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irqdomain: Make of_phandle_args_to_fwspec() generally available

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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 to the rest of the kernel, including modules.

Link: https://lore.kernel.org/r/20210929163847.2807812-2-maz@kernel.org
Tested-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Marc Zyngier 2021-09-29 17:38:34 +01:00 committed by Bjorn Helgaas
parent e4e737bb5c
commit 0ab8d0f6ae
2 changed files with 7 additions and 3 deletions
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4
include/linux/irqdomain.h
View File

@ -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

6
kernel/irq/irqdomain.c
View File

@ -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)
{