linux-toradex.git/include/linux/irqdomain.h, branch v4.4.93

irqdomain: Documentation updates

2015-10-13T17:01:25+00:00

Update the IRQ domain documentation to reflect the changes made
while divorcing the domain infrastructure from Device Tree.

Signed-off-by: Marc Zyngier 
Tested-by: Hanjun Guo 
Tested-by: Lorenzo Pieralisi 
Cc: 
Cc: Tomasz Nowicki 
Cc: Suravee Suthikulpanit 
Cc: Graeme Gregory 
Cc: Jake Oshins 
Cc: Jiang Liu 
Cc: Jason Cooper 
Cc: Rafael J. Wysocki 
Link: http://lkml.kernel.org/r/1444737105-31573-18-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner

irqdomain: Introduce irq_domain_create_hierarchy

2015-10-13T17:01:25+00:00

As we're about to start converting the various MSI layers to
use fwnode_handle instead of device_node, add irq_domain_create_hierarchy
as a directly equivalent of irq_domain_add_hierarchy (which still
exists as a compatibility interface).

Signed-off-by: Marc Zyngier 
Tested-by: Hanjun Guo 
Tested-by: Lorenzo Pieralisi 
Cc: 
Cc: Tomasz Nowicki 
Cc: Suravee Suthikulpanit 
Cc: Graeme Gregory 
Cc: Jake Oshins 
Cc: Jiang Liu 
Cc: Jason Cooper 
Cc: Rafael J. Wysocki 
Link: http://lkml.kernel.org/r/1444737105-31573-16-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner

irqdomain: Add a fwnode_handle allocator

2015-10-13T17:01:24+00:00

In order to be able to reference an irqdomain from ACPI, we need
to be able to create an identifier, which is usually a struct
device_node.

This device node does't really fit the ACPI infrastructure, so
we cunningly allocate a new structure containing a fwnode_handle,
and return that.

This structure doesn't really point to a device (interrupt
controllers are not "real" devices in Linux), but as we cannot
really deny that they exist, we create them with a new fwnode_type
(FWNODE_IRQCHIP).

Signed-off-by: Marc Zyngier 
Acked-by: Rafael J. Wysocki 
Reviewed-and-tested-by: Hanjun Guo 
Tested-by: Lorenzo Pieralisi 
Cc: 
Cc: Tomasz Nowicki 
Cc: Suravee Suthikulpanit 
Cc: Graeme Gregory 
Cc: Jake Oshins 
Cc: Jiang Liu 
Cc: Jason Cooper 
Cc: Rafael J. Wysocki 
Link: http://lkml.kernel.org/r/1444737105-31573-9-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner

irqdomain: Introduce irq_domain_create_{linear, tree}

2015-10-13T17:01:24+00:00

Just like we have irq_domain_add_{linear,tree} to create a irq domain
identified by an of_node, introduce irq_domain_create_{linear,tree}
that do the same thing, except that they take a struct fwnode_handle.

Existing functions get rewritten in terms of the new ones so that
everything keeps working as before (and __irq_domain_add is now
fwnode_handle based as well).

Signed-off-by: Marc Zyngier 
Reviewed-and-tested-by: Hanjun Guo 
Tested-by: Lorenzo Pieralisi 
Cc: 
Cc: Tomasz Nowicki 
Cc: Suravee Suthikulpanit 
Cc: Graeme Gregory 
Cc: Jake Oshins 
Cc: Jiang Liu 
Cc: Jason Cooper 
Cc: Rafael J. Wysocki 
Link: http://lkml.kernel.org/r/1444737105-31573-8-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner

irqdomain: Introduce irq_create_fwspec_mapping

2015-10-13T17:01:24+00:00

Just like we have irq_create_of_mapping, irq_create_fwspec_mapping
creates a IRQ domain mapping for an interrupt described in a
struct irq_fwspec.

irq_create_of_mapping gets rewritten in terms of the new function,
and the hack we introduced before gets removed (now that no stacked
irqchip uses of_phandle_args anymore).

Signed-off-by: Marc Zyngier 
Reviewed-and-tested-by: Hanjun Guo 
Tested-by: Lorenzo Pieralisi 
Cc: 
Cc: Tomasz Nowicki 
Cc: Suravee Suthikulpanit 
Cc: Graeme Gregory 
Cc: Jake Oshins 
Cc: Jiang Liu 
Cc: Jason Cooper 
Cc: Rafael J. Wysocki 
Link: http://lkml.kernel.org/r/1444737105-31573-7-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner

irqdomain: Introduce a firmware-specific IRQ specifier structure

2015-10-13T17:01:23+00:00

So far the closest thing to a generic IRQ specifier structure is
of_phandle_args, which happens to be pretty OF specific (the of_node
pointer in there is quite annoying).

Let's introduce 'struct irq_fwspec' that can be used in place of
of_phandle_args for OF, but also for other firmware implementations
(that'd be ACPI). This is used together with a new 'translate' method
that is the pendent of 'xlate'.

We convert irq_create_of_mapping to use this new structure (with a
small hack that will be removed later).

Signed-off-by: Marc Zyngier 
Reviewed-and-tested-by: Hanjun Guo 
Tested-by: Lorenzo Pieralisi 
Cc: 
Cc: Tomasz Nowicki 
Cc: Suravee Suthikulpanit 
Cc: Graeme Gregory 
Cc: Jake Oshins 
Cc: Jiang Liu 
Cc: Jason Cooper 
Cc: Rafael J. Wysocki 
Link: http://lkml.kernel.org/r/1444737105-31573-5-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner

irqdomain: Allow irq domain lookup by fwnode

2015-10-13T17:01:23+00:00

So far, our irq domains are still looked up by device node.
Let's change this and allow a domain to be looked up using
a fwnode_handle pointer.

The existing interfaces are preserved with a couple of helpers.

Signed-off-by: Marc Zyngier 
Reviewed-and-tested-by: Hanjun Guo 
Tested-by: Lorenzo Pieralisi 
Cc: 
Cc: Tomasz Nowicki 
Cc: Suravee Suthikulpanit 
Cc: Graeme Gregory 
Cc: Jake Oshins 
Cc: Jiang Liu 
Cc: Jason Cooper 
Cc: Rafael J. Wysocki 
Link: http://lkml.kernel.org/r/1444737105-31573-4-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner

irqdomain: Convert irqdomain-%3Eof_node to fwnode

2015-10-13T17:01:23+00:00

Now that we have everyone accessing the of_node field via the
irq_domain_get_of_node accessor, it is pretty easy to swap it
for a pointer to a fwnode_handle.

This translates into a few limited changes in __irq_domain_add,
and an updated irq_domain_get_of_node.

Signed-off-by: Marc Zyngier 
Reviewed-and-tested-by: Hanjun Guo 
Tested-by: Lorenzo Pieralisi 
Cc: 
Cc: Tomasz Nowicki 
Cc: Suravee Suthikulpanit 
Cc: Graeme Gregory 
Cc: Jake Oshins 
Cc: Jiang Liu 
Cc: Jason Cooper 
Cc: Rafael J. Wysocki 
Link: http://lkml.kernel.org/r/1444737105-31573-3-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner

irqdomain: Add an accessor for the of_node field

2015-10-09T15:17:30+00:00

As we're about to remove the of_node field from the irqdomain
structure, introduce an accessor for it. Subsequent patches
will take care of the actual repainting.

Signed-off-by: Marc Zyngier 
Cc: Jiang Liu 
Cc: Jason Cooper 
Link: http://lkml.kernel.org/r/1444402211-1141-1-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner

genirq: Add DOMAIN_BUS_NEXUS irqdomain property

2015-07-29T22:14:38+00:00

Some IRQ domains are not designed to directly provide interrupts
to devices, but strictly to be used by other domains. An example
of this is the GICv3 ITS, which is completely bus agnostic, and
on which it is possible to implement a PCI/MSI domain.

Just introduce the irq_domain_bus_token property for now.

Signed-off-by: Marc Zyngier 
Cc: 
Cc: Yijing Wang 
Cc: Ma Jun 
Cc: Lorenzo Pieralisi 
Cc: Duc Dang 
Cc: Hanjun Guo 
Cc: Bjorn Helgaas 
Cc: Jiang Liu 
Cc: Jason Cooper 
Link: http://lkml.kernel.org/r/1438091186-10244-11-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner