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ACPI: Add support for ResourceSource/IRQ domain mapping

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ACPI extended IRQ resources may contain a ResourceSource to specify
an alternate interrupt controller. Introduce acpi_irq_get and use it
to implement ResourceSource/IRQ domain mapping.

The new API is similar to of_irq_get and allows re-initialization
of a platform resource from the ACPI extended IRQ resource, and
provides proper behavior for probe deferral when the domain is not
yet present when called.

Acked-by: Rafael J. Wysocki <rafael@kernel.org>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
Tested-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Agustin Vega-Frias <agustinv@codeaurora.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Agustin Vega-Frias 2017-02-02 18:23:58 -05:00 • committed by Marc Zyngier
parent fa20b176f6
commit d44fa3d460
5 changed files with 318 additions and 99 deletions
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10
include/linux/acpi.h
View file

@ -1153,4 +1153,14 @@ int parse_spcr(bool earlycon);
static inline int parse_spcr(bool earlycon) { return 0; }
#endif
#if IS_ENABLED(CONFIG_ACPI_GENERIC_GSI)
int acpi_irq_get(acpi_handle handle, unsigned int index, struct resource *res);
#else
static inline
int acpi_irq_get(acpi_handle handle, unsigned int index, struct resource *res)
{
return -EINVAL;
}
#endif
#endif /*_LINUX_ACPI_H*/