0001 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
0002 %YAML 1.2
0003 ---
0004 $id: http://devicetree.org/schemas/soc/mediatek/mtk-svs.yaml#
0005 $schema: http://devicetree.org/meta-schemas/core.yaml#
0006
0007 title: MediaTek Smart Voltage Scaling (SVS) Device Tree Bindings
0008
0009 maintainers:
0010 - Roger Lu <roger.lu@mediatek.com>
0011 - Matthias Brugger <matthias.bgg@gmail.com>
0012 - Kevin Hilman <khilman@kernel.org>
0013
0014 description: |+
0015 The SVS engine is a piece of hardware which has several
0016 controllers(banks) for calculating suitable voltage to
0017 different power domains(CPU/GPU/CCI) according to
0018 chip process corner, temperatures and other factors. Then DVFS
0019 driver could apply SVS bank voltage to PMIC/Buck.
0020
0021 properties:
0022 compatible:
0023 enum:
0024 - mediatek,mt8183-svs
0025 - mediatek,mt8192-svs
0026
0027 reg:
0028 maxItems: 1
0029 description: Address range of the MTK SVS controller.
0030
0031 interrupts:
0032 maxItems: 1
0033
0034 clocks:
0035 maxItems: 1
0036 description: Main clock for MTK SVS controller to work.
0037
0038 clock-names:
0039 const: main
0040
0041 nvmem-cells:
0042 minItems: 1
0043 description:
0044 Phandle to the calibration data provided by a nvmem device.
0045 items:
0046 - description: SVS efuse for SVS controller
0047 - description: Thermal efuse for SVS controller
0048
0049 nvmem-cell-names:
0050 items:
0051 - const: svs-calibration-data
0052 - const: t-calibration-data
0053
0054 resets:
0055 maxItems: 1
0056
0057 reset-names:
0058 items:
0059 - const: svs_rst
0060
0061 required:
0062 - compatible
0063 - reg
0064 - interrupts
0065 - clocks
0066 - clock-names
0067 - nvmem-cells
0068 - nvmem-cell-names
0069
0070 additionalProperties: false
0071
0072 examples:
0073 - |
0074 #include <dt-bindings/clock/mt8183-clk.h>
0075 #include <dt-bindings/interrupt-controller/arm-gic.h>
0076 #include <dt-bindings/interrupt-controller/irq.h>
0077
0078 soc {
0079 #address-cells = <2>;
0080 #size-cells = <2>;
0081
0082 svs@1100b000 {
0083 compatible = "mediatek,mt8183-svs";
0084 reg = <0 0x1100b000 0 0x1000>;
0085 interrupts = <GIC_SPI 127 IRQ_TYPE_LEVEL_LOW>;
0086 clocks = <&infracfg CLK_INFRA_THERM>;
0087 clock-names = "main";
0088 nvmem-cells = <&svs_calibration>, <&thermal_calibration>;
0089 nvmem-cell-names = "svs-calibration-data", "t-calibration-data";
0090 };
0091 };
