| Message ID | 20190527112720.2266-4-ard.biesheuvel@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | synquacer: implement ACPI gpio/interrupt support | expand |
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@linaro.org> > --- > 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@linux.intel.com>
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); + + return 0; + +out_unmap: + iounmap(data->base); + kfree(data); + return -ENOMEM; +} + +static const struct acpi_device_id exiu_acpi_ids[] = { + { "SCX0008" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(acpi, exiu_acpi_ids); + +static struct platform_driver exiu_driver = { + .driver = { + .name = "exiu", + .acpi_match_table = exiu_acpi_ids, + }, + .probe = exiu_acpi_probe, +}; +builtin_platform_driver(exiu_driver); +#endif
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@linaro.org> --- drivers/irqchip/irq-sni-exiu.c | 76 +++++++++++++++++--- 1 file changed, 68 insertions(+), 8 deletions(-)