Merge branch 'devel-genirq' of git://git.kernel.org/pub/scm/linux/ker…

…nel/git/tmlind/linux-omap-2.6 into devel-stable

arch/arm/mach-omap2/irq.c

@@ -73,83 +73,18 @@ static u32 intc_bank_read_reg(struct omap_irq_bank *bank, u16 reg)
 	return __raw_readl(bank->base_reg + reg);
 }
 
-static int previous_irq;
-
-/*
- * On 34xx we can get occasional spurious interrupts if the ack from
- * an interrupt handler does not get posted before we unmask. Warn about
- * the interrupt handlers that need to flush posted writes.
- */
-static int omap_check_spurious(unsigned int irq)
-{
-	u32 sir, spurious;
-
-	sir = intc_bank_read_reg(&irq_banks[0], INTC_SIR);
-	spurious = sir >> 7;
-
-	if (spurious) {
-		printk(KERN_WARNING "Spurious irq %i: 0x%08x, please flush "
-					"posted write for irq %i\n",
-					irq, sir, previous_irq);
-		return spurious;
-	}
-
-	return 0;
-}
-
 /* XXX: FIQ and additional INTC support (only MPU at the moment) */
 static void omap_ack_irq(struct irq_data *d)
 {
 	intc_bank_write_reg(0x1, &irq_banks[0], INTC_CONTROL);
 }
 
-static void omap_mask_irq(struct irq_data *d)
-{
-	unsigned int irq = d->irq;
-	int offset = irq & (~(IRQ_BITS_PER_REG - 1));
-
-	if (cpu_is_omap34xx() && !cpu_is_ti816x()) {
-		int spurious = 0;
-
-		/*
-		 * INT_34XX_GPT12_IRQ is also the spurious irq. Maybe because
-		 * it is the highest irq number?
-		 */
-		if (irq == INT_34XX_GPT12_IRQ)
-			spurious = omap_check_spurious(irq);
-
-		if (!spurious)
-			previous_irq = irq;
-	}
-
-	irq &= (IRQ_BITS_PER_REG - 1);
-
-	intc_bank_write_reg(1 << irq, &irq_banks[0], INTC_MIR_SET0 + offset);
-}
-
-static void omap_unmask_irq(struct irq_data *d)
-{
-	unsigned int irq = d->irq;
-	int offset = irq & (~(IRQ_BITS_PER_REG - 1));
-
-	irq &= (IRQ_BITS_PER_REG - 1);
-
-	intc_bank_write_reg(1 << irq, &irq_banks[0], INTC_MIR_CLEAR0 + offset);
-}
-
 static void omap_mask_ack_irq(struct irq_data *d)
 {
-	omap_mask_irq(d);
+	irq_gc_mask_disable_reg(d);
 	omap_ack_irq(d);
 }
 
-static struct irq_chip omap_irq_chip = {
-	.name		= "INTC",
-	.irq_ack	= omap_mask_ack_irq,
-	.irq_mask	= omap_mask_irq,
-	.irq_unmask	= omap_unmask_irq,
-};
-
 static void __init omap_irq_bank_init_one(struct omap_irq_bank *bank)
 {
 	unsigned long tmp;
@@ -186,11 +121,31 @@ int omap_irq_pending(void)
 	return 0;
 }
 
+static __init void
+omap_alloc_gc(void __iomem *base, unsigned int irq_start, unsigned int num)
+{
+	struct irq_chip_generic *gc;
+	struct irq_chip_type *ct;
+
+	gc = irq_alloc_generic_chip("INTC", 1, irq_start, base,
+					handle_level_irq);
+	ct = gc->chip_types;
+	ct->chip.irq_ack = omap_mask_ack_irq;
+	ct->chip.irq_mask = irq_gc_mask_disable_reg;
+	ct->chip.irq_unmask = irq_gc_unmask_enable_reg;
+
+	ct->regs.ack = INTC_CONTROL;
+	ct->regs.enable = INTC_MIR_CLEAR0;
+	ct->regs.disable = INTC_MIR_SET0;
+	irq_setup_generic_chip(gc, IRQ_MSK(num), IRQ_GC_INIT_MASK_CACHE,
+				IRQ_NOREQUEST | IRQ_NOPROBE, 0);
+}
+
 void __init omap_init_irq(void)
 {
 	unsigned long nr_of_irqs = 0;
 	unsigned int nr_banks = 0;
-	int i;
+	int i, j;
 
 	for (i = 0; i < ARRAY_SIZE(irq_banks); i++) {
 		unsigned long base = 0;
@@ -215,17 +170,15 @@ void __init omap_init_irq(void)
 
 		omap_irq_bank_init_one(bank);
 
+		for (i = 0, j = 0; i < bank->nr_irqs; i += 32, j += 0x20)
+			omap_alloc_gc(bank->base_reg + j, i, 32);
+
 		nr_of_irqs += bank->nr_irqs;
 		nr_banks++;
 	}
 
 	printk(KERN_INFO "Total of %ld interrupts on %d active controller%s\n",
 	       nr_of_irqs, nr_banks, nr_banks > 1 ? "s" : "");
-
-	for (i = 0; i < nr_of_irqs; i++) {
-		irq_set_chip_and_handler(i, &omap_irq_chip, handle_level_irq);
-		set_irq_flags(i, IRQF_VALID);
-	}
 }
 
 #ifdef CONFIG_ARCH_OMAP3