linux-toradex.git/include/linux/of_irq.h, branch v3.12.25

of: clean-up ifdefs in of_irq.h

2013-09-25T02:12:32+00:00

Much of of_irq.h is needlessly ifdef'ed. Clean this up and minimize the
amount ifdef'ed code. This fixes some  build warnings when CONFIG_OF
is not enabled (seen on i386 and x86_64):

include/linux/of_irq.h:82:7: warning: 'struct device_node' declared inside parameter list [enabled by default]
include/linux/of_irq.h:82:7: warning: its scope is only this definition or declaration, which is probably not what you want [enabled by default]
include/linux/of_irq.h:87:47: warning: 'struct device_node' declared inside parameter list [enabled by default]

Compile tested on i386, sparc and arm.

Reported-by: Randy Dunlap 
Cc: Grant Likely 
Signed-off-by: Rob Herring

of/irq: sparse fixes

2012-10-17T20:53:02+00:00

drivers/of/irq.c:195:57: warning: restricted __be32 degrades to integer
drivers/of/irq.c:196:51: warning: restricted __be32 degrades to integer
drivers/of/irq.c:199:57: warning: restricted __be32 degrades to integer
drivers/of/irq.c:201:58: warning: restricted __be32 degrades to integer
drivers/of/irq.c:470:37: warning: incorrect type in assignment (different modifiers)
drivers/of/irq.c:470:37:    expected int ( *[usertype] irq_init_cb )( ... )
drivers/of/irq.c:470:37:    got void const *const data
drivers/of/irq.c:96:5: error: symbol 'of_irq_map_raw' redeclared with different type (originally declared at include/linux/of_irq.h:61) - incompatible argument 2 (different base types)

drivers/of/of_pci_irq.c:91:40: warning: incorrect type in argument 2 (different base types)
drivers/of/of_pci_irq.c:91:40:    expected unsigned int const [usertype] *intspec
drivers/of/of_pci_irq.c:91:40:    got restricted __be32 *
drivers/of/of_pci_irq.c:91:53: warning: incorrect type in argument 4 (different base types)
drivers/of/of_pci_irq.c:91:53:    expected unsigned int const [usertype] *addr
drivers/of/of_pci_irq.c:91:53:    got restricted __be32 *

Signed-off-by: Kim Phillips 
Signed-off-by: Rob Herring

of/irq: Create stub for of_irq_find_parent when !CONFIG_OF

2012-09-20T10:32:30+00:00

of_irq_find_parent is a handy function to use outside the confines of
the Open Firmware subsystem. One such use-case is when the IRQ Domain
wishes to find an IRQ domain for a given device node. Currently it can
not take any notice of the 'interrupt-parent' property. Instead it
just uses the first IRQ controller as it climbs the Device Tree. If
we were to use this as a precursor the resultant controller is more
likely to be correct.

Acked-by: Rob Herring 
Acked-by: Linus Walleij 
Signed-off-by: Lee Jones

of/irq: add empty irq_of_parse_and_map() for non-dt builds

2012-04-17T22:37:22+00:00

Add a empty irq_of_parse_and_map() function that returns 0 for non-dt
builds and avoid having #ifdef CONFIG_OF around all calls to
irq_of_parse_and_map(). In addition to that, the irq_of_parse_and_map()
function declaration is made available only if CONFIG_OF_IRQ is defined,
which is the same config option that makes the irq_of_parse_and_map()
function definition available. While at it, fix a typo as well.

Changes since v1:
- Moved irq_of_parse_and_map() function declaration under CONFIG_OF_IRQ.
- Fix a minor typo in comments.

Suggested-by: Grant Likely 
Signed-off-by: Thomas Abraham 
Acked-by: Rob Herring 
[grant.likely: fix bug causing SPARC to break]
Signed-off-by: Grant Likely

irq_domain: Centralize definition of irq_dispose_mapping()

2012-02-26T23:48:06+00:00

Several architectures define their own empty irq_dispose_mapping().  Since
the irq_domain code is centralized now, there is little need to do so.  This
patch removes them and creates a new empty copy when !CONFIG_IRQ_DOMAIN is
selected.

The patch also means that IRQ_DOMAIN becomes selectable on all architectures.

Signed-off-by: Grant Likely 
Cc: Rob Herring 
Cc: "David S. Miller" 
Cc: Jonas Bonn 
Cc: sparclinux@vger.kernel.org
Cc: linux@lists.openrisc.net

of/irq: introduce of_irq_init

2011-10-31T13:03:22+00:00

of_irq_init will scan the devicetree for matching interrupt controller
nodes. Then it calls an initialization function for each found controller
in the proper order with parent nodes initialized before child nodes.

Based on initial pseudo code from Grant Likely.

Changes in v4:
- Drop unnecessary empty list check
- Be more verbose on errors
- Simplify "if (!desc) WARN_ON(1)" to "if (WARN_ON(!desc))"

Changes in v3:
- add missing kfree's found by Jamie
- Implement Grant's comments to simplify the init loop
- fix function comments

Changes in v2:
- Complete re-write of list searching code from Grant Likely

Signed-off-by: Rob Herring 
Reviewed-by: Jamie Iles 
Tested-by: Thomas Abraham 
Acked-by: Grant Likely

irq: add irq_domain translation infrastructure

2011-07-28T07:32:04+00:00

This patch adds irq_domain infrastructure for translating from
hardware irq numbers to linux irqs.  This is particularly important
for architectures adding device tree support because the current
implementation (excluding PowerPC and SPARC) cannot handle
translation for more than a single interrupt controller.  irq_domain
supports device tree translation for any number of interrupt
controllers.

This patch converts x86, Microblaze, ARM and MIPS to use irq_domain
for device tree irq translation.  x86 is untested beyond compiling it,
irq_domain is enabled for MIPS and Microblaze, but the old behaviour is
preserved until the core code is modified to actually register an
irq_domain yet.  On ARM it works and is required for much of the new
ARM device tree board support.

PowerPC has /not/ been converted to use this new infrastructure.  It
is still missing some features before it can replace the virq
infrastructure already in powerpc (see documentation on
irq_domain_map/unmap for details).  Followup patches will add the
missing pieces and migrate PowerPC to use irq_domain.

SPARC has its own method of managing interrupts from the device tree
and is unaffected by this change.

Acked-by: Ralf Baechle 
Signed-off-by: Grant Likely

of: Export of_irq_find_parent()

2011-04-20T07:01:19+00:00

We have platform code that needs to find a node's interrupt parent, so
export of_irq_find_parent() so we can use it.

Signed-off-by: Michael Ellerman 
Signed-off-by: Benjamin Herrenschmidt

of/irq: of_irq.c needs to include linux/irq.h

2010-10-21T17:34:55+00:00

It works on current architectures simply because asm/prom.h includes
it, but it broke when x86 turned on CONFIG_OF.

Signed-off-by: Grant Likely

of/irq: remove references to NO_IRQ in drivers/of/platform.c

2010-10-13T03:58:27+00:00

Instead of referencing NO_IRQ in platform.c, define some helper functions
in irq.c to call instead from platform.c.  Keep NO_IRQ usage local to
irq.c, and define NO_IRQ if not defined in headers.

Signed-off-by: Andres Salomon 
Signed-off-by: Grant Likely