blob: 3570f0a588c4b0f6ceb561ab15e287fc23b5ba5a [file] [log] [blame]
* Copyright (C) 2012 Thomas Petazzoni
* Thomas Petazzoni <>
* 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)
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)
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))
return irq_init_cb(np, par_np);