linux-kernel - Re: [PATCH v6 2/3] dt-bindings: interrupt-controller: realtek,rtl-intc: require parents

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Message-ID: <4f5824cd-f0be-13cd-b2ed-2c5ec30954ac@linaro.org>
Date:   Fri, 23 Sep 2022 20:33:34 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Sander Vanheule <sander@...nheule.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <maz@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v6 2/3] dt-bindings: interrupt-controller:
 realtek,rtl-intc: require parents

On 19/09/2022 22:24, Sander Vanheule wrote:
> The interrupt router has 32 inputs, and up to 15 outputs connected to
> the MIPS CPU's interrupts. The way these are mapped to each other is
> runtime configurable. This controller can also mask individual interrupt
> sources, and has a status register to indicate pending interrupts. This
> means the controller is not transparent, and the use of "interrupt-map"
> inappropriate. Instead, a list of parent interrupts should be specified.
> 
> Two-part compatibles are introduced to be able to require "interrupts"
> for new devicetrees. For backward compatibility "interrupt-map" is still
> allowed on these new compatibles, but deprecated. The old compatible,
> with required "interrupt-map" and "#address-cells", is also deprecated.
> The relevant descriptions are added or extended to more clearly describe
> the functionality of this controller.
> 
> To prevent spurious changes to the binding when more SoCs are added,
> "allOf" is used with one "if", and the compatible enum only has one
> item.
> 
> The example is updated to provide a correct example for RTL8380 SoCs.
> 
> Signed-off-by: Sander Vanheule <sander@...nheule.net>
> ---
> Changes in v6:
> - Allow interrupt-map for backwards compatibility, but mark as
>   deprecated.
> - Update commit message to explain forward/backward compatibility
> - Drop Rob's Reviewed-by because of above changes

Please, still wait a bit. I'll leave it to Rob (who should come online
next week) for a review.

Best regards,
Krzysztof