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Documentation / devicetree / bindings / net / cpsw.txt




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Based on kernel version 4.8. Page generated on 2016-10-06 23:13 EST.

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	- 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	- cpts_clock_mult	: Numerator to convert input clock ticks into nanoseconds
24	- cpts_clock_shift	: Denominator to convert input clock ticks into nanoseconds
25	
26	Optional properties:
27	- ti,hwmods		: Must be "cpgmac0"
28	- no_bd_ram		: Must be 0 or 1
29	- dual_emac		: Specifies Switch to act as Dual EMAC
30	- syscon		: Phandle to the system control device node, which is
31				  the control module device of the am33x
32	- mode-gpios		: Should be added if one/multiple gpio lines are
33				  required to be driven so that cpsw data lines
34				  can be connected to the phy via selective mux.
35				  For example in dra72x-evm, pcf gpio has to be
36				  driven low so that cpsw slave 0 and phy data
37				  lines are connected via mux.
38	
39	
40	Slave Properties:
41	Required properties:
42	- phy-mode		: See ethernet.txt file in the same directory
43	
44	Optional properties:
45	- dual_emac_res_vlan	: Specifies VID to be used to segregate the ports
46	- mac-address		: See ethernet.txt file in the same directory
47	- phy_id		: Specifies slave phy id (deprecated, use phy-handle)
48	- phy-handle		: See ethernet.txt file in the same directory
49	
50	Slave sub-nodes:
51	- fixed-link		: See fixed-link.txt file in the same directory
52	
53	Note: Exactly one of phy_id, phy-handle, or fixed-link must be specified.
54	
55	Note: "ti,hwmods" field is used to fetch the base address and irq
56	resources from TI, omap hwmod data base during device registration.
57	Future plan is to migrate hwmod data base contents into device tree
58	blob so that, all the required data will be used from device tree dts
59	file.
60	
61	Examples:
62	
63		mac: ethernet@4A100000 {
64			compatible = "ti,cpsw";
65			reg = <0x4A100000 0x1000>;
66			interrupts = <55 0x4>;
67			interrupt-parent = <&intc>;
68			cpdma_channels = <8>;
69			ale_entries = <1024>;
70			bd_ram_size = <0x2000>;
71			no_bd_ram = <0>;
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			no_bd_ram = <0>;
101			rx_descs = <64>;
102			mac_control = <0x20>;
103			slaves = <2>;
104			active_slave = <0>;
105			cpts_clock_mult = <0x80000000>;
106			cpts_clock_shift = <29>;
107			syscon = <&cm>;
108			cpsw_emac0: slave@0 {
109				phy_id = <&davinci_mdio>, <0>;
110				phy-mode = "rgmii-txid";
111				/* Filled in by U-Boot */
112				mac-address = [ 00 00 00 00 00 00 ];
113			};
114			cpsw_emac1: slave@1 {
115				phy_id = <&davinci_mdio>, <1>;
116				phy-mode = "rgmii-txid";
117				/* Filled in by U-Boot */
118				mac-address = [ 00 00 00 00 00 00 ];
119			};
120		};
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