@@ -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 file 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 file.
+
+ The file 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 file 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 file.
+
+ The file 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 file shows and sets the number of milliseconds of idle time
+ before the UFS driver start to perform clock gating. This can
+ prevent the UFS from frequently performing clock gate/ungate.
+
+ The file is read/write.
Add UFS driver sysfs attributes clkscale_enable, clkgate_enable and clkgate_delay_ms to this doucment. Signed-off-by: Ziqi Chen <quic_ziqichen@quicinc.com> --- v1 -> v2: It is a new patch be added to this series since v2. v2 -> v3: 1. Typo fixed for commit message. 2. Improve the grammar of attributes' descriptions. --- Documentation/ABI/testing/sysfs-driver-ufs | 33 ++++++++++++++++++++++ 1 file changed, 33 insertions(+)