Intel Dynamic SAR control for M.2 WWAN modems (INTC1092)
Platform glue for Intel cellular M.2 modems found in WWAN-equipped laptops, exposing the firmware's Dynamic SAR (Specific Absorption Rate) controls so the system can adjust radio transmit power based on proximity sensors and regulatory regions. OEMs such as HP ship it under the "Wireless CCD" name on business laptops with built-in 4G/5G modems.
recommendation
Worth keeping but documenting as a niche feature: it serves a small slice of laptops (those with Intel WWAN modems and dynamic SAR), but the code is actively maintained, received fixes and cleanups as recently as 2023, and exposes a documented sysfs interface that userspace tooling depends on. OEM driver packages dated 2025 suggest the underlying hardware is still being sold, so removal would risk breaking real systems despite the limited deployment footprint.
repository signals
sources
- lists.openwall.net
Upstream patch traffic for int1092 was still landing in 2023, including a functional ACPI _DSM fix for this driver.
- spinics.net
The driver also saw platform/x86 maintenance cleanup in 2023, indicating it is not abandoned in-tree.
- cateee.net
LKDDb shows CONFIG_INTEL_SAR_INT1092 present from Linux 5.15 through current HEAD and bound to ACPI ID INTC1092 as module intel_sar.
- docs.kernel.org
Kernel documentation carries a testing ABI entry for /sys/bus/platform/devices/INTC1092:00/intc_reg and intc_data, showing an exposed userspace contract.
- treexy.com
ACPI\INTC1092 appears in OEM Windows driver distribution as 'Wireless CCD' with 2025-dated HP packages, suggesting continuing OEM deployment on WWAN-capable laptops into 2025.
codex reasoning notes (technical)
Local inspection via exec_command showed a real platform driver with ACPI match INTC1092 and SAR/WWAN sysfs hooks, for Intel M.2 modem dynamic SAR control. Lore-oriented web searches surfaced maintenance/fix patches in 2023 but no removal discussion; that argues against deprecation. The LKDDb page was obtained by web search and confirms the driver remains enabled through current kernel HEAD. The kernel ABI page was obtained by web search and shows published sysfs ABI, so removal would risk userspace breakage. The HP Wireless CCD page was obtained by web search; it is weaker than a vendor product matrix but is useful deployment evidence that INTC1092-backed hardware was still shipping/supporting systems in 2025. Overall this looks niche but live: keep the driver, annotate it as low-deployment WWAN laptop support rather than broadly used platform code.