Re: [PATCH 2/2] dt-bindings: rtc: add bindings for max313xx RTCs

[Alexandre Belloni]

On 21/10/2022 11:44:12+0000, Tilki, Ibrahim wrote:
> > > +  interrupt-names:
> > > +    description: |
> > > +      Name of the interrupt pin of the RTC used for IRQ. Not required for
> > > +      RTCs that only have single interrupt pin available. Some of the RTCs
> > > +      share interrupt pins with clock input/output pins.
> > > +    minItems: 1
> > > +    items:
> > > +      - enum: [INTA, INTB]
> > > +      - enum: [INTA, INTB]
> > > +
> > 
> > I don't think this is right, what this is doing is essentially pinmuxing
> > interrupts versus clocks. What happens if you want INTB but this goes
> > directly to a PMIC instead of the SoC?
> > It is not something you can express with your current bindings.
> > 
> 
> Why would a user want INTB when it is not connected to SoC?
> User can specify none, either one or both of the interrupt pins.
> I don't see what the problem here is.
> 

the interrupt pin may be connected to a PMIC that is able to start or
wake up the platform. In that case, the user would not have any
interrupt-names and your driver will fail to mux the interrupt on INTB.
Please fix.

-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com