[PATCH v3 4/6] ARM: OMAP: wakeupgen: fix arm gic irq type configuration

From: Grygorii Strashko
Date: Fri Aug 14 2015 - 08:22:08 EST

It's observed that ARM GIC IRQ triggering type is not configured
properly when IRQ is routed through IRQ domain hierarchy and
system started using DT. As result, system will start using default
ARM GIC configuration, ignore DT IRQ triggering configuration,
and value of desc->irq_data.state_use_accessors = 0.

In case of TI OMAP DRA7 the following IRQ hierarchy is defined:
ARM GIC <- OMAP wakeupgen <- TI CBAR

Failed call chain:
if (!chip || !chip->irq_set_type) {
return 0; <- return here
OMAP wakeupgen has no .irq_set_type() defined and, so, IRQ triggering
configuration will not be propagated to parent IRQ domain.

Hence, fix it by using irq_chip_set_type_parent() for
propagation IRQ triggering type to parent IRQ domains.

Cc: Sudeep Holla <sudeep.holla@xxxxxxx>
Fixes: 7136d457f365 ('ARM: omap: convert wakeupgen to stacked domains')
Acked-by: Tony Lindgren <tony@xxxxxxxxxxx>
Signed-off-by: Grygorii Strashko <grygorii.strashko@xxxxxx>
arch/arm/mach-omap2/omap-wakeupgen.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/arch/arm/mach-omap2/omap-wakeupgen.c b/arch/arm/mach-omap2/omap-wakeupgen.c
index 8e52621..e1d2e99 100644
--- a/arch/arm/mach-omap2/omap-wakeupgen.c
+++ b/arch/arm/mach-omap2/omap-wakeupgen.c
@@ -392,6 +392,7 @@ static struct irq_chip wakeupgen_chip = {
.irq_mask = wakeupgen_mask,
.irq_unmask = wakeupgen_unmask,
.irq_retrigger = irq_chip_retrigger_hierarchy,
+ .irq_set_type = irq_chip_set_type_parent,
.irq_set_affinity = irq_chip_set_affinity_parent,

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/