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Subject[PATCH v4 02/10] irqdomain: add bus token DOMAIN_BUS_WAKEUP
A single controller can handle normal interrupts and wake-up interrupts
independently, with a different numbering space. It is thus crucial to
allow the driver for such a controller discriminate between the two.

A simple way to do so is to tag the wake-up irqdomain with a "bus token"
that indicates the wake-up domain. This slightly abuses the notion of
bus, but also radically simplifies the design of such a driver. Between
two evils, we choose the least damaging.

Suggested-by: Stephen Boyd <>
Signed-off-by: Lina Iyer <>
Changes in v4:
- Update commit text
include/linux/irqdomain.h | 1 +
1 file changed, 1 insertion(+)

diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
index 35965f41d7be..05055bc992ab 100644
--- a/include/linux/irqdomain.h
+++ b/include/linux/irqdomain.h
@@ -82,6 +82,7 @@ enum irq_domain_bus_token {

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