irq: Add IRQ_TYPE_DEFAULT for use by PIC drivers (3fca40c7) · Commits · 戴 / test

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:

Benjamin Herrenschmidt <benh@kernel.crashing.org>

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,

Admin message