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Commit 3fca40c7 authored by Benjamin Herrenschmidt's avatar Benjamin Herrenschmidt
Browse files

irq: Add IRQ_TYPE_DEFAULT for use by PIC drivers 



This is meant typically to allow a PIC driver's irq domain map() callback
to establish sane defaults for the interrupt (and make sure that the HW
and the irq_desc are in sync as far as the trigger is concerned).

The irq core may not call the set_trigger callback if it thinks the
trigger is already set to the right setting, so we need to ensure new
descriptors are properly synchronized with the hardware.

Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 3a2b4f7c

include/linux/irq.h

+7 −0
Original line number Diff line number Diff line
@@ -49,6 +49,12 @@ typedef void (*irq_preflow_handler_t)(struct irq_data *data); 
 * IRQ_TYPE_LEVEL_LOW		- low level triggered

 * IRQ_TYPE_LEVEL_MASK		- Mask to filter out the level bits

 * IRQ_TYPE_SENSE_MASK		- Mask for all the above bits

 * IRQ_TYPE_DEFAULT		- For use by some PICs to ask irq_set_type

 *				  to setup the HW to a sane default (used

 *                                by irqdomain map() callbacks to synchronize

 *                                the HW state and SW flags for a newly

 *                                allocated descriptor).

 *

 * IRQ_TYPE_PROBE		- Special flag for probing in progress

 *

 * Bits which can be modified via irq_set/clear/modify_status_flags()
@@ -77,6 +83,7 @@ enum { 
	IRQ_TYPE_LEVEL_LOW	= 0x00000008,

	IRQ_TYPE_LEVEL_MASK	= (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH),

	IRQ_TYPE_SENSE_MASK	= 0x0000000f,

	IRQ_TYPE_DEFAULT	= IRQ_TYPE_SENSE_MASK,



	IRQ_TYPE_PROBE		= 0x00000010,