| Message ID | 576e53a1d0ef218536da976102b4cc207436ec1d.1679403696.git.quic_schowdhu@quicinc.com |
|---|---|
| State | New |
| Headers | show |
| Series | None | expand |
On 3/22/2023 9:59 PM, Krzysztof Kozlowski wrote: > On 22/03/2023 14:46, Souradeep Chowdhury wrote: >>>> + - const: qcom,mpm2-sleep-counter >>> >>> SoC specific compatible. >>> >> >> This is a generic Module Power Manager Sleep Counter which is present in >> all Qcom Socs, so SoC specific compatible is not given here. > > Not really a good reason and it is actually very difficult to verify > this. If I understand correctly any moment FW can change and this will > stop being valid, so no. Ack > >> >>>> + >>>> + reg: >>>> + items: >>>> + - description: MPM Sleep Counter Base >>> >>> just maxItems: 1 >>> >> >> Ack >>>> + >>>> + clock-frequency: >>>> + description: Frequency for the sleep counter >>> >>> Since this does not have clocks, what frequency you are setting here? >> >> Module Power Manager(MPM) Sleep Counter is a clock that starts ticking >> from Primary Boot Loader(PBL) Stage. This is usually a 32 Khz clock and >> the frequency for the same is stored here. > > You just said all devices have the same MPM, so I would argue that all > devices have the same clock. > > Anyway, this is a legacy property. Ack. Will drop clock frequency. > > Best regards, > Krzysztof >
diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,mpm-sleep-counter.yaml b/Documentation/devicetree/bindings/soc/qcom/qcom,mpm-sleep-counter.yaml new file mode 100644 index 0000000..f9f46b7 --- /dev/null +++ b/Documentation/devicetree/bindings/soc/qcom/qcom,mpm-sleep-counter.yaml @@ -0,0 +1,40 @@ +# SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/soc/qcom/qcom,mpm-sleep-counter.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: MPM Sleep Counter + +maintainers: + - Souradeep Chowdhury <quic_schowdhu@quicinc.com> + +description: | + MPM(Module Power Manager) has a sleep counter which is used to track + various stages of the boot process in Qualcomm. + +properties: + compatible: + items: + - const: qcom,mpm2-sleep-counter + + reg: + items: + - description: MPM Sleep Counter Base + + clock-frequency: + description: Frequency for the sleep counter + +required: + - compatible + - reg + +additionalProperties: false + +examples: + - | + mpm2-sleep-counter@c221000{ + compatible = "qcom,mpm2-sleep-counter"; + reg = <0xc221000 0x1000>; + clock-frequency = <32768>; + };
Add the device tree bindings for the module power manager sleep counter. Signed-off-by: Souradeep Chowdhury <quic_schowdhu@quicinc.com> --- .../bindings/soc/qcom/qcom,mpm-sleep-counter.yaml | 40 ++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 Documentation/devicetree/bindings/soc/qcom/qcom,mpm-sleep-counter.yaml