Zephyr 4.0.0

We are pleased to announce the release of Zephyr version 4.0.0.

Major enhancements with this release include:

  • Secure Storage Subsystem: A newly introduced secure storage subsystem allows the use of the PSA Secure Storage API and of persistent keys in the PSA Crypto API on all board targets. It is now the standard way to provide device-specific protection to data at rest. (GitHub #76222)

  • ZMS (Zephyr Memory Storage) Subsystem: ZMS is a new key-value storage subsystem compatible with all non-volatile storage types, including traditional NOR flash and advanced technologies like RRAM and MRAM that support write without erasure.

  • Analog Comparators: A new comparator device driver subsystem for analog comparators has been added, complete with shell support. It supports initial configuration through Devicetree and runtime configuration through vendor specific APIs. Initially the nordic,nrf-comp, nordic,nrf-lpcomp and nxp,kinetis-acmp are supported.

  • Stepper Motors: It is now possible to interact with stepper motors using a standard API thanks to the new stepper device driver subsystem, which also comes with shell support. Initially implemented drivers include a simple zephyr,gpio-steppers and a complex sensor-less stall-detection capable with integrated ramp-controller adi,tmc5041.

  • Haptics: A new Haptics device driver subsystem allows unified access to haptic controllers, enabling users to add haptic feedback to their applications.

  • Multimedia Capabilities Zephyr’s audio and video capabilities have been expanded with support for new image sensors, video interfaces, audio interfaces, and codecs being supported.

  • Prometheus Library: A Prometheus metrics library has been added to the networking stack. It provides a way to expose metrics to Prometheus clients over HTTP, facilitating the consolidated remote monitoring of Zephyr devices alongside other systems typically monitored using Prometheus.

  • Documentation Improvements: Several enhancements were made to the online documentation to improve content discovery and navigation. These include a new interactive board catalog and an interactive directory for code samples.

  • Expanded Board Support: Over 60 new boards and shields are supported in Zephyr 4.0.

An overview of the changes required or recommended when migrating your application from Zephyr v3.7.0 to Zephyr v4.0.0 can be found in the separate migration guide.

The following sections provide detailed lists of changes by component.

API Changes

Removed APIs in this release

  • Macro K_THREAD_STACK_MEMBER, deprecated since v3.5.0, has been removed. Use K_KERNEL_STACK_MEMBER instead.

  • CBPRINTF_PACKAGE_COPY_* macros, deprecated since Zephyr 3.5.0, have been removed.

  • _ENUM_TOKEN and _ENUM_UPPER_TOKEN macros, deprecated since Zephyr 2.7.0, are no longer generated.

  • Removed deprecated arch-level CMSIS header files include/zephyr/arch/arm/cortex_a_r/cmsis.h and include/zephyr/arch/arm/cortex_m/cmsis.h. cmsis_core.h needs to be included now.

  • Removed deprecated ceiling_fraction macro. DIV_ROUND_UP needs to be used now.

  • Removed deprecated header file include/zephyr/random/rand32.h. random.h needs to be included now.

  • Deprecated EARLY, APPLICATION and SMP init levels can no longer be used for devices.

  • Removed deprecated net_pkt functions.

Deprecated in this release

Architectures

  • ARC

  • ARM

    • Added support of device memory attributes on Cortex-M (arm_mpu_v8)

  • ARM64

    • Added initial support for arch_stack_walk() that supports unwinding via esf only

    • Added sys_arch_reboot() support to ARM64

    • Added support for demand paging.

    • Added support for Linkable Loadable Extensions (LLEXT).

  • RISC-V

    • The stack traces upon fatal exception now prints the address of stack pointer (sp) or frame pointer (fp) depending on the build configuration.

    • When CONFIG_EXTRA_EXCEPTION_INFO is enabled, the exception stack frame (arch_esf) has an additional field csf that points to the callee-saved-registers upon an fatal error, which can be accessed in k_sys_fatal_error_handler() by esf->csf.

      • For SoCs that select RISCV_SOC_HAS_ISR_STACKING, the SOC_ISR_STACKING_ESF_DECLARE has to include the csf member, otherwise the build would fail.

  • Xtensa

  • x86

Kernel

Bluetooth

Boards & SoC Support

  • Added support for these SoC series:

    • Added ESP32-C2 and ESP8684 SoC support.

    • Added STM32U0 series with GPIO, Serial, I2C, DAC, ADC, flash, PWM and counter driver support.

    • Added STM32WB0 series with GPIO, Serial, I2C, SPI, ADC, DMA and flash driver support.

    • Added STM32U545xx SoC variant.

    • Added NXP i.MX93’s Cortex-M33 core

    • Added NXP MCXW71, MCXC242, MCXA156, MCXN236, MCXC444, RT1180

  • Made these changes in other SoC series:

    • NXP S32Z270: Added support for the new silicon cut version 2.0. Note that the previous versions (1.0 and 1.1) are no longer supported.

    • NXP s32k3: fixed RAM retention issue

    • NXP s32k1: obtain system clock frequency from Devicetree versions (1.0 and 1.1) are no longer supported.

    • Added ESP32 WROVER-E-N16R4 variant.

    • STM32H5: Added support for OpenOCD through STMicroelectronics OpenOCD fork.

    • MAX32: Enabled Segger RTT and SystemView support.

    • Silabs Series 2: Use oscillator, clock and DCDC configuration from device tree during init.

    • Silabs Series 2: Added initialization for SMU (Security Management Unit).

    • Silabs Series 2: Use sleeptimer as the default OS timer instead of systick.

    • NXP i.MX8MP: Enable the IRQ_STEER interrupt controller.

    • NXP RWxxx:

      • added additional support to Wakeup from low power modes

      • RW61x: increased main stack size to avoid stack overflows when running BLE

      • RW612: enabled SCTIMER

    • NXP IMXRT: Fixed flexspi boot issue caused by an erroneous relocation of the Flash Configuration Block of Kconfig defaults being sourced

    • NXP RT11xx: enabled FlexIO

    • NXP IMXRT116x: Fixed bus clocking to align with the settings of the MCUXpresso SDK

    • NXP mimxrt685: fixed clocks to enable DMIC

    • NXP MCX N Series: Fixed NXP LPSPI native chip select when using synchronous API with DMA bug

    • Nordic nRF54H: Added support for the FLPR (Fast Lightweight Processor) RISC-V CPU.

Build system and Infrastructure

  • Added support for .elf files to the west flash command for jlink, pyocd and linkserver runners.

  • Extracted pickled EDT generation from gen_defines.py into gen_edt.py. This moved the following parameters from the cmake variable EXTRA_GEN_DEFINES_ARGS to EXTRA_GEN_EDT_ARGS:

    • --dts

    • --dtc-flags

    • --bindings-dirs

    • --dts-out

    • --edt-pickle-out

    • --vendor-prefixes

    • --edtlib-Werror

  • Switched to using imgtool directly from the build system when signing images instead of calling west sign.

  • Added support for selecting MCUboot operating mode in sysbuild using SB_CONFIG_MCUBOOT_MODE.

  • Added support for RAM-load MCUboot operating mode in build system, including sysbuild support.

  • Added a script parameter to Twister to enable HW specific arguments, such as a system specific timeout

Documentation

  • Added a new interactive board catalog enabling users to search boards by criteria such as name, architecture, vendor, or SoC.

  • Added a new interactive code sample catalog for quickly finding code samples based on name and description.

  • Added zephyr:board directive and zephyr:board role to mark Sphinx pages as board documentation and reference them from other pages. Most existing board documentation pages have been updated to use this directive, with full migration planned for the next release.

  • Added zephyr:code-sample-category directive to describe and group code samples in the documentation.

  • Added a link to the source code of the driver matching a binding’s compatible string (when one can be found in the Zephyr tree) to the Devicetree bindings documentation.

  • Added a button to all code sample README pages allowing to directly browse the sample’s source code on GitHub.

  • Moved Zephyr C API documentation out of main documentation. API references now feature a rich tooltip and link to the dedicated Doxygen site.

  • Added two new build commands, make html-live and make html-live-fast, that automatically locally host the generated documentation. They also automatically rebuild and rehost the documentation when changes to the input .rst files are detected on the filesystem.

Drivers and Sensors

  • ADC

    • Added proper ADC2 calibration entries in ESP32.

    • Fixed calibration scheme in ESP32-S3.

    • STM32H7: Added support for higher sampling frequencies thanks to boost mode implementation.

    • Added initial support for Renesas RA8 ADC driver (renesas,ra-adc)

    • Added driver for Analog Devices MAX32 SoC series (adi,max32-adc).

    • Added support for NXP S32 SAR_ADC (nxp,s32-adc-sar)

    • Added support for Ambiq Apollo3 series (ambiq,adc).

  • CAN

  • Clock control

  • Codec (Audio)

  • Comparator

  • Counter

    • Added initial support for Renesas RA8 AGT counter driver (renesas,ra-agt)

    • Added driver for Analog Devices MAX32 SoC series (adi,max32-counter).

    • Updated the NXP counter_mcux_lptmr driver to support multiple instances of the lptmr peripheral.

    • Converted the NXP S32 System Timer Module driver to native Zephyr code

    • Added support for late and short relative alarms area to NXP nxp_sys_timer (nxp,s32-sys-timer)

  • Crypto

    • Added support for STM32L4 AES.

  • DAC

    • DAC API now supports specifying channel path as internal. Support has been added in STM32 drivers.

  • Disk

    • STM32F7 SDMMC driver now supports usage of DMA.

    • STM32 mem controller driver now supports FMC for STM32H5.

    • SDMMC subsystem driver will now power down the SD card when the disk is deinitialized

  • Display

  • DMA

    • Added driver for Analog Devices MAX32 SoC series (adi,max32-dma).

    • Added flip feature to the NXP dma_mcux_pxp driver (nxp,pxp)

    • Added support for eDMAv5 and cyclic mode (GitHub #80584) to the NXP EMDA driver (nxp,edma)

  • EEPROM

    • Added support for using the EEPROM simulator with embedded C standard libraries (zephyr,sim-eeprom).

  • Entropy

  • Ethernet

    • Added a get_phy() function to the ethernet driver api, which returns the phy device associated to a network interface.

    • Added 2.5G and 5G link speeds to the ethernet hardware capabilities api.

    • Added check for null api pointer in net_eth_get_hw_capabilities(), fixing netusb crash.

    • Added synopsis dwc_xgmac ethernet driver.

    • Added NXP iMX NETC driver.

    • Adin2111

      • Fixed bug that resulted in double RX buffer read when generic spi protocol is used.

      • Fixed essential thread termination on OA read failure.

      • Skip checks for port 2 on the adin1110 since it doesn’t apply, as there is no port 2.

    • ENC28J60

      • Added support for the zephyr,random-mac-address property.

      • Fixed race condition between interrupt service and L2 init affecting carrier status in init.

    • ENC424j600: Added ability to change mac address at runtime with net management api.

    • ESP32: Added configuration of interrupts from DT.

    • Lan865x

      • Enable all multicast MAC address for IPv6. All multicast mac address can now be received and allows for correct handling of the IPv6 neighbor discovery protocol.

      • Fixed transmission stopping when setting mac address or promiscuous mode.

    • LiteX

      • Renamed the compatible from litex,eth0 to litex,liteeth.

      • Added support for multiple instances of the liteX ethernet driver.

      • Added support for VLAN to the liteX ethernet driver.

      • Added phy support.

    • Native_posix

      • Implemented getting the interface name from the command line.

      • Now prints error number in error message when creating an interface.

    • NXP ENET_QOS: Fixed check for zephyr,random-mac-address property.

    • NXP ENET:

      • Fixed fused MAC address initialization code.

      • Fixed code path for handling tx errors with timestamped frames.

      • Fixed network carrier status race condition during init.

    • NXP S32: Added configs to enable VLAN promiscuous and untagged, and enable SI message interrupt.

    • STM32

      • Driver can now be configured to use a preemptive RX thread priority, which could be useful in case of high network traffic load (reduces jitter).

      • Added support for DT-defined mdio.

      • Fixed bus error after network disconnection that happened in some cases.

    • TC6: Combine read chunks into continuous net buffer. This fixes IPv6 neighbor discovery protocol because 64 bytes was not enough for all headers.

    • PHY driver changes

      • Added Qualcomm AR8031 phy driver.

      • Added DP83825 phy driver.

      • PHY_MII

        • Fixed generic phy_mii driver not using the value of the no-reset property from Devicetree.

        • Removed excess newlines from log output of phy_mii driver.

      • KSZ8081

        • Fixed reset times during init that were unnecessarily long.

        • Removed unnecessary reset on every link configuration that blocked system workqueue

        • Fixed issue relating to strap-in override bits.

  • Flash

    • Fixed SPI NOR driver issue where wp, hold and reset pins were incorrectly initialized from device tee when SFDP at run-time has been enabled (GitHub #80383)

    • Updated all Espressif’s SoC driver initialization to allow new chipsets and octal flash support.

    • Added CONFIG_SPI_NOR_ACTIVE_DWELL_MS, to the SPI NOR driver configuration, which allows setting the time during which the driver will wait before triggering Deep Power Down (DPD). This option replaces CONFIG_SPI_NOR_IDLE_IN_DPD, aiming at reducing unnecessary power state changes and SPI transfers between other operations, specifically when burst type access to an SPI NOR device occurs.

    • Added CONFIG_SPI_NOR_INIT_PRIORITY to allow selecting the SPI NOR driver initialization priority.

    • The flash API has been extended with the flash_copy() utility function which allows performing direct data copies between two Flash API devices.

    • Fixed a Flash Simulator issue where offsets were assumed to be absolute instead of relative to the device base address (GitHub #79082).

    • Extended STM32 OSPI drivers to support QUAL, DUAL and SPI modes. Additionally, added support for custom write and SFDP:BFP opcodes.

    • Added possibility to run STM32H7 flash driver from Cortex-M4 core.

    • Implemented readout protection handling (RDP levels) for STM32F7 SoCs.

    • Added initial support for Renesas RA8 Flash controller driver (renesas,ra-flash-hp-controller)

    • Added driver for Analog Devices MAX32 SoC series (adi,max32-flash-controller).

    • Added support for W25Q512JV and W25Q512NW-IQ/IN to NXP’s MCUX Flexspi driver

    • Renamed the binding nxp,iap-msf1 to nxp,msf1 for accuracy

  • GPIO

    • tle9104: Add support for the parallel output mode via setting the properties parallel-out12 and parallel-out34.

    • Converted the NXP S32 SIUL2 drivers to native Zephyr code

    • Converted the NXP wake-up drivers to native Zephyr code

  • Haptics

    • Introduced a haptics device driver subsystem selected with CONFIG_HAPTICS

    • Added support for TI DRV2605 haptic driver IC (ti,drv2605)

    • Added a sample for the DRV2605 haptic driver to trigger ROM events (DRV2605 Haptic Driver)

  • I2C

  • I2S

    • Added ESP32-S3 and ESP32-C3 driver support.

  • I3C

    • Added support for SETAASA optimization during initialization. Added a supports-setaasa property to i3c-devices.yaml.

    • Added sending DEFTGTS if any devices that support functioning as a secondary controller on the bus.

    • Added retrieving GETMXDS within i3c_device_basic_info_get() if BCR mxds bit is set.

    • Added helper functions for sending CCCs for ENTTM, VENDOR, DEFTGTS, SETAASA, GETMXDS, SETBUSCON, RSTACT DC, ENTAS0, ENTAS1, ENTAS2, and ENTAS3.

    • Added shell commands for sending CCCs for ENTTM, VENDOR, DEFTGTS, SETAASA, GETMXDS, SETBUSCON, RSTACT DC, ENTAS0, ENTAS1, ENTAS2, and ENTAS3.

    • Added shell commands for setting the I3C speed, sending HDR-DDR, raising IBIs, enabling IBIs, disabling IBIs, and scanning I2C addresses.

    • i3c_ccc_do_setdasa() has been modified to now require specifying the assigned dynamic address rather than having the dynamic address be determined within the function.

    • i3c_determine_default_addr() has been removed

    • attach_i3c_device now no longer requires the attached address as an argument. It is now up to the driver to determine the attached address from the i3c_device_desc.

  • Input

    • New feature: zephyr,input-double-tap.

    • New driver: ilitek,ili2132a.

    • Added power management support to all keyboard matrix drivers, added a no-disconnect property to gpio-keys so it can be used with power management on GPIO drivers that do not support pin disconnection.

    • Added a new framework for touchscreen common properties and features (screen size, inversion, xy swap).

    • Fixed broken ESP32 input touch sensor driver.

    • gt911: * Fixed the INT pin to be always set during probe to allow for proper initialization * Fixed OOB buffer write to touch points array * Add support for multitouch events

  • Interrupt

    • Updated ESP32 family interrupt allocator with proper IRQ flags and priorities.

    • Implemented a function to set pending interrupts for Arm GIC

    • Added a safe configuration option so multiple OS’es can share the same GIC and avoid reconfiguring the distributor

  • LED

    • lp5562: added enable-gpios property to describe the EN/VCC GPIO of the lp5562.

    • lp5569: added charge-pump-mode property to configure the charge pump of the lp5569.

    • lp5569: added enable-gpios property to describe the EN/PWM GPIO of the lp5569.

    • LED code samples have been consolidated under the samples/drivers/led directory.

  • LED Strip

    • Updated ws2812 GPIO driver to support dynamic bus timings

  • Mailbox

    • Added driver support for ESP32 and ESP32-S3 SoCs.

  • MDIO

    • Added litex MDIO driver.

    • Added support for mdio shell to stm32 mdio.

    • Added mdio driver for dwc_xgmac synopsis ethernet.

    • Added NXP IMX NETC mdio driver.

    • NXP ENET MDIO: Fixed inconsistent behavior by keeping the mdio interrupt enabled all the time.

  • MEMC

    • Add driver for APS6404L PSRAM using NXP FLEXSPI

  • MFD

  • Modem

    • Added support for the U-Blox LARA-R6 modem.

    • Added support for setting the modem’s UART baudrate during init.

  • MIPI-DBI

  • MIPI-CSI

    • Improve NXP CSI and MIPI_CSI2Rx drivers to support varibale frame rates

  • Pin control

    • Added support for Microchip MEC5

    • Added SCMI-based driver for NXP i.MX

    • Added support for i.MX93 M33 core

    • Added support for ESP32C2

    • STM32: CONFIG_PINCTRL is now selected by drivers requiring it and shouldn’t be enabled at board level anymore.

  • PWM

    • rpi_pico: The driver now configures the divide ratio adaptively.

    • Added initial support for Renesas RA8 PWM driver (renesas,ra8-pwm)

    • Added driver for Analog Devices MAX32 SoC series (adi,max32-pwm).

    • Fixed a build issue of the NXP TPM driver for variants without the capability to combine channels

  • Regulators

    • Upgraded CP9314 driver to B1 silicon revision

    • Added basic driver for MPS MPM54304

  • RTC

    • STM32: HSE can now be used as domain clock.

    • Added the NXP IRTC Driver.

  • RTIO

  • SAI

    • Improved NXP’s SAI driver to use a default clock if none is provided in the DT

    • Fixed a bug in the NXP SAI driver that caused a crash on a FIFO under- and overrun

    • Fixed a bug that reset the NXP ESAI during initialization (unnecessary)

    • Added support for PM operations in NXP’s SAI driver

  • SDHC

    • Added ESP32-S3 driver support.

    • SPI SDHC driver now handles SPI devices with runtime PM support correctly

    • Improved NXP’s imx SDHC driver to assume card is present if no detection method is provided

  • Sensors

    • General

      • The existing driver for the Microchip MCP9808 temperature sensor transformed and renamed to support all JEDEC JC 42.4 compatible temperature sensors. It now uses the jedec,jc-42.4-temp compatible string instead to the microchip,mcp9808 string.

      • Added support for VDD based ADC reference to the NTC thermistor driver.

      • Added Avago APDS9253 (avago,apds9253) and APDS9306 (avago,apds9306) ambient light sensor drivers.

      • Added gain and resolution attributes (SENSOR_ATTR_GAIN and SENSOR_ATTR_RESOLUTION).

    • ADI

      • Add RTIO streaming support to ADXL345, ADXL362, and ADXL372 accelerometer drivers.

    • Bosch

      • Merged BMP390 into BMP388.

      • Added support for power domains to BMM150 and BME680 drivers.

      • Added BMP180 pressure sensor driver (bosch,bmp180).

    • Memsic

      • Added MMC56X3 magnetometer and temperature sensor driver (memsic,mmc56x3).

    • NXP

      • Added P3T1755 digital temperature sensor driver (nxp,p3t1755).

      • Added FXLS8974 accelerometer driver (nxp,fxls8974).

    • ST

      • Aligned drivers to stmemsc HAL i/f v2.6.

      • Added LSM9DS1 accelerometer/gyroscope/magnetometer sensor driver (st,lsm9ds1).

    • TDK

      • Added I2C bus support to ICM42670.

    • TI

      • Added support for INA236 to the existing INA230 driver.

      • Added support for TMAG3001 to the existing TMAG5273 driver.

      • Added TMP1075 temperature sensor driver (ti,tmp1075).

    • Vishay

      • Added trigger capability to VCNL36825T driver.

    • WE

      • Added Würth Elektronik HIDS-2525020210002 we,wsen-hids-2525020210002 humidity sensor driver.

      • Added general samples for triggers

  • Serial

    • LiteX: Renamed the compatible from litex,uart0 to litex,uart.

    • Nordic: Removed CONFIG_UART_n_GPIO_MANAGEMENT Kconfig options (where n is an instance index) which had no use after pinctrl driver was introduced.

    • NS16550: Added support for Synopsys Designware 8250 UART.

    • Renesas: Added support for SCI UART.

    • Sensry: Added UART support for Ganymed SY1XX.

  • SPI

  • Steppers

    • Introduced stepper controller device driver subsystem selected with CONFIG_STEPPER

    • Introduced stepper shell commands for controlling and configuring stepper motors with CONFIG_STEPPER_SHELL

    • Added support for ADI TMC5041 (adi,tmc5041)

    • Added support for gpio-stepper-controller (zephyr,gpio-steppers)

    • Added stepper api test-suite

    • Added stepper shell test-suite

  • Timer

  • USB

    • Added support for USB HS on STM32U59x/STM32U5Ax SoC variants.

    • Enhanced DWC2 UDC driver

    • Added UDC drivers for Smartbond, NuMaker USBD and RP2040 device controllers

    • Enabled SoF in NXP USB drivers (UDC)

    • Enabled cache maintenance in the NXP EHCI USB driver

  • Video

    • Introduced API to control frame rate

    • Introduced API for partial frames transfer with the video buffer field line_offset

    • Introduced API for multi-heap video buffer allocation with CONFIG_VIDEO_BUFFER_USE_SHARED_MULTI_HEAP

    • Introduced bindings for common video link properties in video-interfaces.yaml. Migration to the new bindings is tracked in GitHub #80514

    • Introduced missing CONFIG_VIDEO_LOG_LEVEL

    • Added a sample for capturing video and displaying it with LVGL (Video capture to LVGL)

    • Added an automatic test to check colorbar pattern correctness

    • Added support for GalaxyCore GC2145 image sensor (galaxycore,gc2145)

    • Added support for ESP32-S3 LCD-CAM interface (espressif,esp32-lcd-cam)

    • Added support for NXP MCUX SMARTDMA interface (nxp,smartdma)

    • Added support for more OmniVision OV2640 controls (ovti,ov2640)

    • Added support for more OmniVision OV5640 controls (ovti,ov5640)

    • STM32: Implemented video_get_ctrl() and video_set_ctrl() APIs.

    • Removed an init order circular dependency for the camera pipeline on NXP RT10xx platforms (GitHub #80304)

    • Added an NXP’s smartdma based video driver (nxp,video-smartdma)

    • Added frame interval APIs to support variable frame rates (video_sw_generator.c)

    • Added image controls to the OV5640 driver

  • W1

    • Added 1-Wire master driver for Analog Devices MAX32 SoC series (adi,max32-w1)

  • Watchdog

    • Added driver for Analog Devices MAX32 SoC series (adi,max32-watchdog).

    • Converted NXP S32 Software Watchdog Timer driver to native Zephyr code

  • Wi-Fi

    • Add Wi-Fi Easy Connect (DPP) support.

    • Add support for Wi-Fi credentials library.

    • Add enterprise support for station.

    • Add Wi-Fi snippet support for networking samples.

    • Add build testing for various Wi-Fi config combinations.

    • Add regulatory domain support to Wi-Fi shell.

    • Add WPS support to Wi-Fi shell.

    • Add 802.11r connect command usage in Wi-Fi shell.

    • Add current PHY rate to hostap status message.

    • Allow user to reset Wi-Fi statistics in Wi-Fi shell.

    • Display RTS threshold in Wi-Fi shell.

    • Fix SSID array length size in scanning results.

    • Fix the “wifi ap config” command using the STA interface instead of SAP interface.

    • Fix memory leak in hostap when doing a disconnect.

    • Fix setting of frequency band both in AP and STA mode in Wi-Fi shell.

    • Fix correct channel scan range in Wi-Fi 6GHz.

    • Fix scan results printing in Wi-Fi shell.

    • Increase main and shell stack sizes for Wi-Fi shell sample.

    • Increase the maximum count of connected STA to 8 in Wi-Fi shell.

    • Relocate AP and STA Wi-Fi sample to samples/net/wifi directory.

    • Run Wi-Fi tests together with network tests.

    • Updated ESP32 Wi-Fi driver to reflect actual negotiated PHY mode.

    • Add ESP32-C2 Wi-Fi support.

    • Add ESP32 driver APSTA support.

    • Add NXP RW612 driver support.

    • Added nRF70 Wi-Fi driver.

Networking

  • 802.15.4:

    • Implemented support for beacons without association bit.

    • Implemented support for beacons payload.

    • Fixed a bug where LL address endianness was swapped twice when deciphering a frame.

    • Fixed missing context lock release when checking destination address.

    • Improved error logging in 6LoWPAN fragmentation.

    • Improved error logging in 802.15.4 management commands.

  • ARP:

    • Fixed ARP probe verification during IPv4 address conflict detection.

  • CoAP:

    • Added new API coap_rst_init() to simplify creating RST replies.

    • Implemented replying with CoAP RST response for unknown queries in CoAP client.

    • Added support for runtime configuration of ACK random factor parameter.

    • Added support for No Response CoAP option.

    • Added a new sample demonstrating downloading a resource with GET request.

    • Fixed handling of received CoAP RST reply in CoAP client.

    • Fixed socket error reporting to the application in CoAP client.

    • Fixed handling of response retransmissions in CoAP client.

    • Fixed a bug where CoAP block numbers were limited to uint8_t.

    • Various fixes in the block transfer support in CoAP client.

    • Improved handling of truncated datagrams in CoAP client.

    • Improved thread safety of CoAP client.

    • Fixed missing static keyword in some internal functions.

    • Various other minor fixes in CoAP client.

  • DHCPv4:

    • Added support for parsing multiple DNS servers received from DHCP server.

    • Added support for DNS Server option in DHCPv4 server.

    • Added support for Router option in DHCPv4 server.

    • Added support for application callback which allows to assign custom addresses in DHCPv4 server.

    • Fixed DNS server list allocation in DHCPv4 client.

    • Fixed a bug where system workqueue could be blocked indefinitely by DHCPv4 client.

  • DHCPv6:

    • Fixed a bug where system workqueue could be blocked indefinitely by DHCPv6 client.

  • DNS/mDNS/LLMNR:

    • Added support for collecting DNS statistics.

    • Added support for more error codes in zsock_gai_strerror().

    • Fixed handling of DNS responses encoded with capital letters.

    • Fixed DNS dispatcher operation on multiple network interfaces.

    • Fixed error being reported for mDNS queries with query count equal to 0.

    • Various other minor fixes in DNS/mDNS implementations.

  • Ethernet:

  • gPTP/PTP:

    • Fixed handling of second overflow/underflow.

    • Fixed PTP clock adjusting with offset.

  • HTTP:

    • Added support for specifying response headers and response code by the application.

    • Added support for netusb in the HTTP server sample.

    • Added support for accessing HTTP request headers from the application callback.

    • Added support for handling IPv4 connections over IPv6 socket in HTTP server.

    • Added support for creating HTTP server instances without specifying local host.

    • Added overlays to support HTTP over IEEE 802.15.4 for HTTP client and server samples.

    • Added support for static filesystem resources in HTTP server.

    • Fixed assertion in HTTP server sample when resource upload was aborted.

    • Refactored dynamic resource callback format for easier handling of short requests/replies.

    • Fixed possible busy-looping in case of errors in the HTTP server sample.

    • Fixed possible incorrect HTTP headers matching in HTTP server.

    • Refactored HTTP server sample to better demonstrate server use cases.

    • Fixed processing of multiple HTTP/1 requests over the same connection.

    • Improved HTTP server test coverage.

    • Various other minor fixes in HTTP server.

  • IPv4:

    • Improved IGMP test coverage.

    • Fixed IGMPv2 queries processing when IGMPv3 is enabled.

    • Fixed CONFIG_NET_NATIVE_IPV4 dependency for native IPv4 options.

    • Fix net_pkt leak in send_ipv4_fragment().`

    • Fixed tx_pkts slab leak in send_ipv4_fragment

  • IPv6:

    • Added a public header for Multicast Listener Discovery APIs.

    • Added new net_ipv6_addr_prefix_mask() API function.

    • Made IPv6 Router Solicitation timeout configurable.

    • Fixed endless IPv6 packet looping with both routing and VLAN support enabled.

    • Fixed unneeded error logging in case of dropped NS packets.

    • Fixed accepting of incoming DAD NS messages.

    • Various fixes improving IPv6 routing.

    • Added onlink and forwarding check to IPv6-prepare

  • LwM2M:

    • Location object: optional resources altitude, radius, and speed can now be used optionally as per the location object’s specification. Users of these resources will now need to provide a read buffer.

    • Added TLS_ECDHE_ECDSA_WITH_AES_128_CCM_8 to DTLS cipher list.

    • Added LwM2M shell command for listing resources.

    • Added LwM2M shell command to list observations.

    • Added support for accepting SenML-CBOR floats decoded as integers.

    • Added support for X509 hostname verification if using certificates, when URI contains valid name.

    • Regenerated generated code files using zcbor 0.9.0 for lwm2m_senml_cbor.

    • Improved thread safety of the LwM2M engine.

    • Fixed block transfer issues for composite operations.

    • Fixed enabler version reporting during bootstrap discovery.

    • Removed unneeded Security object instance from the LwM2M client sample.

    • Fixed buffer size check for U16 resource.

    • Removed deprecated APIs and configs.

    • Optional Location object resources altitude, radius, and speed can now be used optionally as per the location object’s specification. Users of these resources will now need to provide a read buffer.

    • Fixed the retry counter not being reset on successful Registration update.

    • Fixed REGISTRATION_TIMEOUT event not always being emitted on registration errors.

    • Fixed c++ support in LwM2M public header.

    • Fixed a bug where DISCONNECTED event was not always emitted when needed.

  • Misc:

    • Added support for network packet allocation statistics.

    • Added a new library implementing Prometheus monitoring support.

    • Added USB CDC NCM support for Echo Server sample.

    • Added packet drop statistics for capture interfaces.

    • Added new net_hostname_set_postfix_str() API function to set hostname postfix in non-hexadecimal format.

    • Added API version information to public networking headers.

    • Implemented optional periodic SNTP time resynchronization.

    • Improved error reporting when starting/stopping virtual interfaces.

    • Fixed build error of packet capture library when variable sized buffers are used.

    • Fixed build error of packet capture library when either IPv4 or IPv6 is disabled.

    • Fixed CMake complaint about missing sources in net library in certain configurations.

    • Fixed compilation issues with networking and SystemView Tracing enabled.

    • Removed redundant DHCPv4 code from telnet sample.

    • Fixed build warnings in Echo Client sample with IPv6 disabled.

    • Extended network tracing support and added documentation page (Network Tracing).

    • Moved network buffers implementation out of net subsystem into lib directory

    • Removed wpansub sample.

  • MQTT:

    • Updated information in the mqtt_publisher sample about Mosquitto broker configuration.

    • Updated MQTT tests to be self-contained, no longer requiring external broker.

    • Optimized buffer handling in MQTT encoder/decoder.

  • Network contexts:

  • Network Interface:

    • Added new net_if_ipv4_get_gw() API function.

    • Fixed checksum offloading checks for VLAN interfaces.

    • Fixed native IP support being required to register IP addresses on an interface.

    • Fixed missing mutex locks in a few net_if functions.

    • Fixed rejoining of IPv6 multicast groups.

    • Fixed net_if_send_data() operation for offloaded interfaces.

    • Fixed needless IPv6 multicast groups joining if IPv6 is disabled.

    • Fixed compiler warnings when building with -Wtype-limits.

  • OpenThread:

  • Shell:

    • Added support for enabling/disabling individual network shell commands with Kconfig.

    • Added new net dhcpv4/6 client commands for DHCPv4/6 client management.

    • Added new net virtual commands for virtual interface management.

    • net ipv4/6 commands are now available even if native IP stack is disabled.

    • Added new net cm commands exposing Connection Manager functionality.

    • Fixed possible assertion if telnet shell backend connection is terminated.

    • Event monitor thread stack size is now configurable with Kconfig.

    • Relocated bridge command under net command, i. e. net bridge.

    • Multiple minor improvements in various command outputs.

  • Sockets:

    • Added dedicated net_socket_service_handler_t callback function type for socket services.

    • Added TLS 1.3 support for TLS sockets.

    • Fixed socket leak when closing NSOS socket.

    • Moved socket service library out of experimental.

    • Deprecated CONFIG_NET_SOCKETS_POLL_MAX.

    • Moved zsock_poll() and zsock_select implementations into zvfs library.

    • Removed work_q parameter from socket service macros as it was no longer used.

    • Separated native INET sockets implementation from socket syscalls so that it doesn’t have to be built when offloaded sockets are used.

    • Fixed possible infinite block inside TLS socket zsock_connect() when peer goes down silently.

    • Fixed msg_controllen not being set correctly in zsock_recvmsg().

    • Fixed possible busy-looping when polling TLS socket for POLLOUT event.

  • TCP:

    • Fixed propagating connection errors to the socket layer.

    • Improved ACK reply logic when peer does not send PSH flag with data.

  • Websocket:

    • Added support for Websocket console in the Echo Server sample.

    • Fixed undefined reference to MSG_DONTWAIT while building websockets without POSIX.

  • Wi-Fi:

    • Add a 80211R fast BSS transition argument usage to the wifi shell’s connect command.

    • Fixed the shell’s ap config command using the sta interface area

    • Added AP configuration cmd support to the NXP Wifi drivers

    • Fixed the dormant state in the NXP WiFi driver to be set to off once a connection to an AP is achieved

  • zperf:

    • Added support for USB CDC NCM in the zperf sample.

    • Fixed DHCPv4 client not being started in the zperf sample in certain configurations.

USB

  • New USB device stack:

    • Added USB CDC Network Control Model implementation

    • Enhanced USB Audio class 2 implementation

    • Made USB device stack high-bandwidth aware

    • Enhanced CDC ACM and HID class implementations

Devicetree

Kconfig

Libraries / Subsystems

  • Debug

    • Added west runner for probe-rs, a Rust-based embedded toolkit.

  • Demand Paging

    • Added LRU (Least Recently Used) eviction algorithm.

    • Added on-demand memory mapping support (CONFIG_DEMAND_MAPPING).

    • Made demand paging SMP compatible.

  • Management

    • MCUmgr

    • hawkBit

      • hawkbit_autohandler() now takes one argument. If the argument is set to true, the autohandler will reshedule itself after running. If the argument is set to false, the autohandler will not reshedule itself. Both variants are scheduled independent of each other. The autohandler always runs in the system workqueue.

      • Use the hawkbit_autohandler_wait() function to wait for the autohandler to finish.

      • Running hawkBit from the shell is now executed in the system workqueue.

      • Use the hawkbit_autohandler_cancel() function to cancel the autohandler.

      • Use the hawkbit_autohandler_set_delay() function to delay the next run of the autohandler.

      • The hawkBit header file was separated into multiple header files. The main header file is now <zephyr/mgmt/hawkbit/hawkbit.h>, the autohandler header file is now <zephyr/mgmt/hawkbit/autohandler.h> and the configuration header file is now <zephyr/mgmt/hawkbit/config.h>.

  • Power management

    • Added initial ESP32-C6 power management interface to allow light and deep-sleep features.

  • Crypto

  • SD

    • No significant changes in this release

  • Settings

    • Settings has been extended to allow prioritizing the commit handlers using SETTINGS_STATIC_HANDLER_DEFINE_WITH_CPRIO(...) for static_handlers and settings_register_with_cprio(...) for dynamic_handlers.

  • Shell:

    • Reorganized the kernel threads and kernel stacks shell command under the L1 kernel thread shell command as kernel thread list & kernel thread stacks

    • Added multiple shell command to configure the CPU mask affinity / pinning a thread in runtime, do kernel thread -h for more info.

    • kernel reboot shell command without any additional arguments will now do a cold reboot instead of requiring you to type kernel reboot cold.

  • Storage

    • LittleFS: The module has been updated with changes committed upstream from version 2.8.1, the last module update, up to and including the released version 2.9.3.

    • Fixed static analysis error caused by mismatched variable assignment in NVS

    • LittleFS: Fixed an issue where the DTS option for configuring block cycles for LittleFS instances was ignored (GitHub #79072).

    • LittleFS: Fixed issue with lookahead buffer size mismatch to actual allocated buffer size (GitHub #77917).

    • FAT FS: Added CONFIG_FILE_SYSTEM_LIB_LINK to allow linking file system support libraries without enabling the File System subsystem. This option can be used when a user wants to directly use file system libraries, bypassing the File System subsystem.

    • FAT FS: Added CONFIG_FS_FATFS_LBA64 to enable support for the 64-bit LBA and GPT in FAT file system driver.

    • FAT FS: Added CONFIG_FS_FATFS_MULTI_PARTITION that enables support for devices partitioned with GPT or MBR.

    • FAT FS: Added CONFIG_FS_FATFS_HAS_RTC that enables RTC usage for time-stamping files on FAT file systems.

    • FAT FS: Added CONFIG_FS_FATFS_EXTRA_NATIVE_API that enables additional FAT file system driver functions, which are not exposed via Zephyr File System subsystem, for users that intend to directly call them in their code.

    • Stream Flash: Fixed an issue where stream_flash_erase_page() did not properly check the requested erase range and possibly allowed erasing any page on a device (GitHub #79800).

    • Shell: Fixed an issue were a failed file system mount attempt using the shell would make it impossible to ever succeed in mounting that file system again until the device was reset (GitHub #80024).

    • ZMS: Introduction of a new storage system that is designed to work with all types of non-volatile storage technologies. It supports classical on-chip NOR flash as well as new technologies like RRAM and MRAM that do not require a separate erase operation at all.

  • Task Watchdog

  • Tracing

    • Added support for a “user event” trace, with the purpose to allow driver or application developers to quickly add tracing for events for debug purposes

  • POSIX API

  • LoRa/LoRaWAN

  • ZBus

  • JWT (JSON Web Token)

  • Firmware

    • Introduced basic support for ARM’s System Control and Management Interface, which includes:

      • Subset of clock management protocol commands

      • Subset of pin control protocol commands

      • Shared memory and mailbox-based transport

HALs

  • Nordic

    • Updated nrfx to version 3.7.0.

    • Added OS agnostic parts of the nRF70 Wi-Fi driver.

  • STM32

    • Updated STM32C0 to cube version V1.2.0.

    • Updated STM32F1 to cube version V1.8.6.

    • Updated STM32F2 to cube version V1.9.5.

    • Updated STM32F4 to cube version V1.28.1.

    • Updated STM32G4 to cube version V1.6.0.

    • Updated STM32H5 to cube version V1.3.0.

    • Updated STM32H7 to cube version V1.11.2.

    • Updated STM32H7RS to cube version V1.1.0.

    • Added STM32U0 Cube package (1.1.0)

    • Updated STM32U5 to cube version V1.6.0.

    • Updated STM32WB to cube version V1.20.0.

    • Added STM32WB0 Cube package (1.0.0)

    • Updated STM32WBA to cube version V1.4.1.

  • ADI

  • Espressif

    • Synced HAL to version v5.1.4 to update SoCs low level files, RF libraries and overall driver support.

  • NXP

    • Updated the MCUX HAL to the SDK version 2.16.000

    • Updated the NXP S32ZE HAL drivers to version 2.0.0

  • Silabs

    • Updated Series 2 to Simplicity SDK 2024.6, while Series 0/1 continue to use Gecko SDK 4.4.

MCUboot

  • Removed broken target config header feature.

  • Removed image_index from boot_encrypt.

  • Renamed boot_enc_decrypt to boot_decrypt_key.

  • Updated to use EXTRA_CONF_FILE instead of the deprecated OVERLAY_CONFIG argument.

  • Updated boot_encrypt() to instead be boot_enc_encrypt() and boot_enc_decrypt().

  • Updated boot_enc_valid to take slot instead of image index.

  • Updated boot_enc_load() to take slot number instead of image.

  • Updated logging to debug level in boot_serial.

  • Updated Kconfig to allow disabling NRFX_WDT on nRF devices.

  • Updated CMake ERROR statements into FATAL_ERROR.

  • Added application version that is being booted output prior to booting it.

  • Added sysbuild support to the hello-world sample.

  • Added SIG_PURE TLV to bootutil.

  • Added write block size checking to bootutil.

  • Added check for unexpected flash sector size.

  • Added SHA512 support to MCUboot code and support for calculating SHA512 hash in imgtool.

  • Added fallback to USB DFU option.

  • Added better mode selection checks to bootutil.

  • Added bootutil protected TLV size to image size check.

  • Added functionality to remove images with conflicting flags or where features are required that are not supported.

  • Added compressed image flags and TLVs to MCUboot, Kconfig options and support for generating compressed LZMA2 images with ARM thumb filter to imgtool.

  • Added image header verification before checking image.

  • Added state to boot_is_header_valid() function.

  • Added CONFIG_MCUBOOT_ENC_BUILTIN_KEY Kconfig option.

  • Added non-bootable flag to imgtool.

  • Added zephyr prefix to generated header path.

  • Added optional img mgmt slot info feature.

  • Added bootutil support for maximum image size details for additional images.

  • Added support for automatically calculating max sectors.

  • Added missing boot_enc_init() function.

  • Added support for keeping image encrypted in scratch area in bootutil.

  • Fixed serial recovery for NXP IMX.RT, LPC55x and MCXNx platforms

  • Fixed issue with public RSA signing in imgtool.

  • Fixed issue with boot_serial_enter() being defined but not used warning.

  • Fixed issue with main() in sample returning wrong type warning.

  • Fixed issue with using pointers in bootutil.

  • Fixed wrong usage of slot numbers in boot_serial.

  • Fixed slot info for directXIP/RAM load in bootutil.

  • Fixed bootutil issue with not zeroing AES and SHA-256 contexts with mbedTLS.

  • Fixed boot_serial format and incompatible-pointer-types warnings.

  • Fixed bootutil wrong definition of find_swap_count.

  • Fixed bootutil swap move max app size calculation.

  • Fixed imgtool issue where getpub failed for ed25519 key.

  • Fixed issue with sysbuild if something else is named mcuboot.

  • Fixed RAM load chain load address.

  • Fixed issue with properly retrieving image headers after interrupted swap-scratch in bootutil.

  • The MCUboot version in this release is version 2.1.0+0-dev.

  • Add the following nxp boards as test targets area: frdm_ke17z, frdm_ke17z512, rddrone_fmuk66, twr_ke18f, frdm_mcxn947/mcxn947/cpu0

OSDP

Trusted Firmware-M (TF-M)

Nanopb

LVGL

  • Added definition of LV_ATTRIBUTE_MEM_ALIGN so library internal data structures can be aligned to a specific boundary.

  • Provided alignment definition to accommodate the alignment requirement of some GPU’s

zcbor

Tests and Samples

  • Together with the deprecation of native_posix, many tests which were explicitly run in native_posix now run in native_sim instead. native_posix as a platform remains tested though.

  • Extended the tests of counter_basic_api with a testcase for counters without alarms

  • Added support for testing SDMMC devices to the fatfs API test

  • Extended net/vlan to add IPv6 prefix config to each vlan-iface

  • Enhanced the camera fixture test by adding a color bar to enable automation

  • Added a number crunching (maths such as FFT, echo cancellation) sample using an optimized library for the NXP ADSP board

  • Tailored the SPI_LOOPBACK test to the limitations of NXP Kinetis MCU’s

  • Enabled the video sample to run video capture (samples/drivers/video)

  • Added SMF Calculator sample demonstrating the usage of the State Machine framework in combination with LVGL to create a simple calculator application.

  • Consolidated display sample where possible to use a single testcase for all shields