# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id:
http://devicetree.org/schemas/timer/sifive,clint.yaml#
$schema:
http://devicetree.org/meta-schemas/core.yaml#
title: SiFive Core Local Interruptor
maintainers:
- Palmer Dabbelt <palmer@dabbelt.com>
- Anup Patel <anup.patel@wdc.com>
description:
SiFive (and other RISC-V) SOCs include an implementation of the SiFive
Core Local Interruptor (CLINT) for M-mode timer and M-mode inter-processor
interrupts. It directly connects to the timer and inter-processor interrupt
lines of various HARTs (or CPUs) so RISC-V per-HART (or per-CPU) local
interrupt controller is the parent interrupt controller for CLINT device.
The clock frequency of CLINT is specified via "timebase-frequency" DT
property of "/cpus" DT node. The "timebase-frequency" DT property is
described in Documentation/devicetree/bindings/riscv/cpus.yaml
T-Head C906/C910 CPU cores include an implementation of CLINT too, however
their implementation lacks a memory-mapped MTIME register, thus not
compatible with SiFive ones.
properties:
compatible:
oneOf:
- items:
- enum:
- canaan,k210-clint # Canaan Kendryte K210
- eswin,eic7700-clint # ESWIN EIC7700
- sifive,fu540-c000-clint # SiFive FU540
- spacemit,k1-clint # SpacemiT K1
- starfive,jh7100-clint # StarFive JH7100
- starfive,jh7110-clint # StarFive JH7110
- starfive,jh8100-clint # StarFive JH8100
- const: sifive,clint0 # SiFive CLINT v0 IP block
- items:
- {}
- const: sifive,clint2 # SiFive CLINT v2 IP block
description:
SiFive CLINT v2 is the HRT that supports the Zicntr. The control of sifive,clint2
differs from that of sifive,clint0, making them incompatible.
- items:
- enum:
- allwinner,sun20i-d1-clint
- sophgo,cv1800b-clint
- sophgo,cv1812h-clint
- sophgo,sg2002-clint
- thead,th1520-clint
- const: thead,c900-clint
- items:
- const: sifive,clint0
- const: riscv,clint0
deprecated: true
description: For the QEMU virt machine only
description:
Should be "<vendor>,<chip>-clint", followed by "sifive,clint<version>"
when compatible with a SiFive CLINT. Please refer to
sifive-blocks-ip-versioning.txt for details regarding the latter.
reg:
maxItems: 1
interrupts-extended:
minItems: 1
maxItems: 4095
sifive,fine-ctr-bits:
maximum: 15
description: The width in bits of the fine counter.
if:
properties:
compatible:
contains:
const: sifive,clint2
then:
required:
- sifive,fine-ctr-bits
else:
properties:
sifive,fine-ctr-bits: false
additionalProperties: false
required:
- compatible
- reg
- interrupts-extended
examples:
- |
timer@2000000 {
compatible = "sifive,fu540-c000-clint", "sifive,clint0";
interrupts-extended = <&cpu1intc 3>, <&cpu1intc 7>,
<&cpu2intc 3>, <&cpu2intc 7>,
<&cpu3intc 3>, <&cpu3intc 7>,
<&cpu4intc 3>, <&cpu4intc 7>;
reg = <0x2000000 0x10000>;
};
...
