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genirq: Add irqchip_set_wake_parent 

This proves to be useful with stacked domains, when the current
domain doesn't implement wake-up, but expect the parent to do so.

Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Link: https://lkml.kernel.org/r/1426088629-15377-2-git-send-email-marc.zyngier@arm.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
hifive-unleashed-5.1
Marc Zyngier 2015-03-11 15:43:43 +00:00 committed by Jason Cooper
parent c517d838eb
commit 08b55e2a92
2 changed files with 17 additions and 0 deletions
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1
include/linux/irq.h
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@ -460,6 +460,7 @@ extern void irq_chip_eoi_parent(struct irq_data *data);
extern int irq_chip_set_affinity_parent(struct irq_data *data,
const struct cpumask *dest,
bool force);
extern int irq_chip_set_wake_parent(struct irq_data *data, unsigned int on);
#endif
/* Handling of unhandled and spurious interrupts: */

16
kernel/irq/chip.c
View File

@ -948,6 +948,22 @@ int irq_chip_retrigger_hierarchy(struct irq_data *data)
return -ENOSYS;
}
/**
* irq_chip_set_wake_parent - Set/reset wake-up on the parent interrupt
* @data: Pointer to interrupt specific data
* @on: Whether to set or reset the wake-up capability of this irq
*
* Conditional, as the underlying parent chip might not implement it.
*/
int irq_chip_set_wake_parent(struct irq_data *data, unsigned int on)
{
data = data->parent_data;
if (data->chip->irq_set_wake)
return data->chip->irq_set_wake(data, on);
return -ENOSYS;
}
#endif
/**