linux-kernel - Re: [PATCH v4 1/2] of: add J-Core interrupt controller bindings

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Message-ID: <20160727100504.GB12880@leverpostej>
Date:	Wed, 27 Jul 2016 11:05:05 +0100
From:	Mark Rutland <mark.rutland@....com>
To:	Rich Felker <dalias@...c.org>
Cc:	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-sh@...r.kernel.org, Jason Cooper <jason@...edaemon.net>,
	Marc Zyngier <marc.zyngier@....com>,
	Rob Herring <robh+dt@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH v4 1/2] of: add J-Core interrupt controller bindings

On Wed, Jul 27, 2016 at 05:35:09AM +0000, Rich Felker wrote:
> Signed-off-by: Rich Felker <dalias@...c.org>
> ---
>  .../bindings/interrupt-controller/jcore,aic.txt    | 26 ++++++++++++++++++++++
>  1 file changed, 26 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/interrupt-controller/jcore,aic.txt
> 
> diff --git a/Documentation/devicetree/bindings/interrupt-controller/jcore,aic.txt b/Documentation/devicetree/bindings/interrupt-controller/jcore,aic.txt
> new file mode 100644
> index 0000000..b7a56ad
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/interrupt-controller/jcore,aic.txt
> @@ -0,0 +1,26 @@
> +J-Core Advanced Interrupt Controller
> +
> +Required properties:
> +
> +- compatible: Should be "jcore,aic1" for the (obsolete) first-generation aic
> +  with 8 interrupt lines with programmable priorities, or "jcore,aic2" for
> +  the "aic2" core with 64 interrupts.
> +
> +- reg: Memory region(s) for configuration. For SMP, there should be one
> +  region per cpu, indexed by the sequential, zero-based hardware cpu
> +  number (which is also the logical cpu number).

Nit: remove the bit about the logical number. That's a linux detail that
doesn't belong in the binding.

> +- interrupt-controller: Identifies the node as an interrupt controller
> +
> +- #interrupt-cells: Specifies the number of cells needed to encode an
> +  interrupt source. The value shall be 1.

... where the value encoded in that cell is?

I guess it's the zero-based index of the interrupt?

No flags? Can the AIC only do one trigger type?

Thanks,
Mark.