diff options
author | Grant Likely <grant.likely@secretlab.ca> | 2010-06-18 19:09:59 +0200 |
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committer | Grant Likely <grant.likely@secretlab.ca> | 2010-06-28 21:41:33 +0200 |
commit | e3873444990dd6f8a095d1f72b5ad45192f8c506 (patch) | |
tree | 9e9fbc43fd4ffde3ac7d41827e0ab9c5f98363f0 /drivers/of/irq.c | |
parent | of: kill struct of_device (diff) | |
download | linux-e3873444990dd6f8a095d1f72b5ad45192f8c506.tar.xz linux-e3873444990dd6f8a095d1f72b5ad45192f8c506.zip |
of/irq: Move irq_of_parse_and_map() to common code
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>
Diffstat (limited to 'drivers/of/irq.c')
-rw-r--r-- | drivers/of/irq.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/drivers/of/irq.c b/drivers/of/irq.c new file mode 100644 index 000000000000..9b3397c27096 --- /dev/null +++ b/drivers/of/irq.c @@ -0,0 +1,45 @@ +/* + * Derived from arch/i386/kernel/irq.c + * Copyright (C) 1992 Linus Torvalds + * Adapted from arch/i386 by Gary Thomas + * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) + * Updated and modified by Cort Dougan <cort@fsmlabs.com> + * Copyright (C) 1996-2001 Cort Dougan + * Adapted for Power Macintosh by Paul Mackerras + * Copyright (C) 1996 Paul Mackerras (paulus@cs.anu.edu.au) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + * This file contains the code used to make IRQ descriptions in the + * device tree to actual irq numbers on an interrupt controller + * driver. + */ + +#include <linux/errno.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_irq.h> +#include <linux/string.h> + +/** + * irq_of_parse_and_map - Parse and map an interrupt into linux virq space + * @device: Device node of the device whose interrupt is to be mapped + * @index: Index of the interrupt to map + * + * This function is a wrapper that chains of_irq_map_one() and + * irq_create_of_mapping() to make things easier to callers + */ +unsigned int irq_of_parse_and_map(struct device_node *dev, int index) +{ + struct of_irq oirq; + + if (of_irq_map_one(dev, index, &oirq)) + return NO_IRQ; + + return irq_create_of_mapping(oirq.controller, oirq.specifier, + oirq.size); +} +EXPORT_SYMBOL_GPL(irq_of_parse_and_map); |