xref: /linux/Documentation/devicetree/bindings/timer/sifive,clint.yaml (revision a1ff5a7d78a036d6c2178ee5acd6ba4946243800) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/timer/sifive,clint.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: SiFive Core Local Interruptor
8
9maintainers:
10  - Palmer Dabbelt <palmer@dabbelt.com>
11  - Anup Patel <anup.patel@wdc.com>
12
13description:
14  SiFive (and other RISC-V) SOCs include an implementation of the SiFive
15  Core Local Interruptor (CLINT) for M-mode timer and M-mode inter-processor
16  interrupts. It directly connects to the timer and inter-processor interrupt
17  lines of various HARTs (or CPUs) so RISC-V per-HART (or per-CPU) local
18  interrupt controller is the parent interrupt controller for CLINT device.
19  The clock frequency of CLINT is specified via "timebase-frequency" DT
20  property of "/cpus" DT node. The "timebase-frequency" DT property is
21  described in Documentation/devicetree/bindings/riscv/cpus.yaml
22
23  T-Head C906/C910 CPU cores include an implementation of CLINT too, however
24  their implementation lacks a memory-mapped MTIME register, thus not
25  compatible with SiFive ones.
26
27properties:
28  compatible:
29    oneOf:
30      - items:
31          - enum:
32              - canaan,k210-clint       # Canaan Kendryte K210
33              - sifive,fu540-c000-clint # SiFive FU540
34              - starfive,jh7100-clint   # StarFive JH7100
35              - starfive,jh7110-clint   # StarFive JH7110
36              - starfive,jh8100-clint   # StarFive JH8100
37          - const: sifive,clint0        # SiFive CLINT v0 IP block
38      - items:
39          - enum:
40              - allwinner,sun20i-d1-clint
41              - sophgo,cv1800b-clint
42              - sophgo,cv1812h-clint
43              - sophgo,sg2002-clint
44              - thead,th1520-clint
45          - const: thead,c900-clint
46      - items:
47          - const: sifive,clint0
48          - const: riscv,clint0
49        deprecated: true
50        description: For the QEMU virt machine only
51
52    description:
53      Should be "<vendor>,<chip>-clint", followed by "sifive,clint<version>"
54      when compatible with a SiFive CLINT.  Please refer to
55      sifive-blocks-ip-versioning.txt for details regarding the latter.
56
57  reg:
58    maxItems: 1
59
60  interrupts-extended:
61    minItems: 1
62    maxItems: 4095
63
64additionalProperties: false
65
66required:
67  - compatible
68  - reg
69  - interrupts-extended
70
71examples:
72  - |
73    timer@2000000 {
74      compatible = "sifive,fu540-c000-clint", "sifive,clint0";
75      interrupts-extended = <&cpu1intc 3>, <&cpu1intc 7>,
76                            <&cpu2intc 3>, <&cpu2intc 7>,
77                            <&cpu3intc 3>, <&cpu3intc 7>,
78                            <&cpu4intc 3>, <&cpu4intc 7>;
79       reg = <0x2000000 0x10000>;
80    };
81...
82