[tip: irq/core] irqchip/mmp: Coexist with GIC root IRQ controller

[tip-bot2 for Lubomir Rintel]

The following commit has been merged into the irq/core branch of tip:

Commit-ID:     2178add02238f8352f5b3294a79f4763183aade6
Gitweb:        https://git.kernel.org/tip/2178add02238f8352f5b3294a79f4763183aade6
Author:        Lubomir Rintel <lkundrak@xxxxx>
AuthorDate:    Thu, 22 Aug 2019 11:26:32 +02:00
Committer:     Marc Zyngier <maz@xxxxxxxxxx>
CommitterDate: Fri, 30 Aug 2019 15:23:30 +01:00

irqchip/mmp: Coexist with GIC root IRQ controller

On MMP3, the GIC can be set as a root IRQ interrupt controller. If the
device tree indicated that GIC is enabled, avoid hooking up
mmp2_handle_irq().

The interrupt muxes are still being used.

Signed-off-by: Lubomir Rintel <lkundrak@xxxxx>
Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20190822092643.593488-10-lkundrak@xxxxx
---
 drivers/irqchip/irq-mmp.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-mmp.c b/drivers/irqchip/irq-mmp.c
index da290d8..4a74ac7 100644
--- a/drivers/irqchip/irq-mmp.c
+++ b/drivers/irqchip/irq-mmp.c
@@ -468,7 +468,12 @@ static int __init mmp3_of_init(struct device_node *node,
 	icu_data[0].conf_disable = mmp3_conf.conf_disable;
 	icu_data[0].conf_mask = mmp3_conf.conf_mask;
 	icu_data[0].conf2_mask = mmp3_conf.conf2_mask;
-	set_handle_irq(mmp2_handle_irq);
+
+	if (!parent) {
+		/* This is the main interrupt controller. */
+		set_handle_irq(mmp2_handle_irq);
+	}
+
 	max_icu_nr = 1;
 	return 0;
 }