arm: orion: Use generic irq chip

The core interrupt chip is a straight forward conversion. The gpio
chip is implemented with two instances of the irq_chip_type which can
be switched with the irq_set_type function. That allows us to use the
generic callbacks and avoids the conditionals in them.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Nicolas Pitre <nico@fluxnic.net>

1 files changed, 9 insertions, 40 deletions

diff --git a/arch/arm/plat-orion/irq.c b/arch/arm/plat-orion/irq.c
index d8d638e09f8f..2d5b9c1ef389 100644
--- a/arch/arm/plat-orion/irq.c
+++ b/arch/arm/plat-orion/irq.c
@@ -14,52 +14,21 @@
 #include <linux/io.h>
 #include <plat/irq.h>
 
-static void orion_irq_mask(struct irq_data *d)
-{
-	void __iomem *maskaddr = irq_data_get_irq_chip_data(d);
-	u32 mask;
-
-	mask = readl(maskaddr);
-	mask &= ~(1 << (d->irq & 31));
-	writel(mask, maskaddr);
-}
-
-static void orion_irq_unmask(struct irq_data *d)
-{
-	void __iomem *maskaddr = irq_data_get_irq_chip_data(d);
-	u32 mask;
-
-	mask = readl(maskaddr);
-	mask |= 1 << (d->irq & 31);
-	writel(mask, maskaddr);
-}
-
-static struct irq_chip orion_irq_chip = {
-	.name		= "orion_irq",
-	.irq_mask	= orion_irq_mask,
-	.irq_mask_ack	= orion_irq_mask,
-	.irq_unmask	= orion_irq_unmask,
-};
-
 void __init orion_irq_init(unsigned int irq_start, void __iomem *maskaddr)
 {
-	unsigned int i;
+	struct irq_chip_generic *gc;
+	struct irq_chip_type *ct;
 
 	/*
 	 * Mask all interrupts initially.
 	 */
 	writel(0, maskaddr);
 
-	/*
-	 * Register IRQ sources.
-	 */
-	for (i = 0; i < 32; i++) {
-		unsigned int irq = irq_start + i;
-
-		irq_set_chip_and_handler(irq, &orion_irq_chip,
-					 handle_level_irq);
-		irq_set_chip_data(irq, maskaddr);
-		irq_set_status_flags(irq, IRQ_LEVEL);
-		set_irq_flags(irq, IRQF_VALID);
-	}
+	gc = irq_alloc_generic_chip("orion_irq", 1, irq_start, maskaddr,
+				    handle_level_irq);
+	ct = gc->chip_types;
+	ct->chip.irq_mask = irq_gc_mask_clr_bit;
+	ct->chip.irq_unmask = irq_gc_mask_set_bit;
+	irq_setup_generic_chip(gc, IRQ_MSK(32), IRQ_GC_INIT_MASK_CACHE,
+			       IRQ_NOREQUEST, IRQ_LEVEL | IRQ_NOPROBE);
 }