Merge common code between PowerPC and Microblaze. SPARC implements irq_of_parse_and_map(), but the implementation is different, so it does not use this code. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Michal Simek <monstr@monstr.eu> Cc: "David S. Miller" <davem@davemloft.net> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Jeremy Kerr <jeremy.kerr@canonical.com>tirimbino
Grant Likely
15 years ago
parent
b505ff5e72
commit
e387344499
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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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@ -0,0 +1,41 @@ |
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#ifndef __OF_IRQ_H |
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#define __OF_IRQ_H |
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#if defined(CONFIG_OF) |
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struct of_irq; |
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#include <linux/types.h> |
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#include <linux/of.h> |
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/*
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* irq_of_parse_and_map() is used ba all OF enabled platforms; but SPARC |
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* implements it differently. However, the prototype is the same for all, |
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* so declare it here regardless of the CONFIG_OF_IRQ setting. |
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*/ |
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extern unsigned int irq_of_parse_and_map(struct device_node *node, int index); |
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#if defined(CONFIG_OF_IRQ) |
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/**
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* of_irq - container for device_node/irq_specifier pair for an irq controller |
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* @controller: pointer to interrupt controller device tree node |
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* @size: size of interrupt specifier |
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* @specifier: array of cells @size long specifing the specific interrupt |
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* |
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* This structure is returned when an interrupt is mapped. The controller |
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* field needs to be put() after use |
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*/ |
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#define OF_MAX_IRQ_SPEC 4 /* We handle specifiers of at most 4 cells */ |
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struct of_irq { |
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struct device_node *controller; /* Interrupt controller node */ |
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u32 size; /* Specifier size */ |
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u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */ |
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}; |
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extern int of_irq_map_one(struct device_node *device, int index, |
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struct of_irq *out_irq); |
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extern unsigned int irq_create_of_mapping(struct device_node *controller, |
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const u32 *intspec, |
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unsigned int intsize); |
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#endif /* CONFIG_OF_IRQ */ |
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#endif /* CONFIG_OF */ |
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#endif /* __OF_IRQ_H */ |
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