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Diffstat (limited to 'Bindings/timer/sifive,clint.yaml')
-rw-r--r-- | Bindings/timer/sifive,clint.yaml | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/Bindings/timer/sifive,clint.yaml b/Bindings/timer/sifive,clint.yaml new file mode 100644 index 00000000000..e8be6c47036 --- /dev/null +++ b/Bindings/timer/sifive,clint.yaml @@ -0,0 +1,78 @@ +# 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 + - sifive,fu540-c000-clint # SiFive FU540 + - starfive,jh7100-clint # StarFive JH7100 + - starfive,jh7110-clint # StarFive JH7110 + - const: sifive,clint0 # SiFive CLINT v0 IP block + - items: + - enum: + - allwinner,sun20i-d1-clint + - sophgo,cv1800b-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 + +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>; + }; +... |