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1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2# Copyright (c) 2020 MediaTek Inc.
3%YAML 1.2
4---
5$id: http://devicetree.org/schemas/memory-controllers/mediatek,smi-larb.yaml#
6$schema: http://devicetree.org/meta-schemas/core.yaml#
7
8title: SMI (Smart Multimedia Interface) Local Arbiter
9
10maintainers:
11 - Yong Wu <yong.wu@mediatek.com>
12
13description: |
14 The hardware block diagram please check bindings/iommu/mediatek,iommu.yaml
15
16properties:
17 compatible:
18 oneOf:
19 - enum:
20 - mediatek,mt2701-smi-larb
21 - mediatek,mt2712-smi-larb
22 - mediatek,mt6779-smi-larb
23 - mediatek,mt6795-smi-larb
24 - mediatek,mt8167-smi-larb
25 - mediatek,mt8173-smi-larb
26 - mediatek,mt8183-smi-larb
27 - mediatek,mt8186-smi-larb
28 - mediatek,mt8188-smi-larb
29 - mediatek,mt8192-smi-larb
30 - mediatek,mt8195-smi-larb
31
32 - description: for mt7623
33 items:
34 - const: mediatek,mt7623-smi-larb
35 - const: mediatek,mt2701-smi-larb
36
37 reg:
38 maxItems: 1
39
40 clocks:
41 description: |
42 apb and smi are mandatory. gals(global async local sync) is optional.
43 minItems: 2
44 items:
45 - description: apb is Advanced Peripheral Bus clock, It's the clock for
46 setting the register.
47 - description: smi is the clock for transfer data and command.
48 - description: the clock for gals.
49
50 clock-names:
51 minItems: 2
52 maxItems: 3
53
54 power-domains:
55 maxItems: 1
56
57 mediatek,smi:
58 $ref: /schemas/types.yaml#/definitions/phandle
59 description: a phandle to the smi_common node.
60
61 mediatek,larb-id:
62 $ref: /schemas/types.yaml#/definitions/uint32
63 minimum: 0
64 maximum: 31
65 description: the hardware id of this larb. It's only required when this
66 hardward id is not consecutive from its M4U point of view.
67
68required:
69 - compatible
70 - reg
71 - clocks
72 - clock-names
73 - power-domains
74
75allOf:
76 - if: # HW has gals
77 properties:
78 compatible:
79 enum:
80 - mediatek,mt8183-smi-larb
81 - mediatek,mt8186-smi-larb
82 - mediatek,mt8188-smi-larb
83 - mediatek,mt8195-smi-larb
84
85 then:
86 properties:
87 clocks:
88 minItems: 2
89 maxItems: 3
90 clock-names:
91 minItems: 2
92 items:
93 - const: apb
94 - const: smi
95 - const: gals
96
97 else:
98 properties:
99 clocks:
100 minItems: 2
101 maxItems: 2
102 clock-names:
103 items:
104 - const: apb
105 - const: smi
106
107 - if:
108 properties:
109 compatible:
110 contains:
111 enum:
112 - mediatek,mt2701-smi-larb
113 - mediatek,mt2712-smi-larb
114 - mediatek,mt6779-smi-larb
115 - mediatek,mt8186-smi-larb
116 - mediatek,mt8188-smi-larb
117 - mediatek,mt8192-smi-larb
118 - mediatek,mt8195-smi-larb
119
120 then:
121 required:
122 - mediatek,larb-id
123
124additionalProperties: false
125
126examples:
127 - |+
128 #include <dt-bindings/clock/mt8173-clk.h>
129 #include <dt-bindings/power/mt8173-power.h>
130
131 larb1: larb@16010000 {
132 compatible = "mediatek,mt8173-smi-larb";
133 reg = <0x16010000 0x1000>;
134 mediatek,smi = <&smi_common>;
135 power-domains = <&scpsys MT8173_POWER_DOMAIN_VDEC>;
136 clocks = <&vdecsys CLK_VDEC_CKEN>,
137 <&vdecsys CLK_VDEC_LARB_CKEN>;
138 clock-names = "apb", "smi";
139 };