xref: /linux/Documentation/devicetree/bindings/soc/mediatek/mtk-svs.yaml (revision 6e7fd890f1d6ac83805409e9c346240de2705584) 
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
7title: MediaTek Smart Voltage Scaling (SVS)
8
9maintainers:
10  - Roger Lu <roger.lu@mediatek.com>
11  - Matthias Brugger <matthias.bgg@gmail.com>
12  - Kevin Hilman <khilman@kernel.org>
13
14description: |+
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
21properties:
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
64required:
65  - compatible
66  - reg
67  - interrupts
68  - clocks
69  - clock-names
70  - nvmem-cells
71  - nvmem-cell-names
72
73additionalProperties: false
74
75examples:
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    };
95