xref: /linux/Documentation/devicetree/bindings/phy/phy-cadence-sierra.yaml (revision 64b14a184e83eb62ea0615e31a409956049d40e7) 
1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: "http://devicetree.org/schemas/phy/phy-cadence-sierra.yaml#"
5$schema: "http://devicetree.org/meta-schemas/core.yaml#"
6
7title: Cadence Sierra PHY binding
8
9description:
10  This binding describes the Cadence Sierra PHY. Sierra PHY supports multilink
11  multiprotocol combinations including protocols such as PCIe, USB etc.
12
13maintainers:
14  - Swapnil Jakhade <sjakhade@cadence.com>
15  - Yuti Amonkar <yamonkar@cadence.com>
16
17properties:
18  compatible:
19    enum:
20      - cdns,sierra-phy-t0
21      - ti,sierra-phy-t0
22
23  '#address-cells':
24    const: 1
25
26  '#size-cells':
27    const: 0
28
29  '#clock-cells':
30    const: 1
31
32  resets:
33    minItems: 1
34    items:
35      - description: Sierra PHY reset.
36      - description: Sierra APB reset. This is optional.
37
38  reset-names:
39    minItems: 1
40    items:
41      - const: sierra_reset
42      - const: sierra_apb
43
44  reg:
45    maxItems: 1
46    description:
47      Offset of the Sierra PHY configuration registers.
48
49  reg-names:
50    const: serdes
51
52  clocks:
53    minItems: 2
54    maxItems: 4
55
56  clock-names:
57    minItems: 2
58    items:
59      - const: cmn_refclk_dig_div
60      - const: cmn_refclk1_dig_div
61      - const: pll0_refclk
62      - const: pll1_refclk
63
64  assigned-clocks:
65    minItems: 1
66    maxItems: 2
67
68  assigned-clock-parents:
69    minItems: 1
70    maxItems: 2
71
72  cdns,autoconf:
73    type: boolean
74    description:
75      A boolean property whose presence indicates that the PHY registers will be
76      configured by hardware. If not present, all sub-node optional properties
77      must be provided.
78
79patternProperties:
80  '^phy@[0-9a-f]$':
81    type: object
82    description:
83      Each group of PHY lanes with a single master lane should be represented as
84      a sub-node. Note that the actual configuration of each lane is determined
85      by hardware strapping, and must match the configuration specified here.
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: 15
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        enum: [2, 4]
108
109      cdns,num-lanes:
110        description:
111          Number of lanes in this group. The group is made up of consecutive lanes.
112        $ref: /schemas/types.yaml#/definitions/uint32
113        minimum: 1
114        maximum: 16
115
116      cdns,ssc-mode:
117        description:
118          Specifies the Spread Spectrum Clocking mode used. It can be NO_SSC,
119          EXTERNAL_SSC or INTERNAL_SSC.
120          Refer include/dt-bindings/phy/phy-cadence.h for the constants to be used.
121        $ref: /schemas/types.yaml#/definitions/uint32
122        enum: [0, 1, 2]
123        default: 1
124
125    required:
126      - reg
127      - resets
128      - "#phy-cells"
129
130    additionalProperties: false
131
132required:
133  - compatible
134  - "#address-cells"
135  - "#size-cells"
136  - reg
137  - resets
138  - reset-names
139
140additionalProperties: false
141
142examples:
143  - |
144    #include <dt-bindings/phy/phy.h>
145
146    bus {
147        #address-cells = <2>;
148        #size-cells = <2>;
149
150        sierra-phy@fd240000 {
151            compatible = "cdns,sierra-phy-t0";
152            reg = <0x0 0xfd240000 0x0 0x40000>;
153            resets = <&phyrst 0>, <&phyrst 1>;
154            reset-names = "sierra_reset", "sierra_apb";
155            clocks = <&cmn_refclk_dig_div>, <&cmn_refclk1_dig_div>;
156            clock-names = "cmn_refclk_dig_div", "cmn_refclk1_dig_div";
157            #address-cells = <1>;
158            #size-cells = <0>;
159            pcie0_phy0: phy@0 {
160                reg = <0>;
161                resets = <&phyrst 2>;
162                cdns,num-lanes = <2>;
163                #phy-cells = <0>;
164                cdns,phy-type = <PHY_TYPE_PCIE>;
165            };
166            pcie0_phy1: phy@2 {
167                reg = <2>;
168                resets = <&phyrst 4>;
169                cdns,num-lanes = <1>;
170                #phy-cells = <0>;
171                cdns,phy-type = <PHY_TYPE_PCIE>;
172            };
173        };
174    };
175