On Mon, May 27, 2019 at 01:27:19PM +0200, Ard Biesheuvel wrote: > Expose the existing EXIU hierarchical irqchip domain code to permit > the interrupt controller to be used as the irqchip component of a > GPIO controller on ACPI systems, or as the target of ordinary > interrupt resources. > > Signed-off-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx> > --- > drivers/irqchip/irq-sni-exiu.c | 76 +++++++++++++++++--- > 1 file changed, 68 insertions(+), 8 deletions(-) > > diff --git a/drivers/irqchip/irq-sni-exiu.c b/drivers/irqchip/irq-sni-exiu.c > index fef7c2437dfb..30a323a2b332 100644 > --- a/drivers/irqchip/irq-sni-exiu.c > +++ b/drivers/irqchip/irq-sni-exiu.c > @@ -20,6 +20,7 @@ > #include <linux/of.h> > #include <linux/of_address.h> > #include <linux/of_irq.h> > +#include <linux/platform_device.h> > > #include <dt-bindings/interrupt-controller/arm-gic.h> > > @@ -134,9 +135,13 @@ static int exiu_domain_translate(struct irq_domain *domain, > > *hwirq = fwspec->param[1] - info->spi_base; > *type = fwspec->param[2] & IRQ_TYPE_SENSE_MASK; > - return 0; > + } else { > + if (fwspec->param_count != 2) > + return -EINVAL; > + *hwirq = fwspec->param[0]; > + *type = fwspec->param[2] & IRQ_TYPE_SENSE_MASK; > } > - return -EINVAL; > + return 0; > } > > static int exiu_domain_alloc(struct irq_domain *dom, unsigned int virq, > @@ -147,16 +152,21 @@ static int exiu_domain_alloc(struct irq_domain *dom, unsigned int virq, > struct exiu_irq_data *info = dom->host_data; > irq_hw_number_t hwirq; > > - if (fwspec->param_count != 3) > - return -EINVAL; /* Not GIC compliant */ > - if (fwspec->param[0] != GIC_SPI) > - return -EINVAL; /* No PPI should point to this domain */ > + parent_fwspec = *fwspec; > + if (is_of_node(dom->parent->fwnode)) { > + if (fwspec->param_count != 3) > + return -EINVAL; /* Not GIC compliant */ > + if (fwspec->param[0] != GIC_SPI) > + return -EINVAL; /* No PPI should point to this domain */ > > + hwirq = fwspec->param[1] - info->spi_base; > + } else { > + hwirq = fwspec->param[0]; > + parent_fwspec.param[0] = hwirq + info->spi_base + 32; > + } > WARN_ON(nr_irqs != 1); > - hwirq = fwspec->param[1] - info->spi_base; > irq_domain_set_hwirq_and_chip(dom, virq, hwirq, &exiu_irq_chip, info); > > - parent_fwspec = *fwspec; > parent_fwspec.fwnode = dom->parent->fwnode; > return irq_domain_alloc_irqs_parent(dom, virq, nr_irqs, &parent_fwspec); > } > @@ -245,3 +255,53 @@ static int __init exiu_dt_init(struct device_node *node, > return -ENOMEM; > } > IRQCHIP_DECLARE(exiu, "socionext,synquacer-exiu", exiu_dt_init); > + > +#ifdef CONFIG_ACPI > +static int exiu_acpi_probe(struct platform_device *pdev) > +{ > + struct irq_domain *domain; > + struct exiu_irq_data *data; > + struct resource *res; > + > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > + if (!res) { > + dev_err(&pdev->dev, "failed to parse memory resource\n"); > + return -ENXIO; > + } > + > + data = exiu_init(dev_fwnode(&pdev->dev), res); > + if (IS_ERR(data)) > + return PTR_ERR(data); > + > + domain = acpi_irq_create_hierarchy(0, NUM_IRQS, dev_fwnode(&pdev->dev), > + &exiu_domain_ops, data); > + if (!domain) { > + dev_err(&pdev->dev, "failed to create IRQ domain\n"); > + goto out_unmap; > + } > + > + dev_info(&pdev->dev, "%d interrupts forwarded\n", NUM_IRQS); Not sure how useful this message is for the end user. Maybe dev_dbg() instead. Regardless, Reviewed-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>