xref: /linux/Documentation/devicetree/bindings/pci/mediatek,mt7621-pcie.yaml (revision 4b132aacb0768ac1e652cf517097ea6f237214b9) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/pci/mediatek,mt7621-pcie.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: MediaTek MT7621 PCIe controller
8
9maintainers:
10  - Sergio Paracuellos <sergio.paracuellos@gmail.com>
11
12description: |+
13  MediaTek MT7621 PCIe subsys supports a single Root Complex (RC)
14  with 3 Root Ports. Each Root Port supports a Gen1 1-lane Link
15
16                          MT7621 PCIe HOST Topology
17
18                                   .-------.
19                                   |       |
20                                   |  CPU  |
21                                   |       |
22                                   '-------'
23                                       |
24                                       |
25                                       |
26                                       v
27                              .------------------.
28                  .-----------|  HOST/PCI Bridge |------------.
29                  |           '------------------'            | Type1
30             BUS0 |                     |                     | Access
31                  v                     v                     v On Bus0
32          .-------------.        .-------------.       .-------------.
33          | VIRTUAL P2P |        | VIRTUAL P2P |       | VIRTUAL P2P |
34          |    BUS0     |        |    BUS0     |       |    BUS0     |
35          |    DEV0     |        |    DEV1     |       |    DEV2     |
36          '-------------'        '-------------'       '-------------'
37    Type0        |          Type0       |         Type0       |
38   Access   BUS1 |         Access   BUS2|        Access   BUS3|
39   On Bus1       v         On Bus2      v        On Bus3      v
40           .----------.           .----------.          .----------.
41           | Device 0 |           | Device 0 |          | Device 0 |
42           |  Func 0  |           |  Func 0  |          |  Func 0  |
43           '----------'           '----------'          '----------'
44
45allOf:
46  - $ref: /schemas/pci/pci-host-bridge.yaml#
47
48properties:
49  compatible:
50    const: mediatek,mt7621-pci
51
52  reg:
53    items:
54      - description: host-pci bridge registers
55      - description: pcie port 0 RC control registers
56      - description: pcie port 1 RC control registers
57      - description: pcie port 2 RC control registers
58
59  ranges:
60    maxItems: 2
61
62patternProperties:
63  '^pcie@[0-2],0$':
64    type: object
65    $ref: /schemas/pci/pci-pci-bridge.yaml#
66
67    properties:
68      reg:
69        maxItems: 1
70
71      resets:
72        maxItems: 1
73
74      clocks:
75        maxItems: 1
76
77      phys:
78        maxItems: 1
79
80      phy-names:
81        pattern: '^pcie-phy[0-2]$'
82
83    required:
84      - "#interrupt-cells"
85      - interrupt-map-mask
86      - interrupt-map
87      - resets
88      - clocks
89      - phys
90      - phy-names
91      - ranges
92
93    unevaluatedProperties: false
94
95required:
96  - compatible
97  - reg
98  - ranges
99  - "#interrupt-cells"
100  - interrupt-map-mask
101  - interrupt-map
102  - reset-gpios
103
104unevaluatedProperties: false
105
106examples:
107  - |
108    #include <dt-bindings/gpio/gpio.h>
109    #include <dt-bindings/interrupt-controller/mips-gic.h>
110
111    pcie: pcie@1e140000 {
112        compatible = "mediatek,mt7621-pci";
113        reg = <0x1e140000 0x100>,
114              <0x1e142000 0x100>,
115              <0x1e143000 0x100>,
116              <0x1e144000 0x100>;
117
118        #address-cells = <3>;
119        #size-cells = <2>;
120        pinctrl-names = "default";
121        pinctrl-0 = <&pcie_pins>;
122        device_type = "pci";
123        ranges = <0x02000000 0 0x60000000 0x60000000 0 0x10000000>,  /* pci memory */
124                 <0x01000000 0 0x1e160000 0x1e160000 0 0x00010000>;  /* io space */
125        #interrupt-cells = <1>;
126        interrupt-map-mask = <0xF800 0 0 0>;
127        interrupt-map = <0x0000 0 0 0 &gic GIC_SHARED 4 IRQ_TYPE_LEVEL_HIGH>,
128                        <0x0800 0 0 0 &gic GIC_SHARED 24 IRQ_TYPE_LEVEL_HIGH>,
129                        <0x1000 0 0 0 &gic GIC_SHARED 25 IRQ_TYPE_LEVEL_HIGH>;
130        reset-gpios = <&gpio 19 GPIO_ACTIVE_LOW>;
131
132        pcie@0,0 {
133            reg = <0x0000 0 0 0 0>;
134            #address-cells = <3>;
135            #size-cells = <2>;
136            device_type = "pci";
137            #interrupt-cells = <1>;
138            interrupt-map-mask = <0 0 0 0>;
139            interrupt-map = <0 0 0 0 &gic GIC_SHARED 4 IRQ_TYPE_LEVEL_HIGH>;
140            resets = <&rstctrl 24>;
141            clocks = <&clkctrl 24>;
142            phys = <&pcie0_phy 1>;
143            phy-names = "pcie-phy0";
144            ranges;
145        };
146
147        pcie@1,0 {
148            reg = <0x0800 0 0 0 0>;
149            #address-cells = <3>;
150            #size-cells = <2>;
151            device_type = "pci";
152            #interrupt-cells = <1>;
153            interrupt-map-mask = <0 0 0 0>;
154            interrupt-map = <0 0 0 0 &gic GIC_SHARED 24 IRQ_TYPE_LEVEL_HIGH>;
155            resets = <&rstctrl 25>;
156            clocks = <&clkctrl 25>;
157            phys = <&pcie0_phy 1>;
158            phy-names = "pcie-phy1";
159            ranges;
160        };
161
162        pcie@2,0 {
163            reg = <0x1000 0 0 0 0>;
164            #address-cells = <3>;
165            #size-cells = <2>;
166            device_type = "pci";
167            #interrupt-cells = <1>;
168            interrupt-map-mask = <0 0 0 0>;
169            interrupt-map = <0 0 0 0 &gic GIC_SHARED 25 IRQ_TYPE_LEVEL_HIGH>;
170            resets = <&rstctrl 26>;
171            clocks = <&clkctrl 26>;
172            phys = <&pcie2_phy 0>;
173            phy-names = "pcie-phy2";
174            ranges;
175        };
176    };
177...
178