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SubjectRe: [PATCH v3 03/10] dt-bindings: interrupt-controller: Add Loongson IOINTC
Hi, Jiaxun,

On Sun, Jan 12, 2020 at 4:21 PM Jiaxun Yang <jiaxun.yang@flygoat.com> wrote:
>
> Document Loongson I/O Interrupt controller.
>
> Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
> Reviewed-by: Rob Herring <robh@kernel.org>
> ---
> .../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@flygoat.com>
> +
> +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
>

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