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| author | Can Guo <quic_cang@quicinc.com> | 2023-11-01 18:58:36 -0700 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2023-11-15 10:23:55 -0500 |
| commit | 4f6dd2a4bf378bc4d169296739ea7d6972c0d858 (patch) | |
| tree | cf632f7658bd2000471d067dc975b8a5f4afb727 /Documentation/ABI | |
| parent | 2aee050cefdaaab9e65ce0894e2a784aac15b70c (diff) | |
| download | linux-4f6dd2a4bf378bc4d169296739ea7d6972c0d858.tar.gz | |
scsi: ufs: ufs-sysfs: Expose UFS power info
Having UFS power info available in sysfs makes it easier to tell the state
of the link during runtime considering we have a bunch of power saving
features and various combinations for backward compatibility.
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Bean Huo <beanhuo@micron.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Can Guo <quic_cang@quicinc.com>
Link: https://lore.kernel.org/r/1698890324-7374-1-git-send-email-quic_cang@quicinc.com
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-driver-ufs | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-driver-ufs b/Documentation/ABI/testing/sysfs-driver-ufs index 0c7efaf62de0c0..b73067bb5ea2ce 100644 --- a/Documentation/ABI/testing/sysfs-driver-ufs +++ b/Documentation/ABI/testing/sysfs-driver-ufs @@ -1223,6 +1223,55 @@ Description: This file shows the total latency (in micro seconds) of write The file is read only. +What: /sys/bus/platform/drivers/ufshcd/*/power_info/lane +What: /sys/bus/platform/devices/*.ufs/power_info/lane +Date: September 2023 +Contact: Can Guo <quic_cang@quicinc.com> +Description: This file shows how many lanes are enabled on the UFS link, + i.e., an output 2 means UFS link is operating with 2 lanes. + + The file is read only. + +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@quicinc.com> +Description: This file shows the PA power mode of UFS. + + The file is read only. + +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@quicinc.com> +Description: This file shows the speed rate of UFS link. + + The file is read only. + +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@quicinc.com> +Description: This file shows the gear of UFS link. + + The file is read only. + +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@quicinc.com> +Description: This file shows the UFS device power mode. + + The file is read only. + +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@quicinc.com> +Description: This file shows the state of UFS link. + + The file is read only. + What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/wb_presv_us_en What: /sys/bus/platform/devices/*.ufs/device_descriptor/wb_presv_us_en Date: June 2020 |