On 12.04.2023 16:22, Rob Herring wrote: > On Thu, Apr 06, 2023 at 04:49:17PM +0200, Konrad Dybcio wrote: >> The RPM MSG RAM contains per-RPM-master (e.g. APPS, ADSP etc.) sleep >> statistics. They let one assess which core is actively preventing the >> system from entering a true low-power mode. > > Just curious, is that a debug thing or something the OS uses? Debug, pretty much the only way of knowing how deep the sleep was other than shoving a multimiter under the chip and checking if the power rails went off.. :/ > >> >> Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx> >> --- >> .../bindings/soc/qcom/rpm-master-stats.yaml | 53 ++++++++++++++++++++++ > > qcom,rpm-master-stats.yaml Ack Konrad > >> 1 file changed, 53 insertions(+) >> >> diff --git a/Documentation/devicetree/bindings/soc/qcom/rpm-master-stats.yaml b/Documentation/devicetree/bindings/soc/qcom/rpm-master-stats.yaml >> new file mode 100644 >> index 000000000000..d2d6a2a39fef >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/soc/qcom/rpm-master-stats.yaml >> @@ -0,0 +1,53 @@ >> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) >> +%YAML 1.2 >> +--- >> +$id: http://devicetree.org/schemas/soc/qcom/rpm-master-stats.yaml# >> +$schema: http://devicetree.org/meta-schemas/core.yaml# >> + >> +title: Qualcomm Technologies, Inc. (QTI) RPM Master Stats >> + >> +maintainers: >> + - Konrad Dybcio <konrad.dybcio@xxxxxxxxxx> >> + >> +description: >> + Per-RPM-Master (e.g. APSS, ADSP, etc.) sleep statistics. >> + >> +properties: >> + compatible: >> + const: qcom,rpm-master-stats >> + >> + qcom,rpm-msg-ram: >> + $ref: /schemas/types.yaml#/definitions/phandle-array >> + description: Phandle to an RPM MSG RAM slice containing the master stats >> + minItems: 1 >> + maxItems: 5 >> + >> + qcom,master-names: >> + $ref: /schemas/types.yaml#/definitions/string-array >> + description: RPM Master name >> + minItems: 1 >> + maxItems: 5 >> + >> +required: >> + - compatible >> + - qcom,rpm-msg-ram >> + - qcom,master-names >> + >> +additionalProperties: false >> + >> +examples: >> + - | >> + stats { >> + compatible = "qcom,rpm-master-stats"; >> + qcom,rpm-msg-ram = <&apss_master_stats>, >> + <&mpss_master_stats>, >> + <&adsp_master_stats>, >> + <&cdsp_master_stats>, >> + <&tz_master_stats>; >> + qcom,master-names = "APSS", >> + "MPSS", >> + "ADSP", >> + "CDSP", >> + "TZ"; >> + }; >> +... >> >> -- >> 2.40.0 >>
