Documentation/ABI/testing/sysfs-driver-ufs

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

File Facts

System
Linux kernel
Corpus path
Documentation/ABI/testing/sysfs-driver-ufs
Extension
[no extension]
Size
72509 bytes
Lines
1794
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/bus/*/drivers/ufshcd/*/auto_hibern8
Date:		March 2018
Contact:	linux-scsi@vger.kernel.org
Description:
		This file contains the auto-hibernate idle timer setting of a
		UFS host controller. A value of '0' means auto-hibernate is not
		enabled. Otherwise the value is the number of microseconds of
		idle time before the UFS host controller will autonomously put
		the link into hibernate state. That will save power at the
		expense of increased latency. Note that the hardware supports
		10-bit values with a power-of-ten multiplier which allows a
		maximum value of 102300000. Refer to the UFS Host Controller
		Interface specification for more details.

What:		/sys/bus/platform/drivers/ufshcd/*/device_descriptor/device_type
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/device_type
Date:		February 2018
Contact:	Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description:	This file shows the device type. This is one of the UFS
		device descriptor parameters. The full information about
		the descriptor could be found at UFS specifications 2.1.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/device_descriptor/device_class
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/device_class
Date:		February 2018
Contact:	Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description:	This file shows the device class. This is one of the UFS
		device descriptor parameters. The full information about
		the descriptor could be found at UFS specifications 2.1.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/device_descriptor/device_sub_class
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/device_sub_class
Date:		February 2018
Contact:	Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description:	This file shows the UFS storage subclass. This is one of
		the UFS device descriptor parameters. The full information
		about the descriptor could be found at UFS specifications 2.1.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/device_descriptor/protocol
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/protocol
Date:		February 2018
Contact:	Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description:	This file shows the protocol supported by an UFS device.
		This is one of the UFS device descriptor parameters.
		The full information about the descriptor could be found
		at UFS specifications 2.1.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/device_descriptor/number_of_luns
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/number_of_luns
Date:		February 2018
Contact:	Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description:	This file shows number of logical units. This is one of
		the UFS device descriptor parameters. The full information
		about the descriptor could be found at UFS specifications 2.1.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/device_descriptor/number_of_wluns
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/number_of_wluns
Date:		February 2018
Contact:	Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description:	This file shows number of well known logical units.

Annotation

Implementation Notes