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FROMGIT: scsi: ABI: sysfs-driver-ufs: Add missing UFS sysfs attributes

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Add UFS driver sysfs attributes clkscale_enable, clkgate_enable and
clkgate_delay_ms to this document.

Signed-off-by: Ziqi Chen <quic_ziqichen@quicinc.com>
Link: https://lore.kernel.org/r/20250213080008.2984807-9-quic_ziqichen@quicinc.com
Reviewed-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Bug: 399777345
Change-Id: If7c577bd7ac2682e5baacc46131912c3d7c0ad98
(cherry picked from commit 6d7696b4d447028315038645f8a47f7539819be8
 https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git
6.15/scsi-staging)
Signed-off-by: Ziqi Chen <quic_ziqichen@quicinc.com>
This commit is contained in:
Ziqi Chen
2025-02-13 16:00:08 +08:00
committed by Carlos Llamas
parent a8d019ed25
commit 5df57bb333
1 changed files with 33 additions and 0 deletions
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Documentation/ABI/testing/sysfs-driver-ufs
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@@ -1559,3 +1559,36 @@ Description:
Symbol - HCMID. This file shows the UFSHCD manufacturer id.
The Manufacturer ID is defined by JEDEC in JEDEC-JEP106.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/clkscale_enable
What: /sys/bus/platform/devices/*.ufs/clkscale_enable
Date: January 2025
Contact: Ziqi Chen <quic_ziqichen@quicinc.com>
Description:
This attribute shows whether the UFS clock scaling is enabled or not.
And it can be used to enable/disable the clock scaling by writing
1 or 0 to this attribute.
The attribute is read/write.
What: /sys/bus/platform/drivers/ufshcd/*/clkgate_enable
What: /sys/bus/platform/devices/*.ufs/clkgate_enable
Date: January 2025
Contact: Ziqi Chen <quic_ziqichen@quicinc.com>
Description:
This attribute shows whether the UFS clock gating is enabled or not.
And it can be used to enable/disable the clock gating by writing
1 or 0 to this attribute.
The attribute is read/write.
What: /sys/bus/platform/drivers/ufshcd/*/clkgate_delay_ms
What: /sys/bus/platform/devices/*.ufs/clkgate_delay_ms
Date: January 2025
Contact: Ziqi Chen <quic_ziqichen@quicinc.com>
Description:
This attribute shows and sets the number of milliseconds of idle time
before the UFS driver starts to perform clock gating. This can
prevent the UFS from frequently performing clock gating/ungating.
The attribute is read/write.