[PATCH 1/7] genirq: add irq_get_trigger_type() to get IRQ flags

[Javier Martinez Canillas <javier.martinez@collabora.co.uk>]

Drivers that want to get the trigger edge/level type flags for a
given interrupt have to first call irq_get_irq_data(irq) to get
the struct irq_data and then irqd_get_trigger_type(irq_data) to
obtain the IRQ flags.

This is not only error prone but also unnecessary exposes the
struct irq_data to callers.

It's better to have an irq_get_trigger_type() function to obtain
the edge/level flags for an IRQ.

Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
---
 include/linux/irq.h |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/include/linux/irq.h b/include/linux/irq.h
index bc4e066..0e8e3a6 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -579,6 +579,12 @@ static inline struct msi_desc *irq_data_get_msi(struct irq_data *d)
 	return d->msi_desc;
 }
 
+static inline u32 irq_get_trigger_type(unsigned int irq)
+{
+	struct irq_data *d = irq_get_irq_data(irq);
+	return d ? irqd_get_trigger_type(d) : 0;
+}
+
 int __irq_alloc_descs(int irq, unsigned int from, unsigned int cnt, int node,
 		struct module *owner);
 
-- 
1.7.7.6