irqchip: versatile-fpga: Add IRQCHIP_DECLARE support

Add support for initialization using IRQCHIP_DECLARE. This also requires
that the controller initialization set the handle_irq function pointer
itself when it is a primary controller.

Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Acked-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/irqchip/irq-versatile-fpga.c b/drivers/irqchip/irq-versatile-fpga.c
index 3ae2bb8d9cf2..8e0bb566bfaa 100644
--- a/drivers/irqchip/irq-versatile-fpga.c
+++ b/drivers/irqchip/irq-versatile-fpga.c
@@ -14,6 +14,8 @@
 #include <asm/exception.h>
 #include <asm/mach/irq.h>
 
+#include "irqchip.h"
+
 #define IRQ_STATUS              0x00
 #define IRQ_RAW_STATUS          0x04
 #define IRQ_ENABLE_SET          0x08
@@ -201,8 +203,10 @@ int __init fpga_irq_of_init(struct device_node *node,
 
         /* Some chips are cascaded from a parent IRQ */
         parent_irq = irq_of_parse_and_map(node, 0);
-        if (!parent_irq)
+        if (!parent_irq) {
+                set_handle_irq(fpga_handle_irq);
                 parent_irq = -1;
+        }
 
         fpga_irq_init(base, node->name, 0, parent_irq, valid_mask, node);
 
@@ -211,4 +215,5 @@ int __init fpga_irq_of_init(struct device_node *node,
 
         return 0;
 }
+IRQCHIP_DECLARE(arm_fpga, "arm,versatile-fpga-irq", fpga_irq_of_init);
 #endif