1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: "http://devicetree.org/schemas/phy/phy-cadence-torrent.yaml#"
5$schema: "http://devicetree.org/meta-schemas/core.yaml#"
6
7title: Cadence Torrent SD0801 PHY binding
8
9description:
10  This binding describes the Cadence SD0801 PHY (also known as Torrent PHY)
11  hardware included with the Cadence MHDP DisplayPort controller. Torrent
12  PHY also supports multilink multiprotocol combinations including protocols
13  such as PCIe, USB, SGMII, QSGMII etc.
14
15maintainers:
16  - Swapnil Jakhade <sjakhade@cadence.com>
17  - Yuti Amonkar <yamonkar@cadence.com>
18
19properties:
20  compatible:
21    enum:
22      - cdns,torrent-phy
23      - ti,j721e-serdes-10g
24
25  '#address-cells':
26    const: 1
27
28  '#size-cells':
29    const: 0
30
31  '#clock-cells':
32    const: 1
33
34  clocks:
35    minItems: 1
36    maxItems: 2
37    description:
38      PHY reference clock for 1 item. Must contain an entry in clock-names.
39      Optional Parent to enable output reference clock.
40
41  clock-names:
42    minItems: 1
43    items:
44      - const: refclk
45      - const: phy_en_refclk
46
47  assigned-clocks:
48    maxItems: 3
49
50  assigned-clock-parents:
51    maxItems: 3
52
53  reg:
54    minItems: 1
55    maxItems: 2
56    items:
57      - description: Offset of the Torrent PHY configuration registers.
58      - description: Offset of the DPTX PHY configuration registers.
59
60  reg-names:
61    minItems: 1
62    maxItems: 2
63    items:
64      - const: torrent_phy
65      - const: dptx_phy
66
67  resets:
68    minItems: 1
69    maxItems: 2
70    items:
71      - description: Torrent PHY reset.
72      - description: Torrent APB reset. This is optional.
73
74  reset-names:
75    minItems: 1
76    maxItems: 2
77    items:
78      - const: torrent_reset
79      - const: torrent_apb
80
81patternProperties:
82  '^phy@[0-3]$':
83    type: object
84    description:
85      Each group of PHY lanes with a single master lane should be represented as a sub-node.
86    properties:
87      reg:
88        description:
89          The master lane number. This is the lowest numbered lane in the lane group.
90        minimum: 0
91        maximum: 3
92
93      resets:
94        minItems: 1
95        maxItems: 4
96        description:
97          Contains list of resets, one per lane, to get all the link lanes out of reset.
98
99      "#phy-cells":
100        const: 0
101
102      cdns,phy-type:
103        description:
104          Specifies the type of PHY for which the group of PHY lanes is used.
105          Refer include/dt-bindings/phy/phy.h. Constants from the header should be used.
106        $ref: /schemas/types.yaml#/definitions/uint32
107        minimum: 1
108        maximum: 9
109
110      cdns,num-lanes:
111        description:
112          Number of lanes.
113        $ref: /schemas/types.yaml#/definitions/uint32
114        enum: [1, 2, 3, 4]
115        default: 4
116
117      cdns,ssc-mode:
118        description:
119          Specifies the Spread Spectrum Clocking mode used. It can be NO_SSC,
120          EXTERNAL_SSC or INTERNAL_SSC.
121          Refer include/dt-bindings/phy/phy-cadence-torrent.h for the constants to be used.
122        $ref: /schemas/types.yaml#/definitions/uint32
123        enum: [0, 1, 2]
124        default: 0
125
126      cdns,max-bit-rate:
127        description:
128          Maximum DisplayPort link bit rate to use, in Mbps
129        $ref: /schemas/types.yaml#/definitions/uint32
130        enum: [2160, 2430, 2700, 3240, 4320, 5400, 8100]
131        default: 8100
132
133    required:
134      - reg
135      - resets
136      - "#phy-cells"
137      - cdns,phy-type
138      - cdns,num-lanes
139
140    additionalProperties: false
141
142required:
143  - compatible
144  - "#address-cells"
145  - "#size-cells"
146  - clocks
147  - clock-names
148  - reg
149  - reg-names
150  - resets
151  - reset-names
152
153additionalProperties: false
154
155examples:
156  - |
157    #include <dt-bindings/phy/phy.h>
158
159    bus {
160        #address-cells = <2>;
161        #size-cells = <2>;
162
163        torrent-phy@f0fb500000 {
164            compatible = "cdns,torrent-phy";
165            reg = <0xf0 0xfb500000 0x0 0x00100000>,
166                  <0xf0 0xfb030a00 0x0 0x00000040>;
167            reg-names = "torrent_phy", "dptx_phy";
168            resets = <&phyrst 0>;
169            reset-names = "torrent_reset";
170            clocks = <&ref_clk>;
171            clock-names = "refclk";
172            #address-cells = <1>;
173            #size-cells = <0>;
174            phy@0 {
175                reg = <0>;
176                resets = <&phyrst 1>, <&phyrst 2>,
177                         <&phyrst 3>, <&phyrst 4>;
178                #phy-cells = <0>;
179                cdns,phy-type = <PHY_TYPE_DP>;
180                cdns,num-lanes = <4>;
181                cdns,max-bit-rate = <8100>;
182            };
183        };
184    };
185  - |
186    #include <dt-bindings/phy/phy.h>
187    #include <dt-bindings/phy/phy-cadence.h>
188
189    bus {
190        #address-cells = <2>;
191        #size-cells = <2>;
192
193        torrent-phy@f0fb500000 {
194            compatible = "cdns,torrent-phy";
195            reg = <0xf0 0xfb500000 0x0 0x00100000>;
196            reg-names = "torrent_phy";
197            resets = <&phyrst 0>, <&phyrst 1>;
198            reset-names = "torrent_reset", "torrent_apb";
199            clocks = <&ref_clk>;
200            clock-names = "refclk";
201            #address-cells = <1>;
202            #size-cells = <0>;
203            phy@0 {
204                reg = <0>;
205                resets = <&phyrst 2>, <&phyrst 3>;
206                #phy-cells = <0>;
207                cdns,phy-type = <PHY_TYPE_PCIE>;
208                cdns,num-lanes = <2>;
209                cdns,ssc-mode = <TORRENT_SERDES_NO_SSC>;
210            };
211
212            phy@2 {
213                reg = <2>;
214                resets = <&phyrst 4>;
215                #phy-cells = <0>;
216                cdns,phy-type = <PHY_TYPE_SGMII>;
217                cdns,num-lanes = <1>;
218                cdns,ssc-mode = <TORRENT_SERDES_NO_SSC>;
219            };
220        };
221    };
222...
223