Hi Mani,
On 11/1/2023 1:12 PM, Manivannan Sadhasivam wrote:
On Tue, Oct 31, 2023 at 09:00:34PM -0700, 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 bunch of power saving
features and various combinations for backward compatibility.
Signed-off-by: Can Guo <quic_cang@xxxxxxxxxxx>
Just a nitpick below. With that addressed,
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
---
v2 -> v3:
1. For mode/gear/rate/dev_pm/link_status, print texts instead of numbers
2. Removed number<->text explanations for mode/rate/gear/dev_pm/link_status in Documentation/ABI/testing/sysfs-driver-ufs
v1 -> v2:
1. Incorporated comments from Bart, Nitin and Mani.
2. Added explanations for lane/mode/rate/gear/dev_pm/link_status in Documentation/ABI/testing/sysfs-driver-ufs
---
Documentation/ABI/testing/sysfs-driver-ufs | 49 ++++++++++++
drivers/ufs/core/ufs-sysfs.c | 120 +++++++++++++++++++++++++++++
include/ufs/unipro.h | 4 +-
3 files changed, 171 insertions(+), 2 deletions(-)
diff --git a/Documentation/ABI/testing/sysfs-driver-ufs b/Documentation/ABI/testing/sysfs-driver-ufs
index 0c7efaf..b73067b 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@xxxxxxxxxxx>
+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@xxxxxxxxxxx>
+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@xxxxxxxxxxx>
+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@xxxxxxxxxxx>
+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@xxxxxxxxxxx>
+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@xxxxxxxxxxx>
+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
diff --git a/drivers/ufs/core/ufs-sysfs.c b/drivers/ufs/core/ufs-sysfs.c
index c959064..b8b5dd1 100644
--- a/drivers/ufs/core/ufs-sysfs.c
+++ b/drivers/ufs/core/ufs-sysfs.c
@@ -7,9 +7,56 @@
#include <asm/unaligned.h>
#include <ufs/ufs.h>
+#include <ufs/unipro.h>
#include "ufs-sysfs.h"
#include "ufshcd-priv.h"
+static const char *ufshcd_ufs_pa_pwr_mode_to_string(enum ufs_pa_pwr_mode mode)
I don't think it is necessary to have the ufshcd_ prefix.
Done
Thanks,
Can Guo.
