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genirq: Introduce irq_domain_translate_onecell

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Add a new function irq_domain_translate_onecell() that is to be used as
the translate function in struct irq_domain_ops.

Signed-off-by: Yash Shah <yash.shah@sifive.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/1575976274-13487-2-git-send-email-yash.shah@sifive.com
This commit is contained in:
Yash Shah 2019-12-10 16:41:09 +05:30 committed by Marc Zyngier
parent fd6988496e
commit b01ecceaf2
2 changed files with 22 additions and 0 deletions
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5
include/linux/irqdomain.h
View File

@ -427,6 +427,11 @@ int irq_domain_translate_twocell(struct irq_domain *d,
unsigned long *out_hwirq,
unsigned int *out_type);
int irq_domain_translate_onecell(struct irq_domain *d,
struct irq_fwspec *fwspec,
unsigned long *out_hwirq,
unsigned int *out_type);
/* IPI functions */
int irq_reserve_ipi(struct irq_domain *domain, const struct cpumask *dest);
int irq_destroy_ipi(unsigned int irq, const struct cpumask *dest);

17
kernel/irq/irqdomain.c
View File

@ -986,6 +986,23 @@ const struct irq_domain_ops irq_domain_simple_ops = {
};
EXPORT_SYMBOL_GPL(irq_domain_simple_ops);
/**
* irq_domain_translate_onecell() - Generic translate for direct one cell
* bindings
*/
int irq_domain_translate_onecell(struct irq_domain *d,
struct irq_fwspec *fwspec,
unsigned long *out_hwirq,
unsigned int *out_type)
{
if (WARN_ON(fwspec->param_count < 1))
return -EINVAL;
*out_hwirq = fwspec->param[0];
*out_type = IRQ_TYPE_NONE;
return 0;
}
EXPORT_SYMBOL_GPL(irq_domain_translate_onecell);
/**
* irq_domain_translate_twocell() - Generic translate for direct two cell
* bindings