1 ZHAW InES PTP time stamping IP core 1 ZHAW InES PTP time stamping IP core
2 2
3 The IP core needs two different kinds of nodes 3 The IP core needs two different kinds of nodes. The control node
4 lives somewhere in the memory map and specifie 4 lives somewhere in the memory map and specifies the address of the
5 control registers. There can be up to three p 5 control registers. There can be up to three port handles placed as
6 attributes of PHY nodes. These associate a pa 6 attributes of PHY nodes. These associate a particular MII bus with a
7 port index within the IP core. 7 port index within the IP core.
8 8
9 Required properties of the control node: 9 Required properties of the control node:
10 10
11 - compatible: "ines,ptp-ctrl" 11 - compatible: "ines,ptp-ctrl"
12 - reg: physical address and s 12 - reg: physical address and size of the register bank
13 13
14 Required format of the port handle within the 14 Required format of the port handle within the PHY node:
15 15
16 - timestamper: provides control node 16 - timestamper: provides control node reference and
17 the port channel withi 17 the port channel within the IP core
18 18
19 Example: 19 Example:
20 20
21 tstamper: timestamper@60000000 { 21 tstamper: timestamper@60000000 {
22 compatible = "ines,ptp-ctrl"; 22 compatible = "ines,ptp-ctrl";
23 reg = <0x60000000 0x80>; 23 reg = <0x60000000 0x80>;
24 }; 24 };
25 25
26 ethernet@80000000 { 26 ethernet@80000000 {
27 ... 27 ...
28 mdio { 28 mdio {
29 ... 29 ...
30 ethernet-phy@3 { 30 ethernet-phy@3 {
31 ... 31 ...
32 timestamper = 32 timestamper = <&tstamper 0>;
33 }; 33 };
34 }; 34 };
35 }; 35 };
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