linux-kernel - Re: [PATCH v4 1/3] dt-bindings: interrupt-controller: realtek,rtl-intc: require parents

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Date:   Mon, 7 Feb 2022 14:24:21 -0600
From:   Rob Herring <robh@...nel.org>
To:     Sander Vanheule <sander@...nheule.net>
Cc:     John Crispin <john@...ozen.org>, Marc Zyngier <maz@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        Rob Herring <robh+dt@...nel.org>,
        Bert Vermeulen <bert@...t.com>,
        Birger Koblitz <mail@...ger-koblitz.de>
Subject: Re: [PATCH v4 1/3] dt-bindings: interrupt-controller:
 realtek,rtl-intc: require parents

On Sun, 06 Feb 2022 17:41:51 +0100, 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. The relevant descriptions are extended or added to
> more clearly describe the functionality of this controller. The old
> compatible, with "interrupt-map" and "#address-cells", is deprecated.
> Interrupt specifiers for new compatibles will require two cells, to
> indicate the output selection.
> 
> 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 v4:
> - Indicate more clearly that the controller is not transparent.
> ---
>  .../realtek,rtl-intc.yaml                     | 82 ++++++++++++++-----
>  1 file changed, 62 insertions(+), 20 deletions(-)
> 

Reviewed-by: Rob Herring <robh@...nel.org>