[PATCH 12/36] dt-bindings: arm: Convert cpu binding to json-schema
Rob Herring
robh at kernel.org
Sat Oct 6 02:58:24 AEST 2018
Convert ARM CPU binding to DT schema format using json-schema.
Cc: Mark Rutland <mark.rutland at arm.com>
Cc: Matthias Brugger <matthias.bgg at gmail.com>
Cc: devicetree at vger.kernel.org
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-mediatek at lists.infradead.org
Signed-off-by: Rob Herring <robh at kernel.org>
---
.../devicetree/bindings/arm/cpus.txt | 490 -----------------
.../devicetree/bindings/arm/cpus.yaml | 503 ++++++++++++++++++
2 files changed, 503 insertions(+), 490 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/arm/cpus.txt
create mode 100644 Documentation/devicetree/bindings/arm/cpus.yaml
diff --git a/Documentation/devicetree/bindings/arm/cpus.txt b/Documentation/devicetree/bindings/arm/cpus.txt
deleted file mode 100644
index b0198a1cf403..000000000000
--- a/Documentation/devicetree/bindings/arm/cpus.txt
+++ /dev/null
@@ -1,490 +0,0 @@
-=================
-ARM CPUs bindings
-=================
-
-The device tree allows to describe the layout of CPUs in a system through
-the "cpus" node, which in turn contains a number of subnodes (ie "cpu")
-defining properties for every cpu.
-
-Bindings for CPU nodes follow the Devicetree Specification, available from:
-
-https://www.devicetree.org/specifications/
-
-with updates for 32-bit and 64-bit ARM systems provided in this document.
-
-================================
-Convention used in this document
-================================
-
-This document follows the conventions described in the Devicetree
-Specification, with the addition:
-
-- square brackets define bitfields, eg reg[7:0] value of the bitfield in
- the reg property contained in bits 7 down to 0
-
-=====================================
-cpus and cpu node bindings definition
-=====================================
-
-The ARM architecture, in accordance with the Devicetree Specification,
-requires the cpus and cpu nodes to be present and contain the properties
-described below.
-
-- cpus node
-
- Description: Container of cpu nodes
-
- The node name must be "cpus".
-
- A cpus node must define the following properties:
-
- - #address-cells
- Usage: required
- Value type: <u32>
-
- Definition depends on ARM architecture version and
- configuration:
-
- # On uniprocessor ARM architectures previous to v7
- value must be 1, to enable a simple enumeration
- scheme for processors that do not have a HW CPU
- identification register.
- # On 32-bit ARM 11 MPcore, ARM v7 or later systems
- value must be 1, that corresponds to CPUID/MPIDR
- registers sizes.
- # On ARM v8 64-bit systems value should be set to 2,
- that corresponds to the MPIDR_EL1 register size.
- If MPIDR_EL1[63:32] value is equal to 0 on all CPUs
- in the system, #address-cells can be set to 1, since
- MPIDR_EL1[63:32] bits are not used for CPUs
- identification.
- - #size-cells
- Usage: required
- Value type: <u32>
- Definition: must be set to 0
-
-- cpu node
-
- Description: Describes a CPU in an ARM based system
-
- PROPERTIES
-
- - device_type
- Usage: required
- Value type: <string>
- Definition: must be "cpu"
- - reg
- Usage and definition depend on ARM architecture version and
- configuration:
-
- # On uniprocessor ARM architectures previous to v7
- this property is required and must be set to 0.
-
- # On ARM 11 MPcore based systems this property is
- required and matches the CPUID[11:0] register bits.
-
- Bits [11:0] in the reg cell must be set to
- bits [11:0] in CPU ID register.
-
- All other bits in the reg cell must be set to 0.
-
- # On 32-bit ARM v7 or later systems this property is
- required and matches the CPU MPIDR[23:0] register
- bits.
-
- Bits [23:0] in the reg cell must be set to
- bits [23:0] in MPIDR.
-
- All other bits in the reg cell must be set to 0.
-
- # On ARM v8 64-bit systems this property is required
- and matches the MPIDR_EL1 register affinity bits.
-
- * If cpus node's #address-cells property is set to 2
-
- The first reg cell bits [7:0] must be set to
- bits [39:32] of MPIDR_EL1.
-
- The second reg cell bits [23:0] must be set to
- bits [23:0] of MPIDR_EL1.
-
- * If cpus node's #address-cells property is set to 1
-
- The reg cell bits [23:0] must be set to bits [23:0]
- of MPIDR_EL1.
-
- All other bits in the reg cells must be set to 0.
-
- - compatible:
- Usage: required
- Value type: <string>
- Definition: should be one of:
- "arm,arm710t"
- "arm,arm720t"
- "arm,arm740t"
- "arm,arm7ej-s"
- "arm,arm7tdmi"
- "arm,arm7tdmi-s"
- "arm,arm9es"
- "arm,arm9ej-s"
- "arm,arm920t"
- "arm,arm922t"
- "arm,arm925"
- "arm,arm926e-s"
- "arm,arm926ej-s"
- "arm,arm940t"
- "arm,arm946e-s"
- "arm,arm966e-s"
- "arm,arm968e-s"
- "arm,arm9tdmi"
- "arm,arm1020e"
- "arm,arm1020t"
- "arm,arm1022e"
- "arm,arm1026ej-s"
- "arm,arm1136j-s"
- "arm,arm1136jf-s"
- "arm,arm1156t2-s"
- "arm,arm1156t2f-s"
- "arm,arm1176jzf"
- "arm,arm1176jz-s"
- "arm,arm1176jzf-s"
- "arm,arm11mpcore"
- "arm,cortex-a5"
- "arm,cortex-a7"
- "arm,cortex-a8"
- "arm,cortex-a9"
- "arm,cortex-a12"
- "arm,cortex-a15"
- "arm,cortex-a17"
- "arm,cortex-a53"
- "arm,cortex-a57"
- "arm,cortex-a72"
- "arm,cortex-a73"
- "arm,cortex-m0"
- "arm,cortex-m0+"
- "arm,cortex-m1"
- "arm,cortex-m3"
- "arm,cortex-m4"
- "arm,cortex-r4"
- "arm,cortex-r5"
- "arm,cortex-r7"
- "brcm,brahma-b15"
- "brcm,brahma-b53"
- "brcm,vulcan"
- "cavium,thunder"
- "cavium,thunder2"
- "faraday,fa526"
- "intel,sa110"
- "intel,sa1100"
- "marvell,feroceon"
- "marvell,mohawk"
- "marvell,pj4a"
- "marvell,pj4b"
- "marvell,sheeva-v5"
- "nvidia,tegra132-denver"
- "nvidia,tegra186-denver"
- "nvidia,tegra194-carmel"
- "qcom,krait"
- "qcom,kryo"
- "qcom,kryo385"
- "qcom,scorpion"
- - enable-method
- Value type: <stringlist>
- Usage and definition depend on ARM architecture version.
- # On ARM v8 64-bit this property is required and must
- be one of:
- "psci"
- "spin-table"
- # On ARM 32-bit systems this property is optional and
- can be one of:
- "actions,s500-smp"
- "allwinner,sun6i-a31"
- "allwinner,sun8i-a23"
- "allwinner,sun9i-a80-smp"
- "amlogic,meson8-smp"
- "amlogic,meson8b-smp"
- "arm,realview-smp"
- "brcm,bcm11351-cpu-method"
- "brcm,bcm23550"
- "brcm,bcm2836-smp"
- "brcm,bcm-nsp-smp"
- "brcm,brahma-b15"
- "marvell,armada-375-smp"
- "marvell,armada-380-smp"
- "marvell,armada-390-smp"
- "marvell,armada-xp-smp"
- "marvell,98dx3236-smp"
- "mediatek,mt6589-smp"
- "mediatek,mt81xx-tz-smp"
- "qcom,gcc-msm8660"
- "qcom,kpss-acc-v1"
- "qcom,kpss-acc-v2"
- "renesas,apmu"
- "renesas,r9a06g032-smp"
- "rockchip,rk3036-smp"
- "rockchip,rk3066-smp"
- "ste,dbx500-smp"
-
- - cpu-release-addr
- Usage: required for systems that have an "enable-method"
- property value of "spin-table".
- Value type: <prop-encoded-array>
- Definition:
- # On ARM v8 64-bit systems must be a two cell
- property identifying a 64-bit zero-initialised
- memory location.
-
- - qcom,saw
- Usage: required for systems that have an "enable-method"
- property value of "qcom,kpss-acc-v1" or
- "qcom,kpss-acc-v2"
- Value type: <phandle>
- Definition: Specifies the SAW[1] node associated with this CPU.
-
- - qcom,acc
- Usage: required for systems that have an "enable-method"
- property value of "qcom,kpss-acc-v1" or
- "qcom,kpss-acc-v2"
- Value type: <phandle>
- Definition: Specifies the ACC[2] node associated with this CPU.
-
- - cpu-idle-states
- Usage: Optional
- Value type: <prop-encoded-array>
- Definition:
- # List of phandles to idle state nodes supported
- by this cpu [3].
-
- - capacity-dmips-mhz
- Usage: Optional
- Value type: <u32>
- Definition:
- # u32 value representing CPU capacity [4] in
- DMIPS/MHz, relative to highest capacity-dmips-mhz
- in the system.
-
- - rockchip,pmu
- Usage: optional for systems that have an "enable-method"
- property value of "rockchip,rk3066-smp"
- While optional, it is the preferred way to get access to
- the cpu-core power-domains.
- Value type: <phandle>
- Definition: Specifies the syscon node controlling the cpu core
- power domains.
-
- - dynamic-power-coefficient
- Usage: optional
- Value type: <prop-encoded-array>
- Definition: A u32 value that represents the running time dynamic
- power coefficient in units of uW/MHz/V^2. The
- coefficient can either be calculated from power
- measurements or derived by analysis.
-
- The dynamic power consumption of the CPU is
- proportional to the square of the Voltage (V) and
- the clock frequency (f). The coefficient is used to
- calculate the dynamic power as below -
-
- Pdyn = dynamic-power-coefficient * V^2 * f
-
- where voltage is in V, frequency is in MHz.
-
-Example 1 (dual-cluster big.LITTLE system 32-bit):
-
- cpus {
- #size-cells = <0>;
- #address-cells = <1>;
-
- cpu at 0 {
- device_type = "cpu";
- compatible = "arm,cortex-a15";
- reg = <0x0>;
- };
-
- cpu at 1 {
- device_type = "cpu";
- compatible = "arm,cortex-a15";
- reg = <0x1>;
- };
-
- cpu at 100 {
- device_type = "cpu";
- compatible = "arm,cortex-a7";
- reg = <0x100>;
- };
-
- cpu at 101 {
- device_type = "cpu";
- compatible = "arm,cortex-a7";
- reg = <0x101>;
- };
- };
-
-Example 2 (Cortex-A8 uniprocessor 32-bit system):
-
- cpus {
- #size-cells = <0>;
- #address-cells = <1>;
-
- cpu at 0 {
- device_type = "cpu";
- compatible = "arm,cortex-a8";
- reg = <0x0>;
- };
- };
-
-Example 3 (ARM 926EJ-S uniprocessor 32-bit system):
-
- cpus {
- #size-cells = <0>;
- #address-cells = <1>;
-
- cpu at 0 {
- device_type = "cpu";
- compatible = "arm,arm926ej-s";
- reg = <0x0>;
- };
- };
-
-Example 4 (ARM Cortex-A57 64-bit system):
-
-cpus {
- #size-cells = <0>;
- #address-cells = <2>;
-
- cpu at 0 {
- device_type = "cpu";
- compatible = "arm,cortex-a57";
- reg = <0x0 0x0>;
- enable-method = "spin-table";
- cpu-release-addr = <0 0x20000000>;
- };
-
- cpu at 1 {
- device_type = "cpu";
- compatible = "arm,cortex-a57";
- reg = <0x0 0x1>;
- enable-method = "spin-table";
- cpu-release-addr = <0 0x20000000>;
- };
-
- cpu at 100 {
- device_type = "cpu";
- compatible = "arm,cortex-a57";
- reg = <0x0 0x100>;
- enable-method = "spin-table";
- cpu-release-addr = <0 0x20000000>;
- };
-
- cpu at 101 {
- device_type = "cpu";
- compatible = "arm,cortex-a57";
- reg = <0x0 0x101>;
- enable-method = "spin-table";
- cpu-release-addr = <0 0x20000000>;
- };
-
- cpu at 10000 {
- device_type = "cpu";
- compatible = "arm,cortex-a57";
- reg = <0x0 0x10000>;
- enable-method = "spin-table";
- cpu-release-addr = <0 0x20000000>;
- };
-
- cpu at 10001 {
- device_type = "cpu";
- compatible = "arm,cortex-a57";
- reg = <0x0 0x10001>;
- enable-method = "spin-table";
- cpu-release-addr = <0 0x20000000>;
- };
-
- cpu at 10100 {
- device_type = "cpu";
- compatible = "arm,cortex-a57";
- reg = <0x0 0x10100>;
- enable-method = "spin-table";
- cpu-release-addr = <0 0x20000000>;
- };
-
- cpu at 10101 {
- device_type = "cpu";
- compatible = "arm,cortex-a57";
- reg = <0x0 0x10101>;
- enable-method = "spin-table";
- cpu-release-addr = <0 0x20000000>;
- };
-
- cpu at 100000000 {
- device_type = "cpu";
- compatible = "arm,cortex-a57";
- reg = <0x1 0x0>;
- enable-method = "spin-table";
- cpu-release-addr = <0 0x20000000>;
- };
-
- cpu at 100000001 {
- device_type = "cpu";
- compatible = "arm,cortex-a57";
- reg = <0x1 0x1>;
- enable-method = "spin-table";
- cpu-release-addr = <0 0x20000000>;
- };
-
- cpu at 100000100 {
- device_type = "cpu";
- compatible = "arm,cortex-a57";
- reg = <0x1 0x100>;
- enable-method = "spin-table";
- cpu-release-addr = <0 0x20000000>;
- };
-
- cpu at 100000101 {
- device_type = "cpu";
- compatible = "arm,cortex-a57";
- reg = <0x1 0x101>;
- enable-method = "spin-table";
- cpu-release-addr = <0 0x20000000>;
- };
-
- cpu at 100010000 {
- device_type = "cpu";
- compatible = "arm,cortex-a57";
- reg = <0x1 0x10000>;
- enable-method = "spin-table";
- cpu-release-addr = <0 0x20000000>;
- };
-
- cpu at 100010001 {
- device_type = "cpu";
- compatible = "arm,cortex-a57";
- reg = <0x1 0x10001>;
- enable-method = "spin-table";
- cpu-release-addr = <0 0x20000000>;
- };
-
- cpu at 100010100 {
- device_type = "cpu";
- compatible = "arm,cortex-a57";
- reg = <0x1 0x10100>;
- enable-method = "spin-table";
- cpu-release-addr = <0 0x20000000>;
- };
-
- cpu at 100010101 {
- device_type = "cpu";
- compatible = "arm,cortex-a57";
- reg = <0x1 0x10101>;
- enable-method = "spin-table";
- cpu-release-addr = <0 0x20000000>;
- };
-};
-
---
-[1] arm/msm/qcom,saw2.txt
-[2] arm/msm/qcom,kpss-acc.txt
-[3] ARM Linux kernel documentation - idle states bindings
- Documentation/devicetree/bindings/arm/idle-states.txt
-[4] ARM Linux kernel documentation - cpu capacity bindings
- Documentation/devicetree/bindings/arm/cpu-capacity.txt
diff --git a/Documentation/devicetree/bindings/arm/cpus.yaml b/Documentation/devicetree/bindings/arm/cpus.yaml
new file mode 100644
index 000000000000..bb75914324a3
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/cpus.yaml
@@ -0,0 +1,503 @@
+# SPDX-License-Identifier: None
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/bindings/arm/cpus.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ARM CPUs bindings
+
+maintainers:
+ - Lorenzo Pieralisi <lorenzo.pieralisi at arm.com>
+
+description: |+
+ The device tree allows to describe the layout of CPUs in a system through
+ the "cpus" node, which in turn contains a number of subnodes (ie "cpu")
+ defining properties for every cpu.
+
+ Bindings for CPU nodes follow the Devicetree Specification, available from:
+
+ https://www.devicetree.org/specifications/
+
+ with updates for 32-bit and 64-bit ARM systems provided in this document.
+
+ ================================
+ Convention used in this document
+ ================================
+
+ This document follows the conventions described in the Devicetree
+ Specification, with the addition:
+
+ - square brackets define bitfields, eg reg[7:0] value of the bitfield in
+ the reg property contained in bits 7 down to 0
+
+ =====================================
+ cpus and cpu node bindings definition
+ =====================================
+
+ The ARM architecture, in accordance with the Devicetree Specification,
+ requires the cpus and cpu nodes to be present and contain the properties
+ described below.
+
+properties:
+ $nodename:
+ const: cpus
+ description: Container of cpu nodes
+
+ '#address-cells':
+ enum: [1, 2]
+ description: |
+ Definition depends on ARM architecture version and configuration:
+
+ On uniprocessor ARM architectures previous to v7
+ value must be 1, to enable a simple enumeration
+ scheme for processors that do not have a HW CPU
+ identification register.
+ On 32-bit ARM 11 MPcore, ARM v7 or later systems
+ value must be 1, that corresponds to CPUID/MPIDR
+ registers sizes.
+ On ARM v8 64-bit systems value should be set to 2,
+ that corresponds to the MPIDR_EL1 register size.
+ If MPIDR_EL1[63:32] value is equal to 0 on all CPUs
+ in the system, #address-cells can be set to 1, since
+ MPIDR_EL1[63:32] bits are not used for CPUs
+ identification.
+
+ '#size-cells':
+ const: 0
+
+patternProperties:
+ '^cpu@[0-9a-f]+$':
+ properties:
+ device_type:
+ const: cpu
+
+ reg:
+ maxItems: 1
+ description: |
+ Usage and definition depend on ARM architecture version and
+ configuration:
+
+ On uniprocessor ARM architectures previous to v7
+ this property is required and must be set to 0.
+
+ On ARM 11 MPcore based systems this property is
+ required and matches the CPUID[11:0] register bits.
+
+ Bits [11:0] in the reg cell must be set to
+ bits [11:0] in CPU ID register.
+
+ All other bits in the reg cell must be set to 0.
+
+ On 32-bit ARM v7 or later systems this property is
+ required and matches the CPU MPIDR[23:0] register
+ bits.
+
+ Bits [23:0] in the reg cell must be set to
+ bits [23:0] in MPIDR.
+
+ All other bits in the reg cell must be set to 0.
+
+ On ARM v8 64-bit systems this property is required
+ and matches the MPIDR_EL1 register affinity bits.
+
+ * If cpus node's #address-cells property is set to 2
+
+ The first reg cell bits [7:0] must be set to
+ bits [39:32] of MPIDR_EL1.
+
+ The second reg cell bits [23:0] must be set to
+ bits [23:0] of MPIDR_EL1.
+
+ * If cpus node's #address-cells property is set to 1
+
+ The reg cell bits [23:0] must be set to bits [23:0]
+ of MPIDR_EL1.
+
+ All other bits in the reg cells must be set to 0.
+
+ compatible:
+ items:
+ - enum:
+ - arm,arm710t
+ - arm,arm720t
+ - arm,arm740t
+ - arm,arm7ej-s
+ - arm,arm7tdmi
+ - arm,arm7tdmi-s
+ - arm,arm9es
+ - arm,arm9ej-s
+ - arm,arm920t
+ - arm,arm922t
+ - arm,arm925
+ - arm,arm926e-s
+ - arm,arm926ej-s
+ - arm,arm940t
+ - arm,arm946e-s
+ - arm,arm966e-s
+ - arm,arm968e-s
+ - arm,arm9tdmi
+ - arm,arm1020e
+ - arm,arm1020t
+ - arm,arm1022e
+ - arm,arm1026ej-s
+ - arm,arm1136j-s
+ - arm,arm1136jf-s
+ - arm,arm1156t2-s
+ - arm,arm1156t2f-s
+ - arm,arm1176jzf
+ - arm,arm1176jz-s
+ - arm,arm1176jzf-s
+ - arm,arm11mpcore
+ - arm,cortex-a5
+ - arm,cortex-a7
+ - arm,cortex-a8
+ - arm,cortex-a9
+ - arm,cortex-a12
+ - arm,cortex-a15
+ - arm,cortex-a17
+ - arm,cortex-a53
+ - arm,cortex-a57
+ - arm,cortex-a72
+ - arm,cortex-a73
+ - arm,cortex-m0
+ - arm,cortex-m0+
+ - arm,cortex-m1
+ - arm,cortex-m3
+ - arm,cortex-m4
+ - arm,cortex-r4
+ - arm,cortex-r5
+ - arm,cortex-r7
+ - brcm,brahma-b15
+ - brcm,brahma-b53
+ - brcm,vulcan
+ - cavium,thunder
+ - cavium,thunder2
+ - faraday,fa526
+ - intel,sa110
+ - intel,sa1100
+ - marvell,feroceon
+ - marvell,mohawk
+ - marvell,pj4a
+ - marvell,pj4b
+ - marvell,sheeva-v5
+ - nvidia,tegra132-denver
+ - nvidia,tegra186-denver
+ - nvidia,tegra194-carmel
+ - qcom,krait
+ - qcom,kryo
+ - qcom,kryo385
+ - qcom,scorpion
+
+ enable-method:
+ allOf:
+ - $ref: '/schemas/types.yaml#/definitions/string'
+ - oneOf:
+ # On ARM v8 64-bit this property is required
+ - enum:
+ - psci
+ - spin-table
+ # On ARM 32-bit systems this property is optional
+ - enum:
+ - actions,s500-smp
+ - allwinner,sun6i-a31
+ - allwinner,sun8i-a23
+ - allwinner,sun9i-a80-smp
+ - allwinner,sun8i-a83t-smp
+ - amlogic,meson8-smp
+ - amlogic,meson8b-smp
+ - arm,realview-smp
+ - brcm,bcm11351-cpu-method
+ - brcm,bcm23550
+ - brcm,bcm2836-smp
+ - brcm,bcm63138
+ - brcm,bcm-nsp-smp
+ - brcm,brahma-b15
+ - marvell,armada-375-smp
+ - marvell,armada-380-smp
+ - marvell,armada-390-smp
+ - marvell,armada-xp-smp
+ - marvell,98dx3236-smp
+ - mediatek,mt6589-smp
+ - mediatek,mt81xx-tz-smp
+ - qcom,gcc-msm8660
+ - qcom,kpss-acc-v1
+ - qcom,kpss-acc-v2
+ - renesas,apmu
+ - renesas,r9a06g032-smp
+ - rockchip,rk3036-smp
+ - rockchip,rk3066-smp
+ - ste,dbx500-smp
+
+ cpu-release-addr:
+ $ref: '/schemas/types.yaml#/definitions/uint64'
+
+ description:
+ Required for systems that have an "enable-method"
+ property value of "spin-table".
+ On ARM v8 64-bit systems must be a two cell
+ property identifying a 64-bit zero-initialised
+ memory location.
+
+ qcom,saw:
+ $ref: '/schemas/types.yaml#/definitions/phandle'
+ description: |
+ Usage: required for systems that have an "enable-method"
+ property value of "qcom,kpss-acc-v1" or
+ "qcom,kpss-acc-v2"
+ Definition: Specifies the SAW[1] node associated with this CPU.
+
+ qcom,acc:
+ $ref: '/schemas/types.yaml#/definitions/phandle'
+ description: |
+ Usage: required for systems that have an "enable-method"
+ property value of "qcom,kpss-acc-v1" or
+ "qcom,kpss-acc-v2"
+ Definition: Specifies the ACC[2] node associated with this CPU.
+
+ cpu-idle-states:
+ $ref: '/schemas/types.yaml#/definitions/phandle-array'
+ description: |
+ Usage: Optional
+ Value type: <prop-encoded-array>
+ description: List of phandles to idle state nodes supported
+ by this cpu [3].
+
+ capacity-dmips-mhz:
+ $ref: '/schemas/types.yaml#/definitions/uint32'
+ description:
+ u32 value representing CPU capacity [4] in
+ DMIPS/MHz, relative to highest capacity-dmips-mhz
+ in the system.
+
+ rockchip,pmu:
+ description: |
+ Optional for systems that have an "enable-method"
+ property value of "rockchip,rk3066-smp"
+ While optional, it is the preferred way to get access to
+ the cpu-core power-domains.
+ Value type: <phandle>
+ Definition: Specifies the syscon node controlling the cpu core
+ power domains.
+
+ dynamic-power-coefficient:
+ $ref: '/schemas/types.yaml#/definitions/uint32'
+ description:
+ A u32 value that represents the running time dynamic
+ power coefficient in units of uW/MHz/V^2. The
+ coefficient can either be calculated from power
+ measurements or derived by analysis.
+
+ The dynamic power consumption of the CPU is
+ proportional to the square of the Voltage (V) and
+ the clock frequency (f). The coefficient is used to
+ calculate the dynamic power as below -
+
+ Pdyn = dynamic-power-coefficient * V^2 * f
+
+ where voltage is in V, frequency is in MHz.
+
+ required:
+ - device_type
+ - reg
+ - compatible
+
+ dependencies:
+ cpu-release-addr: [enable-method]
+ rockchip,pmu: [enable-method]
+
+required:
+ - '#address-cells'
+ - '#size-cells'
+
+examples:
+ - |
+ cpus {
+ #size-cells = <0>;
+ #address-cells = <1>;
+
+ cpu at 0 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a15";
+ reg = <0x0>;
+ };
+
+ cpu at 1 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a15";
+ reg = <0x1>;
+ };
+
+ cpu at 100 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a7";
+ reg = <0x100>;
+ };
+
+ cpu at 101 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a7";
+ reg = <0x101>;
+ };
+ };
+
+ - |
+ // Example 2 (Cortex-A8 uniprocessor 32-bit system):
+ cpus {
+ #size-cells = <0>;
+ #address-cells = <1>;
+
+ cpu at 0 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a8";
+ reg = <0x0>;
+ };
+ };
+
+ - |
+ // Example 3 (ARM 926EJ-S uniprocessor 32-bit system):
+ cpus {
+ #size-cells = <0>;
+ #address-cells = <1>;
+
+ cpu at 0 {
+ device_type = "cpu";
+ compatible = "arm,arm926ej-s";
+ reg = <0x0>;
+ };
+ };
+
+ - |
+ // Example 4 (ARM Cortex-A57 64-bit system):
+ cpus {
+ #size-cells = <0>;
+ #address-cells = <2>;
+
+ cpu at 0 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a57";
+ reg = <0x0 0x0>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0x20000000>;
+ };
+
+ cpu at 1 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a57";
+ reg = <0x0 0x1>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0x20000000>;
+ };
+
+ cpu at 100 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a57";
+ reg = <0x0 0x100>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0x20000000>;
+ };
+
+ cpu at 101 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a57";
+ reg = <0x0 0x101>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0x20000000>;
+ };
+
+ cpu at 10000 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a57";
+ reg = <0x0 0x10000>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0x20000000>;
+ };
+
+ cpu at 10001 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a57";
+ reg = <0x0 0x10001>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0x20000000>;
+ };
+
+ cpu at 10100 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a57";
+ reg = <0x0 0x10100>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0x20000000>;
+ };
+
+ cpu at 10101 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a57";
+ reg = <0x0 0x10101>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0x20000000>;
+ };
+
+ cpu at 100000000 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a57";
+ reg = <0x1 0x0>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0x20000000>;
+ };
+
+ cpu at 100000001 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a57";
+ reg = <0x1 0x1>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0x20000000>;
+ };
+
+ cpu at 100000100 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a57";
+ reg = <0x1 0x100>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0x20000000>;
+ };
+
+ cpu at 100000101 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a57";
+ reg = <0x1 0x101>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0x20000000>;
+ };
+
+ cpu at 100010000 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a57";
+ reg = <0x1 0x10000>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0x20000000>;
+ };
+
+ cpu at 100010001 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a57";
+ reg = <0x1 0x10001>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0x20000000>;
+ };
+
+ cpu at 100010100 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a57";
+ reg = <0x1 0x10100>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0x20000000>;
+ };
+
+ cpu at 100010101 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a57";
+ reg = <0x1 0x10101>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0x20000000>;
+ };
+ };
+...
--
2.17.1
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