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scsi: ufs: sysfs: power descriptor

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This patch introduces a sysfs group entry for the UFS power descriptor
parameters. The group adds "power_descriptor" folder under the UFS driver
sysfs entry (/sys/bus/platform/drivers/ufshcd/*). The parameters are shown
as hexadecimal numbers. The full information about the parameters could be
found at UFS specifications 2.1.

Signed-off-by: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Stanislav Nijnikov
2018-02-15 14:14:06 +02:00
committed by Martin K. Petersen
parent c648c2d27f
commit c2e6e283c5
2 changed files with 127 additions and 0 deletions
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10
Documentation/ABI/testing/sysfs-driver-ufs
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@@ -441,3 +441,13 @@ Description: This file shows indication of the device life time
parameters. The full information about the descriptor
could be found at UFS specifications 2.1.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/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.
The file is read only.