xref: /linux/Documentation/devicetree/bindings/arm/sunxi/allwinner,sun4i-a10-mbus.yaml (revision 3d0fe49454652117522f60bfbefb978ba0e5300b) 
1# SPDX-License-Identifier: GPL-2.0
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/arm/sunxi/allwinner,sun4i-a10-mbus.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Allwinner Memory Bus (MBUS) controller
8
9maintainers:
10  - Chen-Yu Tsai <wens@csie.org>
11  - Maxime Ripard <mripard@kernel.org>
12
13description: |
14  The MBUS controller drives the MBUS that other devices in the SoC
15  will use to perform DMA. It also has a register interface that
16  allows to monitor and control the bandwidth and priorities for
17  masters on that bus.
18
19  Each device having to perform their DMA through the MBUS must have
20  the interconnects and interconnect-names properties set to the MBUS
21  controller and with "dma-mem" as the interconnect name.
22
23properties:
24  "#interconnect-cells":
25    const: 1
26    description:
27      The content of the cell is the MBUS ID.
28
29  compatible:
30    enum:
31      - allwinner,sun5i-a13-mbus
32      - allwinner,sun8i-a33-mbus
33      - allwinner,sun8i-a50-mbus
34      - allwinner,sun8i-a83t-mbus
35      - allwinner,sun8i-h3-mbus
36      - allwinner,sun8i-r40-mbus
37      - allwinner,sun8i-v3s-mbus
38      - allwinner,sun8i-v536-mbus
39      - allwinner,sun20i-d1-mbus
40      - allwinner,sun50i-a64-mbus
41      - allwinner,sun50i-a100-mbus
42      - allwinner,sun50i-h5-mbus
43      - allwinner,sun50i-h6-mbus
44      - allwinner,sun50i-h616-mbus
45      - allwinner,sun50i-r329-mbus
46
47  reg:
48    minItems: 1
49    items:
50      - description: MBUS interconnect/bandwidth limit/PMU registers
51      - description: DRAM controller/PHY registers
52
53  reg-names:
54    minItems: 1
55    items:
56      - const: mbus
57      - const: dram
58
59  clocks:
60    minItems: 1
61    items:
62      - description: MBUS interconnect module clock
63      - description: DRAM controller/PHY module clock
64      - description: Register bus clock, shared by MBUS and DRAM
65
66  clock-names:
67    minItems: 1
68    items:
69      - const: mbus
70      - const: dram
71      - const: bus
72
73  interrupts:
74    maxItems: 1
75    description:
76      MBUS PMU activity interrupt.
77
78  dma-ranges:
79    description:
80      See section 2.3.9 of the DeviceTree Specification.
81
82  '#address-cells': true
83
84  '#size-cells': true
85
86required:
87  - "#interconnect-cells"
88  - compatible
89  - reg
90  - clocks
91  - dma-ranges
92
93if:
94  not:
95    properties:
96      compatible:
97        contains:
98          enum:
99            - allwinner,sun5i-a13-mbus
100            - allwinner,sun8i-r40-mbus
101
102then:
103  properties:
104    reg:
105      minItems: 2
106
107    reg-names:
108      minItems: 2
109
110    clocks:
111      minItems: 3
112
113    clock-names:
114      minItems: 3
115
116  required:
117    - reg-names
118    - clock-names
119
120else:
121  properties:
122    reg:
123      maxItems: 1
124
125    reg-names:
126      maxItems: 1
127
128    clocks:
129      maxItems: 1
130
131    clock-names:
132      maxItems: 1
133
134additionalProperties: false
135
136examples:
137  - |
138    #include <dt-bindings/clock/sun50i-a64-ccu.h>
139    #include <dt-bindings/interrupt-controller/arm-gic.h>
140
141    dram-controller@1c01000 {
142        compatible = "allwinner,sun5i-a13-mbus";
143        reg = <0x01c01000 0x1000>;
144        clocks = <&ccu CLK_MBUS>;
145        #address-cells = <1>;
146        #size-cells = <1>;
147        dma-ranges = <0x00000000 0x40000000 0x20000000>;
148        #interconnect-cells = <1>;
149    };
150
151  - |
152    dram-controller@1c62000 {
153        compatible = "allwinner,sun50i-a64-mbus";
154        reg = <0x01c62000 0x1000>,
155              <0x01c63000 0x1000>;
156        reg-names = "mbus", "dram";
157        clocks = <&ccu CLK_MBUS>,
158                 <&ccu CLK_DRAM>,
159                 <&ccu CLK_BUS_DRAM>;
160        clock-names = "mbus", "dram", "bus";
161        interrupts = <GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>;
162        #address-cells = <1>;
163        #size-cells = <1>;
164        dma-ranges = <0x00000000 0x40000000 0xc0000000>;
165        #interconnect-cells = <1>;
166    };
167
168...
169