irqchip: gic: Add an entry point to set up irqchip flags

A common use of gic_arch_extn is to set up additional flags
to the GIC irqchip. It looks like a benign enough hack that
doesn't really require the users of that feature to be converted
to stacked domains.

Add a gic_set_irqchip_flags() function that platform code can
call instead of using the dreaded gic_arch_extn.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Link: https://lkml.kernel.org/r/1426088737-15817-2-git-send-email-marc.zyngier@arm.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
index 4634cf7d0ec3..072432c22207 100644
--- a/drivers/irqchip/irq-gic.c
+++ b/drivers/irqchip/irq-gic.c
@@ -922,6 +922,11 @@ static const struct irq_domain_ops gic_default_routable_irq_domain_ops = {
 const struct irq_domain_ops *gic_routable_irq_domain_ops =
                                         &gic_default_routable_irq_domain_ops;
 
+void gic_set_irqchip_flags(unsigned long flags)
+{
+        gic_chip.flags |= flags;
+}
+
 void __init gic_init_bases(unsigned int gic_nr, int irq_start,
                            void __iomem *dist_base, void __iomem *cpu_base,
                            u32 percpu_offset, struct device_node *node)