linux-kernel - Re: [PATCH v3 1/5] dt-bindings: interrupt-controller: Add Renesas RZ/G2L Interrupt Controller

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Date:   Thu, 12 May 2022 18:58:49 +0100
From:   "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <maz@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Phil Edworthy <phil.edworthy@...esas.com>,
        Biju Das <biju.das.jz@...renesas.com>
Subject: Re: [PATCH v3 1/5] dt-bindings: interrupt-controller: Add Renesas
 RZ/G2L Interrupt Controller

Hi Geert,

Thank you for the review.

On Thu, May 12, 2022 at 7:43 AM Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
>
> Hi Prabhakar,
>
> On Wed, May 11, 2022 at 8:32 PM Lad Prabhakar
> <prabhakar.mahadev-lad.rj@...renesas.com> wrote:
> > Add DT bindings for the Renesas RZ/G2L Interrupt Controller.
> >
> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
>
> Thanks for the update!
>
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/interrupt-controller/renesas,rzg2l-irqc.yaml
> > @@ -0,0 +1,134 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/interrupt-controller/renesas,rzg2l-irqc.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Renesas RZ/G2L (and alike SoC's) Interrupt Controller (IA55)
> > +
> > +maintainers:
> > +  - Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> > +  - Geert Uytterhoeven <geert+renesas@...der.be>
> > +
> > +description: |
> > +  IA55 performs various interrupt controls including synchronization for the external
> > +  interrupts of NMI, IRQ, and GPIOINT and the interrupts of the built-in peripheral
> > +  interrupts output by each IP. And it notifies the interrupt to the GIC
> > +    - IRQ sense select for 8 external interrupts, mapped to 8 GIC SPI interrupts
> > +    - GPIO pins used as external interrupt input pins, mapped to 32 GIC SPI interrupts
> > +    - NMI edge select (NMI is not treated as NMI exception and supports fall edge and
> > +      stand-up edge detection interrupts)
> > +
> > +allOf:
> > +  - $ref: /schemas/interrupt-controller.yaml#
> > +
> > +properties:
> > +  compatible:
> > +    items:
> > +      - enum:
> > +          - renesas,r9a07g044-irqc    # RZ/G2L
> > +      - const: renesas,rzg2l-irqc
> > +
> > +  '#interrupt-cells':
> > +    description: The first cell should contain interrupt number and the second cell
> > +                 is used to specify the flag.
>
> The important part is still missing: which interrupt number (the general
> description mentions 3 types)?
> I believe the answer is "external interrupt number".
>
My bad will update to "The first cell should contain an external
interrupt number (IRQ0-7) and the second cell is used to specify the
flag."

Cheers,
Prabhakar

> > +    const: 2
> > +
> > +
>
> Double blank line.
>
> > +  '#address-cells':
> > +    const: 0
>
> Gr{oetje,eeting}s,
>
>                         Geert
>
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org
>
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                 -- Linus Torvalds