1 files changed, 60 insertions, 15 deletions

diff --git a/arch/arm/mach-davinci/cp_intc.c b/arch/arm/mach-davinci/cp_intc.c
index f83152d643c5..006dae8dfe44 100644
--- a/arch/arm/mach-davinci/cp_intc.c
+++ b/arch/arm/mach-davinci/cp_intc.c
@@ -9,9 +9,14 @@
  * kind, whether express or implied.
  */
 
+#include <linux/export.h>
 #include <linux/init.h>
 #include <linux/irq.h>
+#include <linux/irqdomain.h>
 #include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
 
 #include <mach/common.h>
 #include <mach/cp_intc.h>
@@ -28,7 +33,7 @@ static inline void cp_intc_write(unsigned long value, unsigned offset)
 
 static void cp_intc_ack_irq(struct irq_data *d)
 {
-	cp_intc_write(d->irq, CP_INTC_SYS_STAT_IDX_CLR);
+	cp_intc_write(d->hwirq, CP_INTC_SYS_STAT_IDX_CLR);
 }
 
 /* Disable interrupt */
@@ -36,20 +41,20 @@ static void cp_intc_mask_irq(struct irq_data *d)
 {
 	/* XXX don't know why we need to disable nIRQ here... */
 	cp_intc_write(1, CP_INTC_HOST_ENABLE_IDX_CLR);
-	cp_intc_write(d->irq, CP_INTC_SYS_ENABLE_IDX_CLR);
+	cp_intc_write(d->hwirq, CP_INTC_SYS_ENABLE_IDX_CLR);
 	cp_intc_write(1, CP_INTC_HOST_ENABLE_IDX_SET);
 }
 
 /* Enable interrupt */
 static void cp_intc_unmask_irq(struct irq_data *d)
 {
-	cp_intc_write(d->irq, CP_INTC_SYS_ENABLE_IDX_SET);
+	cp_intc_write(d->hwirq, CP_INTC_SYS_ENABLE_IDX_SET);
 }
 
 static int cp_intc_set_irq_type(struct irq_data *d, unsigned int flow_type)
 {
-	unsigned reg		= BIT_WORD(d->irq);
-	unsigned mask		= BIT_MASK(d->irq);
+	unsigned reg		= BIT_WORD(d->hwirq);
+	unsigned mask		= BIT_MASK(d->hwirq);
 	unsigned polarity	= cp_intc_read(CP_INTC_SYS_POLARITY(reg));
 	unsigned type		= cp_intc_read(CP_INTC_SYS_TYPE(reg));
 
@@ -99,18 +104,43 @@ static struct irq_chip cp_intc_irq_chip = {
 	.irq_set_wake	= cp_intc_set_wake,
 };
 
-void __init cp_intc_init(void)
+static struct irq_domain *cp_intc_domain;
+
+static int cp_intc_host_map(struct irq_domain *h, unsigned int virq,
+			  irq_hw_number_t hw)
 {
-	unsigned long num_irq	= davinci_soc_info.intc_irq_num;
+	pr_debug("cp_intc_host_map(%d, 0x%lx)\n", virq, hw);
+
+	irq_set_chip(virq, &cp_intc_irq_chip);
+	set_irq_flags(virq, IRQF_VALID | IRQF_PROBE);
+	irq_set_handler(virq, handle_edge_irq);
+	return 0;
+}
+
+static const struct irq_domain_ops cp_intc_host_ops = {
+	.map = cp_intc_host_map,
+	.xlate = irq_domain_xlate_onetwocell,
+};
+
+int __init cp_intc_of_init(struct device_node *node, struct device_node *parent)
+{
+	u32 num_irq		= davinci_soc_info.intc_irq_num;
 	u8 *irq_prio		= davinci_soc_info.intc_irq_prios;
 	u32 *host_map		= davinci_soc_info.intc_host_map;
 	unsigned num_reg	= BITS_TO_LONGS(num_irq);
-	int i;
+	int i, irq_base;
 
 	davinci_intc_type = DAVINCI_INTC_TYPE_CP_INTC;
-	davinci_intc_base = ioremap(davinci_soc_info.intc_base, SZ_8K);
+	if (node) {
+		davinci_intc_base = of_iomap(node, 0);
+		if (of_property_read_u32(node, "ti,intc-size", &num_irq))
+			pr_warn("unable to get intc-size, default to %d\n",
+				num_irq);
+	} else {
+		davinci_intc_base = ioremap(davinci_soc_info.intc_base, SZ_8K);
+	}
 	if (WARN_ON(!davinci_intc_base))
-		return;
+		return -EINVAL;
 
 	cp_intc_write(0, CP_INTC_GLOBAL_ENABLE);
 
@@ -165,13 +195,28 @@ void __init cp_intc_init(void)
 		for (i = 0; host_map[i] != -1; i++)
 			cp_intc_write(host_map[i], CP_INTC_HOST_MAP(i));
 
-	/* Set up genirq dispatching for cp_intc */
-	for (i = 0; i < num_irq; i++) {
-		irq_set_chip(i, &cp_intc_irq_chip);
-		set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
-		irq_set_handler(i, handle_edge_irq);
+	irq_base = irq_alloc_descs(-1, 0, num_irq, 0);
+	if (irq_base < 0) {
+		pr_warn("Couldn't allocate IRQ numbers\n");
+		irq_base = 0;
+	}
+
+	/* create a legacy host */
+	cp_intc_domain = irq_domain_add_legacy(node, num_irq,
+					irq_base, 0, &cp_intc_host_ops, NULL);
+
+	if (!cp_intc_domain) {
+		pr_err("cp_intc: failed to allocate irq host!\n");
+		return -EINVAL;
 	}
 
 	/* Enable global interrupt */
 	cp_intc_write(1, CP_INTC_GLOBAL_ENABLE);
+
+	return 0;
+}
+
+void __init cp_intc_init(void)
+{
+	cp_intc_of_init(NULL, NULL);
 }