Hi Prabhakar, On Fri, Apr 22, 2022 at 12:12 AM Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx> wrote: > Add DT bindings for the Renesas RZ/G2L Interrupt Controller. > > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx> Thanks for your patch! > --- /dev/null > +++ b/Documentation/devicetree/bindings/interrupt-controller/renesas,rzg2l-irqc.yaml > @@ -0,0 +1,131 @@ > +# 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@xxxxxxxxxxxxxx> > + - Geert Uytterhoeven <geert+renesas@xxxxxxxxx> > + > +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': > + const: 2 What is the meaning of the cells? IRQ number + flags, I assume? How are the numbers mapped, do you need a DT bindings header? Perhaps it would make sense to increase to 3 cells, so you can use one cell for the type (cfr. e.g. GIC_SPI), and the second for the plain index within the type? The rest LGTM, but I'm not an interrupt expert, so I'm curious in hearing Marc's opinion. Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx 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
