xref: /linux/Documentation/devicetree/bindings/phy/phy-cadence-sierra.yaml (revision 1ac731c529cd4d6adbce134754b51ff7d822b145) 
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
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  cdns,autoconf:
65    type: boolean
66    description:
67      A boolean property whose presence indicates that the PHY registers will be
68      configured by hardware. If not present, all sub-node optional properties
69      must be provided.
70
71patternProperties:
72  '^phy@[0-9a-f]$':
73    type: object
74    description:
75      Each group of PHY lanes with a single master lane should be represented as
76      a sub-node. Note that the actual configuration of each lane is determined
77      by hardware strapping, and must match the configuration specified here.
78    properties:
79      reg:
80        description:
81          The master lane number. This is the lowest numbered lane in the lane group.
82        minimum: 0
83        maximum: 15
84
85      resets:
86        minItems: 1
87        maxItems: 4
88        description:
89          Contains list of resets, one per lane, to get all the link lanes out of reset.
90
91      "#phy-cells":
92        const: 0
93
94      cdns,phy-type:
95        description:
96          Specifies the type of PHY for which the group of PHY lanes is used.
97          Refer include/dt-bindings/phy/phy.h. Constants from the header should be used.
98        $ref: /schemas/types.yaml#/definitions/uint32
99        enum: [2, 4]
100
101      cdns,num-lanes:
102        description:
103          Number of lanes in this group. The group is made up of consecutive lanes.
104        $ref: /schemas/types.yaml#/definitions/uint32
105        minimum: 1
106        maximum: 16
107
108      cdns,ssc-mode:
109        description:
110          Specifies the Spread Spectrum Clocking mode used. It can be NO_SSC,
111          EXTERNAL_SSC or INTERNAL_SSC.
112          Refer include/dt-bindings/phy/phy-cadence.h for the constants to be used.
113        $ref: /schemas/types.yaml#/definitions/uint32
114        enum: [0, 1, 2]
115        default: 1
116
117    required:
118      - reg
119      - resets
120      - "#phy-cells"
121
122    additionalProperties: false
123
124required:
125  - compatible
126  - "#address-cells"
127  - "#size-cells"
128  - reg
129  - resets
130  - reset-names
131
132additionalProperties: false
133
134examples:
135  - |
136    #include <dt-bindings/phy/phy.h>
137
138    bus {
139        #address-cells = <2>;
140        #size-cells = <2>;
141
142        sierra-phy@fd240000 {
143            compatible = "cdns,sierra-phy-t0";
144            reg = <0x0 0xfd240000 0x0 0x40000>;
145            resets = <&phyrst 0>, <&phyrst 1>;
146            reset-names = "sierra_reset", "sierra_apb";
147            clocks = <&cmn_refclk_dig_div>, <&cmn_refclk1_dig_div>;
148            clock-names = "cmn_refclk_dig_div", "cmn_refclk1_dig_div";
149            #address-cells = <1>;
150            #size-cells = <0>;
151            pcie0_phy0: phy@0 {
152                reg = <0>;
153                resets = <&phyrst 2>;
154                cdns,num-lanes = <2>;
155                #phy-cells = <0>;
156                cdns,phy-type = <PHY_TYPE_PCIE>;
157            };
158            pcie0_phy1: phy@2 {
159                reg = <2>;
160                resets = <&phyrst 4>;
161                cdns,num-lanes = <1>;
162                #phy-cells = <0>;
163                cdns,phy-type = <PHY_TYPE_PCIE>;
164            };
165        };
166    };
167