[v5,01/14] irqdomain: Make of_phandle_args_to_fwspec generally available

Commit Message

Marc Zyngier Sept. 29, 2021, 4:38 p.m. UTC

of_phandle_args_to_fwspec() can be generally useful to code
extracting a DT of_phandle and using an irq_fwspec to use the
hierarchical irqdomain API.

Make it visible the the rest of the kernel, including modules.

Tested-by: Alyssa Rosenzweig <[e-mail]>
Signed-off-by: Marc Zyngier <[e-mail]>
---
 include/linux/irqdomain.h | 4 ++++
 kernel/irq/irqdomain.c    | 6 +++---
 2 files changed, 7 insertions(+), 3 deletions(-)

Patch

diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
index 9ee238ad29ce..553da4899f55 100644
--- a/include/linux/irqdomain.h
+++ b/include/linux/irqdomain.h
@@ -64,6 +64,10 @@  struct irq_fwspec {
 	u32 param[IRQ_DOMAIN_IRQ_SPEC_PARAMS];
 };
 
+/* Conversion function from of_phandle_args fields to fwspec  */
+void of_phandle_args_to_fwspec(struct device_node *np, const u32 *args,
+			       unsigned int count, struct irq_fwspec *fwspec);
+
 /*
  * Should several domains have the same device node, but serve
  * different purposes (for example one domain is for PCI/MSI, and the
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 4d8fc65cf38f..e14adda218b7 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -744,9 +744,8 @@  static int irq_domain_translate(struct irq_domain *d,
 	return 0;
 }
 
-static void of_phandle_args_to_fwspec(struct device_node *np, const u32 *args,
-				      unsigned int count,
-				      struct irq_fwspec *fwspec)
+void of_phandle_args_to_fwspec(struct device_node *np, const u32 *args,
+			       unsigned int count, struct irq_fwspec *fwspec)
 {
 	int i;
 
@@ -756,6 +755,7 @@  static void of_phandle_args_to_fwspec(struct device_node *np, const u32 *args,
 	for (i = 0; i < count; i++)
 		fwspec->param[i] = args[i];
 }
+EXPORT_SYMBOL_GPL(of_phandle_args_to_fwspec);
 
 unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec)
 {