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/*
* 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.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);
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