[PATCH v3 0/2] Introduce RPM Master stats

[Konrad Dybcio <konrad.dybcio@linaro.org>]

v2 -> v3:
- rename rpm-master-stats.yaml to qcom,rpm-master-stats.yaml

v2: https://lore.kernel.org/r/20230405-topic-master_stats-v2-0-51c304ecb610@linaro.org

v1 -> v2:
- Drop the `-` in /properties/compatible to make our entry be of the
  correct type [1/2]
- Change %s to %d for printing out the iterator [2/2]

v1: https://lore.kernel.org/r/20230405-topic-master_stats-v1-0-1b1fa2739953@linaro.org

The RPM MSG ram includes per-subsystem low-power mode entry/exit/
residence/etc. statistics which are very useful for trying to debug
what I'd call "SoC insomnia", or IOW the plaftorm refusing to drop
the voltage rails to a minimum and gate the non-critical clocks.

This series adds a very short and simple driver to query that data
and expose it through debugfs.

The base used for writing this driver is:
https://github.com/sonyxperiadev/kernel/blob/aosp/LA.UM.9.14.r1/drivers/soc/qcom/rpm_master_stat.c

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
---
Konrad Dybcio (2):
      dt-bindings: soc: qcom: Add RPM Master stats
      soc: qcom: Introduce RPM master stats driver

 .../bindings/soc/qcom/qcom,rpm-master-stats.yaml   |  53 +++++++
 drivers/soc/qcom/Kconfig                           |  11 ++
 drivers/soc/qcom/Makefile                          |   1 +
 drivers/soc/qcom/rpm_master_stats.c                | 160 +++++++++++++++++++++
 4 files changed, 225 insertions(+)
---
base-commit: e3342532ecd39bbd9c2ab5b9001cec1589bc37e9
change-id: 20230405-topic-master_stats-ba201a9af93d

Best regards,
-- 
Konrad Dybcio <konrad.dybcio@linaro.org>