diff mbox series

dt-bindings: cpufreq: cpufreq-qcom-hw: Convert to YAML bindings

Message ID 20201006095047.30242-1-manivannan.sadhasivam@linaro.org (mailing list archive)
State New, archived
Delegated to: viresh kumar
Headers show
Series dt-bindings: cpufreq: cpufreq-qcom-hw: Convert to YAML bindings | expand

Commit Message

Manivannan Sadhasivam Oct. 6, 2020, 9:50 a.m. UTC 
Convert Qualcomm cpufreq devicetree binding to YAML.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
 .../bindings/cpufreq/cpufreq-qcom-hw.txt      | 172 --------------
 .../bindings/cpufreq/cpufreq-qcom-hw.yaml     | 212 ++++++++++++++++++
 2 files changed, 212 insertions(+), 172 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
 create mode 100644 Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml

Comments

Rob Herring (Arm) Oct. 7, 2020, 3:53 p.m. UTC | #1 
On Tue, Oct 06, 2020 at 03:20:47PM +0530, Manivannan Sadhasivam wrote:
> Convert Qualcomm cpufreq devicetree binding to YAML.
> 
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> ---
>  .../bindings/cpufreq/cpufreq-qcom-hw.txt      | 172 --------------
>  .../bindings/cpufreq/cpufreq-qcom-hw.yaml     | 212 ++++++++++++++++++
>  2 files changed, 212 insertions(+), 172 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
>  create mode 100644 Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml

> diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml
> new file mode 100644
> index 000000000000..a11c69a29b5d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml
> @@ -0,0 +1,212 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/cpufreq/cpufreq-qcom-hw.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Qualcomm Technologies, Inc. CPUFREQ
> +
> +maintainers:
> +  - Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> +
> +description: |
> +
> +  CPUFREQ HW is a hardware engine used by some Qualcomm Technologies, Inc. (QTI)
> +  SoCs to manage frequency in hardware. It is capable of controlling frequency
> +  for multiple clusters.
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - description: v1 of CPUFREQ HW
> +        items:
> +          - const: qcom,cpufreq-hw
> +
> +      - description: v2 of CPUFREQ HW (EPSS)
> +        items:
> +          - enum:
> +              - qcom,sm8250-cpufreq-epss
> +          - const: qcom,cpufreq-epss
> +
> +  reg:
> +    minItems: 2
> +    maxItems: 3
> +    items:
> +      - description: Frequency domain 0 register region
> +      - description: Frequency domain 1 register region
> +      - description: Frequency domain 2 register region
> +
> +  reg-names:
> +    minItems: 2
> +    maxItems: 3
> +    items:
> +      - const: freq-domain0
> +      - const: freq-domain1
> +      - const: freq-domain2
> +
> +  clocks:
> +    items:
> +      - description: XO Clock
> +      - description: GPLL0 Clock
> +
> +  clock-names:
> +    items:
> +      - const: xo
> +      - const: alternate
> +
> +  '#freq-domain-cells':
> +    const: 1
> +
> +  qcom,freq-domain:
> +    $ref: /schemas/types.yaml#/definitions/phandle-array
> +    maxItems: 1
> +    description:
> +      Devices supporting freq-domain must set their "qcom,freq-domain"
> +      property with phandle to a cpufreq_hw followed by the Domain ID(0/1)
> +      in the CPU DT node.

This doesn't belong here as it goes in cpu nodes. You're going to need 
to define a QCom cpu schema that defines this.

> +
> +required:
> +  - compatible
> +  - reg
> +  - reg-names
> +  - clocks
> +  - clock-names
> +  - '#freq-domain-cells'
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/qcom,gcc-sdm845.h>
> +    #include <dt-bindings/clock/qcom,rpmh.h>
> +
> +    // Example 1: Dual-cluster, Quad-core per cluster. CPUs within a cluster
> +    // switch DCVS state together.
> +    cpus {
> +      #address-cells = <2>;
> +      #size-cells = <0>;
> +
> +      CPU0: cpu@0 {
> +        device_type = "cpu";
> +        compatible = "qcom,kryo385";
> +        reg = <0x0 0x0>;
> +        enable-method = "psci";
> +        next-level-cache = <&L2_0>;
> +        qcom,freq-domain = <&cpufreq_hw 0>;
> +        L2_0: l2-cache {
> +          compatible = "cache";
> +          next-level-cache = <&L3_0>;
> +          L3_0: l3-cache {
> +            compatible = "cache";
> +          };
> +        };
> +      };
> +
> +      CPU1: cpu@100 {
> +        device_type = "cpu";
> +        compatible = "qcom,kryo385";
> +        reg = <0x0 0x100>;
> +        enable-method = "psci";
> +        next-level-cache = <&L2_100>;
> +        qcom,freq-domain = <&cpufreq_hw 0>;
> +        L2_100: l2-cache {
> +          compatible = "cache";
> +          next-level-cache = <&L3_0>;
> +        };
> +      };
> +
> +      CPU2: cpu@200 {
> +        device_type = "cpu";
> +        compatible = "qcom,kryo385";
> +        reg = <0x0 0x200>;
> +        enable-method = "psci";
> +        next-level-cache = <&L2_200>;
> +        qcom,freq-domain = <&cpufreq_hw 0>;
> +        L2_200: l2-cache {
> +          compatible = "cache";
> +          next-level-cache = <&L3_0>;
> +        };
> +      };
> +
> +      CPU3: cpu@300 {
> +        device_type = "cpu";
> +        compatible = "qcom,kryo385";
> +        reg = <0x0 0x300>;
> +        enable-method = "psci";
> +        next-level-cache = <&L2_300>;
> +        qcom,freq-domain = <&cpufreq_hw 0>;
> +        L2_300: l2-cache {
> +          compatible = "cache";
> +          next-level-cache = <&L3_0>;
> +        };
> +      };
> +
> +      CPU4: cpu@400 {
> +        device_type = "cpu";
> +        compatible = "qcom,kryo385";
> +        reg = <0x0 0x400>;
> +        enable-method = "psci";
> +        next-level-cache = <&L2_400>;
> +        qcom,freq-domain = <&cpufreq_hw 1>;
> +        L2_400: l2-cache {
> +          compatible = "cache";
> +          next-level-cache = <&L3_0>;
> +        };
> +      };
> +
> +      CPU5: cpu@500 {
> +        device_type = "cpu";
> +        compatible = "qcom,kryo385";
> +        reg = <0x0 0x500>;
> +        enable-method = "psci";
> +        next-level-cache = <&L2_500>;
> +        qcom,freq-domain = <&cpufreq_hw 1>;
> +        L2_500: l2-cache {
> +          compatible = "cache";
> +          next-level-cache = <&L3_0>;
> +        };
> +      };
> +
> +      CPU6: cpu@600 {
> +        device_type = "cpu";
> +        compatible = "qcom,kryo385";
> +        reg = <0x0 0x600>;
> +        enable-method = "psci";
> +        next-level-cache = <&L2_600>;
> +        qcom,freq-domain = <&cpufreq_hw 1>;
> +        L2_600: l2-cache {
> +          compatible = "cache";
> +          next-level-cache = <&L3_0>;
> +        };
> +      };
> +
> +      CPU7: cpu@700 {
> +        device_type = "cpu";
> +        compatible = "qcom,kryo385";
> +        reg = <0x0 0x700>;
> +        enable-method = "psci";
> +        next-level-cache = <&L2_700>;
> +        qcom,freq-domain = <&cpufreq_hw 1>;
> +        L2_700: l2-cache {
> +          compatible = "cache";
> +          next-level-cache = <&L3_0>;
> +        };
> +      };
> +    };
> +
> +    soc {
> +      #address-cells = <1>;
> +      #size-cells = <1>;
> +
> +      cpufreq@17d43000 {
> +        compatible = "qcom,cpufreq-hw";
> +        reg = <0x17d43000 0x1400>, <0x17d45800 0x1400>;
> +        reg-names = "freq-domain0", "freq-domain1";
> +
> +        clocks = <&rpmhcc RPMH_CXO_CLK>, <&gcc GPLL0>;
> +        clock-names = "xo", "alternate";
> +
> +        #freq-domain-cells = <1>;
> +      };
> +    };
> +...
> -- 
> 2.17.1
>
Manivannan Sadhasivam Oct. 8, 2020, 2:11 p.m. UTC | #2 
On Wed, Oct 07, 2020 at 10:53:52AM -0500, Rob Herring wrote:
> On Tue, Oct 06, 2020 at 03:20:47PM +0530, Manivannan Sadhasivam wrote:
> > Convert Qualcomm cpufreq devicetree binding to YAML.
> > 
> > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> > ---
> >  .../bindings/cpufreq/cpufreq-qcom-hw.txt      | 172 --------------
> >  .../bindings/cpufreq/cpufreq-qcom-hw.yaml     | 212 ++++++++++++++++++
> >  2 files changed, 212 insertions(+), 172 deletions(-)
> >  delete mode 100644 Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
> >  create mode 100644 Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml
> 
> > diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml
> > new file mode 100644
> > index 000000000000..a11c69a29b5d
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml
> > @@ -0,0 +1,212 @@

[...]

> > +
> > +  '#freq-domain-cells':
> > +    const: 1
> > +
> > +  qcom,freq-domain:
> > +    $ref: /schemas/types.yaml#/definitions/phandle-array
> > +    maxItems: 1
> > +    description:
> > +      Devices supporting freq-domain must set their "qcom,freq-domain"
> > +      property with phandle to a cpufreq_hw followed by the Domain ID(0/1)
> > +      in the CPU DT node.
> 
> This doesn't belong here as it goes in cpu nodes. You're going to need 
> to define a QCom cpu schema that defines this.
> 

Okay. It was there in the original binding so I just kept it. Will remove it
in next iteration.

Thanks,
Mani

> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - reg-names
> > +  - clocks
> > +  - clock-names
> > +  - '#freq-domain-cells'
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/clock/qcom,gcc-sdm845.h>
> > +    #include <dt-bindings/clock/qcom,rpmh.h>
> > +
> > +    // Example 1: Dual-cluster, Quad-core per cluster. CPUs within a cluster
> > +    // switch DCVS state together.
> > +    cpus {
> > +      #address-cells = <2>;
> > +      #size-cells = <0>;
> > +
> > +      CPU0: cpu@0 {
> > +        device_type = "cpu";
> > +        compatible = "qcom,kryo385";
> > +        reg = <0x0 0x0>;
> > +        enable-method = "psci";
> > +        next-level-cache = <&L2_0>;
> > +        qcom,freq-domain = <&cpufreq_hw 0>;
> > +        L2_0: l2-cache {
> > +          compatible = "cache";
> > +          next-level-cache = <&L3_0>;
> > +          L3_0: l3-cache {
> > +            compatible = "cache";
> > +          };
> > +        };
> > +      };
> > +
> > +      CPU1: cpu@100 {
> > +        device_type = "cpu";
> > +        compatible = "qcom,kryo385";
> > +        reg = <0x0 0x100>;
> > +        enable-method = "psci";
> > +        next-level-cache = <&L2_100>;
> > +        qcom,freq-domain = <&cpufreq_hw 0>;
> > +        L2_100: l2-cache {
> > +          compatible = "cache";
> > +          next-level-cache = <&L3_0>;
> > +        };
> > +      };
> > +
> > +      CPU2: cpu@200 {
> > +        device_type = "cpu";
> > +        compatible = "qcom,kryo385";
> > +        reg = <0x0 0x200>;
> > +        enable-method = "psci";
> > +        next-level-cache = <&L2_200>;
> > +        qcom,freq-domain = <&cpufreq_hw 0>;
> > +        L2_200: l2-cache {
> > +          compatible = "cache";
> > +          next-level-cache = <&L3_0>;
> > +        };
> > +      };
> > +
> > +      CPU3: cpu@300 {
> > +        device_type = "cpu";
> > +        compatible = "qcom,kryo385";
> > +        reg = <0x0 0x300>;
> > +        enable-method = "psci";
> > +        next-level-cache = <&L2_300>;
> > +        qcom,freq-domain = <&cpufreq_hw 0>;
> > +        L2_300: l2-cache {
> > +          compatible = "cache";
> > +          next-level-cache = <&L3_0>;
> > +        };
> > +      };
> > +
> > +      CPU4: cpu@400 {
> > +        device_type = "cpu";
> > +        compatible = "qcom,kryo385";
> > +        reg = <0x0 0x400>;
> > +        enable-method = "psci";
> > +        next-level-cache = <&L2_400>;
> > +        qcom,freq-domain = <&cpufreq_hw 1>;
> > +        L2_400: l2-cache {
> > +          compatible = "cache";
> > +          next-level-cache = <&L3_0>;
> > +        };
> > +      };
> > +
> > +      CPU5: cpu@500 {
> > +        device_type = "cpu";
> > +        compatible = "qcom,kryo385";
> > +        reg = <0x0 0x500>;
> > +        enable-method = "psci";
> > +        next-level-cache = <&L2_500>;
> > +        qcom,freq-domain = <&cpufreq_hw 1>;
> > +        L2_500: l2-cache {
> > +          compatible = "cache";
> > +          next-level-cache = <&L3_0>;
> > +        };
> > +      };
> > +
> > +      CPU6: cpu@600 {
> > +        device_type = "cpu";
> > +        compatible = "qcom,kryo385";
> > +        reg = <0x0 0x600>;
> > +        enable-method = "psci";
> > +        next-level-cache = <&L2_600>;
> > +        qcom,freq-domain = <&cpufreq_hw 1>;
> > +        L2_600: l2-cache {
> > +          compatible = "cache";
> > +          next-level-cache = <&L3_0>;
> > +        };
> > +      };
> > +
> > +      CPU7: cpu@700 {
> > +        device_type = "cpu";
> > +        compatible = "qcom,kryo385";
> > +        reg = <0x0 0x700>;
> > +        enable-method = "psci";
> > +        next-level-cache = <&L2_700>;
> > +        qcom,freq-domain = <&cpufreq_hw 1>;
> > +        L2_700: l2-cache {
> > +          compatible = "cache";
> > +          next-level-cache = <&L3_0>;
> > +        };
> > +      };
> > +    };
> > +
> > +    soc {
> > +      #address-cells = <1>;
> > +      #size-cells = <1>;
> > +
> > +      cpufreq@17d43000 {
> > +        compatible = "qcom,cpufreq-hw";
> > +        reg = <0x17d43000 0x1400>, <0x17d45800 0x1400>;
> > +        reg-names = "freq-domain0", "freq-domain1";
> > +
> > +        clocks = <&rpmhcc RPMH_CXO_CLK>, <&gcc GPLL0>;
> > +        clock-names = "xo", "alternate";
> > +
> > +        #freq-domain-cells = <1>;
> > +      };
> > +    };
> > +...
> > -- 
> > 2.17.1
> >
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
deleted file mode 100644
index 9299028ee712..000000000000
--- a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
+++ /dev/null
@@ -1,172 +0,0 @@ 
-Qualcomm Technologies, Inc. CPUFREQ Bindings
-
-CPUFREQ HW is a hardware engine used by some Qualcomm Technologies, Inc. (QTI)
-SoCs to manage frequency in hardware. It is capable of controlling frequency
-for multiple clusters.
-
-Properties:
-- compatible
-	Usage:		required
-	Value type:	<string>
-	Definition:	must be "qcom,cpufreq-hw" or "qcom,cpufreq-epss".
-
-- clocks
-	Usage:		required
-	Value type:	<phandle> From common clock binding.
-	Definition:	clock handle for XO clock and GPLL0 clock.
-
-- clock-names
-	Usage:		required
-	Value type:	<string> From common clock binding.
-	Definition:	must be "xo", "alternate".
-
-- reg
-	Usage:		required
-	Value type:	<prop-encoded-array>
-	Definition:	Addresses and sizes for the memory of the HW bases in
-			each frequency domain.
-- reg-names
-	Usage:		Optional
-	Value type:	<string>
-	Definition:	Frequency domain name i.e.
-			"freq-domain0", "freq-domain1".
-
-- #freq-domain-cells:
-	Usage:		required.
-	Definition:	Number of cells in a freqency domain specifier.
-
-* Property qcom,freq-domain
-Devices supporting freq-domain must set their "qcom,freq-domain" property with
-phandle to a cpufreq_hw followed by the Domain ID(0/1) in the CPU DT node.
-
-
-Example:
-
-Example 1: Dual-cluster, Quad-core per cluster. CPUs within a cluster switch
-DCVS state together.
-
-/ {
-	cpus {
-		#address-cells = <2>;
-		#size-cells = <0>;
-
-		CPU0: cpu@0 {
-			device_type = "cpu";
-			compatible = "qcom,kryo385";
-			reg = <0x0 0x0>;
-			enable-method = "psci";
-			next-level-cache = <&L2_0>;
-			qcom,freq-domain = <&cpufreq_hw 0>;
-			L2_0: l2-cache {
-				compatible = "cache";
-				next-level-cache = <&L3_0>;
-				L3_0: l3-cache {
-				      compatible = "cache";
-				};
-			};
-		};
-
-		CPU1: cpu@100 {
-			device_type = "cpu";
-			compatible = "qcom,kryo385";
-			reg = <0x0 0x100>;
-			enable-method = "psci";
-			next-level-cache = <&L2_100>;
-			qcom,freq-domain = <&cpufreq_hw 0>;
-			L2_100: l2-cache {
-				compatible = "cache";
-				next-level-cache = <&L3_0>;
-			};
-		};
-
-		CPU2: cpu@200 {
-			device_type = "cpu";
-			compatible = "qcom,kryo385";
-			reg = <0x0 0x200>;
-			enable-method = "psci";
-			next-level-cache = <&L2_200>;
-			qcom,freq-domain = <&cpufreq_hw 0>;
-			L2_200: l2-cache {
-				compatible = "cache";
-				next-level-cache = <&L3_0>;
-			};
-		};
-
-		CPU3: cpu@300 {
-			device_type = "cpu";
-			compatible = "qcom,kryo385";
-			reg = <0x0 0x300>;
-			enable-method = "psci";
-			next-level-cache = <&L2_300>;
-			qcom,freq-domain = <&cpufreq_hw 0>;
-			L2_300: l2-cache {
-				compatible = "cache";
-				next-level-cache = <&L3_0>;
-			};
-		};
-
-		CPU4: cpu@400 {
-			device_type = "cpu";
-			compatible = "qcom,kryo385";
-			reg = <0x0 0x400>;
-			enable-method = "psci";
-			next-level-cache = <&L2_400>;
-			qcom,freq-domain = <&cpufreq_hw 1>;
-			L2_400: l2-cache {
-				compatible = "cache";
-				next-level-cache = <&L3_0>;
-			};
-		};
-
-		CPU5: cpu@500 {
-			device_type = "cpu";
-			compatible = "qcom,kryo385";
-			reg = <0x0 0x500>;
-			enable-method = "psci";
-			next-level-cache = <&L2_500>;
-			qcom,freq-domain = <&cpufreq_hw 1>;
-			L2_500: l2-cache {
-				compatible = "cache";
-				next-level-cache = <&L3_0>;
-			};
-		};
-
-		CPU6: cpu@600 {
-			device_type = "cpu";
-			compatible = "qcom,kryo385";
-			reg = <0x0 0x600>;
-			enable-method = "psci";
-			next-level-cache = <&L2_600>;
-			qcom,freq-domain = <&cpufreq_hw 1>;
-			L2_600: l2-cache {
-				compatible = "cache";
-				next-level-cache = <&L3_0>;
-			};
-		};
-
-		CPU7: cpu@700 {
-			device_type = "cpu";
-			compatible = "qcom,kryo385";
-			reg = <0x0 0x700>;
-			enable-method = "psci";
-			next-level-cache = <&L2_700>;
-			qcom,freq-domain = <&cpufreq_hw 1>;
-			L2_700: l2-cache {
-				compatible = "cache";
-				next-level-cache = <&L3_0>;
-			};
-		};
-	};
-
- soc {
-	cpufreq_hw: cpufreq@17d43000 {
-		compatible = "qcom,cpufreq-hw";
-		reg = <0x17d43000 0x1400>, <0x17d45800 0x1400>;
-		reg-names = "freq-domain0", "freq-domain1";
-
-		clocks = <&rpmhcc RPMH_CXO_CLK>, <&gcc GPLL0>;
-		clock-names = "xo", "alternate";
-
-		#freq-domain-cells = <1>;
-	};
-}
diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml
new file mode 100644
index 000000000000..a11c69a29b5d
--- /dev/null
+++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml
@@ -0,0 +1,212 @@ 
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/cpufreq/cpufreq-qcom-hw.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Technologies, Inc. CPUFREQ
+
+maintainers:
+  - Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
+
+description: |
+
+  CPUFREQ HW is a hardware engine used by some Qualcomm Technologies, Inc. (QTI)
+  SoCs to manage frequency in hardware. It is capable of controlling frequency
+  for multiple clusters.
+
+properties:
+  compatible:
+    oneOf:
+      - description: v1 of CPUFREQ HW
+        items:
+          - const: qcom,cpufreq-hw
+
+      - description: v2 of CPUFREQ HW (EPSS)
+        items:
+          - enum:
+              - qcom,sm8250-cpufreq-epss
+          - const: qcom,cpufreq-epss
+
+  reg:
+    minItems: 2
+    maxItems: 3
+    items:
+      - description: Frequency domain 0 register region
+      - description: Frequency domain 1 register region
+      - description: Frequency domain 2 register region
+
+  reg-names:
+    minItems: 2
+    maxItems: 3
+    items:
+      - const: freq-domain0
+      - const: freq-domain1
+      - const: freq-domain2
+
+  clocks:
+    items:
+      - description: XO Clock
+      - description: GPLL0 Clock
+
+  clock-names:
+    items:
+      - const: xo
+      - const: alternate
+
+  '#freq-domain-cells':
+    const: 1
+
+  qcom,freq-domain:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    maxItems: 1
+    description:
+      Devices supporting freq-domain must set their "qcom,freq-domain"
+      property with phandle to a cpufreq_hw followed by the Domain ID(0/1)
+      in the CPU DT node.
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - clocks
+  - clock-names
+  - '#freq-domain-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/qcom,gcc-sdm845.h>
+    #include <dt-bindings/clock/qcom,rpmh.h>
+
+    // Example 1: Dual-cluster, Quad-core per cluster. CPUs within a cluster
+    // switch DCVS state together.
+    cpus {
+      #address-cells = <2>;
+      #size-cells = <0>;
+
+      CPU0: cpu@0 {
+        device_type = "cpu";
+        compatible = "qcom,kryo385";
+        reg = <0x0 0x0>;
+        enable-method = "psci";
+        next-level-cache = <&L2_0>;
+        qcom,freq-domain = <&cpufreq_hw 0>;
+        L2_0: l2-cache {
+          compatible = "cache";
+          next-level-cache = <&L3_0>;
+          L3_0: l3-cache {
+            compatible = "cache";
+          };
+        };
+      };
+
+      CPU1: cpu@100 {
+        device_type = "cpu";
+        compatible = "qcom,kryo385";
+        reg = <0x0 0x100>;
+        enable-method = "psci";
+        next-level-cache = <&L2_100>;
+        qcom,freq-domain = <&cpufreq_hw 0>;
+        L2_100: l2-cache {
+          compatible = "cache";
+          next-level-cache = <&L3_0>;
+        };
+      };
+
+      CPU2: cpu@200 {
+        device_type = "cpu";
+        compatible = "qcom,kryo385";
+        reg = <0x0 0x200>;
+        enable-method = "psci";
+        next-level-cache = <&L2_200>;
+        qcom,freq-domain = <&cpufreq_hw 0>;
+        L2_200: l2-cache {
+          compatible = "cache";
+          next-level-cache = <&L3_0>;
+        };
+      };
+
+      CPU3: cpu@300 {
+        device_type = "cpu";
+        compatible = "qcom,kryo385";
+        reg = <0x0 0x300>;
+        enable-method = "psci";
+        next-level-cache = <&L2_300>;
+        qcom,freq-domain = <&cpufreq_hw 0>;
+        L2_300: l2-cache {
+          compatible = "cache";
+          next-level-cache = <&L3_0>;
+        };
+      };
+
+      CPU4: cpu@400 {
+        device_type = "cpu";
+        compatible = "qcom,kryo385";
+        reg = <0x0 0x400>;
+        enable-method = "psci";
+        next-level-cache = <&L2_400>;
+        qcom,freq-domain = <&cpufreq_hw 1>;
+        L2_400: l2-cache {
+          compatible = "cache";
+          next-level-cache = <&L3_0>;
+        };
+      };
+
+      CPU5: cpu@500 {
+        device_type = "cpu";
+        compatible = "qcom,kryo385";
+        reg = <0x0 0x500>;
+        enable-method = "psci";
+        next-level-cache = <&L2_500>;
+        qcom,freq-domain = <&cpufreq_hw 1>;
+        L2_500: l2-cache {
+          compatible = "cache";
+          next-level-cache = <&L3_0>;
+        };
+      };
+
+      CPU6: cpu@600 {
+        device_type = "cpu";
+        compatible = "qcom,kryo385";
+        reg = <0x0 0x600>;
+        enable-method = "psci";
+        next-level-cache = <&L2_600>;
+        qcom,freq-domain = <&cpufreq_hw 1>;
+        L2_600: l2-cache {
+          compatible = "cache";
+          next-level-cache = <&L3_0>;
+        };
+      };
+
+      CPU7: cpu@700 {
+        device_type = "cpu";
+        compatible = "qcom,kryo385";
+        reg = <0x0 0x700>;
+        enable-method = "psci";
+        next-level-cache = <&L2_700>;
+        qcom,freq-domain = <&cpufreq_hw 1>;
+        L2_700: l2-cache {
+          compatible = "cache";
+          next-level-cache = <&L3_0>;
+        };
+      };
+    };
+
+    soc {
+      #address-cells = <1>;
+      #size-cells = <1>;
+
+      cpufreq@17d43000 {
+        compatible = "qcom,cpufreq-hw";
+        reg = <0x17d43000 0x1400>, <0x17d45800 0x1400>;
+        reg-names = "freq-domain0", "freq-domain1";
+
+        clocks = <&rpmhcc RPMH_CXO_CLK>, <&gcc GPLL0>;
+        clock-names = "xo", "alternate";
+
+        #freq-domain-cells = <1>;
+      };
+    };
+...