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