linux-kernel - Re: [PATCH v3 1/2] dt-bindings: interrupt-controller: Add support for ASPEED AST27XX INTC

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Message-ID: <20241009211116.GA676770-robh@kernel.org>
Date: Wed, 9 Oct 2024 16:11:16 -0500
From: Rob Herring <robh@...nel.org>
To: Kevin Chen <kevin_chen@...eedtech.com>
Cc: tglx@...utronix.de, krzk+dt@...nel.org, conor+dt@...nel.org,
	joel@....id.au, andrew@...econstruct.com.au,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-aspeed@...ts.ozlabs.org
Subject: Re: [PATCH v3 1/2] dt-bindings: interrupt-controller: Add support
 for ASPEED AST27XX INTC

On Wed, Oct 09, 2024 at 07:58:12PM +0800, Kevin Chen wrote:
> The ASPEED AST27XX interrupt controller(INTC) contain second level and
> third level interrupt controller.
> 
> INTC0:
> The second level INTC, which used to assert GIC(#192~#197) if interrupt
> in INTC1 asserted. There are 6 GIC interrupt number(#192~#197) used in
> one INTC0.
> 
> INTC1_x:
> The third level INTC, which used to assert GIC(#192~#197) if interrupt in
> INTC1 asserted. There are 6 GIC interrupt number(#192~#197) used in one INTC0.
> 
> Signed-off-by: Kevin Chen <kevin_chen@...eedtech.com>
> ---
>  .../aspeed,ast2700-intc.yaml                  | 87 +++++++++++++++++++
>  1 file changed, 87 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/interrupt-controller/aspeed,ast2700-intc.yaml
> 
> diff --git a/Documentation/devicetree/bindings/interrupt-controller/aspeed,ast2700-intc.yaml b/Documentation/devicetree/bindings/interrupt-controller/aspeed,ast2700-intc.yaml
> new file mode 100644
> index 000000000000..650a1f6e1177
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/interrupt-controller/aspeed,ast2700-intc.yaml
> @@ -0,0 +1,87 @@
> +# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/interrupt-controller/aspeed,ast2700-intc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Aspeed AST2700 Interrupt Controller
> +
> +description:
> +  This interrupt controller hardware is second level interrupt controller that
> +  is hooked to a parent interrupt controller. It's useful to combine multiple
> +  interrupt sources into 1 interrupt to parent interrupt controller.
> +
> +maintainers:
> +  - Kevin Chen <kevin_chen@...eedtech.com>
> +
> +properties:
> +  compatible:
> +    enum:
> +      - aspeed,ast2700-intc-ic
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupt-controller: true
> +
> +  '#interrupt-cells':
> +    const: 2

Describe the meaning of the cells here.

> +
> +  interrupts:
> +    maxItems: 10
> +    description:

You need '|' to preserve formatting.

> +      Depend to which INTC0 or INTC1 used.
> +      INTC0 and INTC1 are two kinds of interrupt controller with enable and raw
> +      status registers for use.
> +      INTC0 is used to assert GIC if interrupt in INTC1 asserted.
> +      INTC1 is used to assert INTC0 if interrupt of modules asserted.
> +      +-----+   +-------+     +---------+---module0
> +      | GIC |---| INTC0 |--+--| INTC1_0 |---module2
> +      |     |   |       |  |  |         |---...
> +      +-----+   +-------+  |  +---------+---module31
> +                           |
> +                           |   +---------+---module0
> +                           +---| INTC1_1 |---module2
> +                           |   |         |---...
> +                           |   +---------+---module31
> +                          ...
> +                           |   +---------+---module0
> +                           +---| INTC1_5 |---module2
> +                               |         |---...
> +                               +---------+---module31
> +
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupt-controller
> +  - '#interrupt-cells'
> +  - interrupts
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +    bus {
> +        #address-cells = <2>;
> +        #size-cells = <2>;
> +
> +        interrupt-controller@...01b00 {
> +            compatible = "aspeed,ast2700-intc-ic";
> +            reg = <0 0x12101b00 0 0x10>;
> +            #interrupt-cells = <2>;
> +            interrupt-controller;
> +            interrupts = <GIC_SPI 192 IRQ_TYPE_LEVEL_HIGH>,
> +                         <GIC_SPI 193 IRQ_TYPE_LEVEL_HIGH>,
> +                         <GIC_SPI 194 IRQ_TYPE_LEVEL_HIGH>,
> +                         <GIC_SPI 195 IRQ_TYPE_LEVEL_HIGH>,
> +                         <GIC_SPI 196 IRQ_TYPE_LEVEL_HIGH>,
> +                         <GIC_SPI 197 IRQ_TYPE_LEVEL_HIGH>,
> +                         <GIC_SPI 198 IRQ_TYPE_LEVEL_HIGH>,
> +                         <GIC_SPI 199 IRQ_TYPE_LEVEL_HIGH>,
> +                         <GIC_SPI 200 IRQ_TYPE_LEVEL_HIGH>,
> +                         <GIC_SPI 201 IRQ_TYPE_LEVEL_HIGH>;
> +        };
> +    };
> -- 
> 2.34.1
>