Hi Marc,
On Thu, Jan 17, 2019 at 11:22:59AM +0000, Marc Zyngier wrote:
> > -static int qpnpint_irq_domain_map(struct irq_domain *d,
> > - unsigned int virq,
> > - irq_hw_number_t hwirq)
> > -{
> > - struct spmi_pmic_arb *pmic_arb = d->host_data;
> >
> > +static void qpnpint_irq_domain_map(struct spmi_pmic_arb *pmic_arb,
> > + struct irq_domain *domain, unsigned int virq,
> > + irq_hw_number_t hwirq)
> > +{
> > dev_dbg(&pmic_arb->spmic->dev, "virq = %u, hwirq = %lu\n", virq, hwirq);
> >
> > - irq_set_chip_and_handler(virq, &pmic_arb_irqchip, handle_level_irq);
> > - irq_set_chip_data(virq, d->host_data);
> > - irq_set_noprobe(virq);
> > + irq_domain_set_info(domain, virq, hwirq, &pmic_arb_irqchip, pmic_arb,
> > + handle_level_irq, NULL, NULL);
>
> I understand you haven't changed the existing semantic here by always
> setting the handler to handle_level_irq. But is that guaranteed to
> always be the case? See below.
>
> > +}
> > +
> > +static int qpnpint_irq_domain_alloc(struct irq_domain *domain,
> > + unsigned int virq, unsigned int nr_irqs,
> > + void *data)
> > +{
> > + struct spmi_pmic_arb *pmic_arb = domain->host_data;
> > + struct irq_fwspec *fwspec = data;
> > + irq_hw_number_t hwirq;
> > + unsigned int type;
> > + int ret, i;
> > +
> > + ret = qpnpint_irq_domain_translate(domain, fwspec, &hwirq, &type);
>
> Here, you extract the trigger from DT.
>
> > + if (ret)
> > + return ret;
> > +
> > + for (i = 0; i < nr_irqs; i++)
> > + qpnpint_irq_domain_map(pmic_arb, domain, virq + i, hwirq + i);
>
> Shouldn't you propagate it into the mapping function so that the handler
> can be selected accordingly? Or does the interrupt controller convert
> edge signals to level somehow?
qpnpint_irq_set_type() calls irq_set_handler_locked() to set the hander
to be either handle_edge_irq() or handle_level_irq(). So the handler is
initially setup incorrectly in some cases, but then setup correctly (via
__irq_set_trigger) when __setup_irq() is called by
request_threaded_irq().
It looks like that this will cause problems with shared IRQs to work as
expected.
I can rework this code and get this fixed.
Brian
