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authorThomas Gleixner <tglx@linutronix.de>2013-05-06 14:30:27 +0000
committerThomas Gleixner <tglx@linutronix.de>2013-05-29 10:57:11 +0200
commit088f40b7b027dad6519712ff224a5798dd62a204 (patch)
treebae6f2d67cc4516471d3b4a6a80da31962cb804b /include/linux/irqdomain.h
parent3528d82b684680b72fa31881c8c572c5a98b51de (diff)
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genirq: Generic chip: Add linear irq domain support
Provide infrastructure for irq chip implementations which work on linear irq domains. - Interface to allocate multiple generic chips which are associated to the irq domain. - Interface to get the generic chip pointer for a particular hardware interrupt in the domain. - irq domain mapping function to install the chip for a particular interrupt. Note: This lacks a removal function for now. [ Sebastian Hesselbarth: Mask cache and pointer math fixups ] Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Cc: Andrew Lunn <andrew@lunn.ch> Cc: Russell King - ARM Linux <linux@arm.linux.org.uk> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Jean-Francois Moine <moinejf@free.fr> Cc: devicetree-discuss@lists.ozlabs.org Cc: Rob Herring <rob.herring@calxeda.com> Cc: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Cc: Gregory Clement <gregory.clement@free-electrons.com> Cc: Gerlando Falauto <gerlando.falauto@keymile.com> Cc: Rob Landley <rob@landley.net> Acked-by: Grant Likely <grant.likely@linaro.org> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> Cc: linux-arm-kernel@lists.infradead.org Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Link: http://lkml.kernel.org/r/20130506142539.450634298@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/linux/irqdomain.h')
-rw-r--r--include/linux/irqdomain.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
index 0d5b17bf5e51..ba2c708adcff 100644
--- a/include/linux/irqdomain.h
+++ b/include/linux/irqdomain.h
@@ -66,6 +66,10 @@ struct irq_domain_ops {
unsigned long *out_hwirq, unsigned int *out_type);
};
+extern struct irq_domain_ops irq_generic_chip_ops;
+
+struct irq_domain_chip_generic;
+
/**
* struct irq_domain - Hardware interrupt number translation object
* @link: Element in global irq_domain list.
@@ -109,8 +113,16 @@ struct irq_domain {
/* Optional device node pointer */
struct device_node *of_node;
+ /* Optional pointer to generic interrupt chips */
+ struct irq_domain_chip_generic *gc;
};
+#define IRQ_DOMAIN_MAP_LEGACY 0 /* driver allocated fixed range of irqs.
+ * ie. legacy 8259, gets irqs 1..15 */
+#define IRQ_DOMAIN_MAP_NOMAP 1 /* no fast reverse mapping */
+#define IRQ_DOMAIN_MAP_LINEAR 2 /* linear map of interrupts */
+#define IRQ_DOMAIN_MAP_TREE 3 /* radix tree */
+
#ifdef CONFIG_IRQ_DOMAIN
struct irq_domain *irq_domain_add_simple(struct device_node *of_node,
unsigned int size,