Documentation/ABI/testing/sysfs-driver-samsung-laptop

Source file repositories/reference/linux-study-clean/Documentation/ABI/testing/sysfs-driver-samsung-laptop

File Facts

System
Linux kernel
Corpus path
Documentation/ABI/testing/sysfs-driver-samsung-laptop
Extension
[no extension]
Size
1408 bytes
Lines
38
Domain
Support Tooling And Documentation
Bucket
Documentation
Inferred role
Support Tooling And Documentation: Documentation
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

What:		/sys/devices/platform/samsung/performance_level
Date:		January 1, 2010
KernelVersion:	2.6.33
Contact:	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Description:	Some Samsung laptops have different "performance levels"
		that can be modified by a function key, and by this
		sysfs file.  These values don't always make a whole lot
		of sense, but some users like to modify them to keep
		their fans quiet at all costs.  Reading from this file
		will show the current performance level.  Writing to the
		file can change this value.

			Valid options:
				- "silent"
				- "normal"
				- "overclock"

		Note that not all laptops support all of these options.
		Specifically, not all support the "overclock" option,
		and it's still unknown if this value even changes
		anything, other than making the user feel a bit better.

What:		/sys/devices/platform/samsung/usb_charge
Date:		December 1, 2011
KernelVersion:	3.3
Contact:	Corentin Chary <corentin.chary@gmail.com>
Description:	Use your USB ports to charge devices, even
		when your laptop is powered off.
		1 means enabled, 0 means disabled.

What:		/sys/devices/platform/samsung/lid_handling
Date:		December 11, 2014
KernelVersion:	3.19
Contact:	Julijonas Kikutis <julijonas.kikutis@gmail.com>
Description:	Some Samsung laptops handle lid closing quicker and
		only handle lid opening with this mode enabled.
		1 means enabled, 0 means disabled.

Annotation

Implementation Notes