summaryrefslogtreecommitdiffstats
path: root/kernel/Documentation/devicetree/bindings/net/mdio-mux-gpio.txt
blob: 79384113c2b060a4068413d427d3509cdcaa2d5b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
Properties for an MDIO bus multiplexer/switch controlled by GPIO pins.

This is a special case of a MDIO bus multiplexer.  One or more GPIO
lines are used to control which child bus is connected.

Required properties in addition to the generic multiplexer properties:

- compatible : mdio-mux-gpio.
- gpios : GPIO specifiers for each GPIO line.  One or more must be specified.


Example :

	/* The parent MDIO bus. */
	smi1: mdio@1180000001900 {
		compatible = "cavium,octeon-3860-mdio";
		#address-cells = <1>;
		#size-cells = <0>;
		reg = <0x11800 0x00001900 0x0 0x40>;
	};

	/*
	   An NXP sn74cbtlv3253 dual 1-of-4 switch controlled by a
	   pair of GPIO lines.  Child busses 2 and 3 populated with 4
	   PHYs each.
	 */
	mdio-mux {
		compatible = "mdio-mux-gpio";
		gpios = <&gpio1 3 0>, <&gpio1 4 0>;
		mdio-parent-bus = <&smi1>;
		#address-cells = <1>;
		#size-cells = <0>;

		mdio@2 {
			reg = <2>;
			#address-cells = <1>;
			#size-cells = <0>;

			phy11: ethernet-phy@1 {
				reg = <1>;
				compatible = "marvell,88e1149r";
				marvell,reg-init = <3 0x10 0 0x5777>,
					<3 0x11 0 0x00aa>,
					<3 0x12 0 0x4105>,
					<3 0x13 0 0x0a60>;
				interrupt-parent = <&gpio>;
				interrupts = <10 8>; /* Pin 10, active low */
			};
			phy12: ethernet-phy@2 {
				reg = <2>;
				compatible = "marvell,88e1149r";
				marvell,reg-init = <3 0x10 0 0x5777>,
					<3 0x11 0 0x00aa>,
					<3 0x12 0 0x4105>,
					<3 0x13 0 0x0a60>;
				interrupt-parent = <&gpio>;
				interrupts = <10 8>; /* Pin 10, active low */
			};
			phy13: ethernet-phy@3 {
				reg = <3>;
				compatible = "marvell,88e1149r";
				marvell,reg-init = <3 0x10 0 0x5777>,
					<3 0x11 0 0x00aa>,
					<3 0x12 0 0x4105>,
					<3 0x13 0 0x0a60>;
				interrupt-parent = <&gpio>;
				interrupts = <10 8>; /* Pin 10, active low */
			};
			phy14: ethernet-phy@4 {
				reg = <4>;
				compatible = "marvell,88e1149r";
				marvell,reg-init = <3 0x10 0 0x5777>,
					<3 0x11 0 0x00aa>,
					<3 0x12 0 0x4105>,
					<3 0x13 0 0x0a60>;
				interrupt-parent = <&gpio>;
				interrupts = <10 8>; /* Pin 10, active low */
			};
		};

		mdio@3 {
			reg = <3>;
			#address-cells = <1>;
			#size-cells = <0>;

			phy21: ethernet-phy@1 {
				reg = <1>;
				compatible = "marvell,88e1149r";
				marvell,reg-init = <3 0x10 0 0x5777>,
					<3 0x11 0 0x00aa>,
					<3 0x12 0 0x4105>,
					<3 0x13 0 0x0a60>;
				interrupt-parent = <&gpio>;
				interrupts = <12 8>; /* Pin 12, active low */
			};
			phy22: ethernet-phy@2 {
				reg = <2>;
				compatible = "marvell,88e1149r";
				marvell,reg-init = <3 0x10 0 0x5777>,
					<3 0x11 0 0x00aa>,
					<3 0x12 0 0x4105>,
					<3 0x13 0 0x0a60>;
				interrupt-parent = <&gpio>;
				interrupts = <12 8>; /* Pin 12, active low */
			};
			phy23: ethernet-phy@3 {
				reg = <3>;
				compatible = "marvell,88e1149r";
				marvell,reg-init = <3 0x10 0 0x5777>,
					<3 0x11 0 0x00aa>,
					<3 0x12 0 0x4105>,
					<3 0x13 0 0x0a60>;
				interrupt-parent = <&gpio>;
				interrupts = <12 8>; /* Pin 12, active low */
			};
			phy24: ethernet-phy@4 {
				reg = <4>;
				compatible = "marvell,88e1149r";
				marvell,reg-init = <3 0x10 0 0x5777>,
					<3 0x11 0 0x00aa>,
					<3 0x12 0 0x4105>,
					<3 0x13 0 0x0a60>;
				interrupt-parent = <&gpio>;
				interrupts = <12 8>; /* Pin 12, active low */
			};
		};
	};