kernel/linux.git/drivers/of/irq.c, branch v3.4.52

of/irq: Add interrupts-names property to name an irq resource

2012-01-04T07:33:15+00:00

Add a interrupts-names property to allow the possibility to provide a name to any interrupts entries. If the name is available, use it to name the resource, otherwise keep the device full name. Signed-off-by: Benoit Cousson Cc: Grant Likely Cc: Rob Herring [grant.likely: use "interrupt-names" and tidy documentation] Signed-off-by: Grant Likely

of/irq: Get rid of NO_IRQ usage

2011-12-07T17:06:37+00:00

PPC32/64 defines NO_IRQ to zero, so no problems expected. ARM defines NO_IRQ to -1, but OF code relies on IRQ domains support, which returns correct ('0') value in 'no irq' case. So everything should be fine. Other arches might break if some of their OF drivers rely on NO_IRQ being not 0. If so, the drivers must be fixed, finally. [ Rob Herring points out that microblaze should be fixed, and has posted a patch for testing for that. - Linus ] Signed-off-by: Anton Vorontsov Acked-by: Wolfram Sang Signed-off-by: Linus Torvalds

of/irq: of_irq_init: add check for parent equal to child node

2011-11-29T14:22:40+00:00

With the revert of "of/irq: of_irq_find_parent: check for parent equal to child" (dc9372808412edb), we need another way to handle parent node equal to the child node. This can simply be handled in of_irq_init by checking for this condition. Signed-off-by: Rob Herring Tested-by: Pawel Moll Tested-by: Stephen Warren

Revert "of/irq: of_irq_find_parent: check for parent equal to child"

2011-11-22T23:09:20+00:00

This reverts commit dc9372808412edbc653a675a526c2ee6c0c14a91. As requested by Ben Herrenschmidt: "This breaks some powerpc platforms at least. The practice of having a node provide an explicit "interrupt-parent" property pointing to itself is an old trick that we've used in the past to allow a device-node to have interrupts routed to different controllers. In that case, the node also contains an interrupt-map, so the node is its own parent, the interrupt resolution hits the map, which then can route each individual interrupt to a different parent." Grant says: "Ah, nuts, yes that is broken then. Yes, please revert the commit and Rob & I will come up with a better solution. Rob, I think it can be done by explicitly checking for np == desc->interrupt_parent in of_irq_init() instead of relying on of_irq_find_parent() returning NULL." Requested-by: Benjamin Herrenschmidt Acked-by: Grant Likely Cc: Rob Herring Cc: devicetree-discuss@lists.ozlabs.org Cc: linuxppc-dev Cc: Tanmay Inamdar Signed-off-by: Linus Torvalds

Merge branch 'next/dt' of git://git.linaro.org/people/arnd/arm-soc

2011-11-02T04:02:35+00:00

* 'next/dt' of git://git.linaro.org/people/arnd/arm-soc: ARM: gic: use module.h instead of export.h ARM: gic: fix irq_alloc_descs handling for sparse irq ARM: gic: add OF based initialization ARM: gic: add irq_domain support irq: support domains with non-zero hwirq base of/irq: introduce of_irq_init ARM: at91: add at91sam9g20 and Calao USB A9G20 DT support ARM: at91: dt: at91sam9g45 family and board device tree files arm/mx5: add device tree support for imx51 babbage arm/mx5: add device tree support for imx53 boards ARM: msm: Add devicetree support for msm8660-surf msm_serial: Add devicetree support msm_serial: Use relative resources for iomem Fix up conflicts in arch/arm/mach-at91/{at91sam9260.c,at91sam9g45.c}

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

of/irq: of_irq_find_parent: check for parent equal to child

2011-10-05T12:39:37+00:00

An interrupt controller may often implicitly inherit itself from a parent node when in fact the controller is the interrupt root controller. Guard against the case of child == parent and return NULL in this case. This can also be fixed by adding an explicit "interrupt-parent;" to a root interrupt controller node. Based on code from Grant Likely. Signed-off-by: Rob Herring Cc: 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: 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

of/irq: Fix endian issues in parsing interrupt specifiers

2010-07-24T22:51:52+00:00

This patch fixes some instances where interrupt specifiers are dereferenced directly instead of doing a be32_to_cpu() conversion first. Signed-off-by: Grant Likely