We add DT bindings documentation for CLINT device. Signed-off-by: Anup Patel <anup.patel@xxxxxxx> Reviewed-by: Palmer Dabbelt <palmerdabbelt@xxxxxxxxxx> Tested-by: Emil Renner Berhing <kernel@xxxxxxxx> --- .../bindings/timer/sifive,clint.yaml | 58 +++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 Documentation/devicetree/bindings/timer/sifive,clint.yaml diff --git a/Documentation/devicetree/bindings/timer/sifive,clint.yaml b/Documentation/devicetree/bindings/timer/sifive,clint.yaml new file mode 100644 index 000000000000..8ad115611860 --- /dev/null +++ b/Documentation/devicetree/bindings/timer/sifive,clint.yaml @@ -0,0 +1,58 @@ +# 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@xxxxxxxxxxx> + - Anup Patel <anup.patel@xxxxxxx> + +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 + +properties: + compatible: + items: + - const: sifive,clint0 + - const: sifive,fu540-c000-clint + + description: + Should be "sifive,<chip>-clint" and "sifive,clint<version>". + Supported compatible strings are - + "sifive,fu540-c000-clint" for the SiFive CLINT v0 as integrated + onto the SiFive FU540 chip, and "sifive,clint0" for the SiFive + CLINT v0 IP block with no chip integration tweaks. + Please refer to sifive-blocks-ip-versioning.txt for details + + reg: + maxItems: 1 + + interrupts-extended: + minItems: 1 + +required: + - compatible + - reg + - interrupts-extended + +examples: + - | + clint@2000000 { + compatible = "sifive,clint0", "sifive,fu540-c000-clint"; + interrupts-extended = <&cpu1intc 3 &cpu1intc 7 + &cpu2intc 3 &cpu2intc 7 + &cpu3intc 3 &cpu3intc 7 + &cpu4intc 3 &cpu4intc 7>; + reg = <0x2000000 0x4000000>; + }; +... -- 2.25.1
