Commit | Line | Data |
---|---|---|
ceca0e1c PM |
1 | ARM Versatile Express Serial Configuration Controller |
2 | ----------------------------------------------------- | |
3 | ||
4 | Test chips for ARM Versatile Express platform implement SCC (Serial | |
5 | Configuration Controller) interface, used to set initial conditions | |
6 | for the test chip. | |
7 | ||
8 | In some cases its registers are also mapped in normal address space | |
9 | and can be used to obtain runtime information about the chip internals | |
10 | (like silicon temperature sensors) and as interface to other subsystems | |
11 | like platform configuration control and power management. | |
12 | ||
13 | Required properties: | |
14 | ||
15 | - compatible value: "arm,vexpress-scc,<model>", "arm,vexpress-scc"; | |
16 | where <model> is the full tile model name (as used | |
17 | in the tile's Technical Reference Manual), | |
18 | eg. for Coretile Express A15x2 A7x3 (V2P-CA15_A7): | |
19 | compatible = "arm,vexpress-scc,v2p-ca15_a7", "arm,vexpress-scc"; | |
20 | ||
21 | Optional properties: | |
22 | ||
23 | - reg: when the SCC is memory mapped, physical address and size of the | |
24 | registers window | |
25 | - interrupts: when the SCC can generate a system-level interrupt | |
26 | ||
27 | Example: | |
28 | ||
29 | scc@7fff0000 { | |
30 | compatible = "arm,vexpress-scc,v2p-ca15_a7", "arm,vexpress-scc"; | |
31 | reg = <0 0x7fff0000 0 0x1000>; | |
32 | interrupts = <0 95 4>; | |
33 | }; |