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.
-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?
+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.
+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.
+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.
+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.
+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.
Thanks, Bart.
