1 TI SoC Ethernet Switch Controller Device Tree Bindings
2 ------------------------------------------------------
3
4 Required properties:
5 - compatible : Should be one of the below:-
6 "ti,cpsw" for backward compatible
7 "ti,am335x-cpsw" for AM335x controllers
8 "ti,am4372-cpsw" for AM437x controllers
9 "ti,dra7-cpsw" for DRA7x controllers
10 - reg : physical base address and size of the cpsw
11 registers map
12 - interrupts : property with a value describing the interrupt
13 number
14 - cpdma_channels : Specifies number of channels in CPDMA
15 - ale_entries : Specifies No of entries ALE can hold
16 - bd_ram_size : Specifies internal descriptor RAM size
17 - mac_control : Specifies Default MAC control register content
18 for the specific platform
19 - slaves : Specifies number for slaves
20 - active_slave : Specifies the slave to use for time stamping,
21 ethtool and SIOCGMIIPHY
22 - cpsw-phy-sel : Specifies the phandle to the CPSW phy mode selection
23 device. See also cpsw-phy-sel.txt for its binding.
24 Note that in legacy cases cpsw-phy-sel may be
25 a child device instead of a phandle
26 (DEPRECATED, use phys property instead).
27
28 Optional properties:
29 - ti,hwmods : Must be "cpgmac0"
30 - dual_emac : Specifies Switch to act as Dual EMAC
31 - syscon : Phandle to the system control device node, which is
32 the control module device of the am33x
33 - mode-gpios : Should be added if one/multiple gpio lines are
34 required to be driven so that cpsw data lines
35 can be connected to the phy via selective mux.
36 For example in dra72x-evm, pcf gpio has to be
37 driven low so that cpsw slave 0 and phy data
38 lines are connected via mux.
39 - cpts_clock_mult : Numerator to convert input clock ticks into nanoseconds
40 - cpts_clock_shift : Denominator to convert input clock ticks into nanoseconds
41 Mult and shift will be calculated basing on CPTS
42 rftclk frequency if both cpts_clock_shift and
43 cpts_clock_mult properties are not provided.
44
45 Slave Properties:
46 Required properties:
47 - phy-mode : See ethernet.txt file in the same directory
48 - phys : phandle on phy-gmii-sel PHY (see phy/ti-phy-gmii-sel.txt)
49
50 Optional properties:
51 - dual_emac_res_vlan : Specifies VID to be used to segregate the ports
52 - phy_id : Specifies slave phy id (deprecated, use phy-handle)
53 - phy-handle : See ethernet.txt file in the same directory
54
55 The MAC address will be determined using the optional properties
56 defined in ethernet.txt.
57
58 Slave sub-nodes:
59 - fixed-link : See fixed-link.txt file in the same directory
60
61 Note: Exactly one of phy_id, phy-handle, or fixed-link must be specified.
62
63 Note: "ti,hwmods" field is used to fetch the base address and irq
64 resources from TI, omap hwmod data base during device registration.
65 Future plan is to migrate hwmod data base contents into device tree
66 blob so that, all the required data will be used from device tree dts
67 file.
68
69 Examples:
70
71 mac: ethernet@4a100000 {
72 compatible = "ti,cpsw";
73 reg = <0x4A100000 0x1000>;
74 interrupts = <55 0x4>;
75 interrupt-parent = <&intc>;
76 cpdma_channels = <8>;
77 ale_entries = <1024>;
78 bd_ram_size = <0x2000>;
79 rx_descs = <64>;
80 mac_control = <0x20>;
81 slaves = <2>;
82 active_slave = <0>;
83 cpts_clock_mult = <0x80000000>;
84 cpts_clock_shift = <29>;
85 syscon = <&cm>;
86 cpsw-phy-sel = <&phy_sel>;
87 cpsw_emac0: slave@0 {
88 phy_id = <&davinci_mdio>, <0>;
89 phy-mode = "rgmii-txid";
90 /* Filled in by U-Boot */
91 mac-address = [ 00 00 00 00 00 00 ];
92 phys = <&phy_gmii_sel 1 0>;
93 };
94 cpsw_emac1: slave@1 {
95 phy_id = <&davinci_mdio>, <1>;
96 phy-mode = "rgmii-txid";
97 /* Filled in by U-Boot */
98 mac-address = [ 00 00 00 00 00 00 ];
99 phys = <&phy_gmii_sel 2 0>;
100 };
101 };
102
103 (or)
104 mac: ethernet@4a100000 {
105 compatible = "ti,cpsw";
106 ti,hwmods = "cpgmac0";
107 cpdma_channels = <8>;
108 ale_entries = <1024>;
109 bd_ram_size = <0x2000>;
110 rx_descs = <64>;
111 mac_control = <0x20>;
112 slaves = <2>;
113 active_slave = <0>;
114 cpts_clock_mult = <0x80000000>;
115 cpts_clock_shift = <29>;
116 syscon = <&cm>;
117 cpsw-phy-sel = <&phy_sel>;
118 cpsw_emac0: slave@0 {
119 phy_id = <&davinci_mdio>, <0>;
120 phy-mode = "rgmii-txid";
121 /* Filled in by U-Boot */
122 mac-address = [ 00 00 00 00 00 00 ];
123 phys = <&phy_gmii_sel 1 0>;
124 };
125 cpsw_emac1: slave@1 {
126 phy_id = <&davinci_mdio>, <1>;
127 phy-mode = "rgmii-txid";
128 /* Filled in by U-Boot */
129 mac-address = [ 00 00 00 00 00 00 ];
130 phys = <&phy_gmii_sel 2 0>;
131 };
132 };
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