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Documentation / devicetree / bindings / net / cpsw.txt




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Based on kernel version 4.7.2. Page generated on 2016-08-22 22:42 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	- rx_descs		: Specifies number of Rx descriptors
19	- mac_control		: Specifies Default MAC control register content
20				  for the specific platform
21	- slaves		: Specifies number for slaves
22	- active_slave		: Specifies the slave to use for time stamping,
23				  ethtool and SIOCGMIIPHY
24	- cpts_clock_mult	: Numerator to convert input clock ticks into nanoseconds
25	- cpts_clock_shift	: Denominator to convert input clock ticks into nanoseconds
26	
27	Optional properties:
28	- ti,hwmods		: Must be "cpgmac0"
29	- no_bd_ram		: Must be 0 or 1
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	
40	
41	Slave Properties:
42	Required properties:
43	- phy-mode		: See ethernet.txt file in the same directory
44	
45	Optional 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	
51	Slave sub-nodes:
52	- fixed-link		: See fixed-link.txt file in the same directory
53	
54	Note: Exactly one of phy_id, phy-handle, or fixed-link must be specified.
55	
56	Note: "ti,hwmods" field is used to fetch the base address and irq
57	resources from TI, omap hwmod data base during device registration.
58	Future plan is to migrate hwmod data base contents into device tree
59	blob so that, all the required data will be used from device tree dts
60	file.
61	
62	Examples:
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			no_bd_ram = <0>;
73			rx_descs = <64>;
74			mac_control = <0x20>;
75			slaves = <2>;
76			active_slave = <0>;
77			cpts_clock_mult = <0x80000000>;
78			cpts_clock_shift = <29>;
79			syscon = <&cm>;
80			cpsw_emac0: slave@0 {
81				phy_id = <&davinci_mdio>, <0>;
82				phy-mode = "rgmii-txid";
83				/* Filled in by U-Boot */
84				mac-address = [ 00 00 00 00 00 00 ];
85			};
86			cpsw_emac1: slave@1 {
87				phy_id = <&davinci_mdio>, <1>;
88				phy-mode = "rgmii-txid";
89				/* Filled in by U-Boot */
90				mac-address = [ 00 00 00 00 00 00 ];
91			};
92		};
93	
94	(or)
95		mac: ethernet@4A100000 {
96			compatible = "ti,cpsw";
97			ti,hwmods = "cpgmac0";
98			cpdma_channels = <8>;
99			ale_entries = <1024>;
100			bd_ram_size = <0x2000>;
101			no_bd_ram = <0>;
102			rx_descs = <64>;
103			mac_control = <0x20>;
104			slaves = <2>;
105			active_slave = <0>;
106			cpts_clock_mult = <0x80000000>;
107			cpts_clock_shift = <29>;
108			syscon = <&cm>;
109			cpsw_emac0: slave@0 {
110				phy_id = <&davinci_mdio>, <0>;
111				phy-mode = "rgmii-txid";
112				/* Filled in by U-Boot */
113				mac-address = [ 00 00 00 00 00 00 ];
114			};
115			cpsw_emac1: slave@1 {
116				phy_id = <&davinci_mdio>, <1>;
117				phy-mode = "rgmii-txid";
118				/* Filled in by U-Boot */
119				mac-address = [ 00 00 00 00 00 00 ];
120			};
121		};
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