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linuxdebug/Documentation/devicetree/bindings/opp/opp-v2-kryo-cpu.yaml

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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/opp/opp-v2-kryo-cpu.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Qualcomm Technologies, Inc. NVMEM OPP bindings
maintainers:
- Ilia Lin <ilia.lin@kernel.org>
allOf:
- $ref: opp-v2-base.yaml#
description: |
In certain Qualcomm Technologies, Inc. SoCs like APQ8096 and MSM8996,
the CPU frequencies subset and voltage value of each OPP varies based on
the silicon variant in use.
Qualcomm Technologies, Inc. Process Voltage Scaling Tables
defines the voltage and frequency value based on the speedbin blown in
the efuse combination.
The qcom-cpufreq-nvmem driver reads the efuse value from the SoC to provide
the OPP framework with required information (existing HW bitmap).
This is used to determine the voltage and frequency value for each OPP of
operating-points-v2 table when it is parsed by the OPP framework.
properties:
compatible:
const: operating-points-v2-kryo-cpu
nvmem-cells:
description: |
A phandle pointing to a nvmem-cells node representing the
efuse registers that has information about the
speedbin that is used to select the right frequency/voltage
value pair.
opp-shared: true
patternProperties:
'^opp-?[0-9]+$':
type: object
additionalProperties: false
properties:
opp-hz: true
opp-microvolt: true
opp-supported-hw:
description: |
A single 32 bit bitmap value, representing compatible HW.
Bitmap:
0: MSM8996, speedbin 0
1: MSM8996, speedbin 1
2: MSM8996, speedbin 2
3-31: unused
maximum: 0x7
clock-latency-ns: true
required-opps: true
required:
- opp-hz
required:
- compatible
if:
required:
- nvmem-cells
then:
patternProperties:
'^opp-?[0-9]+$':
required:
- opp-supported-hw
additionalProperties: false
examples:
- |
/ {
model = "Qualcomm Technologies, Inc. DB820c";
compatible = "arrow,apq8096-db820c", "qcom,apq8096-sbc", "qcom,apq8096";
#address-cells = <2>;
#size-cells = <2>;
cpus {
#address-cells = <2>;
#size-cells = <0>;
CPU0: cpu@0 {
device_type = "cpu";
compatible = "qcom,kryo";
reg = <0x0 0x0>;
enable-method = "psci";
cpu-idle-states = <&CPU_SLEEP_0>;
capacity-dmips-mhz = <1024>;
clocks = <&kryocc 0>;
operating-points-v2 = <&cluster0_opp>;
power-domains = <&cpr>;
power-domain-names = "cpr";
#cooling-cells = <2>;
next-level-cache = <&L2_0>;
L2_0: l2-cache {
compatible = "cache";
cache-level = <2>;
};
};
CPU1: cpu@1 {
device_type = "cpu";
compatible = "qcom,kryo";
reg = <0x0 0x1>;
enable-method = "psci";
cpu-idle-states = <&CPU_SLEEP_0>;
capacity-dmips-mhz = <1024>;
clocks = <&kryocc 0>;
operating-points-v2 = <&cluster0_opp>;
power-domains = <&cpr>;
power-domain-names = "cpr";
#cooling-cells = <2>;
next-level-cache = <&L2_0>;
};
CPU2: cpu@100 {
device_type = "cpu";
compatible = "qcom,kryo";
reg = <0x0 0x100>;
enable-method = "psci";
cpu-idle-states = <&CPU_SLEEP_0>;
capacity-dmips-mhz = <1024>;
clocks = <&kryocc 1>;
operating-points-v2 = <&cluster1_opp>;
power-domains = <&cpr>;
power-domain-names = "cpr";
#cooling-cells = <2>;
next-level-cache = <&L2_1>;
L2_1: l2-cache {
compatible = "cache";
cache-level = <2>;
};
};
CPU3: cpu@101 {
device_type = "cpu";
compatible = "qcom,kryo";
reg = <0x0 0x101>;
enable-method = "psci";
cpu-idle-states = <&CPU_SLEEP_0>;
capacity-dmips-mhz = <1024>;
clocks = <&kryocc 1>;
operating-points-v2 = <&cluster1_opp>;
power-domains = <&cpr>;
power-domain-names = "cpr";
#cooling-cells = <2>;
next-level-cache = <&L2_1>;
};
cpu-map {
cluster0 {
core0 {
cpu = <&CPU0>;
};
core1 {
cpu = <&CPU1>;
};
};
cluster1 {
core0 {
cpu = <&CPU2>;
};
core1 {
cpu = <&CPU3>;
};
};
};
};
cluster0_opp: opp-table-0 {
compatible = "operating-points-v2-kryo-cpu";
nvmem-cells = <&speedbin_efuse>;
opp-shared;
opp-307200000 {
opp-hz = /bits/ 64 <307200000>;
opp-microvolt = <905000 905000 1140000>;
opp-supported-hw = <0x7>;
clock-latency-ns = <200000>;
required-opps = <&cpr_opp1>;
};
opp-1401600000 {
opp-hz = /bits/ 64 <1401600000>;
opp-microvolt = <1140000 905000 1140000>;
opp-supported-hw = <0x5>;
clock-latency-ns = <200000>;
required-opps = <&cpr_opp2>;
};
opp-1593600000 {
opp-hz = /bits/ 64 <1593600000>;
opp-microvolt = <1140000 905000 1140000>;
opp-supported-hw = <0x1>;
clock-latency-ns = <200000>;
required-opps = <&cpr_opp3>;
};
};
cluster1_opp: opp-table-1 {
compatible = "operating-points-v2-kryo-cpu";
nvmem-cells = <&speedbin_efuse>;
opp-shared;
opp-307200000 {
opp-hz = /bits/ 64 <307200000>;
opp-microvolt = <905000 905000 1140000>;
opp-supported-hw = <0x7>;
clock-latency-ns = <200000>;
required-opps = <&cpr_opp1>;
};
opp-1804800000 {
opp-hz = /bits/ 64 <1804800000>;
opp-microvolt = <1140000 905000 1140000>;
opp-supported-hw = <0x6>;
clock-latency-ns = <200000>;
required-opps = <&cpr_opp4>;
};
opp-1900800000 {
opp-hz = /bits/ 64 <1900800000>;
opp-microvolt = <1140000 905000 1140000>;
opp-supported-hw = <0x4>;
clock-latency-ns = <200000>;
required-opps = <&cpr_opp5>;
};
opp-2150400000 {
opp-hz = /bits/ 64 <2150400000>;
opp-microvolt = <1140000 905000 1140000>;
opp-supported-hw = <0x1>;
clock-latency-ns = <200000>;
required-opps = <&cpr_opp6>;
};
};
smem {
compatible = "qcom,smem";
memory-region = <&smem_mem>;
hwlocks = <&tcsr_mutex 3>;
};
soc {
#address-cells = <1>;
#size-cells = <1>;
qfprom: qfprom@74000 {
compatible = "qcom,msm8996-qfprom", "qcom,qfprom";
reg = <0x00074000 0x8ff>;
#address-cells = <1>;
#size-cells = <1>;
speedbin_efuse: speedbin@133 {
reg = <0x133 0x1>;
bits = <5 3>;
};
};
};
};