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of/irq: Move irq_of_parse_and_map() to common code

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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>
This commit is contained in:
Grant Likely 2010-06-18 11:09:59 -06:00
parent b505ff5e72
commit e387344499
13 changed files with 99 additions and 128 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
arch/microblaze/include/asm/irq.h
View File

@ -27,17 +27,6 @@ extern unsigned int nr_irq;
struct pt_regs;
extern void do_IRQ(struct pt_regs *regs);
/**
* 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
*/
struct device_node;
extern unsigned int irq_of_parse_and_map(struct device_node *dev, int index);
/** FIXME - not implement
* irq_dispose_mapping - Unmap an interrupt
* @virq: linux virq number of the interrupt to unmap
@ -62,17 +51,4 @@ struct irq_host;
extern unsigned int irq_create_mapping(struct irq_host *host,
irq_hw_number_t hwirq);
/**
* irq_create_of_mapping - Map a hardware interrupt into linux virq space
* @controller: Device node of the interrupt controller
* @inspec: Interrupt specifier from the device-tree
* @intsize: Size of the interrupt specifier from the device-tree
*
* This function is identical to irq_create_mapping except that it takes
* as input informations straight from the device-tree (typically the results
* of the of_irq_map_*() functions.
*/
extern unsigned int irq_create_of_mapping(struct device_node *controller,
u32 *intspec, unsigned int intsize);
#endif /* _ASM_MICROBLAZE_IRQ_H */

26
arch/microblaze/include/asm/prom.h
View File

@ -20,6 +20,7 @@
#ifndef __ASSEMBLY__
#include <linux/types.h>
#include <linux/of_irq.h>
#include <linux/of_fdt.h>
#include <linux/proc_fs.h>
#include <linux/platform_device.h>
@ -92,18 +93,6 @@ extern const void *of_get_mac_address(struct device_node *np);
* OF interrupt mapping
*/
/* This structure is returned when an interrupt is mapped. The controller
* field needs to be put() after use
*/
#define OF_MAX_IRQ_SPEC 4 /* We handle specifiers of at most 4 cells */
struct of_irq {
struct device_node *controller; /* Interrupt controller node */
u32 size; /* Specifier size */
u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
};
/**
* of_irq_map_init - Initialize the irq remapper
* @flags: flags defining workarounds to enable
@ -138,19 +127,6 @@ extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
u32 ointsize, const u32 *addr,
struct of_irq *out_irq);
/**
* of_irq_map_one - Resolve an interrupt for a device
* @device: the device whose interrupt is to be resolved
* @index: index of the interrupt to resolve
* @out_irq: structure of_irq filled by this function
*
* This function resolves an interrupt, walking the tree, for a given
* device-tree node. It's the high level pendant to of_irq_map_raw().
* It also implements the workarounds for OldWolrd Macs.
*/
extern int of_irq_map_one(struct device_node *device, int index,
struct of_irq *out_irq);
/**
* of_irq_map_pci - Resolve the interrupt for a PCI device
* @pdev: the device whose interrupt is to be resolved

14
arch/microblaze/kernel/irq.c
View File

@ -17,20 +17,10 @@
#include <linux/seq_file.h>
#include <linux/kernel_stat.h>
#include <linux/irq.h>
#include <linux/of_irq.h>
#include <asm/prom.h>
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 oirq.specifier[0];
}
EXPORT_SYMBOL_GPL(irq_of_parse_and_map);
static u32 concurrent_irq;
void __irq_entry do_IRQ(struct pt_regs *regs)
@ -104,7 +94,7 @@ unsigned int irq_create_mapping(struct irq_host *host, irq_hw_number_t hwirq)
EXPORT_SYMBOL_GPL(irq_create_mapping);
unsigned int irq_create_of_mapping(struct device_node *controller,
u32 *intspec, unsigned int intsize)
const u32 *intspec, unsigned int intsize)
{
return intspec[0];
}

28
arch/powerpc/include/asm/irq.h
View File

@ -300,34 +300,6 @@ extern unsigned int irq_alloc_virt(struct irq_host *host,
*/
extern void irq_free_virt(unsigned int virq, unsigned int count);
/* -- OF helpers -- */
/**
* irq_create_of_mapping - Map a hardware interrupt into linux virq space
* @controller: Device node of the interrupt controller
* @inspec: Interrupt specifier from the device-tree
* @intsize: Size of the interrupt specifier from the device-tree
*
* This function is identical to irq_create_mapping except that it takes
* as input informations straight from the device-tree (typically the results
* of the of_irq_map_*() functions.
*/
extern unsigned int irq_create_of_mapping(struct device_node *controller,
const u32 *intspec, unsigned int intsize);
/**
* 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
*/
extern unsigned int irq_of_parse_and_map(struct device_node *dev, int index);
/* -- End OF helpers -- */
/**
* irq_early_init - Init irq remapping subsystem
*/

27
arch/powerpc/include/asm/prom.h
View File

@ -18,6 +18,7 @@
*/
#include <linux/types.h>
#include <linux/of_fdt.h>
#include <linux/of_irq.h>
#include <linux/proc_fs.h>
#include <linux/platform_device.h>
#include <asm/irq.h>
@ -108,18 +109,6 @@ extern const void *of_get_mac_address(struct device_node *np);
* OF interrupt mapping
*/
/* This structure is returned when an interrupt is mapped. The controller
* field needs to be put() after use
*/
#define OF_MAX_IRQ_SPEC 4 /* We handle specifiers of at most 4 cells */
struct of_irq {
struct device_node *controller; /* Interrupt controller node */
u32 size; /* Specifier size */
u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
};
/**
* of_irq_map_init - Initialize the irq remapper
* @flags: flags defining workarounds to enable
@ -154,20 +143,6 @@ extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
u32 ointsize, const u32 *addr,
struct of_irq *out_irq);
/**
* of_irq_map_one - Resolve an interrupt for a device
* @device: the device whose interrupt is to be resolved
* @index: index of the interrupt to resolve
* @out_irq: structure of_irq filled by this function
*
* This function resolves an interrupt, walking the tree, for a given
* device-tree node. It's the high level pendant to of_irq_map_raw().
* It also implements the workarounds for OldWolrd Macs.
*/
extern int of_irq_map_one(struct device_node *device, int index,
struct of_irq *out_irq);
/**
* of_irq_map_pci - Resolve the interrupt for a PCI device
* @pdev: the device whose interrupt is to be resolved

14
arch/powerpc/kernel/irq.c
View File

@ -53,6 +53,8 @@
#include <linux/bootmem.h>
#include <linux/pci.h>
#include <linux/debugfs.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <asm/uaccess.h>
#include <asm/system.h>
@ -813,18 +815,6 @@ unsigned int irq_create_of_mapping(struct device_node *controller,
}
EXPORT_SYMBOL_GPL(irq_create_of_mapping);
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);
void irq_dispose_mapping(unsigned int virq)
{
struct irq_host *host;

1
arch/sparc/include/asm/prom.h
View File

@ -56,7 +56,6 @@ extern void of_fill_in_cpu_data(void);
* register them in the of_device objects, whereas powerpc computes them
* on request.
*/
extern unsigned int irq_of_parse_and_map(struct device_node *node, int index);
static inline void irq_dispose_mapping(unsigned int virq)
{
}

4
drivers/of/Kconfig
View File

@ -6,6 +6,10 @@ config OF_DYNAMIC
def_bool y
depends on OF && PPC_OF
config OF_IRQ
def_bool y
depends on OF && !SPARC
config OF_DEVICE
def_bool y
depends on OF && (SPARC || PPC_OF || MICROBLAZE)

1
drivers/of/Makefile
View File

@ -1,5 +1,6 @@
obj-y = base.o
obj-$(CONFIG_OF_FLATTREE) += fdt.o
obj-$(CONFIG_OF_IRQ) += irq.o
obj-$(CONFIG_OF_DEVICE) += device.o platform.o
obj-$(CONFIG_OF_GPIO) += gpio.o
obj-$(CONFIG_OF_I2C) += of_i2c.o

45
drivers/of/irq.c Normal file
View File

@ -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);

1
drivers/of/of_mdio.c
View File

@ -15,6 +15,7 @@
#include <linux/err.h>
#include <linux/phy.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/of_mdio.h>
#include <linux/module.h>

1
drivers/of/of_spi.c
View File

@ -9,6 +9,7 @@
#include <linux/of.h>
#include <linux/device.h>
#include <linux/spi/spi.h>
#include <linux/of_irq.h>
#include <linux/of_spi.h>
/**

41
include/linux/of_irq.h Normal file
View File

@ -0,0 +1,41 @@
#ifndef __OF_IRQ_H
#define __OF_IRQ_H
#if defined(CONFIG_OF)
struct of_irq;
#include <linux/types.h>
#include <linux/of.h>
/*
* irq_of_parse_and_map() is used ba all OF enabled platforms; but SPARC
* implements it differently. However, the prototype is the same for all,
* so declare it here regardless of the CONFIG_OF_IRQ setting.
*/
extern unsigned int irq_of_parse_and_map(struct device_node *node, int index);
#if defined(CONFIG_OF_IRQ)
/**
* of_irq - container for device_node/irq_specifier pair for an irq controller
* @controller: pointer to interrupt controller device tree node
* @size: size of interrupt specifier
* @specifier: array of cells @size long specifing the specific interrupt
*
* This structure is returned when an interrupt is mapped. The controller
* field needs to be put() after use
*/
#define OF_MAX_IRQ_SPEC 4 /* We handle specifiers of at most 4 cells */
struct of_irq {
struct device_node *controller; /* Interrupt controller node */
u32 size; /* Specifier size */
u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
};
extern int of_irq_map_one(struct device_node *device, int index,
struct of_irq *out_irq);
extern unsigned int irq_create_of_mapping(struct device_node *controller,
const u32 *intspec,
unsigned int intsize);
#endif /* CONFIG_OF_IRQ */
#endif /* CONFIG_OF */
#endif /* __OF_IRQ_H */