This chip supports below interrupt request trigger mode:
Destination Control Register:
BIT[5:4] Interrupt Request Trigger Mode.
00: High level trigger
01: Posedge trigger
10: Negedge trigger
11: Both posedge and negedge trigger
This patch adds support for setting 'posedge and negedge trigger' mode.
Signed-off-by: Axel Lin <axel....@ingics.com>
---
Current code does not correctly handle the case if a driver request irq with
"IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING" flag.
I'm not sure if we have such use case in current code.
drivers/irqchip/irq-vt8500.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/irqchip/irq-vt8500.c b/drivers/irqchip/irq-vt8500.c
index eb6d05a..e040994 100644
--- a/drivers/irqchip/irq-vt8500.c
+++ b/drivers/irqchip/irq-vt8500.c
@@ -136,6 +136,10 @@ static int vt8500_irq_set_type(struct irq_data *d,
unsigned int flow_type)
dctr |= VT8500_TRIGGER_RISING;
__irq_set_handler_locked(d->irq, handle_edge_irq);
break;
+ case IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING:
+ dctr |= VT8500_EDGE;
+ __irq_set_handler_locked(d->irq, handle_edge_irq);
+ break;
}
writeb(dctr, base + VT8500_ICDC + d->hwirq);
--
1.8.1.2
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