Commit 0ab8d0f6 authored by Marc Zyngier's avatar Marc Zyngier Committed by Bjorn Helgaas
Browse files

irqdomain: Make of_phandle_args_to_fwspec() generally available 

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: default avatarAlyssa Rosenzweig <alyssa@rosenzweig.io>
Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
Signed-off-by: default avatarLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
parent e4e737bb

include/linux/irqdomain.h

+4 −0
Original line number Original line Diff line number Diff line
@@ -64,6 +64,10 @@ struct irq_fwspec { 
	u32 param[IRQ_DOMAIN_IRQ_SPEC_PARAMS];

	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

 * Should several domains have the same device node, but serve

 * different purposes (for example one domain is for PCI/MSI, and the

 * different purposes (for example one domain is for PCI/MSI, and the

kernel/irq/irqdomain.c

+3 −3
Original line number Original line Diff line number Diff line
@@ -744,9 +744,8 @@ static int irq_domain_translate(struct irq_domain *d, 
	return 0;

	return 0;

}

}





static void of_phandle_args_to_fwspec(struct device_node *np, const u32 *args,

void of_phandle_args_to_fwspec(struct device_node *np, const u32 *args,

				      unsigned int count,

			       unsigned int count, struct irq_fwspec *fwspec)

				      struct irq_fwspec *fwspec)

{

{

	int i;

	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++)

	for (i = 0; i < count; i++)

		fwspec->param[i] = args[i];

		fwspec->param[i] = args[i];

}

}

EXPORT_SYMBOL_GPL(of_phandle_args_to_fwspec);





unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec)

unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec)

{

{