[PATCH 08/19] irqchip/mmp: coexist with GIC root IRQ controller

[Lubomir Rintel]

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 | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/irqchip/irq-mmp.c b/drivers/irqchip/irq-mmp.c
index 25497c75cc861..28feb0f393056 100644
--- a/drivers/irqchip/irq-mmp.c
+++ b/drivers/irqchip/irq-mmp.c
@@ -472,8 +472,13 @@ 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;
-       irq_set_default_host(icu_data[0].domain);
-       set_handle_irq(mmp2_handle_irq);
+
+       if (!parent) {
+               /* This is the main interrupt controller. */
+               irq_set_default_host(icu_data[0].domain);
+               set_handle_irq(mmp2_handle_irq);
+       }
+
        max_icu_nr = 1;
        return 0;
 }
-- 
2.21.0