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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/cpufreq/qcom-cpufreq-nvmem.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Qualcomm Technologies, Inc. NVMEM CPUFreq bindings
maintainers:
- Ilia Lin <ilia.lin@kernel.org>
description: |
In certain Qualcomm Technologies, Inc. SoCs such as QCS404, The CPU supply
voltage is dynamically configured by Core Power Reduction (CPR) depending on
current CPU frequency and efuse values.
CPR provides a power domain with multiple levels that are selected depending
on the CPU OPP in use. The CPUFreq driver sets the CPR power domain level
according to the required OPPs defined in the CPU OPP tables.
select:
properties:
compatible:
contains:
enum:
- qcom,qcs404
required:
- compatible
properties:
cpus:
type: object
patternProperties:
'cpu@[0-9a-f]+':
type: object
properties:
power-domains:
maxItems: 1
power-domain-names:
items:
- const: cpr
required:
- power-domains
- power-domain-names
patternProperties:
'^opp-table(-[a-z0-9]+)?$':
if:
properties:
compatible:
const: operating-points-v2-kryo-cpu
then:
patternProperties:
'^opp-?[0-9]+$':
required:
- required-opps
additionalProperties: true
examples:
- |
/ {
model = "Qualcomm Technologies, Inc. QCS404";
compatible = "qcom,qcs404";
#address-cells = <2>;
#size-cells = <2>;
cpus {
#address-cells = <1>;
#size-cells = <0>;
CPU0: cpu@100 {
device_type = "cpu";
compatible = "arm,cortex-a53";
reg = <0x100>;
enable-method = "psci";
cpu-idle-states = <&CPU_SLEEP_0>;
next-level-cache = <&L2_0>;
#cooling-cells = <2>;
clocks = <&apcs_glb>;
operating-points-v2 = <&cpu_opp_table>;
power-domains = <&cpr>;
power-domain-names = "cpr";
};
CPU1: cpu@101 {
device_type = "cpu";
compatible = "arm,cortex-a53";
reg = <0x101>;
enable-method = "psci";
cpu-idle-states = <&CPU_SLEEP_0>;
next-level-cache = <&L2_0>;
#cooling-cells = <2>;
clocks = <&apcs_glb>;
operating-points-v2 = <&cpu_opp_table>;
power-domains = <&cpr>;
power-domain-names = "cpr";
};
CPU2: cpu@102 {
device_type = "cpu";
compatible = "arm,cortex-a53";
reg = <0x102>;
enable-method = "psci";
cpu-idle-states = <&CPU_SLEEP_0>;
next-level-cache = <&L2_0>;
#cooling-cells = <2>;
clocks = <&apcs_glb>;
operating-points-v2 = <&cpu_opp_table>;
power-domains = <&cpr>;
power-domain-names = "cpr";
};
CPU3: cpu@103 {
device_type = "cpu";
compatible = "arm,cortex-a53";
reg = <0x103>;
enable-method = "psci";
cpu-idle-states = <&CPU_SLEEP_0>;
next-level-cache = <&L2_0>;
#cooling-cells = <2>;
clocks = <&apcs_glb>;
operating-points-v2 = <&cpu_opp_table>;
power-domains = <&cpr>;
power-domain-names = "cpr";
};
};
cpu_opp_table: opp-table-cpu {
compatible = "operating-points-v2-kryo-cpu";
opp-shared;
opp-1094400000 {
opp-hz = /bits/ 64 <1094400000>;
required-opps = <&cpr_opp1>;
};
opp-1248000000 {
opp-hz = /bits/ 64 <1248000000>;
required-opps = <&cpr_opp2>;
};
opp-1401600000 {
opp-hz = /bits/ 64 <1401600000>;
required-opps = <&cpr_opp3>;
};
};
cpr_opp_table: opp-table-cpr {
compatible = "operating-points-v2-qcom-level";
cpr_opp1: opp1 {
opp-level = <1>;
qcom,opp-fuse-level = <1>;
};
cpr_opp2: opp2 {
opp-level = <2>;
qcom,opp-fuse-level = <2>;
};
cpr_opp3: opp3 {
opp-level = <3>;
qcom,opp-fuse-level = <3>;
};
};
};
|
