Surface System Aggregator Module Bus

configname: CONFIG_SURFACE_AGGREGATOR_BUS

Linux Kernel Configuration
└─>Device Drivers
└─>Microsoft Surface Platform-Specific Device Drivers
└─>Microsoft Surface System Aggregator Module Subsystem and Drivers
└─>Surface System Aggregator Module Bus
In linux kernel since version 5.2 (release Date: 2019-07-07)  
Expands the Surface System Aggregator Module (SSAM) core driver by
providing a dedicated bus and client-device type.

This bus and device type are intended to provide and simplify support
for non-platform and non-ACPI SSAM devices, i.e. SSAM devices that are
not auto-detectable via the conventional means (e.g. ACPI).