2018-03-20 21:07:38 +08:00
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What: /sys/bus/*/drivers/ufshcd/*/auto_hibern8
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Date: March 2018
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Contact: linux-scsi@vger.kernel.org
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Description:
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This file contains the auto-hibernate idle timer setting of a
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UFS host controller. A value of '0' means auto-hibernate is not
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enabled. Otherwise the value is the number of microseconds of
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idle time before the UFS host controller will autonomously put
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the link into hibernate state. That will save power at the
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expense of increased latency. Note that the hardware supports
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10-bit values with a power-of-ten multiplier which allows a
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maximum value of 102300000. Refer to the UFS Host Controller
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Interface specification for more details.
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2018-02-15 20:14:02 +08:00
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What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/device_type
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows the device type. This is one of the UFS
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device descriptor parameters. The full information about
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the descriptor could be found at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:02 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/device_class
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows the device class. This is one of the UFS
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device descriptor parameters. The full information about
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the descriptor could be found at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:02 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/device_sub_class
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows the UFS storage subclass. This is one of
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the UFS device descriptor parameters. The full information
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about the descriptor could be found at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:02 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/protocol
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows the protocol supported by an UFS device.
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This is one of the UFS device descriptor parameters.
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The full information about the descriptor could be found
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at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:02 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/number_of_luns
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows number of logical units. This is one of
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the UFS device descriptor parameters. The full information
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about the descriptor could be found at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:02 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/number_of_wluns
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows number of well known logical units.
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This is one of the UFS device descriptor parameters.
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The full information about the descriptor could be found
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at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:02 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/boot_enable
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows value that indicates whether the device is
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enabled for boot. This is one of the UFS device descriptor
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parameters. The full information about the descriptor could
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be found at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:02 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/descriptor_access_enable
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows value that indicates whether the device
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descriptor could be read after partial initialization phase
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of the boot sequence. This is one of the UFS device descriptor
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parameters. The full information about the descriptor could
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be found at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:02 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/initial_power_mode
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows value that defines the power mode after
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device initialization or hardware reset. This is one of
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the UFS device descriptor parameters. The full information
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about the descriptor could be found at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:02 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/high_priority_lun
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows the high priority lun. This is one of
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the UFS device descriptor parameters. The full information
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about the descriptor could be found at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:02 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/secure_removal_type
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows the secure removal type. This is one of
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the UFS device descriptor parameters. The full information
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about the descriptor could be found at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:02 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/support_security_lun
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows whether the security lun is supported.
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This is one of the UFS device descriptor parameters.
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The full information about the descriptor could be found
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at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:02 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/bkops_termination_latency
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows the background operations termination
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latency. This is one of the UFS device descriptor parameters.
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The full information about the descriptor could be found
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at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:02 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/initial_active_icc_level
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows the initial active ICC level. This is one
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of the UFS device descriptor parameters. The full information
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about the descriptor could be found at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:02 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/specification_version
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows the specification version. This is one
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of the UFS device descriptor parameters. The full information
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about the descriptor could be found at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:02 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/manufacturing_date
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows the manufacturing date in BCD format.
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This is one of the UFS device descriptor parameters.
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The full information about the descriptor could be found
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at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:02 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/manufacturer_id
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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docs: typo fixes in Documentation/ABI/
Fix the following typos in the Documentation/ABI/ directory:
- In file obsolete/sysfs-cpuidle, change "obselete" for "obsolete".
- In file removed/sysfs-kernel-uids, change "propotional" for "proportional".
- In directory stable/, fix the following words: "associtated" for "associated",
"hexidecimal" for "hexadecimal", "vlue" for "value", "csed" for "caused" and
"wrtie" for "write". This updates a total of five files.
- In directory testing/, fix the following words: "subystem" for "subsystem",
"isochrnous" for "isochronous", "Desctiptors" for "Descriptors", "picutre" for
"picture", "capture" for "capture", "occured" for "ocurred", "connnected" for
"connected","agressively" for "aggressively","manufacturee" for "manufacturer"
and "transaction" for "transaction", "malformatted" for "incorrectly formated"
,"internel" for "internal", "writtento" for "written to", "specificed" for
"specified", "beyound" for "beyond", "Symetric" for "Symmetric". This updates
a total of eleven files.
Signed-off-by: Carlos Bilbao <bilbao@vt.edu>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/5710038.lOV4Wx5bFT@iron-maiden
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2021-05-13 21:31:10 +08:00
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Description: This file shows the manufacturer ID. This is one of the
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2018-02-15 20:14:02 +08:00
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UFS device descriptor parameters. The full information about
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the descriptor could be found at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:02 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/rtt_capability
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows the maximum number of outstanding RTTs
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supported by the device. This is one of the UFS device
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descriptor parameters. The full information about
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the descriptor could be found at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:02 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/rtc_update
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows the frequency and method of the realtime
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clock update. This is one of the UFS device descriptor
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parameters. The full information about the descriptor
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could be found at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:02 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/ufs_features
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows which features are supported by the device.
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This is one of the UFS device descriptor parameters.
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The full information about the descriptor could be
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found at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:02 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/ffu_timeout
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows the FFU timeout. This is one of the
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UFS device descriptor parameters. The full information
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about the descriptor could be found at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:02 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/queue_depth
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows the device queue depth. This is one of the
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UFS device descriptor parameters. The full information
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about the descriptor could be found at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:02 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/device_version
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows the device version. This is one of the
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UFS device descriptor parameters. The full information
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about the descriptor could be found at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:02 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/number_of_secure_wpa
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows number of secure write protect areas
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supported by the device. This is one of the UFS device
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descriptor parameters. The full information about
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the descriptor could be found at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:02 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/psa_max_data_size
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows the maximum amount of data that may be
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written during the pre-soldering phase of the PSA flow.
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This is one of the UFS device descriptor parameters.
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The full information about the descriptor could be found
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at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:02 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/psa_state_timeout
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows the command maximum timeout for a change
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in PSA state. This is one of the UFS device descriptor
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|
parameters. The full information about the descriptor could
|
|
|
|
|
be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:02 +08:00
|
|
|
The file is read only.
|
2018-02-15 20:14:03 +08:00
|
|
|
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/interconnect_descriptor/unipro_version
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows the MIPI UniPro version number in BCD format.
|
|
|
|
|
This is one of the UFS interconnect descriptor parameters.
|
|
|
|
|
The full information about the descriptor could be found at
|
|
|
|
|
UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:03 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/interconnect_descriptor/mphy_version
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows the MIPI M-PHY version number in BCD format.
|
|
|
|
|
This is one of the UFS interconnect descriptor parameters.
|
|
|
|
|
The full information about the descriptor could be found at
|
|
|
|
|
UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:03 +08:00
|
|
|
The file is read only.
|
2018-02-15 20:14:04 +08:00
|
|
|
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/raw_device_capacity
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows the total memory quantity available to
|
|
|
|
|
the user to configure the device logical units. This is one
|
|
|
|
|
of the UFS geometry descriptor parameters. The full
|
|
|
|
|
information about the descriptor could be found at
|
|
|
|
|
UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:04 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/max_number_of_luns
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows the maximum number of logical units
|
|
|
|
|
supported by the UFS device. This is one of the UFS
|
|
|
|
|
geometry descriptor parameters. The full information about
|
|
|
|
|
the descriptor could be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:04 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/segment_size
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows the segment size. This is one of the UFS
|
|
|
|
|
geometry descriptor parameters. The full information about
|
|
|
|
|
the descriptor could be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:04 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/allocation_unit_size
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows the allocation unit size. This is one of
|
|
|
|
|
the UFS geometry descriptor parameters. The full information
|
|
|
|
|
about the descriptor could be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:04 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/min_addressable_block_size
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows the minimum addressable block size. This
|
|
|
|
|
is one of the UFS geometry descriptor parameters. The full
|
|
|
|
|
information about the descriptor could be found at UFS
|
|
|
|
|
specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:04 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/optimal_read_block_size
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows the optimal read block size. This is one
|
|
|
|
|
of the UFS geometry descriptor parameters. The full
|
|
|
|
|
information about the descriptor could be found at UFS
|
|
|
|
|
specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:04 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/optimal_write_block_size
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows the optimal write block size. This is one
|
|
|
|
|
of the UFS geometry descriptor parameters. The full
|
|
|
|
|
information about the descriptor could be found at UFS
|
|
|
|
|
specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:04 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/max_in_buffer_size
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows the maximum data-in buffer size. This
|
|
|
|
|
is one of the UFS geometry descriptor parameters. The full
|
|
|
|
|
information about the descriptor could be found at UFS
|
|
|
|
|
specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:04 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/max_out_buffer_size
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows the maximum data-out buffer size. This
|
|
|
|
|
is one of the UFS geometry descriptor parameters. The full
|
|
|
|
|
information about the descriptor could be found at UFS
|
|
|
|
|
specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:04 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/rpmb_rw_size
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows the maximum number of RPMB frames allowed
|
|
|
|
|
in Security Protocol In/Out. This is one of the UFS geometry
|
|
|
|
|
descriptor parameters. The full information about the
|
|
|
|
|
descriptor could be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:04 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/dyn_capacity_resource_policy
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows the dynamic capacity resource policy. This
|
|
|
|
|
is one of the UFS geometry descriptor parameters. The full
|
|
|
|
|
information about the descriptor could be found at
|
|
|
|
|
UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:04 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/data_ordering
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows support for out-of-order data transfer.
|
|
|
|
|
This is one of the UFS geometry descriptor parameters.
|
|
|
|
|
The full information about the descriptor could be found at
|
|
|
|
|
UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:04 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/max_number_of_contexts
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows maximum available number of contexts which
|
|
|
|
|
are supported by the device. This is one of the UFS geometry
|
|
|
|
|
descriptor parameters. The full information about the
|
|
|
|
|
descriptor could be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:04 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/sys_data_tag_unit_size
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows system data tag unit size. This is one of
|
|
|
|
|
the UFS geometry descriptor parameters. The full information
|
|
|
|
|
about the descriptor could be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:04 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/sys_data_tag_resource_size
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows maximum storage area size allocated by
|
|
|
|
|
the device to handle system data by the tagging mechanism.
|
|
|
|
|
This is one of the UFS geometry descriptor parameters.
|
|
|
|
|
The full information about the descriptor could be found at
|
|
|
|
|
UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:04 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/secure_removal_types
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows supported secure removal types. This is
|
|
|
|
|
one of the UFS geometry descriptor parameters. The full
|
|
|
|
|
information about the descriptor could be found at
|
|
|
|
|
UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:04 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/memory_types
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows supported memory types. This is one of
|
|
|
|
|
the UFS geometry descriptor parameters. The full
|
|
|
|
|
information about the descriptor could be found at
|
|
|
|
|
UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:04 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/*_memory_max_alloc_units
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows the maximum number of allocation units for
|
|
|
|
|
different memory types (system code, non persistent,
|
|
|
|
|
enhanced type 1-4). This is one of the UFS geometry
|
|
|
|
|
descriptor parameters. The full information about the
|
|
|
|
|
descriptor could be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:04 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/*_memory_capacity_adjustment_factor
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows the memory capacity adjustment factor for
|
|
|
|
|
different memory types (system code, non persistent,
|
|
|
|
|
enhanced type 1-4). This is one of the UFS geometry
|
|
|
|
|
descriptor parameters. The full information about the
|
|
|
|
|
descriptor could be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:04 +08:00
|
|
|
The file is read only.
|
2018-02-15 20:14:05 +08:00
|
|
|
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/health_descriptor/eol_info
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows preend of life information. This is one
|
|
|
|
|
of the UFS health descriptor parameters. The full
|
|
|
|
|
information about the descriptor could be found at
|
|
|
|
|
UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:05 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/health_descriptor/life_time_estimation_a
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows indication of the device life time
|
|
|
|
|
(method a). This is one of the UFS health descriptor
|
|
|
|
|
parameters. The full information about the descriptor
|
|
|
|
|
could be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:05 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/health_descriptor/life_time_estimation_b
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows indication of the device life time
|
|
|
|
|
(method b). This is one of the UFS health descriptor
|
|
|
|
|
parameters. The full information about the descriptor
|
|
|
|
|
could be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:05 +08:00
|
|
|
The file is read only.
|
2018-02-15 20:14:06 +08:00
|
|
|
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/power_descriptor/active_icc_levels_vcc*
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows maximum VCC, VCCQ and VCCQ2 value for
|
|
|
|
|
active ICC levels from 0 to 15. This is one of the UFS
|
|
|
|
|
power descriptor parameters. The full information about
|
|
|
|
|
the descriptor could be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:06 +08:00
|
|
|
The file is read only.
|
2018-02-15 20:14:07 +08:00
|
|
|
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/string_descriptors/manufacturer_name
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
docs: typo fixes in Documentation/ABI/
Fix the following typos in the Documentation/ABI/ directory:
- In file obsolete/sysfs-cpuidle, change "obselete" for "obsolete".
- In file removed/sysfs-kernel-uids, change "propotional" for "proportional".
- In directory stable/, fix the following words: "associtated" for "associated",
"hexidecimal" for "hexadecimal", "vlue" for "value", "csed" for "caused" and
"wrtie" for "write". This updates a total of five files.
- In directory testing/, fix the following words: "subystem" for "subsystem",
"isochrnous" for "isochronous", "Desctiptors" for "Descriptors", "picutre" for
"picture", "capture" for "capture", "occured" for "ocurred", "connnected" for
"connected","agressively" for "aggressively","manufacturee" for "manufacturer"
and "transaction" for "transaction", "malformatted" for "incorrectly formated"
,"internel" for "internal", "writtento" for "written to", "specificed" for
"specified", "beyound" for "beyond", "Symetric" for "Symmetric". This updates
a total of eleven files.
Signed-off-by: Carlos Bilbao <bilbao@vt.edu>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/5710038.lOV4Wx5bFT@iron-maiden
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2021-05-13 21:31:10 +08:00
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Description: This file contains a device manufacturer name string.
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2018-02-15 20:14:07 +08:00
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The full information about the descriptor could be found at
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UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:07 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/string_descriptors/product_name
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file contains a product name string. The full information
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about the descriptor could be found at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:07 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/string_descriptors/oem_id
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file contains a OEM ID string. The full information
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about the descriptor could be found at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:07 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/string_descriptors/serial_number
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file contains a device serial number string. The full
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information about the descriptor could be found at
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UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:07 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/string_descriptors/product_revision
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file contains a product revision string. The full
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information about the descriptor could be found at
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UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:07 +08:00
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The file is read only.
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2018-02-15 20:14:09 +08:00
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What: /sys/class/scsi_device/*/device/unit_descriptor/boot_lun_id
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows boot LUN information. This is one of
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the UFS unit descriptor parameters. The full information
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about the descriptor could be found at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:09 +08:00
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The file is read only.
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What: /sys/class/scsi_device/*/device/unit_descriptor/lun_write_protect
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows LUN write protection status. This is one of
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the UFS unit descriptor parameters. The full information
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about the descriptor could be found at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:09 +08:00
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The file is read only.
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What: /sys/class/scsi_device/*/device/unit_descriptor/lun_queue_depth
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows LUN queue depth. This is one of the UFS
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unit descriptor parameters. The full information about
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the descriptor could be found at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:09 +08:00
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The file is read only.
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What: /sys/class/scsi_device/*/device/unit_descriptor/psa_sensitive
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows PSA sensitivity. This is one of the UFS
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unit descriptor parameters. The full information about
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the descriptor could be found at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:09 +08:00
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The file is read only.
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What: /sys/class/scsi_device/*/device/unit_descriptor/lun_memory_type
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows LUN memory type. This is one of the UFS
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unit descriptor parameters. The full information about
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the descriptor could be found at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:09 +08:00
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The file is read only.
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What: /sys/class/scsi_device/*/device/unit_descriptor/data_reliability
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file defines the device behavior when a power failure
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occurs during a write operation. This is one of the UFS
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unit descriptor parameters. The full information about
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the descriptor could be found at UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:09 +08:00
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The file is read only.
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What: /sys/class/scsi_device/*/device/unit_descriptor/logical_block_size
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows the size of addressable logical blocks
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(calculated as an exponent with base 2). This is one of
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the UFS unit descriptor parameters. The full information about
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the descriptor could be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:09 +08:00
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The file is read only.
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What: /sys/class/scsi_device/*/device/unit_descriptor/logical_block_count
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows total number of addressable logical blocks.
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This is one of the UFS unit descriptor parameters. The full
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information about the descriptor could be found at
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UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:09 +08:00
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The file is read only.
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What: /sys/class/scsi_device/*/device/unit_descriptor/erase_block_size
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows the erase block size. This is one of
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the UFS unit descriptor parameters. The full information
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about the descriptor could be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:09 +08:00
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The file is read only.
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What: /sys/class/scsi_device/*/device/unit_descriptor/provisioning_type
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows the thin provisioning type. This is one of
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the UFS unit descriptor parameters. The full information
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about the descriptor could be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:09 +08:00
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The file is read only.
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What: /sys/class/scsi_device/*/device/unit_descriptor/physical_memory_resourse_count
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows the total physical memory resources. This is
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one of the UFS unit descriptor parameters. The full information
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about the descriptor could be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:09 +08:00
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The file is read only.
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What: /sys/class/scsi_device/*/device/unit_descriptor/context_capabilities
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows the context capabilities. This is one of
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the UFS unit descriptor parameters. The full information
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about the descriptor could be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:09 +08:00
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The file is read only.
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What: /sys/class/scsi_device/*/device/unit_descriptor/large_unit_granularity
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows the granularity of the LUN. This is one of
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the UFS unit descriptor parameters. The full information
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about the descriptor could be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
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|
2018-02-15 20:14:09 +08:00
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The file is read only.
|
2018-02-15 20:14:10 +08:00
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What: /sys/bus/platform/drivers/ufshcd/*/flags/device_init
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows the device init status. The full information
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about the flag could be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:10 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/flags/permanent_wpe
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows whether permanent write protection is enabled.
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The full information about the flag could be found at
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UFS specifications 2.1.
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2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:10 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/flags/power_on_wpe
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows whether write protection is enabled on all
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logical units configured as power on write protected. The
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full information about the flag could be found at
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|
UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
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|
2018-02-15 20:14:10 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/flags/bkops_enable
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows whether the device background operations are
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enabled. The full information about the flag could be
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found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
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|
2018-02-15 20:14:10 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/flags/life_span_mode_enable
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows whether the device life span mode is enabled.
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The full information about the flag could be found at
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UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
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2018-02-15 20:14:10 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/flags/phy_resource_removal
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows whether physical resource removal is enable.
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The full information about the flag could be found at
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|
UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
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|
2018-02-15 20:14:10 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/flags/busy_rtc
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows whether the device is executing internal
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operation related to real time clock. The full information
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about the flag could be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
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|
2018-02-15 20:14:10 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/flags/disable_fw_update
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file shows whether the device FW update is permanently
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disabled. The full information about the flag could be found
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at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
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|
2018-02-15 20:14:10 +08:00
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The file is read only.
|
2018-02-15 20:14:11 +08:00
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What: /sys/bus/platform/drivers/ufshcd/*/attributes/boot_lun_enabled
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file provides the boot lun enabled UFS device attribute.
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The full information about the attribute could be found at
|
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|
UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
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|
2018-02-15 20:14:11 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/attributes/current_power_mode
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file provides the current power mode UFS device attribute.
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The full information about the attribute could be found at
|
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|
UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
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|
2018-02-15 20:14:11 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/attributes/active_icc_level
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file provides the active icc level UFS device attribute.
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The full information about the attribute could be found at
|
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|
UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
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|
2018-02-15 20:14:11 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/attributes/ooo_data_enabled
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file provides the out of order data transfer enabled UFS
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device attribute. The full information about the attribute
|
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|
could be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
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|
2018-02-15 20:14:11 +08:00
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The file is read only.
|
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What: /sys/bus/platform/drivers/ufshcd/*/attributes/bkops_status
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Date: February 2018
|
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|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file provides the background operations status UFS device
|
|
|
|
|
attribute. The full information about the attribute could
|
|
|
|
|
be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:11 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/attributes/purge_status
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file provides the purge operation status UFS device
|
|
|
|
|
attribute. The full information about the attribute could
|
|
|
|
|
be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:11 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/attributes/max_data_in_size
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows the maximum data size in a DATA IN
|
|
|
|
|
UPIU. The full information about the attribute could
|
|
|
|
|
be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:11 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/attributes/max_data_out_size
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows the maximum number of bytes that can be
|
|
|
|
|
requested with a READY TO TRANSFER UPIU. The full information
|
|
|
|
|
about the attribute could be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:11 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/attributes/reference_clock_frequency
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file provides the reference clock frequency UFS device
|
|
|
|
|
attribute. The full information about the attribute could
|
|
|
|
|
be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:11 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/attributes/configuration_descriptor_lock
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows whether the configuration descriptor is locked.
|
|
|
|
|
The full information about the attribute could be found at
|
|
|
|
|
UFS specifications 2.1. The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/attributes/max_number_of_rtt
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file provides the maximum current number of
|
|
|
|
|
outstanding RTTs in device that is allowed. The full
|
|
|
|
|
information about the attribute could be found at
|
|
|
|
|
UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:11 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/attributes/exception_event_control
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file provides the exception event control UFS device
|
|
|
|
|
attribute. The full information about the attribute could
|
|
|
|
|
be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:11 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/attributes/exception_event_status
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file provides the exception event status UFS device
|
|
|
|
|
attribute. The full information about the attribute could
|
|
|
|
|
be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:11 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/attributes/ffu_status
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file provides the ffu status UFS device attribute.
|
|
|
|
|
The full information about the attribute could be found at
|
|
|
|
|
UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:11 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/attributes/psa_state
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file show the PSA feature status. The full information
|
|
|
|
|
about the attribute could be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:11 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/attributes/psa_data_size
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows the amount of data that the host plans to
|
|
|
|
|
load to all logical units in pre-soldering state.
|
|
|
|
|
The full information about the attribute could be found at
|
|
|
|
|
UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:11 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
What: /sys/class/scsi_device/*/device/dyn_cap_needed
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
|
|
|
|
|
Description: This file shows the The amount of physical memory needed
|
|
|
|
|
to be removed from the physical memory resources pool of
|
|
|
|
|
the particular logical unit. The full information about
|
|
|
|
|
the attribute could be found at UFS specifications 2.1.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-02-15 20:14:11 +08:00
|
|
|
The file is read only.
|
2018-03-01 18:48:06 +08:00
|
|
|
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/rpm_lvl
|
|
|
|
|
Date: September 2014
|
|
|
|
|
Contact: Subhash Jadavani <subhashj@codeaurora.org>
|
|
|
|
|
Description: This entry could be used to set or show the UFS device
|
|
|
|
|
runtime power management level. The current driver
|
2021-01-04 23:50:26 +08:00
|
|
|
implementation supports 7 levels with next target states:
|
2020-10-30 15:40:50 +08:00
|
|
|
|
|
|
|
|
== ====================================================
|
2021-01-04 23:50:26 +08:00
|
|
|
0 UFS device will stay active, UIC link will
|
2020-10-30 15:40:50 +08:00
|
|
|
stay active
|
2021-01-04 23:50:26 +08:00
|
|
|
1 UFS device will stay active, UIC link will
|
2020-10-30 15:40:50 +08:00
|
|
|
hibernate
|
2021-01-04 23:50:26 +08:00
|
|
|
2 UFS device will be moved to sleep, UIC link will
|
2020-10-30 15:40:50 +08:00
|
|
|
stay active
|
2021-01-04 23:50:26 +08:00
|
|
|
3 UFS device will be moved to sleep, UIC link will
|
2020-10-30 15:40:50 +08:00
|
|
|
hibernate
|
2021-01-04 23:50:26 +08:00
|
|
|
4 UFS device will be powered off, UIC link will
|
2020-10-30 15:40:50 +08:00
|
|
|
hibernate
|
2021-01-04 23:50:26 +08:00
|
|
|
5 UFS device will be powered off, UIC link will
|
2020-10-30 15:40:50 +08:00
|
|
|
be powered off
|
2021-01-04 23:50:26 +08:00
|
|
|
6 UFS device will be moved to deep sleep, UIC link
|
2021-01-11 18:22:12 +08:00
|
|
|
will be powered off. Note, deep sleep might not be
|
|
|
|
|
supported in which case this value will not be
|
|
|
|
|
accepted
|
2020-10-30 15:40:50 +08:00
|
|
|
== ====================================================
|
2018-03-01 18:48:06 +08:00
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/rpm_target_dev_state
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Subhash Jadavani <subhashj@codeaurora.org>
|
|
|
|
|
Description: This entry shows the target power mode of an UFS device
|
|
|
|
|
for the chosen runtime power management level.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-03-01 18:48:06 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/rpm_target_link_state
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Subhash Jadavani <subhashj@codeaurora.org>
|
|
|
|
|
Description: This entry shows the target state of an UFS UIC link
|
|
|
|
|
for the chosen runtime power management level.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-03-01 18:48:06 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/spm_lvl
|
|
|
|
|
Date: September 2014
|
|
|
|
|
Contact: Subhash Jadavani <subhashj@codeaurora.org>
|
|
|
|
|
Description: This entry could be used to set or show the UFS device
|
|
|
|
|
system power management level. The current driver
|
2021-01-04 23:50:26 +08:00
|
|
|
implementation supports 7 levels with next target states:
|
2020-10-30 15:40:50 +08:00
|
|
|
|
|
|
|
|
== ====================================================
|
2021-01-04 23:50:26 +08:00
|
|
|
0 UFS device will stay active, UIC link will
|
2020-10-30 15:40:50 +08:00
|
|
|
stay active
|
2021-01-04 23:50:26 +08:00
|
|
|
1 UFS device will stay active, UIC link will
|
2020-10-30 15:40:50 +08:00
|
|
|
hibernate
|
2021-01-04 23:50:26 +08:00
|
|
|
2 UFS device will be moved to sleep, UIC link will
|
2020-10-30 15:40:50 +08:00
|
|
|
stay active
|
2021-01-04 23:50:26 +08:00
|
|
|
3 UFS device will be moved to sleep, UIC link will
|
2020-10-30 15:40:50 +08:00
|
|
|
hibernate
|
2021-01-04 23:50:26 +08:00
|
|
|
4 UFS device will be powered off, UIC link will
|
2020-10-30 15:40:50 +08:00
|
|
|
hibernate
|
2021-01-04 23:50:26 +08:00
|
|
|
5 UFS device will be powered off, UIC link will
|
2020-10-30 15:40:50 +08:00
|
|
|
be powered off
|
2021-01-04 23:50:26 +08:00
|
|
|
6 UFS device will be moved to deep sleep, UIC link
|
2021-01-11 18:22:12 +08:00
|
|
|
will be powered off. Note, deep sleep might not be
|
|
|
|
|
supported in which case this value will not be
|
|
|
|
|
accepted
|
2020-10-30 15:40:50 +08:00
|
|
|
== ====================================================
|
2018-03-01 18:48:06 +08:00
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/spm_target_dev_state
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Subhash Jadavani <subhashj@codeaurora.org>
|
|
|
|
|
Description: This entry shows the target power mode of an UFS device
|
|
|
|
|
for the chosen system power management level.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-03-01 18:48:06 +08:00
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/spm_target_link_state
|
|
|
|
|
Date: February 2018
|
|
|
|
|
Contact: Subhash Jadavani <subhashj@codeaurora.org>
|
|
|
|
|
Description: This entry shows the target state of an UFS UIC link
|
|
|
|
|
for the chosen system power management level.
|
2020-10-30 15:40:50 +08:00
|
|
|
|
2018-03-01 18:48:06 +08:00
|
|
|
The file is read only.
|
2020-06-10 01:17:46 +08:00
|
|
|
|
2021-04-22 10:28:39 +08:00
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/monitor/monitor_enable
|
|
|
|
|
Date: January 2021
|
|
|
|
|
Contact: Can Guo <cang@codeaurora.org>
|
|
|
|
|
Description: This file shows the status of performance monitor enablement
|
|
|
|
|
and it can be used to start/stop the monitor. When the monitor
|
|
|
|
|
is stopped, the performance data collected is also cleared.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/monitor/monitor_chunk_size
|
|
|
|
|
Date: January 2021
|
|
|
|
|
Contact: Can Guo <cang@codeaurora.org>
|
|
|
|
|
Description: This file tells the monitor to focus on requests transferring
|
|
|
|
|
data of specific chunk size (in Bytes). 0 means any chunk size.
|
|
|
|
|
It can only be changed when monitor is disabled.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/monitor/read_total_sectors
|
|
|
|
|
Date: January 2021
|
|
|
|
|
Contact: Can Guo <cang@codeaurora.org>
|
|
|
|
|
Description: This file shows how many sectors (in 512 Bytes) have been
|
|
|
|
|
sent from device to host after monitor gets started.
|
|
|
|
|
|
|
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/monitor/read_total_busy
|
|
|
|
|
Date: January 2021
|
|
|
|
|
Contact: Can Guo <cang@codeaurora.org>
|
|
|
|
|
Description: This file shows how long (in micro seconds) has been spent
|
|
|
|
|
sending data from device to host after monitor gets started.
|
|
|
|
|
|
|
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/monitor/read_nr_requests
|
|
|
|
|
Date: January 2021
|
|
|
|
|
Contact: Can Guo <cang@codeaurora.org>
|
|
|
|
|
Description: This file shows how many read requests have been sent after
|
|
|
|
|
monitor gets started.
|
|
|
|
|
|
|
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/monitor/read_req_latency_max
|
|
|
|
|
Date: January 2021
|
|
|
|
|
Contact: Can Guo <cang@codeaurora.org>
|
|
|
|
|
Description: This file shows the maximum latency (in micro seconds) of
|
|
|
|
|
read requests after monitor gets started.
|
|
|
|
|
|
|
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/monitor/read_req_latency_min
|
|
|
|
|
Date: January 2021
|
|
|
|
|
Contact: Can Guo <cang@codeaurora.org>
|
|
|
|
|
Description: This file shows the minimum latency (in micro seconds) of
|
|
|
|
|
read requests after monitor gets started.
|
|
|
|
|
|
|
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/monitor/read_req_latency_avg
|
|
|
|
|
Date: January 2021
|
|
|
|
|
Contact: Can Guo <cang@codeaurora.org>
|
|
|
|
|
Description: This file shows the average latency (in micro seconds) of
|
|
|
|
|
read requests after monitor gets started.
|
|
|
|
|
|
|
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/monitor/read_req_latency_sum
|
|
|
|
|
Date: January 2021
|
|
|
|
|
Contact: Can Guo <cang@codeaurora.org>
|
|
|
|
|
Description: This file shows the total latency (in micro seconds) of
|
|
|
|
|
read requests sent after monitor gets started.
|
|
|
|
|
|
|
|
|
|
The file is read only.
|
|
|
|
|
|
|
|
|
|
What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_total_sectors
|
|
|
|
|
Date: January 2021
|
|
|
|
|
Contact: Can Guo <cang@codeaurora.org>
|
|
|
|
|
Description: This file shows how many sectors (in 512 Bytes) have been sent
|
|
|
|
|
from host to device after monitor gets started.
|
|
|
|
|
|
|
|
|
|
The file is read only.
|
|
|
|
|
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|
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What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_total_busy
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Date: January 2021
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Contact: Can Guo <cang@codeaurora.org>
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Description: This file shows how long (in micro seconds) has been spent
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sending data from host to device after monitor gets started.
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_nr_requests
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Date: January 2021
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Contact: Can Guo <cang@codeaurora.org>
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Description: This file shows how many write requests have been sent after
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monitor gets started.
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_req_latency_max
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Date: January 2021
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Contact: Can Guo <cang@codeaurora.org>
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Description: This file shows the maximum latency (in micro seconds) of write
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requests after monitor gets started.
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_req_latency_min
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Date: January 2021
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Contact: Can Guo <cang@codeaurora.org>
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Description: This file shows the minimum latency (in micro seconds) of write
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requests after monitor gets started.
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_req_latency_avg
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Date: January 2021
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Contact: Can Guo <cang@codeaurora.org>
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Description: This file shows the average latency (in micro seconds) of write
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requests after monitor gets started.
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_req_latency_sum
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Date: January 2021
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Contact: Can Guo <cang@codeaurora.org>
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Description: This file shows the total latency (in micro seconds) of write
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requests after monitor gets started.
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The file is read only.
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2020-06-10 01:17:46 +08:00
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What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/wb_presv_us_en
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Date: June 2020
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Contact: Asutosh Das <asutoshd@codeaurora.org>
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Description: This entry shows if preserve user-space was configured
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2020-10-30 15:40:50 +08:00
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2020-06-10 01:17:46 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/wb_shared_alloc_units
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Date: June 2020
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Contact: Asutosh Das <asutoshd@codeaurora.org>
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Description: This entry shows the shared allocated units of WB buffer
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2020-10-30 15:40:50 +08:00
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2020-06-10 01:17:46 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/wb_type
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Date: June 2020
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Contact: Asutosh Das <asutoshd@codeaurora.org>
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Description: This entry shows the configured WB type.
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0x1 for shared buffer mode. 0x0 for dedicated buffer mode.
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2020-10-30 15:40:50 +08:00
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2020-06-10 01:17:46 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/wb_buff_cap_adj
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Date: June 2020
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Contact: Asutosh Das <asutoshd@codeaurora.org>
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Description: This entry shows the total user-space decrease in shared
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buffer mode.
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The value of this parameter is 3 for TLC NAND when SLC mode
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is used as WriteBooster Buffer. 2 for MLC NAND.
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2020-10-30 15:40:50 +08:00
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2020-06-10 01:17:46 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/wb_max_alloc_units
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Date: June 2020
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Contact: Asutosh Das <asutoshd@codeaurora.org>
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Description: This entry shows the Maximum total WriteBooster Buffer size
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which is supported by the entire device.
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2020-10-30 15:40:50 +08:00
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2020-06-10 01:17:46 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/wb_max_wb_luns
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Date: June 2020
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Contact: Asutosh Das <asutoshd@codeaurora.org>
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Description: This entry shows the maximum number of luns that can support
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WriteBooster.
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2020-10-30 15:40:50 +08:00
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2020-06-10 01:17:46 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/wb_sup_red_type
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Date: June 2020
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Contact: Asutosh Das <asutoshd@codeaurora.org>
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Description: The supportability of user space reduction mode
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and preserve user space mode.
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00h: WriteBooster Buffer can be configured only in
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user space reduction type.
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01h: WriteBooster Buffer can be configured only in
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preserve user space type.
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02h: Device can be configured in either user space
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reduction type or preserve user space type.
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2020-10-30 15:40:50 +08:00
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2020-06-10 01:17:46 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/wb_sup_wb_type
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Date: June 2020
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Contact: Asutosh Das <asutoshd@codeaurora.org>
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Description: The supportability of WriteBooster Buffer type.
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2020-10-30 15:40:50 +08:00
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=== ==========================================================
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00h LU based WriteBooster Buffer configuration
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01h Single shared WriteBooster Buffer configuration
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02h Supporting both LU based WriteBooster.
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Buffer and Single shared WriteBooster Buffer configuration
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=== ==========================================================
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2020-06-10 01:17:46 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/flags/wb_enable
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Date: June 2020
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Contact: Asutosh Das <asutoshd@codeaurora.org>
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Description: This entry shows the status of WriteBooster.
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2020-10-30 15:40:50 +08:00
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== ============================
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0 WriteBooster is not enabled.
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1 WriteBooster is enabled
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== ============================
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2020-06-10 01:17:46 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/flags/wb_flush_en
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Date: June 2020
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Contact: Asutosh Das <asutoshd@codeaurora.org>
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Description: This entry shows if flush is enabled.
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2020-10-30 15:40:50 +08:00
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== =================================
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0 Flush operation is not performed.
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1 Flush operation is performed.
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== =================================
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2020-06-10 01:17:46 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/flags/wb_flush_during_h8
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Date: June 2020
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Contact: Asutosh Das <asutoshd@codeaurora.org>
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Description: Flush WriteBooster Buffer during hibernate state.
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2020-10-30 15:40:50 +08:00
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== =================================================
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0 Device is not allowed to flush the
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WriteBooster Buffer during link hibernate state.
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1 Device is allowed to flush the
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WriteBooster Buffer during link hibernate state.
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== =================================================
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2020-06-10 01:17:46 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/attributes/wb_avail_buf
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Date: June 2020
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Contact: Asutosh Das <asutoshd@codeaurora.org>
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Description: This entry shows the amount of unused WriteBooster buffer
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available.
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2020-10-30 15:40:50 +08:00
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2020-06-10 01:17:46 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/attributes/wb_cur_buf
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Date: June 2020
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Contact: Asutosh Das <asutoshd@codeaurora.org>
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Description: This entry shows the amount of unused current buffer.
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2020-10-30 15:40:50 +08:00
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2020-06-10 01:17:46 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/attributes/wb_flush_status
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Date: June 2020
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Contact: Asutosh Das <asutoshd@codeaurora.org>
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Description: This entry shows the flush operation status.
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2020-10-30 15:40:50 +08:00
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=== ======================================
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00h idle
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01h Flush operation in progress
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02h Flush operation stopped prematurely.
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03h Flush operation completed successfully
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04h Flush operation general failure
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=== ======================================
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2020-06-10 01:17:46 +08:00
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/attributes/wb_life_time_est
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Date: June 2020
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Contact: Asutosh Das <asutoshd@codeaurora.org>
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Description: This entry shows an indication of the WriteBooster Buffer
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lifetime based on the amount of performed program/erase cycles
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2020-10-30 15:40:50 +08:00
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=== =============================================
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01h 0% - 10% WriteBooster Buffer life time used
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2020-06-10 01:17:46 +08:00
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...
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2020-10-30 15:40:50 +08:00
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0Ah 90% - 100% WriteBooster Buffer life time used
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=== =============================================
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2020-06-10 01:17:46 +08:00
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The file is read only.
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What: /sys/class/scsi_device/*/device/unit_descriptor/wb_buf_alloc_units
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Date: June 2020
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Contact: Asutosh Das <asutoshd@codeaurora.org>
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Description: This entry shows the configured size of WriteBooster buffer.
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0400h corresponds to 4GB.
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2020-10-30 15:40:50 +08:00
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2020-06-10 01:17:46 +08:00
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The file is read only.
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2021-01-20 00:38:43 +08:00
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What: /sys/bus/platform/drivers/ufshcd/*/wb_on
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Date: January 2021
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|
Contact: Bean Huo <beanhuo@micron.com>
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Description: This node is used to set or display whether UFS WriteBooster is
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enabled. Echo 0 to this file to disable UFS WriteBooster or 1 to
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enable it. The WriteBooster is enabled after power-on/reset,
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however, it will be disabled/enable while CLK scaling down/up
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(if the platform supports UFSHCD_CAP_CLK_SCALING). For a
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platform that doesn't support UFSHCD_CAP_CLK_SCALING, we can
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disable/enable WriteBooster through this sysfs node.
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