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 $schema: "http://devicetree.org/meta-schemas/core.yaml#"
6
7 title: Cadence Sierra PHY binding
8
9 description:
10 This binding describes the Cadence Sierra PHY. Sierra PHY supports multilink
11 multiprotocol combinations including protocols such as PCIe, USB etc.
12
13 maintainers:
14 - Swapnil Jakhade <sjakhade@cadence.com>
15 - Yuti Amonkar <yamonkar@cadence.com>
16
17 properties:
18 compatible:
19 enum:
20 - cdns,sierra-phy-t0
21 - ti,sierra-phy-t0
22
23 '#address-cells':
24 const: 1
25
26 '#size-cells':
27 const: 0
28
29 '#clock-cells':
30 const: 1
31
32 resets:
33 minItems: 1
34 items:
35 - description: Sierra PHY reset.
36 - description: Sierra APB reset. This is optional.
37
38 reset-names:
39 minItems: 1
40 items:
41 - const: sierra_reset
42 - const: sierra_apb
43
44 reg:
45 maxItems: 1
46 description:
47 Offset of the Sierra PHY configuration registers.
48
49 reg-names:
50 const: serdes
51
52 clocks:
53 minItems: 2
54 maxItems: 4
55
56 clock-names:
57 minItems: 2
58 items:
59 - const: cmn_refclk_dig_div
60 - const: cmn_refclk1_dig_div
61 - const: pll0_refclk
62 - const: pll1_refclk
63
64 assigned-clocks:
65 minItems: 1
66 maxItems: 2
67
68 assigned-clock-parents:
69 minItems: 1
70 maxItems: 2
71
72 cdns,autoconf:
73 type: boolean
74 description:
75 A boolean property whose presence indicates that the PHY registers will be
76 configured by hardware. If not present, all sub-node optional properties
77 must be provided.
78
79 patternProperties:
80 '^phy@[0-9a-f]$':
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
132 required:
133 - compatible
134 - "#address-cells"
135 - "#size-cells"
136 - reg
137 - resets
138 - reset-names
139
140 additionalProperties: false
141
142 examples:
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 };
Cache object: 5ba6b9b9fc5ca685051ed8385d8060f0
|