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SubjectRe: [PATCH v9 1/3] dt-bindings: mmc: mtk-sd: extend interrupts and pinctrls properties
On Fri, 1 Apr 2022 at 11:22, Ulf Hansson <ulf.hansson@linaro.org> wrote:
>
> On Tue, 29 Mar 2022 at 05:29, Axe Yang <axe.yang@mediatek.com> wrote:
> >
> > Extend interrupts and pinctrls for SDIO wakeup interrupt feature.
> > This feature allow SDIO devices alarm asynchronous interrupt to host
> > even when host stop providing clock to SDIO card. An extra wakeup
> > interrupt and pinctrl states for SDIO DAT1 pin state switching are
> > required in this scenario.
> >
> > Signed-off-by: Axe Yang <axe.yang@mediatek.com>
> > ---
> > .../devicetree/bindings/mmc/mtk-sd.yaml | 17 ++++++++++++++++-
> > 1 file changed, 16 insertions(+), 1 deletion(-)
> >
> > diff --git a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
> > index 297ada03e3de..3872a6ce2867 100644
> > --- a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
> > +++ b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
> > @@ -69,12 +69,22 @@ properties:
> > - const: ahb_cg
> >
> > interrupts:
> > - maxItems: 1
> > + description:
> > + Should at least contain MSDC GIC interrupt. To support SDIO in-band wakeup, an extended
> > + interrupt is required and be configured as wakeup source irq.
>
> If I understand correctly, the extended interrupt (a GPIO irq) may not
> necessarily share the same interrupt parent as the primary device
> interrupt.
>
> Perhaps it's then better to extend this with "interrupts-extended"
> instead. See Documentation/devicetree/bindings/interrupt-controller/interrupts.txt.

One more thing, looks like using the "interrupt-names" property would
be good to use too. To easier distinguish the different irqs.

[...]

Kind regards
Uffe

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