cpufreq-mediatek-hw.yaml (1709B)
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/cpufreq/cpufreq-mediatek-hw.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: MediaTek's CPUFREQ Bindings 8 9maintainers: 10 - Hector Yuan <hector.yuan@mediatek.com> 11 12description: 13 CPUFREQ HW is a hardware engine used by MediaTek SoCs to 14 manage frequency in hardware. It is capable of controlling 15 frequency for multiple clusters. 16 17properties: 18 compatible: 19 const: mediatek,cpufreq-hw 20 21 reg: 22 minItems: 1 23 maxItems: 2 24 description: 25 Addresses and sizes for the memory of the HW bases in 26 each frequency domain. Each entry corresponds to 27 a register bank for each frequency domain present. 28 29 "#performance-domain-cells": 30 description: 31 Number of cells in a performance domain specifier. 32 Set const to 1 here for nodes providing multiple 33 performance domains. 34 const: 1 35 36required: 37 - compatible 38 - reg 39 - "#performance-domain-cells" 40 41additionalProperties: false 42 43examples: 44 - | 45 cpus { 46 #address-cells = <1>; 47 #size-cells = <0>; 48 49 cpu0: cpu@0 { 50 device_type = "cpu"; 51 compatible = "arm,cortex-a55"; 52 enable-method = "psci"; 53 performance-domains = <&performance 0>; 54 reg = <0x000>; 55 }; 56 }; 57 58 /* ... */ 59 60 soc { 61 #address-cells = <2>; 62 #size-cells = <2>; 63 64 performance: performance-controller@11bc00 { 65 compatible = "mediatek,cpufreq-hw"; 66 reg = <0 0x0011bc10 0 0x120>, <0 0x0011bd30 0 0x120>; 67 68 #performance-domain-cells = <1>; 69 }; 70 };