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Diffstat (limited to 'drivers/platform/surface/aggregator/Kconfig')
| -rw-r--r-- | drivers/platform/surface/aggregator/Kconfig | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/drivers/platform/surface/aggregator/Kconfig b/drivers/platform/surface/aggregator/Kconfig new file mode 100644 index 000000000..c114f9dd5 --- /dev/null +++ b/drivers/platform/surface/aggregator/Kconfig @@ -0,0 +1,69 @@ +# SPDX-License-Identifier: GPL-2.0+ +# Copyright (C) 2019-2022 Maximilian Luz <luzmaximilian@gmail.com> + +menuconfig SURFACE_AGGREGATOR + tristate "Microsoft Surface System Aggregator Module Subsystem and Drivers" + depends on SERIAL_DEV_BUS + depends on ACPI + select CRC_CCITT + help + The Surface System Aggregator Module (Surface SAM or SSAM) is an + embedded controller (EC) found on 5th- and later-generation Microsoft + Surface devices (i.e. Surface Pro 5, Surface Book 2, Surface Laptop, + and newer, with exception of Surface Go series devices). + + Depending on the device in question, this EC provides varying + functionality, including: + - EC access from ACPI via Surface ACPI Notify (5th- and 6th-generation) + - battery status information (all devices) + - thermal sensor access (all devices) + - performance mode / cooling mode control (all devices) + - clipboard detachment system control (Surface Book 2 and 3) + - HID / keyboard input (Surface Laptops, Surface Book 3) + + This option controls whether the Surface SAM subsystem core will be + built. This includes a driver for the Surface Serial Hub (SSH), which + is the device responsible for the communication with the EC, and a + basic kernel interface exposing the EC functionality to other client + drivers, i.e. allowing them to make requests to the EC and receive + events from it. Selecting this option alone will not provide any + client drivers and therefore no functionality beyond the in-kernel + interface. Said functionality is the responsibility of the respective + client drivers. + + Note: While 4th-generation Surface devices also make use of a SAM EC, + due to a difference in the communication interface of the controller, + only 5th and later generations are currently supported. Specifically, + devices using SAM-over-SSH are supported, whereas devices using + SAM-over-HID, which is used on the 4th generation, are currently not + supported. + + Choose m if you want to build the SAM subsystem core and SSH driver as + module, y if you want to build it into the kernel and n if you don't + want it at all. + +config SURFACE_AGGREGATOR_BUS + bool "Surface System Aggregator Module Bus" + depends on SURFACE_AGGREGATOR + default y + help + 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). + +config SURFACE_AGGREGATOR_ERROR_INJECTION + bool "Surface System Aggregator Module Error Injection Capabilities" + depends on SURFACE_AGGREGATOR + depends on FUNCTION_ERROR_INJECTION + help + Provides error-injection capabilities for the Surface System + Aggregator Module subsystem and Surface Serial Hub driver. + + Specifically, exports error injection hooks to be used with the + kernel's function error injection capabilities to simulate underlying + transport and communication problems, such as invalid data sent to or + received from the EC, dropped data, and communication timeouts. + Intended for development and debugging. |