| Message ID | 20210708120656.663851-7-thara.gopinath@linaro.org (mailing list archive) |
|---|---|
| State | Superseded, archived |
| Headers | show |
| Series | Introduce LMh driver for Qualcomm SoCs | expand |
On Thu 08 Jul 07:06 CDT 2021, Thara Gopinath wrote: > Add dt binding documentation to describe Qualcomm > Limits Management Hardware node. > > Signed-off-by: Thara Gopinath <thara.gopinath@linaro.org> > --- > .../devicetree/bindings/thermal/qcom-lmh.yaml | 100 ++++++++++++++++++ > 1 file changed, 100 insertions(+) > create mode 100644 Documentation/devicetree/bindings/thermal/qcom-lmh.yaml > > diff --git a/Documentation/devicetree/bindings/thermal/qcom-lmh.yaml b/Documentation/devicetree/bindings/thermal/qcom-lmh.yaml > new file mode 100644 > index 000000000000..7f62bd3d543d > --- /dev/null > +++ b/Documentation/devicetree/bindings/thermal/qcom-lmh.yaml > @@ -0,0 +1,100 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +# Copyright 2021 Linaro Ltd. > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/thermal/qcom-lmh.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Qualcomm Limits Management Hardware(LMh) > + > +maintainers: > + - Thara Gopinath <thara.gopinath@linaro.org> > + > +description: > + Limits Management Hardware(LMh) is a hardware infrastructure on some > + Qualcomm SoCs that can enforce temperature and current limits as > + programmed by software for certain IPs like CPU. > + > +properties: > + compatible: > + enum: > + - qcom,sdm845-lmh > + > + reg: > + items: > + - description: core registers > + > + interrupts: > + maxItems: 1 > + > + '#interrupt-cells': > + const: 1 > + > + interrupt-controller: true > + > + qcom,lmh-cpu-id: > + description: > + CPU id of the first cpu in the LMh cluster > + $ref: /schemas/types.yaml#/definitions/uint32 > + > + qcom,lmh-temperature-arm: > + description: > + An integer expressing temperature threshold in millicelsius at which > + the LMh thermal FSM is engaged. Do we know (by any public source) what "arm", "low" and "high" means beyond that they somehow pokes the state machine? > + $ref: /schemas/types.yaml#/definitions/int32 > + > + qcom,lmh-temperature-low: > + description: > + An integer expressing temperature threshold in millicelsius at which > + the LMh thermal FSM is engaged. > + $ref: /schemas/types.yaml#/definitions/int32 > + > + qcom,lmh-temperature-high: > + description: > + An integer expressing temperature threshold in millicelsius at which > + the LMh thermal FSM is engaged. > + $ref: /schemas/types.yaml#/definitions/int32 > + > +required: > + - compatible > + - reg > + - interrupts > + - #interrupt-cells > + - interrupt-controller > + - qcom,lmh-cpu-id > + - qcom,lmh-temperature-arm > + - qcom,lmh-temperature-low > + - qcom,lmh-temperature-high > + > +additionalProperties: false > + > +examples: > + - | > + #include <dt-bindings/interrupt-controller/arm-gic.h> > + #include <dt-bindings/clock/qcom,rpmh.h> > + #include <dt-bindings/interconnect/qcom,sdm845.h> I don't see why you need qcom,rpmh.h or the interconnect include in this example. > + > + lmh_cluster1: lmh@17d70800 { > + compatible = "qcom,sdm845-lmh"; > + reg = <0 0x17d70800 0 0x401>; #address- and #size-cells are 1 in the wrapper that validates the examples, so drop the two zeros. > + interrupts = <GIC_SPI 33 IRQ_TYPE_LEVEL_HIGH>; > + qcom,lmh-cpu-id = <0x4>; > + qcom,lmh-temperature-arm = <65000>; > + qcom,lmh-temperature-low = <94500>; > + qcom,lmh-temperature-high = <95000>; > + interrupt-controller; > + #interrupt-cells = <1>; > + }; > + - | This is a different example from the one above, if you intended that, don't you need the #include of arm-gic.h here as well? Regards, Bjorn > + lmh_cluster0: lmh@17d78800 { > + compatible = "qcom,sdm845-lmh"; > + reg = <0 0x17d78800 0 0x401>; > + interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>; > + qcom,lmh-cpu-id = <0x0>; > + qcom,lmh-temperature-arm = <65000>; > + qcom,lmh-temperature-low = <94500>; > + qcom,lmh-temperature-high = <95000>; > + interrupt-controller; > + #interrupt-cells = <1>; > + }; > + - | > -- > 2.25.1 >
On Thu, Jul 08, 2021 at 08:06:56AM -0400, Thara Gopinath wrote: > Add dt binding documentation to describe Qualcomm > Limits Management Hardware node. > > Signed-off-by: Thara Gopinath <thara.gopinath@linaro.org> > --- > .../devicetree/bindings/thermal/qcom-lmh.yaml | 100 ++++++++++++++++++ > 1 file changed, 100 insertions(+) > create mode 100644 Documentation/devicetree/bindings/thermal/qcom-lmh.yaml > > diff --git a/Documentation/devicetree/bindings/thermal/qcom-lmh.yaml b/Documentation/devicetree/bindings/thermal/qcom-lmh.yaml > new file mode 100644 > index 000000000000..7f62bd3d543d > --- /dev/null > +++ b/Documentation/devicetree/bindings/thermal/qcom-lmh.yaml > @@ -0,0 +1,100 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +# Copyright 2021 Linaro Ltd. > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/thermal/qcom-lmh.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Qualcomm Limits Management Hardware(LMh) > + > +maintainers: > + - Thara Gopinath <thara.gopinath@linaro.org> > + > +description: > + Limits Management Hardware(LMh) is a hardware infrastructure on some > + Qualcomm SoCs that can enforce temperature and current limits as > + programmed by software for certain IPs like CPU. > + > +properties: > + compatible: > + enum: > + - qcom,sdm845-lmh > + > + reg: > + items: > + - description: core registers > + > + interrupts: > + maxItems: 1 > + > + '#interrupt-cells': > + const: 1 > + > + interrupt-controller: true > + > + qcom,lmh-cpu-id: > + description: > + CPU id of the first cpu in the LMh cluster > + $ref: /schemas/types.yaml#/definitions/uint32 The way we reference other nodes in DT is phandles. 'cpus' is already somewhat established for this case. > + > + qcom,lmh-temperature-arm: > + description: > + An integer expressing temperature threshold in millicelsius at which Use unit suffix when you have units. > + the LMh thermal FSM is engaged. > + $ref: /schemas/types.yaml#/definitions/int32 > + > + qcom,lmh-temperature-low: > + description: > + An integer expressing temperature threshold in millicelsius at which > + the LMh thermal FSM is engaged. > + $ref: /schemas/types.yaml#/definitions/int32 > + > + qcom,lmh-temperature-high: > + description: > + An integer expressing temperature threshold in millicelsius at which > + the LMh thermal FSM is engaged. What's the difference in the 3 properties because the description is the same. > + $ref: /schemas/types.yaml#/definitions/int32 > + > +required: > + - compatible > + - reg > + - interrupts > + - #interrupt-cells > + - interrupt-controller > + - qcom,lmh-cpu-id > + - qcom,lmh-temperature-arm > + - qcom,lmh-temperature-low > + - qcom,lmh-temperature-high > + > +additionalProperties: false > + > +examples: > + - | > + #include <dt-bindings/interrupt-controller/arm-gic.h> > + #include <dt-bindings/clock/qcom,rpmh.h> > + #include <dt-bindings/interconnect/qcom,sdm845.h> > + > + lmh_cluster1: lmh@17d70800 { > + compatible = "qcom,sdm845-lmh"; > + reg = <0 0x17d70800 0 0x401>; > + interrupts = <GIC_SPI 33 IRQ_TYPE_LEVEL_HIGH>; > + qcom,lmh-cpu-id = <0x4>; > + qcom,lmh-temperature-arm = <65000>; > + qcom,lmh-temperature-low = <94500>; > + qcom,lmh-temperature-high = <95000>; > + interrupt-controller; What devices is this an interrupt controller for? > + #interrupt-cells = <1>; > + }; > + - | > + lmh_cluster0: lmh@17d78800 { > + compatible = "qcom,sdm845-lmh"; > + reg = <0 0x17d78800 0 0x401>; > + interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>; > + qcom,lmh-cpu-id = <0x0>; > + qcom,lmh-temperature-arm = <65000>; > + qcom,lmh-temperature-low = <94500>; > + qcom,lmh-temperature-high = <95000>; > + interrupt-controller; > + #interrupt-cells = <1>; > + }; > + - | > -- > 2.25.1 > >
On 7/10/21 12:21 AM, Bjorn Andersson wrote: > On Thu 08 Jul 07:06 CDT 2021, Thara Gopinath wrote: > >> Add dt binding documentation to describe Qualcomm >> Limits Management Hardware node. >> >> Signed-off-by: Thara Gopinath <thara.gopinath@linaro.org> >> --- >> .../devicetree/bindings/thermal/qcom-lmh.yaml | 100 ++++++++++++++++++ >> 1 file changed, 100 insertions(+) >> create mode 100644 Documentation/devicetree/bindings/thermal/qcom-lmh.yaml >> >> diff --git a/Documentation/devicetree/bindings/thermal/qcom-lmh.yaml b/Documentation/devicetree/bindings/thermal/qcom-lmh.yaml >> new file mode 100644 >> index 000000000000..7f62bd3d543d >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/thermal/qcom-lmh.yaml >> @@ -0,0 +1,100 @@ >> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) >> +# Copyright 2021 Linaro Ltd. >> +%YAML 1.2 >> +--- >> +$id: http://devicetree.org/schemas/thermal/qcom-lmh.yaml# >> +$schema: http://devicetree.org/meta-schemas/core.yaml# >> + >> +title: Qualcomm Limits Management Hardware(LMh) >> + >> +maintainers: >> + - Thara Gopinath <thara.gopinath@linaro.org> >> + >> +description: >> + Limits Management Hardware(LMh) is a hardware infrastructure on some >> + Qualcomm SoCs that can enforce temperature and current limits as >> + programmed by software for certain IPs like CPU. >> + >> +properties: >> + compatible: >> + enum: >> + - qcom,sdm845-lmh >> + >> + reg: >> + items: >> + - description: core registers >> + >> + interrupts: >> + maxItems: 1 >> + >> + '#interrupt-cells': >> + const: 1 >> + >> + interrupt-controller: true >> + >> + qcom,lmh-cpu-id: >> + description: >> + CPU id of the first cpu in the LMh cluster >> + $ref: /schemas/types.yaml#/definitions/uint32 >> + >> + qcom,lmh-temperature-arm: >> + description: >> + An integer expressing temperature threshold in millicelsius at which >> + the LMh thermal FSM is engaged. > > Do we know (by any public source) what "arm", "low" and "high" means > beyond that they somehow pokes the state machine? Not from public documentation. I know what these thresholds means, atleast to some extent. Though I will never claim to be an expert in this! There is an error in description of qcom,lmh-temperature-low and qcom,lmh-temperature-high below. I copied and forgot to change the description. I will fix it. > >> + $ref: /schemas/types.yaml#/definitions/int32 >> + >> + qcom,lmh-temperature-low: >> + description: >> + An integer expressing temperature threshold in millicelsius at which >> + the LMh thermal FSM is engaged. >> + $ref: /schemas/types.yaml#/definitions/int32 >> + >> + qcom,lmh-temperature-high: >> + description: >> + An integer expressing temperature threshold in millicelsius at which >> + the LMh thermal FSM is engaged. >> + $ref: /schemas/types.yaml#/definitions/int32 >> + >> +required: >> + - compatible >> + - reg >> + - interrupts >> + - #interrupt-cells >> + - interrupt-controller >> + - qcom,lmh-cpu-id >> + - qcom,lmh-temperature-arm >> + - qcom,lmh-temperature-low >> + - qcom,lmh-temperature-high >> + >> +additionalProperties: false >> + >> +examples: >> + - | >> + #include <dt-bindings/interrupt-controller/arm-gic.h> >> + #include <dt-bindings/clock/qcom,rpmh.h> >> + #include <dt-bindings/interconnect/qcom,sdm845.h> > > I don't see why you need qcom,rpmh.h or the interconnect include in this > example. I could have sworn make dt-bindings check failed. But maybe only The first include is needed. I will remove the other two. > >> + >> + lmh_cluster1: lmh@17d70800 { >> + compatible = "qcom,sdm845-lmh"; >> + reg = <0 0x17d70800 0 0x401>; > > #address- and #size-cells are 1 in the wrapper that validates the > examples, so drop the two zeros. Ok. > >> + interrupts = <GIC_SPI 33 IRQ_TYPE_LEVEL_HIGH>; >> + qcom,lmh-cpu-id = <0x4>; >> + qcom,lmh-temperature-arm = <65000>; >> + qcom,lmh-temperature-low = <94500>; >> + qcom,lmh-temperature-high = <95000>; >> + interrupt-controller; >> + #interrupt-cells = <1>; >> + }; >> + - | > > This is a different example from the one above, if you intended that, > don't you need the #include of arm-gic.h here as well? Again make dt-bindings check did not fail. It is a different example. So I am not sure of the norm here. Is one example good enough ? > > Regards, > Bjorn > >> + lmh_cluster0: lmh@17d78800 { >> + compatible = "qcom,sdm845-lmh"; >> + reg = <0 0x17d78800 0 0x401>; >> + interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>; >> + qcom,lmh-cpu-id = <0x0>; >> + qcom,lmh-temperature-arm = <65000>; >> + qcom,lmh-temperature-low = <94500>; >> + qcom,lmh-temperature-high = <95000>; >> + interrupt-controller; >> + #interrupt-cells = <1>; >> + }; >> + - | >> -- >> 2.25.1 >>
diff --git a/Documentation/devicetree/bindings/thermal/qcom-lmh.yaml b/Documentation/devicetree/bindings/thermal/qcom-lmh.yaml new file mode 100644 index 000000000000..7f62bd3d543d --- /dev/null +++ b/Documentation/devicetree/bindings/thermal/qcom-lmh.yaml @@ -0,0 +1,100 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +# Copyright 2021 Linaro Ltd. +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/thermal/qcom-lmh.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Qualcomm Limits Management Hardware(LMh) + +maintainers: + - Thara Gopinath <thara.gopinath@linaro.org> + +description: + Limits Management Hardware(LMh) is a hardware infrastructure on some + Qualcomm SoCs that can enforce temperature and current limits as + programmed by software for certain IPs like CPU. + +properties: + compatible: + enum: + - qcom,sdm845-lmh + + reg: + items: + - description: core registers + + interrupts: + maxItems: 1 + + '#interrupt-cells': + const: 1 + + interrupt-controller: true + + qcom,lmh-cpu-id: + description: + CPU id of the first cpu in the LMh cluster + $ref: /schemas/types.yaml#/definitions/uint32 + + qcom,lmh-temperature-arm: + description: + An integer expressing temperature threshold in millicelsius at which + the LMh thermal FSM is engaged. + $ref: /schemas/types.yaml#/definitions/int32 + + qcom,lmh-temperature-low: + description: + An integer expressing temperature threshold in millicelsius at which + the LMh thermal FSM is engaged. + $ref: /schemas/types.yaml#/definitions/int32 + + qcom,lmh-temperature-high: + description: + An integer expressing temperature threshold in millicelsius at which + the LMh thermal FSM is engaged. + $ref: /schemas/types.yaml#/definitions/int32 + +required: + - compatible + - reg + - interrupts + - #interrupt-cells + - interrupt-controller + - qcom,lmh-cpu-id + - qcom,lmh-temperature-arm + - qcom,lmh-temperature-low + - qcom,lmh-temperature-high + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + #include <dt-bindings/clock/qcom,rpmh.h> + #include <dt-bindings/interconnect/qcom,sdm845.h> + + lmh_cluster1: lmh@17d70800 { + compatible = "qcom,sdm845-lmh"; + reg = <0 0x17d70800 0 0x401>; + interrupts = <GIC_SPI 33 IRQ_TYPE_LEVEL_HIGH>; + qcom,lmh-cpu-id = <0x4>; + qcom,lmh-temperature-arm = <65000>; + qcom,lmh-temperature-low = <94500>; + qcom,lmh-temperature-high = <95000>; + interrupt-controller; + #interrupt-cells = <1>; + }; + - | + lmh_cluster0: lmh@17d78800 { + compatible = "qcom,sdm845-lmh"; + reg = <0 0x17d78800 0 0x401>; + interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>; + qcom,lmh-cpu-id = <0x0>; + qcom,lmh-temperature-arm = <65000>; + qcom,lmh-temperature-low = <94500>; + qcom,lmh-temperature-high = <95000>; + interrupt-controller; + #interrupt-cells = <1>; + }; + - |
Add dt binding documentation to describe Qualcomm Limits Management Hardware node. Signed-off-by: Thara Gopinath <thara.gopinath@linaro.org> --- .../devicetree/bindings/thermal/qcom-lmh.yaml | 100 ++++++++++++++++++ 1 file changed, 100 insertions(+) create mode 100644 Documentation/devicetree/bindings/thermal/qcom-lmh.yaml