/* * Copyright (C) 2012 Thomas Petazzoni * * Thomas Petazzoni <thomas.petazzoni@free-electrons.com> * * This file is licensed under the terms of the GNU General Public * License version 2. This program is licensed "as is" without any * warranty of any kind, whether express or implied. */ #include <linux/acpi.h> #include <linux/init.h> #include <linux/of_device.h> #include <linux/of_irq.h> #include <linux/irqchip.h> #include <linux/platform_device.h> /* * This special of_device_id is the sentinel at the end of the * of_device_id[] array of all irqchips. It is automatically placed at * the end of the array by the linker, thanks to being part of a * special section. */ static const struct of_device_id irqchip_of_match_end __used __section("__irqchip_of_table_end"); extern struct of_device_id __irqchip_of_table[]; void __init irqchip_init(void) { of_irq_init(__irqchip_of_table); acpi_probe_device_table(irqchip); } int platform_irqchip_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; struct device_node *par_np = of_irq_find_parent(np); of_irq_init_cb_t irq_init_cb = of_device_get_match_data(&pdev->dev); if (!irq_init_cb) { of_node_put(par_np); return -EINVAL; } if (par_np == np) par_np = NULL; /* * If there's a parent interrupt controller and none of the parent irq * domains have been registered, that means the parent interrupt * controller has not been initialized yet. it's not time for this * interrupt controller to initialize. So, defer probe of this * interrupt controller. The actual initialization callback of this * interrupt controller can check for specific domains as necessary. */ if (par_np && !irq_find_matching_host(par_np, DOMAIN_BUS_ANY)) { of_node_put(par_np); return -EPROBE_DEFER; } return irq_init_cb(np, par_np); } EXPORT_SYMBOL_GPL(platform_irqchip_probe);