Hi Bart,
On 9/18/2023 11:36 PM, Bart Van Assche wrote:
On 9/10/23 22:59, Can Guo wrote:
Having UFS power info available in sysfs makes it easier to tell the
state
of the link during runtime considering we have a bounch of power saving
features and various combinations for backward compatiblity.
bounch -> bunch
compatiblity -> compatibility
Additionally, please combine this patch with patch 5/6 into a single
patch.
Sure
-What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_req_latency_sum
-What: /sys/bus/platform/devices/*.ufs/monitor/write_req_latency_sum
-Date: January 2021
Has the above information perhaps been removed by accident?
Yes, my bad, good catch.
+What: /sys/bus/platform/drivers/ufshcd/*/power_info/gear
+What: /sys/bus/platform/devices/*.ufs/power_info/gear
+Date: September 2023
Contact: Can Guo <quic_cang@xxxxxxxxxxx>
-Description: This file shows the total latency (in micro seconds)
of write
- requests after monitor gets started.
+Description: This file shows the gear of UFS link.
+
+ The file is read only.
Please explain what "gear" means and also what the unit is of the
numbers reported via this sysfs attribute.
Sure
+What: /sys/bus/platform/drivers/ufshcd/*/power_info/mode
+What: /sys/bus/platform/devices/*.ufs/power_info/mode
+Date: September 2023
+Contact: Can Guo <quic_cang@xxxxxxxxxxx>
+Description: This file shows the power mode of UFS link.
+
+ The file is read only.
Please document the meaning of the numbers reported via this sysfs
attribute.
Sure
+What: /sys/bus/platform/drivers/ufshcd/*/power_info/rate
+What: /sys/bus/platform/devices/*.ufs/power_info/rate
+Date: September 2023
+Contact: Can Guo <quic_cang@xxxxxxxxxxx>
+Description: This file shows the high speed rate of UFS link.
+
+ The file is read only.
Please document the unit of the numbers reported via this sysfs
attribute.
Sure
+What: /sys/bus/platform/drivers/ufshcd/*/power_info/dev_pm
+What: /sys/bus/platform/devices/*.ufs/power_info/dev_pm
+Date: September 2023
+Contact: Can Guo <quic_cang@xxxxxxxxxxx>
+Description: This file shows the UFS device power mode, i.e., the
power mode
+ set to UFS device via the Start Stop Unit command.
Please document the meaning of the numbers reported through this sysfs
attribute.
Sure
+What: /sys/bus/platform/drivers/ufshcd/*/power_info/link_state
+What: /sys/bus/platform/devices/*.ufs/power_info/link_state
+Date: September 2023
+Contact: Can Guo <quic_cang@xxxxxxxxxxx>
+Description: This file shows the the state of the UFS link.
Please document the meaning of the numbers reported through this sysfs
attribute.
Sure
Thanks,
Can Guo.
Thanks,
Bart.
