1 files changed, 126 insertions, 0 deletions
diff --git a/include/linux/of_irq.h b/include/linux/of_irq.h
new file mode 100644
index 000000000..d6d3eae2f
--- /dev/null
+++ b/include/linux/of_irq.h
@@ -0,0 +1,126 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __OF_IRQ_H
+#define __OF_IRQ_H
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/ioport.h>
+#include <linux/of.h>
+
+typedef int (*of_irq_init_cb_t)(struct device_node *, struct device_node *);
+
+/*
+ * Workarounds only applied to 32bit powermac machines
+ */
+#define OF_IMAP_OLDWORLD_MAC	0x00000001
+#define OF_IMAP_NO_PHANDLE	0x00000002
+
+#if defined(CONFIG_PPC32) && defined(CONFIG_PPC_PMAC)
+extern unsigned int of_irq_workarounds;
+extern struct device_node *of_irq_dflt_pic;
+int of_irq_parse_oldworld(const struct device_node *device, int index,
+			  struct of_phandle_args *out_irq);
+#else /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
+#define of_irq_workarounds (0)
+#define of_irq_dflt_pic (NULL)
+static inline int of_irq_parse_oldworld(const struct device_node *device, int index,
+				      struct of_phandle_args *out_irq)
+{
+	return -EINVAL;
+}
+#endif /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
+
+extern int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq);
+extern unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data);
+extern int of_irq_to_resource(struct device_node *dev, int index,
+			      struct resource *r);
+
+#ifdef CONFIG_OF_IRQ
+extern void of_irq_init(const struct of_device_id *matches);
+extern int of_irq_parse_one(struct device_node *device, int index,
+			  struct of_phandle_args *out_irq);
+extern int of_irq_count(struct device_node *dev);
+extern int of_irq_get(struct device_node *dev, int index);
+extern int of_irq_get_byname(struct device_node *dev, const char *name);
+extern int of_irq_to_resource_table(struct device_node *dev,
+		struct resource *res, int nr_irqs);
+extern struct device_node *of_irq_find_parent(struct device_node *child);
+extern struct irq_domain *of_msi_get_domain(struct device *dev,
+					    struct device_node *np,
+					    enum irq_domain_bus_token token);
+extern struct irq_domain *of_msi_map_get_device_domain(struct device *dev,
+							u32 id,
+							u32 bus_token);
+extern void of_msi_configure(struct device *dev, struct device_node *np);
+u32 of_msi_map_id(struct device *dev, struct device_node *msi_np, u32 id_in);
+#else
+static inline void of_irq_init(const struct of_device_id *matches)
+{
+}
+static inline int of_irq_parse_one(struct device_node *device, int index,
+				   struct of_phandle_args *out_irq)
+{
+	return -EINVAL;
+}
+static inline int of_irq_count(struct device_node *dev)
+{
+	return 0;
+}
+static inline int of_irq_get(struct device_node *dev, int index)
+{
+	return 0;
+}
+static inline int of_irq_get_byname(struct device_node *dev, const char *name)
+{
+	return 0;
+}
+static inline int of_irq_to_resource_table(struct device_node *dev,
+					   struct resource *res, int nr_irqs)
+{
+	return 0;
+}
+static inline void *of_irq_find_parent(struct device_node *child)
+{
+	return NULL;
+}
+
+static inline struct irq_domain *of_msi_get_domain(struct device *dev,
+						   struct device_node *np,
+						   enum irq_domain_bus_token token)
+{
+	return NULL;
+}
+static inline struct irq_domain *of_msi_map_get_device_domain(struct device *dev,
+						u32 id, u32 bus_token)
+{
+	return NULL;
+}
+static inline void of_msi_configure(struct device *dev, struct device_node *np)
+{
+}
+static inline u32 of_msi_map_id(struct device *dev,
+				 struct device_node *msi_np, u32 id_in)
+{
+	return id_in;
+}
+#endif
+
+#if defined(CONFIG_OF_IRQ) || defined(CONFIG_SPARC)
+/*
+ * irq_of_parse_and_map() is used by all OF enabled platforms; but SPARC
+ * implements it differently.  However, the prototype is the same for all,
+ * so declare it here regardless of the CONFIG_OF_IRQ setting.
+ */
+extern unsigned int irq_of_parse_and_map(struct device_node *node, int index);
+
+#else /* !CONFIG_OF && !CONFIG_SPARC */
+static inline unsigned int irq_of_parse_and_map(struct device_node *dev,
+						int index)
+{
+	return 0;
+}
+#endif /* !CONFIG_OF */
+
+#endif /* __OF_IRQ_H */