Hi, Jiaxun, On Sun, Jan 12, 2020 at 4:21 PM Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx> wrote: > > Document Loongson I/O Interrupt controller. > > Signed-off-by: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx> > Reviewed-by: Rob Herring <robh@xxxxxxxxxx> > --- > .../interrupt-controller/loongson,iointc.yaml | 92 +++++++++++++++++++ > 1 file changed, 92 insertions(+) > create mode 100644 Documentation/devicetree/bindings/interrupt-controller/loongson,iointc.yaml > > diff --git a/Documentation/devicetree/bindings/interrupt-controller/loongson,iointc.yaml b/Documentation/devicetree/bindings/interrupt-controller/loongson,iointc.yaml > new file mode 100644 > index 000000000000..b0fe6c551362 > --- /dev/null > +++ b/Documentation/devicetree/bindings/interrupt-controller/loongson,iointc.yaml > @@ -0,0 +1,92 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: "http://devicetree.org/schemas/interrupt-controller/loongson,iointc.yaml#"; > +$schema: "http://devicetree.org/meta-schemas/core.yaml#"; > + > +title: Loongson I/O Interrupt Controller > + > +maintainers: > + - Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx> > + > +description: | > + This interrupt controller is found in the Loongson-3 family of chips as the primary > + package interrupt source which can route interrupt to interrupt line of cores. > + > +allOf: > + - $ref: /schemas/interrupt-controller.yaml# > + > +properties: > + compatible: > + oneOf: > + - const: loongson,iointc-1.0 > + - const: loongson,iointc-1.0a As our early discussion, we should use liointc for the legacy Loongson irq-controller ans use eiointc for the new irq-controller in Loongson-3A4000. Moreover, could you please describe the difference between 1.0 and 1.0a? Huacai > + > + reg: > + maxItems: 1 > + > + interrupt-controller: true > + > + interrupts: > + description: > + Interrupt source of the CPU interrupts. > + minItems: 1 > + maxItems: 4 > + > + interrupt-names: > + description: List of names for the parent interrupts. > + oneOf: > + - items: > + - const: int0 > + - const: int1 > + - const: int2 > + - const: int3 > + minItems: 1 > + maxItems: 4 > + > + '#interrupt-cells': > + const: 2 > + > + 'loongson,parent_int_map': > + description: | > + This property points the accept range of children interrupts > + that parents will recieve. Each cell refers to a parent interrupt line > + and each bit in the cell refers to a children interrupt. If a parent > + did not connected, than keep it's cell with zero. > + allOf: > + - $ref: /schemas/types.yaml#/definitions/uint32-array > + - items: > + minItems: 4 > + maxItems: 4 > + > + > +required: > + - compatible > + - reg > + - interrupts > + - interrupt-controller > + - '#interrupt-cells' > + - 'loongson,parent_int_map' > + > + > +examples: > + - | > + iointc: interrupt-controller@3ff01400 { > + compatible = "loongson,iointc-1.0"; > + reg = <0 0x3ff01400 0x64>; > + > + interrupt-controller; > + #interrupt-cells = <2>; > + > + interrupt-parent = <&cpuintc>; > + interrupts = <2>, <3>; > + interrupt-names = "int0", "int1"; > + > + loongson,parent_int_map = <0xf0ffffff>, /* int0 */ > + <0x0f000000>, /* int1 */ > + <0x00000000>, /* int2 */ > + <0x00000000>; /* int3 */ > + > + }; > + > +... > -- > 2.24.1 >
