| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 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 | }; |