sh: rework ipr code

This patch reworks the ipr code by grouping the offset array together
with the ipr_data structure in a new data structure called ipr_desc.
This new structure also contains the name of the controller in struct
irq_chip. The idea behind putting struct irq_chip in there is that we
can use offsetof() to locate the base addresses in the irq_chip
callbacks. This strategy has much in common with the recently merged
intc2 code.

One logic change has been made - the original ipr code enabled the
interrupts by default but with this patch they are all disabled by
default.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 18 insertions, 14 deletions

diff --git a/arch/sh/kernel/cpu/sh4/setup-sh7760.c b/arch/sh/kernel/cpu/sh4/setup-sh7760.c
index 6d3c9189777..3df16975567 100644
--- a/arch/sh/kernel/cpu/sh4/setup-sh7760.c
+++ b/arch/sh/kernel/cpu/sh4/setup-sh7760.c
@@ -109,7 +109,12 @@ static struct intc2_desc intc2_irq_desc __read_mostly = {
 	},
 };
 
-static struct ipr_data sh7760_ipr_map[] = {
+void __init init_IRQ_intc2(void)
+{
+	register_intc2_controller(&intc2_irq_desc);
+}
+
+static struct ipr_data ipr_irq_table[] = {
 	/* IRQ, IPR-idx, shift, priority */
 	{ 16, 0, 12, 2 }, /* TMU0 TUNI*/
 	{ 17, 0,  8, 2 }, /* TMU1 TUNI */
@@ -146,20 +151,19 @@ static unsigned long ipr_offsets[] = {
 	0xffd00010UL,	/* 3: IPRD */
 };
 
-/* given the IPR index return the address of the IPR register */
-unsigned int map_ipridx_to_addr(int idx)
-{
-	if (idx >= ARRAY_SIZE(ipr_offsets))
-		return 0;
-	return ipr_offsets[idx];
-}
+static struct ipr_desc ipr_irq_desc = {
+	.ipr_offsets	= ipr_offsets,
+	.nr_offsets	= ARRAY_SIZE(ipr_offsets),
 
-void __init init_IRQ_intc2(void)
-{
-	register_intc2_controller(&intc2_irq_desc);
-}
+	.ipr_data	= ipr_irq_table,
+	.nr_irqs	= ARRAY_SIZE(ipr_irq_table),
+
+	.chip = {
+		.name	= "IPR-sh7760",
+	},
+};
 
-void __init  init_IRQ_ipr(void)
+void __init init_IRQ_ipr(void)
 {
-	make_ipr_irq(sh7760_ipr_map, ARRAY_SIZE(sh7760_ipr_map));
+	register_ipr_controller(&ipr_irq_desc);
 }