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genirq: Introduce irq_chip_set_type_parent() helper

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This helper is required for irq chips which do not implement a
irq_set_type callback and need to call down the irq domain hierarchy
for the actual trigger type change.

This helper is required to fix further wreckage caused by the
conversion of TI OMAP to hierarchical irq domains and therefor tagged
for stable.

[ tglx: Massaged changelog ]

Signed-off-by: Grygorii Strashko <[email protected]>
Cc: Sudeep Holla <[email protected]>
Cc: <[email protected]>
Cc: <[email protected]>
Cc: <[email protected]>
Cc: <[email protected]>
Cc: <[email protected]>
Cc: <[email protected]>
Cc: <[email protected]>
Cc: [email protected] # 4.1
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Thomas Gleixner <[email protected]>
This commit is contained in:
Grygorii Strashko 2015-08-14 15:20:26 +03:00 • committed by Thomas Gleixner
commit b7560de198
2 changed files with 18 additions and 0 deletions
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17
kernel/irq/chip.c
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@ -984,6 +984,23 @@ int irq_chip_set_affinity_parent(struct irq_data *data,
return -ENOSYS;
}
/**
* irq_chip_set_type_parent - Set IRQ type on the parent interrupt
* @data: Pointer to interrupt specific data
* @type: IRQ_TYPE_{LEVEL,EDGE}_* value - see include/linux/irq.h
*
* Conditional, as the underlying parent chip might not implement it.
*/
int irq_chip_set_type_parent(struct irq_data *data, unsigned int type)
{
data = data->parent_data;
if (data->chip->irq_set_type)
return data->chip->irq_set_type(data, type);
return -ENOSYS;
}
/**
* irq_chip_retrigger_hierarchy - Retrigger an interrupt in hardware
* @data: Pointer to interrupt specific data