1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/soc/mediatek/mtk-svs.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: MediaTek Smart Voltage Scaling (SVS)
8
9 maintainers:
10 - Roger Lu <roger.lu@mediatek.com>
11 - Matthias Brugger <matthias.bgg@gmail.com>
12 - Kevin Hilman <khilman@kernel.org>
13
14 description: |+
15 The SVS engine is a piece of hardware which has several
16 controllers(banks) for calculating suitable voltage to
17 different power domains(CPU/GPU/CCI) according to
18 chip process corner, temperatures and other factors. Then DVFS
19 driver could apply SVS bank voltage to PMIC/Buck.
20
21 properties:
22 compatible:
23 enum:
24 - mediatek,mt8183-svs
25 - mediatek,mt8186-svs
26 - mediatek,mt8188-svs
27 - mediatek,mt8192-svs
28 - mediatek,mt8195-svs
29
30 reg:
31 maxItems: 1
32 description: Address range of the MTK SVS controller.
33
34 interrupts:
35 maxItems: 1
36
37 clocks:
38 maxItems: 1
39 description: Main clock for MTK SVS controller to work.
40
41 clock-names:
42 const: main
43
44 nvmem-cells:
45 minItems: 1
46 description:
47 Phandle to the calibration data provided by a nvmem device.
48 items:
49 - description: SVS efuse for SVS controller
50 - description: Thermal efuse for SVS controller
51
52 nvmem-cell-names:
53 items:
54 - const: svs-calibration-data
55 - const: t-calibration-data
56
57 resets:
58 maxItems: 1
59
60 reset-names:
61 items:
62 - const: svs_rst
63
64 required:
65 - compatible
66 - reg
67 - interrupts
68 - clocks
69 - clock-names
70 - nvmem-cells
71 - nvmem-cell-names
72
73 additionalProperties: false
74
75 examples:
76 - |
77 #include <dt-bindings/clock/mt8183-clk.h>
78 #include <dt-bindings/interrupt-controller/arm-gic.h>
79 #include <dt-bindings/interrupt-controller/irq.h>
80
81 soc {
82 #address-cells = <2>;
83 #size-cells = <2>;
84
85 svs@1100b000 {
86 compatible = "mediatek,mt8183-svs";
87 reg = <0 0x1100b000 0 0x1000>;
88 interrupts = <GIC_SPI 127 IRQ_TYPE_LEVEL_LOW>;
89 clocks = <&infracfg CLK_INFRA_THERM>;
90 clock-names = "main";
91 nvmem-cells = <&svs_calibration>, <&thermal_calibration>;
92 nvmem-cell-names = "svs-calibration-data", "t-calibration-data";
93 };
94 };
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