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