DART-6UL changelog¶
Murata Type 2DL/2EL Wireless Module Firmware Requirement (February 2026)¶
Component Change Notice
NXP changed the IW611 IC fabrication source from TSMC to UMC. The Murata module MPN did not change.
SOMs with Murata Type 2DL or Type 2EL wireless modules shipped from the beginning of February 2026 require NXP firmware released after April 2025. Firmware versions released before April 2025 are not compatible with the UMC-manufactured IW611 IC.
| Affected Wireless Modules | Affected Shipments | Minimum Supported Firmware |
|---|---|---|
| Murata Type 2DL / Type 2EL | Beginning of February 2026 | 18.99.3.p23.20 |
The firmware update also requires that the Wi-Fi driver, btnxpuart driver and OpenThread userspace utility are updated. This update is backwards compatible with modules shipped prior to February 2026.
Software Requirement
Use a Variscite software release based on NXP 6.12.20 or newer. This includes updates to the following packages:
- Wi-Fi firmware version
18.99.3.p23.20 - Wi-Fi driver version
MM6X18537.p9 btnxpuartdriver- OpenThread userspace utility
| Release / Branch | Required Update |
|---|---|
| Yocto Scarthgap 6.6.52-2.2.0 | variscite-bsp-platform@496d8ee9a or newer |
| Yocto Kirkstone 5.15.71-2.2.0 | variscite-bsp-platform@0ec4d7a7 or newer |
| Debian Bookworm | flexbuild@2b4cb98c or newer |
DART-6UL V1.3 & DART-6UL-5G V2.1¶
Hardware Changes¶
Due to EOL the Cirrus Logic WM8731 is replaced by the Cirrus Logic WM8904 codec.
| Old Manufacturer | Old MPN | New Manufacturer | New MPN |
|---|---|---|---|
| Cirrus Logic | WM8731 | Cirrus Logic | WM8904 |
Software Changes¶
NOTE
Variscite is updating all relevant software repositories and recommends impacted users to upgrade to the latest software version or to update their U-Boot and kernel to the latest commit ID of the branch they are already based on.
The following are the relevant patches:
Yocto Kirkstone (kernel 5.15.71)¶
| Release | U-Boot | Kernel | meta-layer(s) |
|---|---|---|---|
| Yocto Kirkstone |
Yocto Hardknott (kernel 5.10.72)¶
| Release | U-Boot | Kernel | meta-layer(s) |
|---|---|---|---|
| Yocto Hardknott |
Yocto Dunfell and Debian Bullseye (kernel 5.4.142)¶
| Release | U-Boot | Kernel | meta-layer(s) |
|---|---|---|---|
| Yocto Dunfell | |||
| Debian Bullseye |
Yocto Zeus and B2Qt Zeus (kernel 5.4.3)¶
| Release | U-Boot | Kernel | meta-layer(s) |
|---|---|---|---|
| Yocto Zeus | |||
| B2Qt Zeus |
Yocto Thud, Debian Buster R01, Debian Stretch R03, and B2Qt Thud (kernel 4.14.78)¶
| Release | U-Boot | Kernel | meta-layer(s) |
|---|---|---|---|
| Yocto Thud |
|
||
| Debian Buster R01 | TBD. | TBD. | TBD. |
| Debian Stretch R03 | TBD. | TBD. | TBD. |
| B2Qt Thud | TBD. | TBD. | TBD. |
Yocto Sumo and Debian Stretch R02 (kernel 4.9.88)¶
| Release | U-Boot | Kernel | meta-layer(s) |
|---|---|---|---|
| Yocto Sumo |
|
||
| Debian Stretch R02 | TBD. | TBD. | TBD. |
Yocto Rocko and Debian Stretch R01 (4.9.11)¶
| Release | U-Boot | Kernel | meta-layer(s) |
|---|---|---|---|
| Yocto Rocko | |||
| Debian Stretch R01 | TBD. | TBD. | TBD. |
Yocto Pyro (kernel 4.1.15)¶
| Release | U-Boot | Kernel | meta-layer(s) |
|---|---|---|---|
| Yocto Pyro | TBD. | TBD. | TBD. |
Yocto Morty, Debian Jessie R03, and B2Qt Morty (kernel 4.1.15)¶
Krogoth Release 02 (kernel 4.1.15)¶
| Release | U-Boot | Kernel | meta-layer(s) |
|---|---|---|---|
| Krogoth Release 02 |
DART-6UL-5G V2.2¶
Hardware Changes¶
Redesigned SOM to support Murata WiFi module¶
| Previous Manufacturer | Previous MPN | Updated Manufacturer | Updated MPN |
|---|---|---|---|
| Infineon | CYW43353 / CYW4343W | Murata | LBES5PL2EL-SMP / LBEE5PL2DL-SMP |
Software Changes¶
NOTE
Variscite is updating all relevant software repositories and recommends impacted users to upgrade to the latest software version or to update their U-Boot and kernel to the latest commit ID of the branch they are already based on.
The following are the relevant patches: