[PATCH 0/3] Add subsystem sleep stats support for Shikra

[Sneh Mankad]

SoC sleep stats are present in RPM message RAM and subsystem sleep
stats are present in SMEM for Shikra.

For earlier targets using RPM processor like msm8974, rpm_master_stat.c
was used for subsystem sleep stats since those stats were populated in
RPM MSGRAM.

Here is a brief summary of previous targets and their stats
configuration, along with the drivers used to display them.

+---------------|----------------------------|---------------------------+
| SoC           | subsystem sleep stats      | SoC sleep stats           |
|---------------|----------------------------|---------------------------|
| msm8974,      | RPM processor MSGRAM       | RPM processor MSGRAM      |
| msm8226       | (rpm_master_stat.c)        | (qcom_stats.c)            |
|---------------|----------------------------|---------------------------|
| sm6350,       | SMEM (DDR)                 | AOP processor MSGRAM      |
| sdm845, etc.  | (qcom_stats.c)             | (qcom_stats.c)            |
|---------------|----------------------------|---------------------------|
| Shikra        | SMEM (DDR)                 | RPM processor MSGRAM      |
|               | (qcom_stats.c)             | (qcom_stats.c)            |
+---------------|----------------------------|---------------------------+

qcom_stats.c supports both the configurations for shikra, reading
subsystem sleep stats from SMEM and reading SoC sleep stats from RPM
MSGRAM.

A generic "qcom,rpm-stats" compatible only reads SoC sleep stats like vmin
and vlow. Add shikra rpm compatible and config to read subsystem sleep
stats too along with SoC sleep stats.

Below is an example showing sleep stats for "apss" subsystem with this
change:

cat /sys/kernel/debug/qcom_stats/apss
Count: 2192
Last Entered At: 5498618336
Last Exited At: 5498708046
Accumulated Duration: 2046572620.

Signed-off-by: Sneh Mankad <sneh.mankad@xxxxxxxxxxxxxxxx>
---
Sneh Mankad (3):
      dt-bindings: soc: qcom: stats: Add compatible for Shikra
      soc: qcom: stats: Add stats compatible and config for Shikra
      arm64: dts: qcom: shikra: Add LPM stats support for subsystems

 Documentation/devicetree/bindings/soc/qcom/qcom-stats.yaml | 1 +
 arch/arm64/boot/dts/qcom/shikra.dtsi                       | 2 +-
 drivers/soc/qcom/qcom_stats.c                              | 9 +++++++++
 3 files changed, 11 insertions(+), 1 deletion(-)
---
base-commit: 4c9d9db1697a873f78d236b4ce304272206238ac
change-id: 20260624-shikra_stats-3f01f136fb4c

Best regards,
-- 
Sneh Mankad <sneh.mankad@xxxxxxxxxxxxxxxx>