUSTOM_IMG_LIST.

  • Added support for direct image upload, see CONFIG_MCUBOOT_SERIAL_DIRECT_IMAGE_UPLOAD in serial recovery.

Trusted Firmware-m

  • Updated TF-M to 1.5.0 release, with a handful of additional cherry-picked commits.

Documentation

Tests and Samples

  • Drivers: clock_control: Added test suite for stm32 (u5, h7).