linux-kernel - Re: [PATCH 1/7] dt-bindings: interrupt-controller: Add bcm2712 MSI-X DT bindings

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Date: Tue, 2 Jul 2024 12:58:17 +0300
From: Stanimir Varbanov <svarbanov@...e.de>
To: Florian Fainelli <florian.fainelli@...adcom.com>,
 Stanimir Varbanov <svarbanov@...e.de>, linux-kernel@...r.kernel.org,
 devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-rpi-kernel@...ts.infradead.org, linux-pci@...r.kernel.org,
 Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>
Cc: Thomas Gleixner <tglx@...utronix.de>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Jim Quinlan <jim2101024@...il.com>,
 Nicolas Saenz Julienne <nsaenz@...nel.org>,
 Bjorn Helgaas <bhelgaas@...gle.com>,
 Lorenzo Pieralisi <lpieralisi@...nel.org>, kw@...ux.com,
 Philipp Zabel <p.zabel@...gutronix.de>,
 Andrea della Porta <andrea.porta@...e.com>,
 Phil Elwell <phil@...pberrypi.com>, Jonathan Bell <jonathan@...pberrypi.com>
Subject: Re: [PATCH 1/7] dt-bindings: interrupt-controller: Add bcm2712 MSI-X
 DT bindings

Hi,

Thank you for the review!

On 6/26/24 14:35, Florian Fainelli wrote:
> 
> 
> On 26/06/2024 11:45, Stanimir Varbanov wrote:
>> Adds DT bindings for bcm2712 MSI-X interrupt peripheral controller.
>>
>> Signed-off-by: Stanimir Varbanov <svarbanov@...e.de>

<cut>

>> +description: >
>> +  This interrupt controller is used to provide intterupt vectors to the
>> +  generic interrupt controller (GIC) on bcm2712. It will be used as
>> +  external MSI-X controller for PCIe root complex.
>> +
>> +allOf:
>> +  - $ref: /schemas/interrupt-controller/msi-controller.yaml#
>> +
>> +properties:
>> +  compatible:
>> +    items:
>> +      - enum:
>> +          - "brcm,bcm2712-mip-intc"
>> +  reg:
>> +    maxItems: 1
>> +    description: >
>> +      Specifies the base physical address and size of the registers
>> +
>> +  interrupt-controller: true
>> +
>> +  "#interrupt-cells":
>> +    const: 2
> 
> Should we have some sort of an interrupt-map or interrupt-map-mask
> property that defines the "linkage" between the inputs and the outputs?
> This controller does not really sit at the top-level of the interrupt
> tree as it feeds the ARM GIC, unfortunately this is not captured at all,
> and it seems to require ad-hoc properties to establish the mapping, that
> does not seem ideal.

Thank you for the suggestion. I will consider it.

~Stan