Merge tag 'renesas-drivers-for-v6.20-tag2' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel into soc/drivers

Renesas driver updates for v6.20 (take two)

  - Add and use for_each_of_imap_item() iterator,
  - Add support for the RZ/N1 GPIO Interrupt Multiplexer.

* tag 'renesas-drivers-for-v6.20-tag2' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel:
  soc: renesas: Add support for RZ/N1 GPIO Interrupt Multiplexer
  irqchip/renesas-rza1: Use for_each_of_imap_item iterator
  irqchip/ls-extirq: Use for_each_of_imap_item iterator
  of: unittest: Add a test case for for_each_of_imap_item iterator
  of/irq: Introduce for_each_of_imap_item

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 40 insertions, 1 deletions

diff --git a/include/linux/of_irq.h b/include/linux/of_irq.h
index 1c2bc0281807..2a64d8cecaae 100644
--- a/include/linux/of_irq.h
+++ b/include/linux/of_irq.h
@@ -11,6 +11,30 @@
 
 typedef int (*of_irq_init_cb_t)(struct device_node *, struct device_node *);
 
+struct of_imap_parser {
+	struct device_node *node;
+	const __be32 *imap;
+	const __be32 *imap_end;
+	u32 parent_offset;
+};
+
+struct of_imap_item {
+	struct of_phandle_args parent_args;
+	u32 child_imap_count;
+	u32 child_imap[16]; /* Arbitrary size.
+			     * Should be #address-cells + #interrupt-cells but
+			     * avoid using allocation and so, expect that 16
+			     * should be enough
+			     */
+};
+
+/*
+ * If the iterator is exited prematurely (break, goto, return) of_node_put() has
+ * to be called on item.parent_args.np
+ */
+#define for_each_of_imap_item(parser, item) \
+	for (; of_imap_parser_one(parser, item);)
+
 /*
  * Workarounds only applied to 32bit powermac machines
  */
@@ -49,6 +73,11 @@ 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 int of_imap_parser_init(struct of_imap_parser *parser,
+			       struct device_node *node,
+			       struct of_imap_item *item);
+extern struct of_imap_item *of_imap_parser_one(struct of_imap_parser *parser,
+					       struct of_imap_item *item);
 extern struct irq_domain *of_msi_get_domain(struct device *dev,
 					    const struct device_node *np,
 					    enum irq_domain_bus_token token);
@@ -92,7 +121,17 @@ static inline void *of_irq_find_parent(struct device_node *child)
 {
 	return NULL;
 }
-
+static inline int of_imap_parser_init(struct of_imap_parser *parser,
+				      struct device_node *node,
+				      struct of_imap_item *item)
+{
+	return -ENOSYS;
+}
+static inline struct of_imap_item *of_imap_parser_one(struct of_imap_parser *parser,
+						      struct of_imap_item *item)
+{
+	return NULL;
+}
 static inline struct irq_domain *of_msi_get_domain(struct device *dev,
 						   struct device_node *np,
 						   enum irq_domain_bus_token token)