mirror of https://gitee.com/openkylin/linux.git
46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
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/*
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* Derived from arch/i386/kernel/irq.c
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* Copyright (C) 1992 Linus Torvalds
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* Adapted from arch/i386 by Gary Thomas
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* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
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* Updated and modified by Cort Dougan <cort@fsmlabs.com>
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* Copyright (C) 1996-2001 Cort Dougan
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* Adapted for Power Macintosh by Paul Mackerras
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* Copyright (C) 1996 Paul Mackerras (paulus@cs.anu.edu.au)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* This file contains the code used to make IRQ descriptions in the
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* device tree to actual irq numbers on an interrupt controller
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* driver.
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*/
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#include <linux/errno.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_irq.h>
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#include <linux/string.h>
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/**
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* irq_of_parse_and_map - Parse and map an interrupt into linux virq space
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* @device: Device node of the device whose interrupt is to be mapped
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* @index: Index of the interrupt to map
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*
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* This function is a wrapper that chains of_irq_map_one() and
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* irq_create_of_mapping() to make things easier to callers
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*/
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unsigned int irq_of_parse_and_map(struct device_node *dev, int index)
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{
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struct of_irq oirq;
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if (of_irq_map_one(dev, index, &oirq))
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return NO_IRQ;
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return irq_create_of_mapping(oirq.controller, oirq.specifier,
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oirq.size);
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}
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EXPORT_SYMBOL_GPL(irq_of_parse_and_map);
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