irqchip/exiu: Implement ACPI support (3d090a36) · Commits · 戴 / test

drivers/irqchip/irq-sni-exiu.c

+68 −8

Original line number	Diff line number	Diff line
		@@ -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 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;

		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 */

		WARN_ON(nr_irqs != 1);
		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);
		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 @@ out_unmap:
		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

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