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 <lkund...@v3.sk>
---
 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 25848d73f6792..c8e7b098ccf71 100644
--- a/drivers/irqchip/irq-mmp.c
+++ b/drivers/irqchip/irq-mmp.c
@@ -470,7 +470,12 @@ 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;
 }
-- 
2.21.0

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