irqdomain: Introduce a firmware-specific IRQ specifier structure

[firefly-linux-kernel-4.4.55.git] / include / linux / irqdomain.h

diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
index 607c1856cc018dbeef08e7eb872ba504d6cfcc0d..533c974b9d94f0d07d80fbeb725fc53e25944e1b 100644 (file)
--- a/include/linux/irqdomain.h
+++ b/include/linux/irqdomain.h
@@ -46,6 +46,24 @@ struct irq_data;
 /* Number of irqs reserved for a legacy isa controller */
 #define NUM_ISA_INTERRUPTS     16
 
+#define IRQ_DOMAIN_IRQ_SPEC_PARAMS 16
+
+/**
+ * struct irq_fwspec - generic IRQ specifier structure
+ *
+ * @fwnode:            Pointer to a firmware-specific descriptor
+ * @param_count:       Number of device-specific parameters
+ * @param:             Device-specific parameters
+ *
+ * This structure, directly modeled after of_phandle_args, is used to
+ * pass a device-specific description of an interrupt.
+ */
+struct irq_fwspec {
+       struct fwnode_handle *fwnode;
+       int param_count;
+       u32 param[IRQ_DOMAIN_IRQ_SPEC_PARAMS];
+};
+
 /*
  * Should several domains have the same device node, but serve
  * different purposes (for example one domain is for PCI/MSI, and the
@@ -92,6 +110,8 @@ struct irq_domain_ops {
                     unsigned int nr_irqs);
        void (*activate)(struct irq_domain *d, struct irq_data *irq_data);
        void (*deactivate)(struct irq_domain *d, struct irq_data *irq_data);
+       int (*translate)(struct irq_domain *d, struct irq_fwspec *fwspec,
+                        unsigned long *out_hwirq, unsigned int *out_type);
 #endif
 };