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, 14 insertions, 10 deletions

diff --git a/arch/sh/kernel/cpu/sh2a/setup-sh7206.c b/arch/sh/kernel/cpu/sh2a/setup-sh7206.c
index 4ed9110632bc..b6e3a6351fa6 100644
--- a/arch/sh/kernel/cpu/sh2a/setup-sh7206.c
+++ b/arch/sh/kernel/cpu/sh2a/setup-sh7206.c
@@ -57,7 +57,7 @@ static int __init sh7206_devices_setup(void)
 }
 __initcall(sh7206_devices_setup);
 
-static struct ipr_data sh7206_ipr_map[] = {
+static struct ipr_data ipr_irq_table[] = {
         { 140,  7, 12, 2 },     /* CMI0 */
         { 164,  8,  4, 2 },     /* MTU2_TGI1A */
         { 240, 13, 12, 3 },     /* SCIF0_BRI */
@@ -78,7 +78,7 @@ static struct ipr_data sh7206_ipr_map[] = {
         { 255, 13,  0, 3 },     /* SCIF3_TXI */
 };
 
-static unsigned int ipr_offsets[] = {
+static unsigned long ipr_offsets[] = {
         0xfffe0818,     /* IPR01 */
         0xfffe081a,     /* IPR02 */
         0,              /* unused */
@@ -95,15 +95,19 @@ static unsigned int ipr_offsets[] = {
         0xfffe0c10,     /* IPR14 */
 };
 
-/* given the IPR index return the address of the IPR register */
-unsigned int map_ipridx_to_addr(int idx)
-{
-        if (unlikely(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),
+
+        .ipr_data       = ipr_irq_table,
+        .nr_irqs        = ARRAY_SIZE(ipr_irq_table),
+
+        .chip = {
+                .name   = "IPR-sh7206",
+        },
+};
 
 void __init init_IRQ_ipr(void)
 {
-        make_ipr_irq(sh7206_ipr_map, ARRAY_SIZE(sh7206_ipr_map));
+        register_ipr_controller(&ipr_irq_desc);
 }